low dropout dual voltage regulator the lm2935 is a dual positive 5.0 v low dropout voltage regulator, designed for standby power systems. the main output is capable of supplying 750 ma for microprocessor power, and can be turned aono and aoffo by the switch/reset input. the other output is dedicated for standby operation of volatile memory, and is capable of supplying up to 10 ma loads. the total device features a low quiescent current of 3.0 ma or less when supplying 10 ma from the standby output. this part was designed for harsh automotive environments and is therefore immune to many input supply voltage problems such as reverse battery (12 v), double battery (+24 v), and load dump transients (+60 v). ? two regulated 5.0 v outputs ? main output current in excess of 750 ma ? on/off control of main output ? standby output current in excess of 10 ma ? low input/output differential of less than 0.6 v at 500 ma ? short circuit current limiting ? internal thermal shutdown ? low voltage indicator output ? designed for automotive environment including ? reverse battery protection ? double battery protection ? load dump protection ? reverse transient protection ? economical 5lead to220 package with two optional leadforms ? also available in surface mount d 2 pak package ordering information device operating temperature range package lm2935d2t surface mount lm2935t t =40 to +125 c plastic power lm2935th t j = 40 to +125 c horizontal mount lm2935tv vertical mount on semiconductor ? semiconductor components industries, llc, 2001 april, 2001 rev. 2 1 publication order number: lm2935/d lm2935 semiconductor technical data low dropout dual voltage regulator 1 5 tv suffix plastic package case 314b t suffix plastic package case 314d th suffix plastic package case 314a heatsink surface connected to pin 3. 5 1 d2t suffix plastic package case 936a (d 2 pak) pin 1. input voltage/v cc 2. main output 3. ground 4. switch/reset 5. standby/output heatsink surface (shown as terminal 6 in case outline drawing) is connected to pin 3. 5 1 5 1
lm2935 http://onsemi.com 2 *the main output is off" with switch s1 open. an input bypass capacitor is recommended if the regulator is located more than 4 from the supply input filter. the lm2935 is not internally compensated and thus requires an external output capacitor for stability. a minimum capacitance of 10 m f is recommended. the actual capacitance value is dependent upon load current, temperature, and the capacitor's equivalent series resistance (esr). the least stable condition is encountered at maximum load current and minimum ambient temperature. v in s1* 0.1 input switch/ reset gnd 3 1 4 standby main output 2 20 k lm2935 5.0 v/750 ma + 10 typical application circuit this device contains 29 active transistors. 5 5.0 v/10 ma + 10 maximum ratings rating symbol value unit input voltage continuous v i 60 vdc transient reverse polarity input voltage 1.0% duty cycle, t 100 ms v i ( t ) 50 vpk switch/reset input current i in 5.0 ma power dissipation case 314a, 314b and 314d (to220 type) t a = 25 c p d internally limited w thermal resistance, junctiontoambient r q ja 65 c/w thermal resistance, junctiontocase r q jc 5.0 c/w case 936a (d 2 pak) t a = 25 c p d internally limited w thermal resistance, junctiontoambient r q ja per figure 1 c/w thermal resistance, junctiontocase r q jc 5.0 c/w operating junction temperature range t j 40 to +150 c storage temperature range t stg 65 to +150 c electrical characteristics (v in = 14 v, i o = 500 ma, i stby = 0 ma, c o = 10 m f, c stby = 10 m f, t j = 25 c [note 1].) characteristic symbol min typ max unit main output output voltage (v in = 6.0 v to 26 v, i o = 5.0 ma to 500 ma, t j = 40 to +125 c) v o 4.75 5.0 5.25 v line regulation v in = 9.0 v to 16 v, i o = 5.0 ma v in = 6.0 v to 26 v, i o = 5.0 ma reg line 4.0 10 25 50 mv load regulation (i o = 5.0 ma to 500 ma) reg load 10 50 mv output impedance i o = 500 madc and 10 marms, f = 100 hz to 10 khz z o 200 m w output noise voltage (f = 10 hz to 100 khz) v n 100 m vrms long term stability s 20 mv/khr
lm2935 http://onsemi.com 3 electrical characteristics (v in = 14 v, i o = 500 ma, i stby = 0 ma, c o = 10 m f, c stby = 10 m f, t j = 25 c [note 1].) characteristic unit max typ min symbol main output (continued) ripple rejection (f = 120 hz) rr 66 db dropout voltage i o = 500 ma i o = 750 ma v i v o 0.45 0.82 0.6 v short circuit current limit i sc 0.75 1.2 a overvoltage shutdown threshold v th(ov) 26 31 v switch/reset output sink current (v ol = 1.2 v) i sink 5.0 ma output voltage (r on/off = 20 k w ) low state, v in = 4.0 v high state, v in = 14 v v ol v oh 4.5 0.9 5.0 1.2 6.0 v output pullup resistor, aono/aoffo (note 2) r on/off 20 30 k w output voltage with reverse polarity input (v in = 15 v, r l = 10 w ) v o 0.6 0 v electrical characteristics (v in = 14 v, i o = 0 ma, i stby = 10 ma, c o = 10 m f, c stby = 10 m f, t j = 25 c [note 1].) characteristic symbol min typ max unit standby output output voltage (v in = 6.0 v to 26 v, i stby = 1.0 ma to 10 ma, t j = 40 to +125 c) v o(stby) 4.75 5.0 5.25 v tracking voltage v o v o(stby) 200 0 200 mv line regulation (v in = 6.0 v to 26 v) reg line 4.0 50 mv load regulation (i stby = 1.0 ma to 10 ma) reg load 10 50 mv output impedance i (stby) = 10 madc and 1.0 marms, f = 100 hz to 10 khz z o(stby) 1.0 w output noise voltage (f = 10 hz to 100 khz) v n 300 m vrms long term stability s 20 mv/khr ripple rejection (f = 120 hz) rr 66 db dropout voltage (i stby = 10 ma) v i v o(stby) 0.55 0.7 v short circuit current limit i sc 25 70 ma output voltage with reverse polarity input v in = 15 v, r l = 510 w v o 0.3 0 v output voltage with maximum positive input v in = 60 v, r l = 510 w v o(max) 5.0 6.0 v total device bias current i o = 10 ma, i stby = 0 ma i o = 500 ma, i stby = 0 ma i o = 750 ma, i stby = 0 ma main output aoffo, i stby = 10 ma i b 3.0 40 90 2.0 100 3.0 ma notes: 1. low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible. 2. the maximum switch/reset current must not exceed 5.0 ma.
lm2935 http://onsemi.com 4 v in , input voltage (pin 1) s1, on"/off" switch v o , main output voltage (pin 2) reset (pin 4) v stby , standby voltage (pin 5) open main output turn on" load dump low input voltage input voltage line noise main output short circuit thermal shutdown main output turn off" open closed 60 v 14 v 3.0 v 5.0 v 2.4 v 0 v 9.0 v 14 v 14 v 5.0 v 5.0 v 5.0 v 5.0 v 5.0 v 5.0 v 5.0 v 0 v 2.4 v 26 v typical circuit waveforms r , thermal resistance ja q junction-to-air ( c/w) 30 40 50 60 70 80 1.0 1.5 2.0 2.5 3.0 3.5 0102030 25 15 5.0 l, length of copper (mm) p d(max) for t a = 50 c minimum size pad 2.0 oz. copper l l ???? ???? ???? ???? free air mounted vertically p d , maximum power dissipation (w) r q ja figure 1. d 2 pak thermal resistance and maximum power dissipation versus p.c.b. copper length
lm2935 http://onsemi.com 5 package dimensions th suffix plastic package case 314a03 issue e notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: inch. 3. dimension d does not include interconnect bar (dambar) protrusion. dimension d including protrusion shall not exceed 0.043 (1.092) maximum. dim a min max min max millimeters 0.572 0.613 14.529 15.570 inches b 0.390 0.415 9.906 10.541 c 0.170 0.180 4.318 4.572 d 0.025 0.038 0.635 0.965 e 0.048 0.055 1.219 1.397 f 0.570 0.585 14.478 14.859 g 0.067 bsc 1.702 bsc j 0.015 0.025 0.381 0.635 k 0.730 0.745 18.542 18.923 l 0.320 0.365 8.128 9.271 q 0.140 0.153 3.556 3.886 s 0.210 0.260 5.334 6.604 u 0.468 0.505 11.888 12.827 t seating plane l s e c f k j optional chamfer 5x d 5x m p m 0.014 (0.356) t g a u b q p tv suffix plastic package case 314b05 issue j v q k f u a b g p m 0.10 (0.254) p m t 5x j m 0.24 (0.610) t optional chamfer s l w e c h n t seating plane notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: inch. 3. dimension d does not include interconnect bar (dambar) protrusion. dimension d including protrusion shall not exceed 0.043 (1.092) maximum. dim min max min max millimeters inches a 0.572 0.613 14.529 15.570 b 0.390 0.415 9.906 10.541 c 0.170 0.180 4.318 4.572 d 0.025 0.038 0.635 0.965 e 0.048 0.055 1.219 1.397 f 0.850 0.935 21.590 23.749 g 0.067 bsc 1.702 bsc h 0.166 bsc 4.216 bsc j 0.015 0.025 0.381 0.635 k 0.900 1.100 22.860 27.940 l 0.320 0.365 8.128 9.271 n 0.320 bsc 8.128 bsc q 0.140 0.153 3.556 3.886 s --- 0.620 --- 15.748 u 0.468 0.505 11.888 12.827 v --- 0.735 --- 18.669 w 0.090 0.110 2.286 2.794 5x d
lm2935 http://onsemi.com 6 package dimensions t suffix plastic package case 314d04 issue e q 12345 u k d g a b 5 pl j h l e c m q m 0.356 (0.014) t seating plane t dim min max min max millimeters inches a 0.572 0.613 14.529 15.570 b 0.390 0.415 9.906 10.541 c 0.170 0.180 4.318 4.572 d 0.025 0.038 0.635 0.965 e 0.048 0.055 1.219 1.397 g 0.067 bsc 1.702 bsc h 0.087 0.112 2.210 2.845 j 0.015 0.025 0.381 0.635 k 0.990 1.045 25.146 26.543 l 0.320 0.365 8.128 9.271 q 0.140 0.153 3.556 3.886 u 0.105 0.117 2.667 2.972 notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: inch. 3. dimension d does not include interconnect bar (dambar) protrusion. dimension d including protrusion shall not exceed 10.92 (0.043) maximum. d2t suffix plastic package case 936a02 (d 2 pak) issue b 5 ref a 123 k b s h d g c e m l p n r v u terminal 6 notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: inch. 3. tab contour optional within dimensions a and k. 4. dimensions u and v establish a minimum mounting surface for terminal 6. 5. dimensions a and b do not include mold flash or gate protrusions. mold flash and gate protrusions not to exceed 0.025 (0.635) maximum. dim a min max min max millimeters 0.386 0.403 9.804 10.236 inches b 0.356 0.368 9.042 9.347 c 0.170 0.180 4.318 4.572 d 0.026 0.036 0.660 0.914 e 0.045 0.055 1.143 1.397 g 0.067 bsc 1.702 bsc h 0.539 0.579 13.691 14.707 k 0.050 ref 1.270 ref l 0.000 0.010 0.000 0.254 m 0.088 0.102 2.235 2.591 n 0.018 0.026 0.457 0.660 p 0.058 0.078 1.473 1.981 r 5 ref s 0.116 ref 2.946 ref u 0.200 min 5.080 min v 0.250 min 6.350 min 45 m 0.010 (0.254) t t optional chamfer
lm2935 http://onsemi.com 7 notes
lm2935 http://onsemi.com 8 on semiconductor and are trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to make changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. atypicalo parameters which may be provided in scill c data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating parameters, including atypicalso must be validated for each customer application by customer's technical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body , or other applications intended to support or sustain life, or for any other application in which the failure of the scillc product could create a sit uation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthori zed use, even if such claim alleges that scillc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. publication ordering information central/south america: spanish phone : 3033087143 (monfri 8:00am to 5:00pm mst) email : onlitspanish@hibbertco.com tollfree from mexico: dial 018002882872 for access then dial 8662979322 asia/pacific : ldc for on semiconductor asia support phone : 13036752121 (tuefri 9:00am to 1:00pm, hong kong time) toll free from hong kong & singapore: 00180044223781 email : onlitasia@hibbertco.com japan : on semiconductor, japan customer focus center 4321 nishigotanda, shinagawaku, tokyo, japan 1410031 phone : 81357402700 email : r14525@onsemi.com on semiconductor website : http://onsemi.com for additional information, please contact your local sales representative. lm2935/d north america literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 3036752175 or 8003443860 toll free usa/canada fax : 3036752176 or 8003443867 toll free usa/canada email : onlit@hibbertco.com fax response line: 3036752167 or 8003443810 toll free usa/canada n. american technical support : 8002829855 toll free usa/canada europe: ldc for on semiconductor european support german phone : (+1) 3033087140 (monfri 2:30pm to 7:00pm cet) email : onlitgerman@hibbertco.com french phone : (+1) 3033087141 (monfri 2:00pm to 7:00pm cet) email : onlitfrench@hibbertco.com english phone : (+1) 3033087142 (monfri 12:00pm to 5:00pm gmt) email : onlit@hibbertco.com european tollfree access*: 0080044223781 *available from germany, france, italy, uk, ireland
|
