 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| 1 date: 1/19/05 sp6648 ultra-low quiescent current, high efficiency boost regulator ?copyright 2005 sipex corporation sp6648 features ultra-low 12 a quiescent current 400ma output current at 2.6v input: 3.3v out 94% efficiency from 2 cell to 3.3v out wide input voltage range: 0.95v to 4.5v 3.3v fixed or adjustable output integrated synchronous rectifier: 0.3 ? 0.3 ? switch anti-ringing switch technology programmable inductor peak current logic shutdown control under voltage lock-out at 0.61v programmable low battery detect single or dual cell alkaline small 10 pin dfn package and industry standard 10 pin msop ultra-low quiescent current, high efficiency boost regulator applications camera flash led driver wireless mouse pda's pagers medical monitors handheld portable devices mp3 players description the sp6648 is an ultra-low quiescent current, high efficiency step-up dc-dc converter ideal for single cell, dual cell alkaline and li-ion battery applications such as digital still cameras, pda?, mp3 players, and other portable devices. the sp6648 combines the high delivery associated with pwm control, and the low quiescent current and excellent light-load efficiency of pfm control. the sp6648 features 12 a quiescent current, synchronous rectification, a 0.3 ? charging switch, anti-ringing inductor switch, programmable low battery detect, under-voltage lockout and programmable inductor peak current. the device can be controlled by a 1na active low shutdown pin. 205k 10 h 3.3v out v batt 47 f sp6648 v batt lbon r lim shdn fb lx lbi v out p gnd gnd 47pf 47 f 1 f + 10 9 8 7 6 + lbi shdn 1.87k 1 2 3 4 5 lbon 124k typical application circuit 0 50 100 150 200 250 300 350 400 450 500 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 v in (v) io (ma) v out=3.3v, ipk=0.85a v out=5.0v, ipk=0.85a maximum load current in operation sp6648 10 pin dfn 10 9 8 7 6 1 2 3 4 5 v batt lbi lbon r lim shdn v out lx p gnd gnd fb now available in lead free packaging
2 date: 1/19/05 sp6648 ultra-low quiescent current, high efficiency boost regulator ?copyright 2005 sipex corporation lx, vo, v batt , lbon, fb to gnd pin ................................ -0.3 to 6.0v shdn, lbi ........................................................... -0.3v to v batt +1.0v vo, gnd, lx current ....................................................................... 2a reverse v batt current .............................................................. 220ma forward v batt current .............................................................. 500ma storage temperature .................................................. -65 c to 150 c parameter min typ max units ? conditions input voltage operating range, v batt 0.7 4.5 v ? after startup output voltage range, v out 2.5 5.5 v ? start-up input voltage, v batt 0.85 1.1 v ? r load = 3k ? under voltage lock-out/uvlo 0.5 0.61 0.7 v ? output voltage, v o 3.12 3.30 3.48 v ? internal feedback divider quiescent current into v o , i qo 12 25 a ? v out = 3.3v, v fb = 1.5v, toggle shdn quiescent current into v batt , i qb 250 750 na ? v out = 3.3v, v fb = 1.5v shutdown current into v o, i sdo 1 500 na ? v shdn = 0v shutdown current into v batt, i sdb 250 750 na ? v shdn = 0v, v batt = 2.6v efficiency 84 % v batt = 1.3v, i out = 100ma, r lim = 2k ? 92 % v batt = 2.6v, i out = 200ma, r lim = 2k ? inductor current limit, i pk = 1600/r lim 650 800 1000 ma ? r lim = 2k ? 1300 1600 2000 ma ? r lim = 1k ? 100 ma v batt = 1.3v, r lim = 4k ? output current 200 ma v batt = 2.6v, r lim = 4k ? 150 ma v batt = 1.3v, r lim =2k ? 400 ma v batt = 2.6v, r lim =2k ? minimum off-time constant k off 0.5 1.0 1.5 v* s ? k off t off (v out - v batt ) maximum on-time constant k on 2.5 4.0 5.5 v* s ? k on t on (v batt ) enable valid to output stable 300 500 si load = 1ma nmos switch resistance 0.30 0.6 ?? i nmos = 100ma pmos switch resistance 0.30 0.6 ?? i pmos = 100ma fb set voltage, v fb 1.19 1.25 1.31 v ? external feedback fb input current 1 100 na ? v fb =1.3v lbi falling trip voltage 0.56 0.61 0.66 v ? lbi hysteresis 25 mv low output voltage for lbon, v ol 0.4 v ? v batt = 1.3v, i sink = 1ma leakage current for lbon 1 a ? v batt = 1.3v, v lbon = 3.3v shdn input voltage, note 1 v il 0.25 ? v batt = 1.3v v ih 1.0 v ? v batt = 1.3v v il 0.5 ? v batt = 2.6v v ih 2.0 ? v batt = 2.6v shdn input current 1 100 na ? lx pin leakage 3 a electrical specifications v batt =v shdn = 2.6v, v fb =0v, i load = 0ma, t amb = -40 c to +85 c, v out = +3.3v, typical values at 27 c unless otherwise noted. the ? denotes the specifications which apply over full operating temperature range -40 c to +85 c, unless otherwise specified. operating temperature ................................................ -40 c to +85 c esd rating ........................................................................ 1.5kv hbm these are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. exposure to absolute maximum rating conditions for extended periods of time may affect reliability. absolute maximum ratings note 1: shdn must transition faster than 1v/100ms for proper operation. 3 date: 1/19/05 sp6648 ultra-low quiescent current, high efficiency boost regulator ?copyright 2005 sipex corporation pin description pin number pin name description 1v batt battery voltage. the startup circuitry is powered by this pin. battery voltage is used to calculate switch off time: t off = k off / (v out - v batt ). when the battery voltage drops below 0.61v the sp6648 goes into an undervoltage lockout mode (uvlo), where the part is shut down. 2 lbi low battery input. lbi below 0.61v causes the sp6648 pin to pull lbon pin down to ground. use a resistor divider to program the low voltage threshold for a specific battery configuration. 3 lbon low battery output not. open drain nmos output that sinks current to ground when lbi is below 0.61v. 4r lim current limit resistor. by connecting a resistor r lim from this pin to ground the inductor peak current is set by i peak =1600/r lim . the range for r lim is 9k ? (for 180ma) to 1.k ? (for 1.6a). 5 shdn shutdown not. tie this pin high to v batt, for normal operation. pull this pin to ground to disable all circuitry inside the chip. in shutdown the output voltage will float down to a diode drop below the battery voltage. 6f b feedback. connect this pin to gnd for fixed +3.3v operation. connect this pin to a resistor voltage divider between v out and gnd for adjustable output operation. 7 gnd ground. connect to ground plane. 8 pgnd power ground. the inductor charging current flows out of this pin. 9l x inductor switching node. connect one terminal of the inductor to the positive terminal of the battery. connect the second terminal of the inductor to this pin. the inductor charging current flows into lx, through the internal charging n-channel fet, and out the pgnd pin. 10 v out output voltage. the inductor current flows out of this pin during switch off-time. it is also used as the internal regulator voltage supply. connect this pin to the positive terminal of the output capacitor. 4 date: 1/19/05 sp6648 ultra-low quiescent current, high efficiency boost regulator ?copyright 2005 sipex corporation theory of operation detailed description the sp6648 is a step-up dc-dc converter that can start up with input voltages as low as 0.85v (typically) and operates with an input voltage down to 0.61v. ultra low quiescent current of 12 a provides excellent efficiency, up to 94%. in addition to the main switch, a 0.3 ? internal mosfet the sp6648 has an internal synchro- nous rectifier, increasing efficiency and reduc- ing the space of an external diode. an internal inductive-damping switch significantly reduces inductive ringing for low noise high efficiency operation. if the supply voltage drops below 0.61v the sp6648 goes into under voltage lock- out, thus opening both internal switches. an externally programmable low battery detector with open drain output provides the ability to flag battery low condition. the inductor peak current is externally programmable to allow for a range of inductor values. control scheme a minimum off-time, current limited pulse fre- quency modulation (pfm) control scheme com- bines the high output power and efficiency of a pulse width modulation (pwm) device with the ultra low quiescent current of the traditional pfm. at low to moderate output loads the pfm control provides higher efficiency than tradi- tional pwm converters are capable of deliver- ing. at these loads the switching frequency is determined by a minimum off-time (t off , min ) and a maximum on-time (t on , max ) where: t off k off / (v out - v batt ) and t on k on / v batt with k off = 1.0v s and k on = 4.0v s. functional diagram v batt shdn v batt v o uvlo 0.61v 0.61v sdi ibias v o sdi internal v batt fb lbi r lim ipkset current control current reference ref fb vo volow sqn charge q r t off charge end iuc qkill lx undercurrent comparator internal supply v o v batt max to n v out qkill pmos nmos lx current reference overcurrent comparator switch ground p gnd gnd lbon internal ground load ref block min t off switch buffer + - c + - c n 0.61v sp6648 + - c + - c + - c 1.25v + - c 5 date: 1/19/05 sp6648 ultra-low quiescent current, high efficiency boost regulator ?copyright 2005 sipex corporation at light loads (as shown in plot a in figure 1 ) the charge cycle will last the maximum value for t on : for a 1v battery this would be as follows: t on = k on / v batt = 4.0v s / 1v = 4.0 s the current built up in the coil during the charge cycle gets fully discharged (discontinuous con- duction mode dcm) when the current in the coil has reached zero the synchronous rectifier switch is opened and the voltage across the coil (from v batt to lx) is shorted internally to eliminate inductive ringing. with increasing load (as shown in plot b in figure 1 ) this inductor damping time becomes shorter, because the output will quickly drop below its regulation point due to heavier load. if the load current increases further the sp6648 enters continuous conduction mode (ccm) where there is always current flowing in the inductor. the charge time remains at maximum t on as long as the inductor peak current limit is not reached as shown in plot c in figure 1 . the inductor peak current limit can be programmed by tying a resistor r lim from the r lim pin to ground where: i peak = 1600 / r lim when the peak current limit is reached the charge time is short-cycled. in plot d of figure 1 , the switch current reaches the peak current limit during the charge period which ends the charge cycle and starts the dis- charge cycle. however, full load is not yet achieved because at the end of the minimum discharge time the output was still within regu- lation. maximum load is reached when this discharge time has shrunk to the minimum allowed value t off as shown in plot e of figure 1 . inductor current vs. load t on max. toff min. e. iripple=toff* (vo - vi)/l llim llim llim llim llim t on max. t on max. t on max. t on max. to ff min. to ff min. to ff min. to ff min. d. toff*= (vo - vi)/l 7 date: 1/19/05 sp6648 ultra-low quiescent current, high efficiency boost regulator ?copyright 2005 sipex corporation typical performance characteristics refer to the typical application circuit on page 1, t amb =+25 c. 0 50 100 150 200 250 300 350 400 450 500 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 v in (v) io (ma) maximum resistive load current in startup, v out =5.0v 0 50 100 150 200 250 300 350 400 1.0 1.5 2.0 2.5 3.0 v in (v) io (ma) v out (ac) inductor current (0.2a/div) output ripple, v in =2.6v, i load =200ma, v out =3.3v v out (ac) inductor current (0.2a/div) output ripple, v in =2.6v, i load =200ma, v out =5.0v 0.0 1.0 2.0 3.0 4.0 5.0 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0 3.3 v in (v) kon (v*usec) 0.0 1.0 2.0 3.0 4.0 5.0 0.9 1.4 1.9 2.4 2.9 3.4 3.9 4.4 4.9 v in (v) kon (v*usec) k on vs. v in , v out =3.3v k on vs. v in , v out =5.0v maximum resistive load current in startup, v out =3.3v 8 date: 1/19/05 sp6648 ultra-low quiescent current, high efficiency boost regulator ?copyright 2005 sipex corporation v out (ac) lx i out (0.5a/div) v out (ac) lx i out (0.2a/div) v in v out i in (1a/div) typical performance characteristics refer to the typical application circuit on page 1, t amb =+25 c. 0.0 0.5 1.0 1.5 2.0 0.9 1.2 1.5 1.8 2.4 2.7 3.0 3.3 v in (v) koff (v*usec) 2.1 0.0 0.5 1.0 1.5 2.0 0.9 1.4 1.9 2.4 2.9 3.4 3.9 4.4 4.9 v in (v) koff (v*usec) startup, v in =2.6v, v out =3.3v, r load = 100 ? startup, v in =4.2v, v out =5.0v, r load = 100 ? k off vs. v in , v out =3.3v k off vs. v in , v out =5.0v v in v out i in (1a/div) load step, 0.1a to 0.3a, v in = 2.6v, v out = 3.3v load step, 0.3a to 0.5a, v in = 4.2v, v out = 5.0v 9 date: 1/19/05 sp6648 ultra-low quiescent current, high efficiency boost regulator ?copyright 2005 sipex corporation circuit layout printed circuit board layout is a critical part of a power supply design. poor designs can result in excessive emi on the feedback paths and on the ground planes with applications involving high switching frequencies and large peak currents. excessive emi can result in instability or regu- lation errors. all power components should be placed on the pc board as closely as possible with the traces kept short, direct, and wide (>50mils or 1.25mm). extra copper on the pc board should be integrated into ground as a pseudo-ground plane. on a multilayer pc board, route the star ground using component-side cop- per fill, then connect it to the internal ground plane using vias. for the sp6648 devices, the inductor and input and output filter capacitors should be soldered with their ground pins as close together as possible in a star-ground con- figuration. the v out pin must be bypassed di- rectly to ground as close to the sp6648 devices as possible (within 0.2in or 5mm). the dc-dc converter and any digital circuitry should be placed on the opposite corner of the pc board as far away from sensitive rf and analog input stages. noisy traces, such as from the lx pin, should be kept away from the voltage-feedback v out node and separated from it using grounded copper to minimize emi. see the sp6648eb evaluation board manual for pc board layout design details. component selection selection of capacitors for sp6648 power sup- ply circuits can be made through the use of the component selection table. capacitor equiva- lent series resistance (esr) in the range of 0.2 ? to 0.3 ? is a requirement for obtaining sufficient output voltage ripple for the sp6648 to properly regulate under load. for esr values in this range, low esr tantalum capacitors are recom- mended. for example, in the sp6648 applica- tion circuit a 47 f, 10v, low-esr, surface- mount tantalum output filter capacitor typically provides 50mv output ripple when stepping up from 2.6v to 3.3v at 200ma. ceramic capaci- tors have esr too low to produce enough output ripple for the sp6648 to regulate the output. designers should select input and output ca- pacitors with a rating exceeding the inductor current ripple, which is typically set by the inductor value and the k on value as given in the following relationship: i l(ripple) = k on /l for the example of the 10 h inductor the induc- tor current ripple would be 330ma, while for the 22 h inductor the inductor current ripple value would be 150ma. do not allow tantalum ca- pacitors to exceed their ripple-current ratings. an input filter capacitor can reduce peak cur- rents drawn from the battery and improve effi- ciency. for most applications, use the same 47 f tantalum capacitor as used for the input. low-esr aluminum electrolytic capacitors are acceptable provided they meet the esr require- ment of 0.2 ? to 0.3 ? , and we list an appropriate 100 f aluminum electrolytic in the component selection table, but standard aluminum electro- lytic capacitors are not recommended. in selecting an inductor, the saturation current specified for the inductor needs to be greater then the sp6648 peak current to avoid saturating the inductor, which would result in a loss in efficiency and could damage the inductor. the sp6648 evaluation board uses a sumida cdrh5d28 10 h inductor with an i sat value of 1.3a and a dcr of 0.065 ? , which easily handles the i peak of 0.85a of the sp6648 and will deliver high efficiencies. other inductors could be selected provided their i sat is greater than the i peak of the sp6648. applications information 10 date: 1/19/05 sp6648 ultra-low quiescent current, high efficiency boost regulator ?copyright 2005 sipex corporation applications information: continued component selection table sp6648eb evaluation board schematic + c1 47f l1 10h c4 1f r 1 205k lbon r 2 124k c3 47pf r lim 1.87k v batt r 4 249k u1 sp6648 v batt 1 lbi 2 r lim 4 shdn 5 fb 6 gnd 7 p gnd 8 lbon 3 lx 9 v out 10 + c2 47f r 3 549k r 5 1.0m 3.3v out inductors - surface mount inductor specification inductance manufacturer/part no. series r i sat size lxwxh intuctor type manufacturer ( h) ? (a) (mm) website 10 sumida cdrh5d28-100 0.065 1.30 5.7x5.5x3.0 shielded ferrite core www.sumida.com 10 tdk rlf5018t-100mr94 0.067 0.94 5.6x5.2x2.0 shielded ferrite core www.tdk.com 10 sumida cd43-100 0.180 1.04 4.0x4.5x3.5 unshileded ferrite core www.sumida.com 22 sumida cdrh5d28-220 0.122 0.90 5.7x5.5x3 shileded ferrite core www.sumida.com 22 tdk rlf5018t-220mr63 0.067 0.63 5.6x5.2x2.0 shielded ferrite core www.tdk.com 22 sumida cd43-220 0.378 0.68 4.0x4.5x3.5 unshielded ferrite core www.sumida.com capacitors - surface mount & leaded capacitor specification capacitance manufacturer part no. esr ripple current size lxwxh voltage capacitor manufacturer ( f) ? (max) (a) @ 85 c (mm) (v) type website 47 kemet t494c476k010as 0.300 1.06 6.0x3.2x2.5 10 smt tantalum www.kemet.com 47 kemet t494v476k010as 0.300 0.99 7.3x4.3x2.0 10 smt tantalum www.kemet.com 100 sanyo 25mv100ax 0.220 0.30 6.3dx11l 25 radial al electrolytic www.sanyovideo.com note: components highlighted in bold are those used on the sp6648eb evaluation board. 11 date: 1/19/05 sp6648 ultra-low quiescent current, high efficiency boost regulator ?copyright 2005 sipex corporation v out programming the sp6648 can be programmed as either a voltage source or a current source. to program the sp6648 as voltage source, the sp6648 re- quires 2 feedback resistors r1 & r2, as shown in the sp6648eb evaluation board schematic, to control the output voltage. to set v out in the voltage mode, use the equation: r1 = [(v out /1.25)-1] * r2 using the r lim function the peak inductor current, i peak , is programmed externally by the r lim resistor connected be- tween the r lim pin and gnd. the peak inductor current is defined by: i peak = 1600/r lim the saturation current specified for the inductor needs to be greater than the peak current to avoid saturating the inductor, which would result in a loss in efficiency and could damage the induc- tor. the sp6648 evaluation board uses a r lim value of 1.87k for an i peak = 850ma to allow the circuit to deliver up to 180ma for 1.3v input and 400ma for 2.6v input. other values could be selected using the above relationships. using the lbon - low battery output function the sp6648 will regulate the output until the input battery is completely discharged or until the under voltage lock-out (uvlo) occurs at v batt = 0.61v. to provide a low battery warn- ing, the low battery output function of the sp6648 can be used. lbon is programmed externally by the r 3 and r 4 resistor divider connected between v batt , the lbi input pin and gnd. the lbon is an open drain output, which is active low and is pulled up by a 1m resistor r 5 to v out . when the lbi comparator falling threshold of 0.61v is reached, the lbon output goes low as determined by the relation- ship: v lowbatt = 0.61 * [(r 3 + r 4 )/r 4 ] the sp6648 evaluation board r 3 & r 4 resistors have been set to trip for a falling battery thresh- old of about 2.0v. using this relationship, other low battery threshold values can be set by the user. uvlo the under voltage lock-out function once started up, the sp6648 will regulate the output until the input battery is completely dis- charged or until the under voltage lock-out (uvlo) occurs at v batt = 0.61v. the uvlo function will completely open all switches until the battery again rises above the 0.61v thresh- old. maximum startup current it should be noted that for low input voltages the sp6648 startup circuit can not support large load currents at startup. in startup the sp6648 needs to boost the output from zero volts using the input voltage. once the output is greater than 1.9v the operate circuit takes over and the sp6648 can supply much more current. curves of maximum load current in startup for the sp6648 are shown in the typical performance characteristics and can be compared with the page one curve for maximum load current in operation. for 1-cell battery applications, it is recommended to apply any large load current after the sp6648 has started up, typically in a few milliseconds. this is typically not a problem in many applica- tions where the load is a processor whose load current is low until the processor voltage comes up. applications information : continued 12 date: 1/19/05 sp6648 ultra-low quiescent current, high efficiency boost regulator ?copyright 2005 sipex corporation applications information sp6648ledeb evaluation board with lumiled high brightness white led for the high brightness lumiled white led application, the sp6648 is generally programmed as a current source. the bias resistor r b is used to set the operating current of the white led as equation: r b = v ref /i f where v ref is around 0.61v, i f is the operating current of the lumiled. to set the operating current to be about 350ma, r b is selected as 1.8 ? as shown in the following schematic. the effi- ciency of the sp6648 lumiled circuit is im- proved by the use of a silicon diode d1 and resistor r 1 to set the voltage at the current sense resistor r 2 to 0.61v instead of the higher 1.25v at the fb pin. an efficiency curve follows showing the sp6648 efficiency driving 350ma output current into the high brightness lumiled. as shown in following scope photos, if the sp6648 is powered up before the lumiled is plugged in, the circuit will bring the feedback pin to 0v and the sp6648 has a feature to set the output voltage to be 3.3v. once the lumiled is plugged in, the feedback pin will go up to 1.25v and begin to regulate. the output voltage will go from 3.3v to 3.68v (=v f +0.61v), where v f is the forward voltage of the lumiled. when the lumiled is open, the feedback pin voltage will go to 0v and the output voltage will go to 3.3v which will protect the part. sp6648ledeb evaluation board schematic sp6648ledeb efficiency curve 60 65 70 75 80 85 90 95 100 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 battery voltage (v) efficiency (%) sp6648 v batt 1 lbi 2 r lim 4 shdn 5 fb 6 gnd 7 p gnd 8 lbon 3 lx 9 v out 10 r 1 16.2k d2 1w led d1 1n4148 rb 1.8? c1 10f c2 10f 1.8-3.2v r 5 (r 5 optional) 10k v ref = 0.61v important: 1f ceramic cap at v out pin needed for stable regulation 350ma i out =0.61v/r b c4 1f l1 10h v batt r lim 1.87k 13 date: 1/19/05 sp6648 ultra-low quiescent current, high efficiency boost regulator ?copyright 2005 sipex corporation brightness control one approach to control led brightness is to apply a pwm signal to the shdn input of the sp6648. in this case, the output current will be equal to the product of 350ma and the average duty cycle at the shdn pin. an optional 10k potentiometer (r 5 ) may also be used for dim- ming the led current by varying the potentiom- eter between low brightness and full brightness. applications information v out v ref v out v ref plug in the lumiled unplug the lumiled pinouts sp6648 10 pin dfn 10 9 8 7 6 1 2 3 4 5 v batt lbi lbon r lim shdn v out lx p gnd gnd fb v batt lbi lbon r lim shdn sp6648 10 pin msop 1 2 3 4 5 10 9 8 7 6 v out lx p gnd v gnd fb 14 date: 1/19/05 sp6648 ultra-low quiescent current, high efficiency boost regulator ?copyright 2005 sipex corporation package: 10 pin msop 1 e1 e pin #1 indentifier must be indicated within this shaded area (d/2 * e1/2) l1 l r1 1 r 1 seating plane gauge plane l2 b b symbol min nom max a-- 1.1 a1 0 - 0.15 a2 0.75 0.85 0.95 b 0.17 - 0.27 c 0.08 - 0.23 d e e1 e e1 l 0.4 0.6 0.8 l1 l2 n-10 - r 0.07 - - r1 0.07 - - ?0o-8o ?1 0o - 15o note: dimensions in (mm) 10 pin msop jedec mo-187 (ba) variation 3.00 bsc 4.90 bsc 3.00 bsc 0.50 bsc 2.00 bsc 0.95 ref 0.25 bsc 1 2 e/2 e1 e d c with plating base metal b section b-b a2 a a1 b 15 date: 1/19/05 sp6648 ultra-low quiescent current, high efficiency boost regulator ?copyright 2005 sipex corporation package: 10 pin dfn symbol min nom max a 0.8 0.9 1 a1 0 0.02 0.05 a2 0.55 0.65 0.8 a3 b 0.18 0.25 0.3 d d2 2.2 2.7 e e e2 1.4 - 1.75 k 0.2 - - l 0.3 0.4 0.5 note: dimensions in (mm) 3x3 10 pin dfn jedec mo-229 (veed-5) variation 0.20 ref 3.00 bsc 3.00 bsc 0.5 pitch bottom view b e l k d2 e2 1 2 t op view d e e/2 d/2 a a3 a1 side view 16 date: 1/19/05 sp6648 ultra-low quiescent current, high efficiency boost regulator ?copyright 2005 sipex corporation corporation analog excellence sipex corporation reserves the right to make changes to any products described herein. sipex does not assume any liability aris ing out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor t he rights of others. sipex corporation headquarters and sales office 233 south hillview drive milpitas, ca 95035 tel: (408) 934-7500 fax: (408) 935-7600 part number top mark operating temperature range package type sp6648eu ................................ sp6648eu..................-40 c to +85 c ...................................... 10 pin msop sp6648eu/tr .......................... sp6648eu..................-40 c to +85 c ..................................... 10 pin msop sp6648er ............................... sp6648eryww..........-40 c to +85 c ........................................ 10 pin dfn sp6648er/tr ......................... sp6648eryww..........-40 c to +85 c ....................................... 10 pin dfn ordering information /tr = tape and reel pack quantity is 2,500 for msop and 3,000 for dfn. available in lead free packaging. to order add "-l" suffix to part number. example: sp6648eu/tr = standard; SP6648EU-L/tr = lead free click here to order samples |
Price & Availability of SP6648EU-L
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |