80107 ms pc 20070601-s00001 no.a0853-1/6 any and all sanyo semiconductor products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft's control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. consult with your sanyo semiconductor representative nearest you before using any sanyo semiconductor products described or contained herein in such applications. sanyo semiconductor assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all sanyo semiconductor products described or contained herein. LV5743V overview the LV5743V is a 2-channel step-down switching regulator. features ? provides dual switching regulator cont rol circuits integrated on the chip. ? output-stage push-pull structure enabling high efficient operation. ? provides power supply (v cc -5v) for protecting the external p channel mos gate. ? built-in timer latch type scp (short-circuit protection circuit) ? built-in uvlo (low voltage malfunction prevention circuit) ? built-in reference voltage circuit ? max_on_duty is adjustable. specifications absolute maximum ratings at ta = 25 c parameter symbol conditions ratings unit maximum supply voltage v cc max 35 v output voltage v o max 33 v allowable power dissipation pd max mounted on a specified board * 0.74 w operating temperature topr -20 to +85 c storage temperature tstg -55 to +150 c allowable pin voltage 1 ct, non1, non2, inv1, inv2, fb1, fb2, dt1, dt2, scp, vref 7v 2 v cc -5v 30 v 3 gnd, out1, out2, v cc 35 v * : specified board : 114.3 76.1 1.6mm 3 , glass epoxy board bi-cmos lsi 2-channel step-down switching regulator orderin g numbe r : ena0853
LV5743V no.a0853-2/8 allowable operating ratings at ta = 25 c parameter symbol conditions ratings unit supply voltage v cc 8 to 33 v error amplifier input voltage v in 0 to 3.3 v timing capacitance c ct 50 to 5000 pf oscillation frequency f ct 20k to 1m hz electrical characteristics at ta = 25c, v cc = 12v ratings parameter symbol conditions min typ max unit reference voltage block output voltage vref iref = 1ma 2.4948 2.520 2.5452 v input stability v dli v cc = 8 to 33v 1 10 mv load stability v dlo iref = 0 to 5ma 1 10 mv v in -5v supply voltage v n5 i out = -5ma v cc -5.5 v cc -5.0 v cc -4.5 v triangular wave oscillator block oscillation frequency f osc c ct = 220pf 320 400 480 khz frequency fluctuation f dv v cc = 8 to 33v 1 % protection circuit block threshold voltage v it 1.5 1.7 1.9 v standby voltage v stb 50 100 mv latch voltage v lt 30 100 mv source current i scp 1.6 2.1 2.6 a comparator threshold voltage v ct 1.4 1.5 1.6 v quiescent time adjust ment circuit block vt0 duty cycle = 0% 0.45 0.5 0.55 v input threshold voltage (fosc = 20khz) vt100 duty cycle = 100% 0.95 1.0 1.05 v input bias current i bdt dt1, dt2 = 0v 0.1 1 a low voltage malfunction prevention circuit block threshold voltage v ut 6.5 7 7.5 v error amplifier input offset voltage v io 6mv input offset current i io 30 na input bias current i ib 15 100 na open gain av 85 db common mode input voltage range v om v cc = 8 to 33v 0 3.3 v common mode rejection ratio cmrr 80 db maximum output voltage v oh 2.6 v minimum output voltage v ol 0.2 0.4 v output sink current i oi fb = 1.25v 1 ma output source current i oo fb = 1.25v 85 a pwm comparator vt0 duty cycle = 0% 0.45 0.5 0.55 v input threshold voltage (fosc = 20khz) vt100 duty cycle = 100% 0.95 1.0 1.05 v output block output stage on resistance (upper) r onh 7 output stage on resistance (lower) r onl 2 overall device characteristics standby current i ccs when output is off 5 ma
LV5743V no.a0853-3/8 package dimensions unit : mm (typ) 3178b pin assignment sanyo : ssop16(225mil) 5.2 4.4 6.4 0.22 0.65 (0.33) 18 9 16 0.5 0.15 1.5max 0.1 (1.3) pd max -- ta ambient temperature, ta ? c allowable power dissipation, pd max ? w 0 0.7 0.6 0.4 0.5 0.2 0.3 0.1 0.9 0.8 ? 20 80 85 60 20 40 010 0 0.74 0.38 specified board : 114.3 76.1 1.6mm 3 glass epoxy lv5743 1 ct 2 gnd 3 non1 4 inv1 5 fb1 6 dt1 7 out1 top view 8 v cc -5v 16 vref 15 scp 14 non2 13 inv2 12 fb2 11 dt2 10 out2 9v cc
LV5743V no.a0853-4/8 pin function pin no. pin name description 1 ct external timing capacitor connection pin 2 gnd ground 3 non1 error amplifier 1 input (+) 4 inv1 error amplifier 1 input (-) 5 fb1 error amplifier 1 output 6 dt1 output 1 maximum duty setting 7 out1 output 1 8 v cc -5v power supply for output stage drive 9 v cc power supply 10 out2 output 2 11 dt2 output 2 maximum duty setting 12 fb2 error amplifier 2 input (+) 13 inv2 error amplifier 2 input (-) 14 non2 error amplifier 2 output 15 scp timer latch setting 16 vref reference voltage output block diagram v cc vref vref scp comp triangle oscillator err amp1 vref non1 inv1 out1 fb1 scp + + - + - ct dt1 + + - err amp2 non2 inv2 out2 fb2 + - + + - regulator pwm comp1 pwm comp2 reference voltage timer latch s r uvlo r dt2 gnd v cc -5v
LV5743V no.a0853-5/8 timing chart * the voltage at the non pin is {vref/(r1+1k)} 1k in uvlo mode. v cc vreg uvlo release voltage uvlo signal esd 1k non vref r1 r2 c1 non v out
LV5743V ps no.a0853-6/6 specifications of any and all sanyo semiconductor products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. to verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment. sanyo semiconductor co., ltd. strives to supply high-quality high-reliability products. however, any and all semiconductor products fail with some probability. it is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. when designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. in the event that any or all sanyo semiconductor products (including technical data,services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law. no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of sanyo semiconductor co., ltd. any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. when designing equipment, refer to the "delivery specification" for the sanyo semiconductor product that you intend to use. information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. sanyo semiconductor believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. sample application circuit diagram this catalog provides information as of august, 2007. specifications and information herein are subject to change without notice. r22 r21 c21 lv5743 f1 r20 r19 c20 1 2 3 4 5 6 7 15 14 13 12 11 10 8 16 vref scp non2 inv2 fb2 dt2 out2 v cc ct c1 c2 r4 r2 r1 r7 r8 r6 r5 c3 c4 c5 r3 gnd non1 inv1 fb1 dt1 out1 v cc-5v 9 c7 r11 r9 r10 r14 r16 r18 r22 q2 l2 r15 r13 c8 c9 c10 c18 c19 d2 c6 r12 c11 c12 c14 c15 r17 sgnd q2 l1 c16 c17 d1 c13 v cc pgnd
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