lm2936-3.0 ultra-low quiescent current 3.0v regulator general description the lm2936-3.0 ultra-low quiescent current regulator fea- tures low dropout voltage and low current in the standby mode. with less than 20 a quiescent current at a 100 a load, the lm2936-3.0 is ideally suited for automotive and other battery operated systems. the lm2936-3.0 retains all of the features that are common to low dropout regulators including a low dropout pnp pass device, short circuit pro- tection, reverse battery protection, and thermal shutdown. the lm2936-3.0 has a 40v maximum operating voltage limit, a ?40?c to +125?c operating temperature range, and 3% output voltage tolerance over the entire output current, input voltage, and temperature range. the lm2936-3.0 is available in a to-92 package, a so-8 surface mount pack- age, as well as sot-223 and to-252 surface mount power packages. features n ultra low quiescent current (i q 20 a for i o = 100 a) n fixed 3.0v, 50 ma output n 2% initial output tolerance n 3% output tolerance over line, load, and temperature n dropout voltage typically 200 mv @ i o =50ma n reverse battery protection n ?50v reverse transient protection n internal short circuit current limit n internal thermal shutdown protection n 40v operating voltage limit n 60v operating voltage limit for lm2936hv n shutdown pin available with lm2936bm package typical application 20001601 * required if regulator is located more than 2" from power supply filter capacitor. * * required for stability. must be rated for 22 f minimum over intended operating temperature range. effective series resistance (esr) is critical, se e curve. locate capacitor as close as possible to the regulator output and ground pins. capacitance may be increased without bound. connection diagrams to-252 sot-223 20001625 top view order number lm2936dt-3.0 see ns package number td03b 20001626 top view order number lm2936mp-3.0 see ns package number ma04a june 2002 lm2936-3.0 ultra-low quiescent current 3.0v regulator ? 2002 national semiconductor corporation ds200016 www.national.com
connection diagrams (continued) 8-pin so (m) to-92 20001606 top view order number lm2936m-3.0, lm2936hvma-3.0 see ns package number m08a 20001602 bottom view order number lm2936z-3.0 see ns package number z03a 8-pin so (m) 8-pin soic (mm) 20001628 top view order number lm2936bm-3.0 see ns package number mo8a 20001629 top view order number lm2936mm-3.0 see ns package number mua08a lm2936-3.0 www.national.com 2
absolute maximum ratings (note 1) if military/aerospace specified devices are required, please contact the national semiconductor sales office/ distributors for availability and specifications. input voltage (survival) +60v, ?50v esd susceptibility (note 2) 2000v power dissipation (note 3) internally limited junction temperature (t jmax ) 150?c storage temperature range ?65?c to +150?c lead temperature (soldering, 10 sec.) 260?c operating ratings operating temperature range ?40?c to +125?c maximum operating input voltage - lm2936 +40v maximum operating input voltage - lm2936hv only +60v maximum shutdown pin voltage - lm2936bm only 0v to 40v mso-8 (mua08a) ja 200?c/w to-92 (z03a) ja 195?c/w so-8 (m08a) ja 140?c/w so-8 (m08a) jc 45?c/w to-252 (td03b) ja 126?c/w to-252 (td03b) jc 6?c/w sot-223 (ma04a) ja 149?c/w sot-223 (ma04a) jc 36?c/w electrical characteristics v in = 14v, i o = 10 ma, t j = 25?c, unless otherwise specified. boldface limits apply over entire operating temperature range parameter conditions min (note 5) typical (note 4) max (note 5) units lm2936hv only output voltage 5.5v v in 48v, 100 a i o 50 ma (note 6) 2.910 3.000 3.090 v line regulation 6v v in 60v, i o = 1ma 10 30 mv all lm2936 output voltage 2.940 3.000 3.060 v 4.0v v in 26v, 100a i o 50ma (note 6) 2.910 3.000 3.090 quiescent current i o = 100 a, 8v v in 24v 15 20 a i o = 10 ma, 8v v in 24v 0.20 0.50 ma i o = 50 ma, 8v v in 24v 1.5 2.5 ma line regulation 9v v in 16v 5 10 mv 6v v in 40v, i o = 1 ma 10 30 load regulation 100 a i o 5ma 10 30 mv 5ma i o 50 ma 10 30 dropout voltage i o = 100 a 0.05 0.10 v i o = 50 ma 0.20 0.40 v short circuit current v o = 0v 65 120 250 ma output impedance i o = 30 madc and 10 marms, 450 m ? f = 1000 hz output noise voltage 10 hz?100 khz 500 v long term stability 20 mv/1000 hr ripple rejection v ripple =1v rms ,f ripple = 120 hz ?40 ?60 db reverse polarity r l = 500 ? , t = 1 ms ?50 ?80 v transient input voltage output voltage with v in = ?15v, r l = 500 ? 0.00 ?0.30 v reverse polarity input maximum line transient r l = 500 ? ,v o 3.30v 60 v output bypass capacitance (c out ) esr c out = 22f 0.1ma i out 50ma 0.3 8 ? lm2936-3.0 www.national.com 3
electrical characteristics (continued) v in = 14v, i o = 10 ma, t j = 25?c, unless otherwise specified. boldface limits apply over entire operating temperature range parameter conditions min (note 5) typical (note 4) max (note 5) units shutdown input - lm2936bm only output voltage, v out output off, v sd = 2.4v 0 0.010 v shutdown high threshold voltage, v ih output off, r load = 500 ? 2.00 1.1 v shutdown low threshold voltage, v il output on, r load = 500 ? 1.1 0.60 v shutdown high current, i ih output off, v sd = 2.4v, r load = 500 ? 12 a quiescent current output off, v sd = 2.4v, r load = 500 ? includes i ih current 30 a note 1: absolute maximum ratings indicate limits beyond which damage to the device may occur. dc and ac electrical specifications do not apply when operating the device beyond its specified operating ratings. note 2: human body model, 100pf discharge through a 1.5k ? resistor. note 3: the maximum power dissipation is a function of t jmax , ja , and t a . the maximum allowable power dissipation at any ambient temperature is p d =(t jmax ?t a )/ ja . if this dissipation is exceeded, the die temperature will rise above 150?c and the lm2936 will go into thermal shutdown. note 4: typicals are at 25?c (unless otherwise specified) and represent the most likely parametric norm. note 5: datasheet min/max specification limits are guaranteed by design, test, or statistical analysis. note 6: to ensure constant junction temperature, pulse testing is used. typical performance characteristics maximum power dissipation (to-92) dropout voltage 20001607 20001608 dropout voltage quiescent current 20001609 20001610 lm2936-3.0 www.national.com 4
typical performance characteristics (continued) quiescent current quiescent current 20001611 20001612 quiescent current quiescent current 20001613 20001614 output capacitor esr peak output current 20001615 20001616 lm2936-3.0 www.national.com 5
typical performance characteristics (continued) peak output current line transient response 20001617 20001619 ripple rejection load transient response 20001621 20001622 output impedance 20001624 applications information unlike other pnp low dropout regulators, the lm2936 re- mains fully operational to 40v. owing to power dissipation characteristics of the available packages, full output current cannot be guaranteed for all combinations of ambient tem- perature and input voltage. the junction to ambient thermal resistance ja rating has two distinct components: the junction to case thermal resis- tance rating jc ; and the case to ambient thermal resistance rating ca . the relationship is defined as: ja = jc + ca . for the so-8 and to-252 surface mount packages the ja rating can be improved by using the copper mounting pads on the printed circuit board as a thermal conductive path to extract heat from the package. lm2936-3.0 www.national.com 6
applications information (continued) on the so-8 package the four ground pins are thermally connected to the backside of the die. adding approximately 0.04 square inches of 2 oz. copper pad area to these four pins will improve the ja rating to approximately 110?c/w. if this extra pad are is placed directly beneath the package there should not be any impact on board density. on the to-252 package the ground tab is thermally con- nected to the backside of the die. adding 1 square inch of 2 oz. copper pad area directly under the ground tab will im- prove the ja rating to approximately 50?c/w. while the lm2936 has an internally set thermal shutdown point of typically 150?c, this is intended as a safety feature only. continuous operation near the thermal shutdown tem- perature should be avoided as it may have a negative affect on the life of the device. while the lm2936-3.0 will survive input transients to +60v, output regulation is not guaranteed for input voltages greater than 40v. the lm2936 will not withstand a output short circuit with the input above 40v because of safe operating area limitations in the internal pnp pass device. with input voltages above 60v the lm2936 will break down with cata- strophic effects on the regulator and possibly the load as well. do not use this device in a design where the input operating voltage may exceed 40v, or where transients are likely to exceed 60v. shutdown pin the lm2936bm has a pin for shutting down the regulator output. applying a logic level high ( > 2.0v) to the shutdown pin will cause the output to turn off. leaving the shutdown pin open, connecting it to ground, or applying a logic level low ( < 0.6v) will allow the regulator output to turn on. lm2936-3.0 www.national.com 7
physical dimensions inches (millimeters) unless otherwise noted 8-lead small outline molded package (m) ns package number m08a to-252 package (dt) ns package number td03b lm2936-3.0 www.national.com 8
physical dimensions inches (millimeters) unless otherwise noted (continued) sot-223 package (mp) ns package number ma04a 3-lead to-92 plastic package (z) ns package number z03a lm2936-3.0 www.national.com 9
physical dimensions inches (millimeters) unless otherwise noted (continued) 8-lead mini soic package (mm) ns package number mua08a life support policy national?s products are not authorized for use as critical components in life support devices or systems without the express written approval of the president and general counsel of national semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. a critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. national semiconductor corporation americas email: support@nsc.com national semiconductor europe fax: +49 (0) 180-530 85 86 email: europe.support@nsc.com deutsch tel: +49 (0) 69 9508 6208 english tel: +44 (0) 870 24 0 2171 fran?ais tel: +33 (0) 1 41 91 8790 national semiconductor asia pacific customer response group tel: 65-2544466 fax: 65-2504466 email: ap.support@nsc.com national semiconductor japan ltd. tel: 81-3-5639-7560 fax: 81-3-5639-7507 www.national.com lm2936-3.0 ultra-low quiescent current 3.0v regulator national does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and national reserves the righ t at any time without notice to change said circuitry and specifications.
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