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MIC5159 programmable current limit cap ldo regulator controller ittybitty is a registered trademark of micrel, inc. micrel inc. ? 2180 fortune drive ? san jose, ca 95131 ? usa ? tel +1 ( 408 ) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com june 2006 m9999-062706 general description micrel?s MIC5159 is a precision-voltage regulator controller. used with an external p-channel mosfet, the MIC5159 forms a two-chip low-dropout regulator capable of driving a wide range of output currents. the MIC5159 operates from an input of 1.65v to 5.5v. the low input voltage allows the MIC5159 to operate off of high power 1.8v rails to generate lower voltages such as 1.5v. features of the MIC5159 in clude enable input and current- limit protection. as a cap design, the MIC5159 is stable with ceramic output capacitors. the MIC5159 is packaged in the ittybitty ? sot-23-6, and is offered in fixed and adjustable output voltages. junction temperature range of the MIC5159 is from ?40c to +125c. features ? fast transient response ? input voltage range: v in 1.65v to 5.5v ? 1.0% initial output tolerance ? fixed 1.8v or adjustable output voltage down to 1.25v ? stable with ceramic output capacitor ? capable up to 10a ? excellent line and load regulation specifications ? logic-controlled shutdown ? programmable current limit ? current-limit protection ? ittybitty ? sot-23-6 package ? available temperature range:?40c to +125c ? applications ? ultra-high current, ultra-low dropout voltage regulator ? high-efficiency linear power supplies ? low-voltage distributed power ? fixed telecom ? multimedia and pc power supplies ? battery chargers ? low-voltage dsp, microprocessor and microcontroller power supplies typical application gate en fb v in in is v out gnd u1 MIC5159bm6/ym6 q1?q4 sub15p01?52 4 r1 5 1 3 gnd c1 r2 gnd c1 c1 adjustable output voltage v in = 3.3v v out = 2.5v c out = 200f 10a 100ma
micrel, inc. MIC5159 june 2006 2 m9999-062706 ordering information part number standard pb-free marking voltage* junction temp. range package MIC5159bm6 MIC5159ym6 lzaa adj. ?40 to +125c sot-23-6 MIC5159-1.8bm6 MIC5159-1.8ym6 lz18 1.8v. ?40 to +125c sot-23-6 MIC5159-3.0bm6 MIC5159-3.0ym6 lz30 3.0v ?40 to +125c sot-23-6 note: other voltage available. c ontact micrel for details. pin configuration in gnd gate is 13 4 6 adj lzaa 5 en 2 pin 1 index in gnd gate is 13 4 6 out lzxx 5 en 2 pin 1 index sot-23-6 (m6) adjustable voltage version sot-23-6 (m6) fixed voltage version pin description pin number pin name pin function 1 in input voltage. 2 gnd ground. 3 is current sense: is must be tied to vin pin if the current limi t feature is not used. 4 gate gate drive of the external p-channel mosfet. 5 en enable input: logic level on/off c ontrol. logic high = on; logic low = off. adj adjustable regulator feedback input: connect to resistor voltage divider. 6 out output voltage: connect to drain of p-channel mosfet to regulate output to proper voltage.
micrel, inc. MIC5159 june 2006 3 m9999-062706 absolute maximum ratings (1) supply voltage (v in ) ....................................................+6.0v enable input voltage (v en )..........................................+6.0v power dissipation (p d(max) ) ........................................ note 3 storage temperature (t s ) .........................?65c to +150c lead temperature (solde ring, 5 se c.) ........................ 260c eds rating (4) .................................................................. 2kv operating ratings (2) supply voltage (v in ) ................................... +1.65v to +5.5v enable input voltage (v en )................................ 0v to +5.5v junction temperature (t j ) ..................?40c t j +125c package thermal resistance sot-23-6 ( ja ).................................................235 c/w electrical characteristics (5) t a = 25c with v in = v out + 1v; v en = 1.2v, c in = c out = 10f, ceramic, i out = 10ma; bold values indicate ?40c < t j < +125c; unless otherwise specified, note 3 parameter condition min typ max units at 25c ?1 +1 % output voltage accuracy over temperature range ?2 +2 % output voltage line regulation v in = v out + 1.0v to 5.5v ?0.1 0.007 +0.1 %/v output voltage load regulation i l = 10ma to 1.0a 0.2 1.0 % v en 0.2v (MIC5159 off) 15 30 a ground pin current (6) v en 1.2v (MIC5159 on) 10 20 ma adjust pin bias current 1 a (pfet fully on); v in = 5.0v 4.5 v (pfet fully on); v in = 3.3v 3.1 v maximum v gs (pfet fully on); v in = 2.5v 2.3 v current-limit threshold v in ? v is 40 50 65 mv start-up time v en = v in 30 150 s enable input regulator enabled 1.2 v regulator shutdown 0.2 v enable input threshold enable hysteresis 20 50 250 mv independent of state 0.01 na enable pin input current 1 a notes: 1. exceeding the absolute maximum rating may damage the device. 2. the device is not guaranteed to function outside its operating rating. 3. p d(max) = (t j(max) ? ta) ja , where ja depends upon the printed circuit layou t, see ?applications information.? 4. devices are esd sensitive. handling precautions re commended. human body model, 1.5k in series with 100pf. 5. specification for packaged product only. 6. i gnd is the quiescent current. i in = i gnd + i out .
micrel, inc. MIC5159 june 2006 4 m9999-062706 typical characteristics 1.220 1.225 1.230 1.235 1.240 1.245 1.250 1.65 2.15 2.65 3.15 3.65 4.15 4.65 5.15 5.65 reference voltage (v) input voltage (v) reference voltage vs. input voltage 1.230 1.231 1.232 1.233 1.234 1.235 1.236 1.237 1.238 1.239 1.240 -40 -20 0 20 40 60 80 100 120 reference voltage (v) temperature (c) reference voltage vs. temperature v in =3.3v 1.230 1.231 1.232 1.233 1.234 1.235 1.236 1.237 1.238 1.239 1.240 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 output voltage (v) load (a) output voltage vs. load v in =2.5v 0 1 2 3 4 5 6 7 8 9 10 1.65 2.15 2.65 3.15 3.65 4.15 4.65 5.15 5.65 quiescent current (ma) input voltage (v) quiescent current vs. input voltage i load =10ma 0 1 2 3 4 5 6 7 8 9 10 -40 -20 0 20 40 60 80 100 120 quiescent current (ma) temperature (c) quiescent current vs. temperature v in =3.3v 0 1 2 3 4 5 6 7 8 9 10 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 quiescent current (ma) load (a) quiescent current vs. load v in =2.5v 40 42 44 46 48 50 52 54 56 58 60 1.65 2.15 2.65 3.15 3.65 4.15 4.65 5.15 5.65 current limit threshold (mv) input voltage (v) current limit threshold vs. input voltage 40 42 44 46 48 50 52 54 56 58 60 -40 -20 0 20 40 60 80 100 120 current limit threshold (mv) temperature (c) current limit threshold vs. temperature 0 100 200 300 400 500 600 700 800 -40 -20 0 20 40 60 80 100 120 enable threshold (mv) temperature (c) enable threshold vs. temperature en on en off 0 100 200 300 400 500 600 700 1.65 2.15 2.65 3.15 3.65 4.15 4.65 5.15 5.65 enable threshold (mv) input voltage (v) enable threshold vs. input voltage en on en off 0 2 4 6 8 10 12 14 16 18 20 1.65 2.15 2.65 3.15 3.65 4.15 4.65 5.15 5.65 shutdown current (a) input voltage (v) shutdown current vs. input voltage 85c 25c -40c
micrel, inc. MIC5159 june 2006 5 m9999-062706 functional characteristics v in = 1.8v v out = 1.5v c out = 100f 2a 10ma v in = 3.3v v out = 1.8v
micrel, inc. MIC5159 june 2006 6 m9999-062706 functional diagram en in gate gnd v out v out v ref v ref v in r s i s enable i sns amplifier buffer s block diagram ? fixed output voltages en in gate adj. v out v ref v ref v in r s i s enable i sns amplifier r1 r2 buffer s block diagram ? adjustable output voltages
micrel, inc. MIC5159 june 2006 7 m9999-062706 application information the MIC5159 is a high performance voltage regulator controller. when used with an external p-channel mosfet and a tiny ceramic output capacitor, it forms a wide variety of simple, inexpensive ultra-low-dropout voltage regulators. current sense resistor selection a current sense resistor placed between the input and the current sense pin (is) a llows for programmability of the current limit. th is resistor can simply be calculated by: ? ? ? ? ? ? ? ? = out sense i 50mv r where i out is the maximum output current. for example, the current sense re sistor for a 2.5v in to 1.8v out , 5a, linear regulator calculates as follows: ? ? ? ? ? ? = 5a 50mv r sense r sense = 10m ? p-channel mosfet selection the p-channel mosfet selected for use with the MIC5159 must satisfy the following requirements: ? input voltage ? gate threshold ? load current ? dropout voltage (input-to-output differential) ? thermal performance to prevent damage to the p-channel mosfet, the maximum input voltage (v in(max) ) must be less than its drain-source breakdown voltage (bv ds ). in addition, the minimum input voltage (v in(min) ) must be greater than or equal to the gate threshold voltage (v gs ) of the p- channel mosfet. for a given output current and dropout requirement, the on-resistance (r ds(on) ) of the p-channel mosfet must also be determined. the minimum r ds(on) of the p-channel mosfet is calculated as follows: () sense out(max) out in(min) ds(on) r i v v r ? ? ? ? ? ? ? ? ? ? = where i out(max) is the maximum output current and r sense is the current sense resistor. for example, the MIC5159-1. 8bm6 is used with an external mosfet to form a 5a ldo with an input of 2.5v. either a 2.5v or 1.8v gate threshold mosfet can be selected. the minimum r ds(on) is calculated as: ( ) m ? 10 5a v 8 . 1 2.5v r ds(on) ? ? ? ? ? ? ? ? = r ds(on) = 130m ? according to the above calc ulation, the minimum r ds(on) is 130m ? for a 2.5v to 1.8v ldo with 5a of output current. for this design, the r ds(on) for the fets should maintain better than 130m ? over the required temperature, current, and voltage conditions. placing two or more p-channel fets in parallel can reduce the total r ds(on) of the regulator. this also aids thermal dissipation by sharing the current and heat between the multiple fets. thermal considerations linear regulators are simple to use. the most complicated design parameters to consider are thermal characteristics. since the MIC5159 offers no thermal protection, thermal design requires the following application-specific parameters: ? maximum ambient temperature (t a ) ? output current (i out ) ? output voltage (v out ) ? input voltage (v in ) first, calculate the maximum power dissipation of the regulator: p d = (v in ? v out ) i out ground current can generally be ignored. the amount of power dissipated by ground current and input voltage is minimal. minimum ja for the mosfet can be calculated using the following formula: ( ) ? ? ? ? ? ? ? ? ? = d a j(max) ja p t t where t j(max) is equal to the maximum die temperature of the p-channel. ja = jc + cs + sa example for the same regulator, 2.5v in to 1.8v out at 5a with an ambient temperature of 60c: p d = (2.5v?1.8v) 5a p d = 3.5w where v in is the maximum v in and i out is the maximum i out . the p-channel mosfet must be able to dissipate 3.5w. the minimum ja to maintain a maximum t j of 150c (max.) t j according to a typical mosfet data sheet is as follows: ( ) 3.5w c 60 c 150 ja ? =
micrel, inc. MIC5159 june 2006 8 m9999-062706 ja = 25.71c/w the heatsink and mosfet must have a combined thermal resistance to meet the above criteria. the typical thermal resistance from the junction to the case ( jc ) of a to-263 (d 2 pack) is 6c/w. adding 0.2c/w for case to sink thermal resistance ( cs ), the heatsink must have a sink to ambient thermal resistance ( sa ) of: sa = ja ? ( jc + cs ) sa = 25.71c/w ? (6c/w + 0.2c/w) sa = 19.51c/w according to the calculations, the heatsink must have a sa of 19.51c/w or better. for a full discussion of heat sinking and thermal effects on voltage regulators, refer to the ? regulator thermals ? section of micrel?s designing with low-dropout voltage regulators handbook. short-circuit current limit the above thermal design calculations apply to normal operation. in the case where the p-channel mosfet must survive extended period s of short-circuit current, another approach for thermal design must be considered. due to the fact that the MIC5159 delivers constant current limiting, power dissipated by the mosfet is equal to the input voltage multiplied by the maximum output current. figure 1 shows a simple, inexpensive circuit that allows the current limiting to be re-entrant. this reduces power dissipation in current limit ed conditions. as the output voltage begins to drop, the differential voltage across the input and output increases. this pulls the current sense voltage lower, reducing the amount of output current to maintain 50mv across the sense resistor. this reduction in output current equates to a reduction in power dissipation in the mosfet. figures 2 and 3 show a comparison of linear current limiting versus the re- entrant current limiting scheme implemented in figure 1. MIC5159-1.8bm6/ym6 r vout r sense c1 10f 3.3 v in r vin q1,2,3 si4433dyx3 isense vin gate adj c2 47f 1.8 v out 1.5 a figure 1. re-entrant current limit 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 0.00 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 output voltage (v) output current (a) constant current limit re-entrant current limit figure 2. output voltage characteristics re-entrant current limit 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 0 0.5 1 1.5 power dissipation (w) output voltage (v) re-entrant current limiting constant current limiting figure 3. power dissipation vs. output voltage enable/shutdown the MIC5159 comes with an active-high enable pin that allows the regulator to be disabled. forcing the enable pin low disables the regulator and sends it into a low off- mode-current state. forcing the enable pin high enables the output voltage. this part is cmos and the enable pin cannot be left floating; a floating enable pin may cause an indeterminate state on the output. output capacitor the MIC5159 requires an output capacitor to maintain stability and improve tran sient response. proper selection is important to ensure proper operation. the MIC5159 output capacitor se lection is highly dependent upon the components and the application. with a very high gate charge (gate capacitance) mosfet, the output requires a much larger valued ceramic capacitor for stability. as an alternative to a large valued ceramic capacitor, a smaller-valued tantalum capacitor can be used to provide stability. at higher load currents, lower r ds(on) mosfets are used; these mosfets typically having much larger gate charge. if the application does not require ultra-low-dropout voltage, smaller values of ceramic capacitance may be used.
micrel, inc. MIC5159 june 2006 9 m9999-062706 input capacitor an input capacitor of 1.0f or greater is recommended when the device is more than 4 inches away from the bulk ac supply capacitance or when the supply is a battery. small, surface mount, ceramic capacitors can be used for bypassing the input to the regulator, further improving the integrity of t he output voltage. larger input capacitors may be required depending on the impedance of the source and the output load requirements. layout considerations input and output capacitor pl acement should be as close as possible to the input and output, respectively. trace resistance between the current sense and the mosfet source should be minimized. trace resistance will increase dropout voltage. this is more of a factor at higher output currents. also, a minimum amount of distance between the gate pin, on the MIC5159, and t he p-channel mosfet gate is recommended. a long trace can create a small parasitic inductor. this, coupled to the gate capacitance of the mosfet, can create a high frequency tank circuit. a small 50 ? resistor in series with the gate may be required to eliminate high-frequency noise. adjustable regulator design the MIC5159 allows programming the output voltage anywhere between 1.235v to v in . two resistors are used. see figure 4. the resistor values are calculated by: ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? = 1 1.235 v r2 r1 out where v out is the desired output voltage. v in r s r1 r2 v out c out = 10f ceramic si3445 is adj in en gnd gate MIC5159-x.x figure 4. adjustable regulator design
micrel, inc. MIC5159 june 2006 10 m9999-062706 designing with MIC5159 the following section details: ? application examples of possible input/output configurations with related schematics designator. ? schematics with ?bill of materials? recommendation, dropout performance and maximum output current for each fet combination. ? further advice on mosfet selection. 3.3v in to 2.5v out conversion i out c out mosfet package schematic 1.0a 10f si4433dy so-8 c 2.5a 22f si4433dy x2 so-8 d 2.5a 10f sub15p01-52 d2pak h 3.5a 44f si4433dy x3 so-8 e 5.0a 44f si4433dy x4 so-8 f 5.0a 22f sub15p01-52 x2 d2pak i 7.5a 44f sub15p01-52 x3 d2pak j 10.0a 44f sub15p01-52 x4 d2pak k 3.3v in to 1.8v out conversion i out c out mosfet package schematic 0.6a 10f si4433dy so-8 c 1.25a 22f si4433dy x2 so-8 d 1.25a 10f sub15p01-52 d2pak h 2.0a 44f si4433dy x3 so-8 e 2.5a 44f si4433dy x4 so-8 f 2.5a 22f sub15p01-52 x2 d2pak i 3.75a 44f sub15p01-52 x3 d2pak j 5.0a 44f sub15p01-52 x4 d2pak k 3.3v in to 1.5v out conversion i out c out mosfet package schematic 0.5a 10f si4433dy so-8 c 1.0a 22f si4433dy x2 so-8 d 1.0a 10f sub15p01-52 d2pak h 1.5a 44f si4433dy x3 so-8 e 2.0a 44f si4433dy x4 so-8 f 2.0a 22f sub15p01-52 x2 d2pak i 3.0a 44f sub15p01-52 x3 d2pak j 4.25a 44f sub15p01-52 x4 d2pak k 3.3v in to 1.25v out conversion i out c out mosfet package schematic 0.4a 10f si4433dy so-8 c 0.75a 22f si4433dy x2 so-8 d 0.75a 10f sub15p01-52 d2pak h 1.25a 44f si4433dy x3 so-8 e 1.75a 44f si4433dy x4 so-8 f 1.75a 22f sub15p01-52 x2 d2pak i 2.75a 44f sub15p01-52 x3 d2pak j 3.75a 44f sub15p01-52 x4 d2pak k 2.5v in to 1.8v out conversion i out c out mosfet package schematic 1.25a 10f si4433dy so-8 c 2.5a 22f si4433dy x2 so-8 d 2.5a 10f sub15p01-52 d2pak h 4.0a 44f si4433dy x3 so-8 e 5.5a 44f si4433dy x4 so-8 f 5.5a 22f sub15p01-52 x2 d2pak i 8.0a 44f sub15p01-52 x3 d2pak j 11.0a 44f sub15p01-52 x4 d2pak k 2.5v in to 1.5v out conversion i out c out mosfet package schematic 1.0a 10f si4433dy so-8 c 2.0a 22f si4433dy x2 so-8 d 2.0a 10f sub15p01-52 d2pak h 3.0a 44f si4433dy x3 so-8 e 4.0a 44f si4433dy x4 so-8 f 4.0a 22f sub15p01-52 x2 d2pak i 6.0a 44f sub15p01-52 x3 d2pak j 8.0a 44f sub15p01-52 x4 d2pak k 2.5v in to 1.25v out conversion i out c out mosfet package schematic 0.75a 10f si4433dy so-8 c 1.5a 22f si4433dy x2 so-8 d 1.5a 10f sub15p01-52 d2pak h 2.0a 44f si4433dy x3 so-8 e 3.0a 44f si4433dy x4 so-8 f 3.0a 22f sub15p01-52 x2 d2pak i 4.5a 44f sub15p01-52 x3 d2pak j 6.0a 44f sub15p01-52 x4 d2pak k
micrel, inc. MIC5159 june 2006 11 m9999-062706 1.8v in to 1.5v out conversion i out c out mosfet package schematic 2.0a 10f si3445dv tsop-6 a 4.0a 22f si3445dv x2 tsop-6 b 6.0a 200f si4403dy x2 so-8 g 7.0a (1) 44f sub15p01-52 x4 d2pak k note: 1. for space constrained designs , a dpak equivalent can be used in this application (sud15p01-52). this is due to r ds(on) limitation not power dissipation. 1.8v in to 1.25v out conversion i out c out mosfet package schematic 1.0a 10f si3445dv tsop-6 a 1.5a 10f si4433dy so-8 c 3.0a 22f si4433dy x2 so-8 d 3.0a 10f sub15p01-52 d2pak h 4.5a 44f si4433dy x3 so-8 e 6.0a 44f si4433dy x4 so-8 f 6.5a 22f sub15p01-52 x2 d2pak i 9.0a 88f sub15p01-52 x3 d2pak j 13.0a 88f sub15p01-52 x4 d2pak k
micrel, inc. MIC5159 june 2006 12 m9999-062706 schematic a input/output combination examples input output maximum current 1.8v 1.5v 2a 1.8v 1.25v 1a u1 MIC5159bm6/ym6 0 1 2 3 4 5 6 0 0.5 1 1.5 2 2.5 3 input?output voltage (v) output current (a) dropout max. power dissipation at 60c t a application circuit si3445dv soa bill of materials item part number manufact urer description qty. c1 grm40 x7r 106 6.3 murata (1) 10f, 6.3v ceramic mlcc, size 0805 1 c2 c2012x5rr0j106m murata 10f, 6.3v ceramic mlcc, size 0805 1 r1 crcw08051002 vishay dale (2) 10k ? resistor, size 0805 1 crcw08059761 vishay dale output voltage:2.5v; 9.76k ? resistor, size 0805 (3) 1 crcw08052152 vishay dale output voltage:1.8v; 21.5k ? resistor, size 0805 (3) 1 crcw08054642 vishay dale output voltage:1.5v; 46.4k ? resistor, size 0805 (3) 1 r2 crcw08058253 vishay dale output voltage:1.25v; 825k ? resistor, size 0805 (3) 1 r3 crcw080549r9 f vishay dale 49.9 ? resistor, size 0805 1 q1 si3445dv vishay siliconix (4) p-channel mosfet tsop-6 1 u1 MIC5159bm6/ym6 micrel, inc. (5) programmable current limit cap ldo regulator 1 notes: 1. murata tel: 949-916-4000 2. vishay dale tel: 402-563-6866 3. to calculate other output voltage values: 1 1.235 out v r1 r2 ? = ? ? ? ? ? ? ? ? 4. vishay siliconix tel: 402-563-6866 5. micrel, inc. tel: 408-944-0800
micrel, inc. MIC5159 june 2006 13 m9999-062706 schematic b input/output combination examples input output maximum current 1.8v 1.5v 4a u1 MIC5159bm6/ym6 0 1 2 3 4 5 6 0123456 input?output voltage (v) output current (a) dropout max. power dissipation at 60c t a application circuit si3445dv x2 soa bill of materials item part number manufacturer description qty. grm40 x7r 106 6.3 murata (1) 10f, 6.3v ceramic mlcc, size 0805 1 c1 c2012x5rr0j106m tdk (2) 10f, 6.3v ceramic mlcc, size 0805 grm42-2 x5r 226k 6.3 murata 22f, 6.3v ceramic mlcc, size 1210 1 c2 c2012x5rr0j106m tdk 22f, 10v ceramic mlcc, size 1210 r1 crcw08051002 vishay dale (3) 10k ? resistor, size 0805 1 crcw08059761 vishay dale ou tput voltage:2.5v; 9.76k ? resistor, size 0805 (4) 1 crcw08052152 vishay dale ou tput voltage:1.8v; 21.5k ? resistor, size 0805 (4) 1 crcw08054642 vishay dale ou tput voltage:1.5v; 46.4k ? resistor, size 0805 (4) 1 r2 crcw08058253 vishay dale output voltage:1.25v; 825k ? resistor, size 0805 (4) 1 r3 crcw080549r9 f vishay dale 49.9 ? resistor, size 0805 1 q1, q2 si3445dv vishay siliconix (5) p-channel mosfet tsop-6 2 u1 MIC5159bm6/ym6 micrel, inc. (6) programmable current limit cap ldo regulator 1 notes: 1. murata tel: 949-916-4000 2. tdk tel: 1-888-835-6646 3. vishay dale tel: 402-563-6866 4. to calculate other output voltage values: 1 1.235 out v r1 r2 ? = ? ? ? ? ? ? ? ? 5. vishay siliconix tel: 402-563-6866 6. micrel, inc. tel: 408-944-0800
micrel, inc. MIC5159 june 2006 14 m9999-062706 schematic c input/output combination examples input output maximum current 3.3v 2.5v 1a 3.3v 1.8v 0.6a 3.3v 1.5v 0.5a 3.3v 1.25v 0.4a 2.5v 1.8v 1.25a 2.5v 1.5v 1a 2.5v 1.25v 0.75a 1.8v 1.25v 1.5a u1 MIC5159bm6/ym6 0 1 2 3 4 5 6 0 0.5 1 1.5 2 input?output voltage (v) output current (a) dropout max. power dissipation at 60c t a application circuit si34433dy soa bill of materials item part number manufacturer description qty. c1 grm40 x7r 106 6.3 murata (1) 10f, 6.3v ceramic mlcc, size 0805 1 c2 c2012x5rr0j106m tdk (2) 10f, 6.3v ceramic mlcc, size 0805 1 r1 crcw08051002 vishay dale (3) 10k ? resistor, size 0805 1 crcw08059761 vishay dale output voltage:2.5v; 9.76k ? resistor, size 0805 (4) 1 crcw08052152 vishay dale output voltage:1.8v; 21.5k ? resistor, size 0805 (4) 1 crcw08054642 vishay dale output voltage:1.5v; 46.4k ? resistor, size 0805 (4) 1 r2 crcw08058253 vishay dale output voltage:1.25v; 825k ? resistor, size 0805 (4) 1 r3 crcw080549r9 f vishay dale 49.9 ? resistor, size 0805 1 q1 si4433dy vishay siliconix (5) p-channel mosfet so-8 1 u1 MIC5159bm6/ym6 micrel, inc. (6) programmable current limit cap ldo regulator 1 notes: 1. murata tel: 949-916-4000 2. tdk tel: 1-888-835-6646 3. vishay dale tel: 402-563-6866 4. to calculate other output voltage values: 1 1.235 out v r1 r2 ? = ? ? ? ? ? ? ? ? 5. vishay siliconix tel: 402-563-6866 6. micrel, inc. tel: 408-944-0800
micrel, inc. MIC5159 june 2006 15 m9999-062706 schematic d input/output combination examples input output maximum current 3.3v 2.5v 2.5a 3.3v 1.8v 1.25a 3.3v 1.5v 1a 3.3v 1.25v 0.75a 2.5v 1.8v 2.5a 2.5v 1.5v 2a 2.5v 1.25v 1.5a 1.8v 1.5v 2a 1.8v 1.25v 3a u1 MIC5159bm6/ym6 0 1 2 3 4 5 6 01234 input?output voltage (v) output current (a) dropout max. power dissipation at 60c t a application circuit si34433dy x2 soa bill of materials item part number manufacturer description qty. grm40 x7r 106 6.3 murata (1) 10f, 6.3v ceramic mlcc, size 0805 1 c1 c2012x5rr0j106m tdk (2) 10f, 6.3v ceramic mlcc, size 0805 grm42-2 x5r 226k 6.3 murata 22f, 6.3v ceramic mlcc, size 1210 1 c2 c3225x5r1a226m tdk 22f, 10v ceramic mlcc, size 1210 r1 crcw08051002 vishay dale (3) 10k ? resistor, size 0805 1 crcw08059761 vishay dale ou tput voltage:2.3v; 9.76k ? resistor, size 0805 (4) 1 crcw08052152 vishay dale ou tput voltage:1.8v; 21.5k ? resistor, size 0805 (4) 1 crcw08054642 vishay dale ou tput voltage:1.5v; 46.4k ? resistor, size 0805 (4) 1 r2 crcw08058253 vishay dale output voltage:1.25v; 825k ? resistor, size 0805 (4) 1 r3 crcw080549r9 f vishay dale 49.9 ? resistor, size 0805 1 q1, q2 si4433dy vishay siliconix (5) p-channel mosfet so-8 2 u1 MIC5159bm6/ym6 micrel, inc. (6) programmable current limit cap ldo regulator 1 notes: 1. murata tel: 949-916-4000 2. tdk tel: 1-888-835-6646 3. vishay dale tel: 402-563-6866 4. to calculate other output voltage values: 1 1.235 out v r1 r2 ? = ? ? ? ? ? ? ? ? 5. vishay siliconix tel: 402-563-6866 6. micrel, inc. tel: 408-944-0800
micrel, inc. MIC5159 june 2006 16 m9999-062706 schematic e input/output combination examples input output maximum current 3.3v 2.5v 3.5a 3.3v 1.8v 2a 3.3v 1.5v 1.5a 3.3v 1.25v 1.25a 2.5v 1.8v 4a 2.5v 1.5v 3a 2.5v 1.25v 2a 1.8v 1.25v 4.5a u1 MIC5159bm6/ym6 0 1 2 3 4 5 6 0123456 input?output voltage (v) output current (a) dropout max. power dissipation at 60c t a application circuit si34433dy x3 soa bill of materials item part number manufacturer description qty. grm40 x7r 106 6.3 murata (1) 10f, 6.3v ceramic mlcc, size 0805 1 c1 c2012x5rr0j106m tdk (2) 10f, 6.3v ceramic mlcc, size 0805 grm42-2 x5r 226k 6.3 murata 22f, 6.3v ceramic mlcc, size 1210 1 c2 c3225x5r1a226m tdk 22f, 10v ceramic mlcc, size 1210 r1 crcw08051002 vishay dale (3) 10k ? resistor, size 0805 1 crcw08059761 vishay dale ou tput voltage:2.5v; 9.76k ? resistor, size 0805 (4) 1 crcw08052152 vishay dale ou tput voltage:1.8v; 21.5k ? resistor, size 0805 (4) 1 crcw08054642 vishay dale ou tput voltage:1.5v; 46.4k ? resistor, size 0805 (4) 1 r2 crcw08058253 vishay dale output voltage:1.25v; 825k ? resistor, size 0805 (4) 1 r3 crcw080549r9 f vishay dale 49.9 ? resistor, size 0805 1 q1,q2, q3 si4433dy vishay siliconix (5) p-channel mosfet so-8 3 u1 MIC5159bm6/ym6 micrel, inc. (6) programmable current limit cap ldo regulator 1 notes: 1. murata tel: 949-916-4000 2. tdk tel: 1-888-835-6646 3. vishay dale tel: 402-563-6866 4. to calculate other output voltage values: 1 1.235 out v r1 r2 ? = ? ? ? ? ? ? ? ? 5. vishay siliconix tel: 402-563-6866 6. micrel, inc. tel: 408-944-0800
micrel, inc. MIC5159 june 2006 17 m9999-062706 schematic f input/output combination examples input output maximum current 3.3v 2.5v 5a 3.3v 1.8v 2.5a 3.3v 1.5v 2a 3.3v 1.25v 1.75a 2.5v 1.8v 5.5a 2.5v 1.5v 4a 2.5v 1.25v 3a 1.8v 1.25v 6.5a u1 MIC5159bm6/ym6 0 1 2 3 4 5 6 02468 input?output voltage (v) output current (a) dropout max. power dissipation at 60c t a application circuit si34433dy x4 soa bill of materials item part number manufacturer description qty. grm40 x7r 106 6.3 murata (1) 10f, 6.3v ceramic mlcc, size 0805 1 c1 c2012x5rr0j106m tdk (2) 10f, 6.3v ceramic mlcc, size 0805 grm42-2 x5r 226k 6.3 murata 22f, 6.3v ceramic mlcc, size 1210 1 c2 c3225x5r1a226m tdk 22f, 10v ceramic mlcc, size 1210 r1 crcw08051002 vishay dale (3) 10k ? resistor, size 0805 1 crcw08059761 vishay dale ou tput voltage:2.5v; 9.76k ? resistor, size 0805(4) 1 crcw08052152 vishay dale ou tput voltage:1.8v; 21.5k ? resistor, size 0805(4) 1 crcw08054642 vishay dale ou tput voltage:1.5v; 46.4k ? resistor, size 0805(4) 1 r2 crcw08058253 vishay dale output voltage:1.25v; 825k ? resistor, size 0805(4) 1 r3 crcw080549r9 f vishay dale 49.9 ? resistor, size 0805 1 q1,q2, q3,q4 si4433dy vishay siliconix (5) p-channel mosfet so-8 4 u1 MIC5159bm6/ym6 micrel, inc. (6) programmable current limit cap ldo regulator 1 notes: 1. murata tel: 949-916-4000 2. tdk tel: 1-888-835-6646 3. vishay dale tel: 402-563-6866 4. to calculate other output voltage values: 1 1.235 out v r1 r2 ? = ? ? ? ? ? ? ? ? 5. vishay siliconix tel: 402-563-6866 6. micrel, inc. tel: 408-944-0800
micrel, inc. MIC5159 june 2006 18 m9999-062706 schematic g input/output combination examples input output maximum current 1.8v 1.5v 6a u1 MIC5159bm6/ym6 0 1 2 3 4 5 6 012345678910 input?output voltage (v) output current (a) dropout max. power dissipation at 60c t a application circuit si34403dy x2 soa bill of materials item part number manufacturer description qty. grm40 x7r 106 6.3 murata (1) 10f, 6.3v ceramic mlcc, size 0805 1 c1 c2012x5rr0j106m tdk (2) 10f, 6.3v ceramic mlcc, size 0805 c2,c3 grm43 er60j476k murata 47f, 6.3v ceramic mlcc, size 1812 1 c4,c5,c6 c4532x5r0j476m tdk 47f, 6.3v ceramic mlcc, size 1812 r1 crcw08051002 vishay dale (3) 10k ? resistor, size 0805 1 crcw08059761 vishay dale output voltage:2.5v; 9.76k ? resistor, size 0805 (4) 1 crcw08052152 vishay dale output voltage:1.8v; 21.5k ? resistor, size 0805 (4) 1 crcw08054642 vishay dale output voltage:1.5v; 46.4k ? resistor, size 0805 (4) 1 r2 crcw08058253 vishay dale output voltage:1.25v; 825k ? resistor, size 0805 (4) 1 r3 crcw080549r9 f vishay dale 49.9 ? resistor, size 0805 1 q1,q2 si4403dy vishay siliconix (5) p-channel mosfet so-8 2 u1 MIC5159bm6/ym6 micrel, inc. (6) programmable current limit cap ldo regulator 1 notes: 1. murata tel: 949-916-4000 2. tdk tel: 1-888-835-6646 3. vishay dale tel: 402-563-6866 4. to calculate other output voltage values: 1 1.235 out v r1 r2 ? = ? ? ? ? ? ? ? ? 5. vishay siliconix tel: 402-563-6866 6. micrel, inc. tel: 408-944-0800
micrel, inc. MIC5159 june 2006 19 m9999-062706 schematic h input/output combination examples input output maximum current 3.3v 2.5v 2.5a 3.3v 1.8v 1.25a 3.3v 1.5v 1a 3.3v 1.25v 0.75a 2.5v 1.8v 2.5a 2.5v 1.5v 2a 2.5v 1.25v 1.5a 1.8v 1.25v 3a u1 MIC5159bm6/ym6 0 1 2 3 4 5 6 0 0.5 1 1.5 2 2.5 3 3.5 4 input?output voltage (v) output current (a) dropout max. power dissipation at 60c t a application circuit sub15p01-52 soa bill of materials item part number manufacturer description qty. c1 grm40 x7r 106 6.3 murata (1) 10f, 6.3v ceramic mlcc, size 0805 1 c2 c2012x5rr0j106m tdk (2) 10f, 6.3v ceramic mlcc, size 0805 1 r1 crcw08051002 vishay dale (3) 10k ? resistor, size 0805 1 crcw08059761 vishay dale output voltage:2.5v; 9.76k ? resistor, size 0805 (4) 1 crcw08052152 vishay dale output voltage:1.8v; 21.5k ? resistor, size 0805 (4) 1 crcw08054642 vishay dale output voltage:1.5v; 46.4k ? resistor, size 0805 (4) 1 r2 crcw08058253 vishay dale output voltage:1.25v; 825k ? resistor, size 0805 (4) 1 r3 crcw080549r9 f vishay dale 49.9 ? resistor, size 0805 1 q1 sub15p01-52 vishay siliconix (5) p-channel mosfet to-263 1 u1 MIC5159bm6/ym6 micrel, inc. (6) programmable current limit cap ldo regulator 1 notes: 1. murata tel: 949-916-4000 2. tdk tel: 1-888-835-6646 3. vishay dale tel: 402-563-6866 4. to calculate other output voltage values: 1 1.235 out v r1 r2 ? = ? ? ? ? ? ? ? ? 5. vishay siliconix tel: 402-563-6866 6. micrel, inc. tel: 408-944-0800
micrel, inc. MIC5159 june 2006 20 m9999-062706 schematic i input/output combination examples input output maximum current 3.3v 2.5v 5a 3.3v 1.8v 2.5a 3.3v 1.5v 2a 3.3v 1.25v 1.75a 2.5v 1.8v 5.5a 2.5v 1.5v 4a 2.5v 1.25v 3a 1.8v 1.25v 6.5a u1 MIC5159bm6/ym6 0 1 2 3 4 5 6 012345678 input?output voltage (v) output current (a) dropout max. power dissipation at 60c t a application circuit sub15p01-52 x2 soa bill of materials item part number manufacturer description qty. c1 grm40 x7r 106 6.3 murata (1) 10f, 6.3v ceramic mlcc, size 0805 1 c2012x5rr0j106m tdk (2) 10f, 6.3v ceramic mlcc, size 0805 c2 grm42-2 x5r 226k 6.3 murata 22f, 6.3v ceramic mlcc, size 1210 1 c3225x5r1a226m tdk 22f, 10v ceramic mlcc, size 1210 r1 crcw08051002 vishay dale (3) 10k ? resistor, size 0805 1 r2 crcw08059761 vishay dale output voltage:2.5v; 9.76k ? resistor, size 0805 (4) 1 crcw08052152 vishay dale output voltage:1.8v; 21.5k ? resistor, size 0805 (4) 1 crcw08054642 vishay dale output voltage:1.5v; 46.4k ? resistor, size 0805 (4) 1 crcw08058253 vishay dale output voltage:1.25v; 825k ? resistor, size 0805 (4) 1 r3 crcw080549r9 f vishay dale 49.9 ? resistor, size 0805 1 q1,q2 sub15p01-52 vishay siliconix (5) p-channel mosfet to-263 2 u1 MIC5159bm6/ym6 micrel, inc. (6) programmable current limit cap ldo regulator 1 notes: 1. murata tel: 949-916-4000 2. tdk tel: 1-888-835-6646 3. vishay dale tel: 402-563-6866 4. to calculate other output voltage values: 1 1.235 out v r1 r2 ? = ? ? ? ? ? ? ? ? 5. vishay siliconix tel: 402-563-6866 6. micrel, inc. tel: 408-944-0800
micrel, inc. MIC5159 june 2006 21 m9999-062706 schematic j input/output combination examples input output maximum current 3.3v 2.5v 7.5a 3.3v 1.8v 3.75a 3.3v 1.5v 3a 3.3v 1.25v 2.75a 2.5v 1.8v 8a 2.5v 1.5v 6a 2.5v 1.25v 4.5a 1.8v 1.25v 9.5a u1 MIC5159bm6/ym6 0 1 2 3 4 5 6 024681012 input?output voltage (v) output current (a) dropout max. power dissipation at 60c t a application circuit sub15p01-52 x3 soa bill of materials item part number manufacturer description qty. c1 grm40 x7r 106 6.3 murata (1) 10f, 6.3v ceramic mlcc, size 0805 1 c2012x5rr0j106m tdk (2) 10f, 6.3v ceramic mlcc, size 0805 c2, c3 grm42-2 x5r 226k 6.3 murata 22f, 6.3v ceramic mlcc, size 1210 1 c3225x5r1a226m tdk 22f, 10v ceramic mlcc, size 1210 r1 crcw08051002 vishay dale (3) 10k ? resistor, size 0805 1 r2 crcw08059761 vishay dale output voltage:2.5v; 9.76k ? resistor, size 0805 (4) 1 crcw08052152 vishay dale output voltage:1.8v; 21.5k ? resistor, size 0805 (4) 1 crcw08054642 vishay dale output voltage:1.5v; 46.4k ? resistor, size 0805 (4) 1 crcw08058253 vishay dale output voltage:1.25v; 825k ? resistor, size 0805 (4) 1 r3 crcw080549r9 f vishay dale 49.9 ? resistor, size 0805 1 q1,q2 q3 sub15p01-52 vishay siliconix (5) p-channel mosfet to-263 3 u1 MIC5159bm6/ym6 micrel, inc. (6) programmable current limit cap ldo regulator 1 notes: 1. murata tel: 949-916-4000 2. tdk tel: 1-888-835-6646 3. vishay dale tel: 402-563-6866 4. to calculate other output voltage values: 1 1.235 out v r1 r2 ? = ? ? ? ? ? ? ? ? 5. vishay siliconix tel: 402-563-6866 6. micrel, inc. tel: 408-944-0800
micrel, inc. MIC5159 june 2006 22 m9999-062706 schematic k input/output combination examples input output maximum current 3.3v 2.5v 10a 3.3v 1.8v 5a 3.3v 1.5v 4.25a 3.3v 1.25v 3.75a 2.5v 1.8v 11a 2.5v 1.5v 8a 2.5v 1.25v 6a 1.8v 1.5v 7a 1.8v 1.25v 13a u1 MIC5159bm6/ym6 0 1 2 3 4 5 6 0 2.5 5 7.5 10 12.5 15 input?output voltage (v) output current (a) dropout max. power dissipation at 60c t a application circuit sub15p01-52 x4 soa bill of materials item part number manufacturer description qty. c1 grm40 x7r 106 6.3 murata (1) 10f, 6.3v ceramic mlcc, size 0805 1 c2012x5rr0j106m tdk (2) 10f, 6.3v ceramic mlcc, size 0805 c2, c3 grm42-2 x5r 226k 6.3 murata 22f, 6.3v ceramic mlcc, size 1210 2 c3225x5r1a226m tdk 22f, 10v ceramic mlcc, size 1210 r1 crcw08051002 vishay dale (3) 10k ? resistor, size 0805 1 r2 crcw08059761 vishay dale output voltage:2.5v; 9.76k ? resistor, size 0805 (4) 1 crcw08052152 vishay dale output voltage:1.8v; 21.5k ? resistor, size 0805 (4) 1 crcw08054642 vishay dale output voltage:1.5v; 46.4k ? resistor, size 0805 (4) 1 crcw08058253 vishay dale output voltage:1.25v; 825k ? resistor, size 0805 (4) 1 r3 crcw080549r9 f vishay dale 49.9 ? resistor, size 0805 1 q1, q2 q3, q4 sub15p01-52 vishay siliconix (5) p-channel mosfet to-263 4 u1 MIC5159bm6/ym6 micrel, inc. (6) programmable current limit cap ldo regulator 1 notes: 1. murata tel: 949-916-4000 2. tdk tel: 1-888-835-6646 3. vishay dale tel: 402-563-6866 4. to calculate other output voltage values: 1 1.235 out v r1 r2 ? = ? ? ? ? ? ? ? ? 5. vishay siliconix tel: 402-563-6866 6. micrel, inc. tel: 408-944-0800
micrel, inc. MIC5159 june 2006 23 m9999-062706 package information 6-pin sot-23 (m6) micrel, inc. 2180 fortune drive san jose, ca 95131 usa tel +1 (408) 944-0800 fax +1 (408) 474-1000 web http:/www.micrel.com the information furnished by micrel in this data sheet is belie ved to be accurate and reliable. however, no responsibility is a ssumed by micrel for its use. micrel reserves the right to change circuitry and specifications at any time without notification to the customer. micrel products are not designed or authori zed for use as components in life support app liances, devices or systems where malfu nction of a product can reasonably be expected to result in personal injury. life suppo rt devices or systems are devices or systems that (a) are in tended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significan t injury to the user. a purchaser?s use or sale of micrel produc ts for use in life support app liances, devices or systems is a purchaser?s own risk and purchaser agrees to fully indemnify micrel for any damages resulting from such use or sale. ? 2004 micrel, incorporated.

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