specifications of any and all sanyo semiconductor co.,l td. 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 ' sproductsor equipment. any and all sanyo semiconductor co.,ltd. products described or contained herein are, with regard to "standard application", intended for the use as general el ectronics equipment (home appliances, av equipment, communication device, office equipment, industrial equ ipment etc.). the products mentioned herein shall not be intended for use for any "special application" (medica l equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, t ransportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of re liability and can directly threaten human lives in case of failure or malfunction of the product or may cause har m to human bodies, nor shall they grant any guarantee thereof. if you should intend to use our products for app lications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us prior to the intended use. if there is n o consultation or inquiry before the intended use, our customer shall be solely responsible for the use. 60111 sy/30310 sy 20100203-s00004 no.a1660-1/4 LV57331TT overview the LV57331TT is a one-channel step-up switching regulator. features ? switch current limit : 1.0a ? uvp ? internal switch on resistance : 0.16 ? ? shutdown circuit incorporated ? the frequency can be switched. ? soft start circ uit incorporated ? overheat protection specifications maximum ratings at ta = 25 c parameter symbol conditions ratings unit power-supply voltage v in max 6.5 v sw pin voltage *1 sw 18 v input pin v in fb, vc, shdnb, fslct, ss 6.5 v allowable power dissipation pd max mounted on a specified board *2 0.7 w the maximum junction temperature tjmax 125 c operating temperature topr -40 to +85 c storage temperature tstg -55 to +150 c *1: please the coil is not connected and do not exceed the term inal sw even the overshoot inclusion when the switching is done and momentarily. *2: specified board: 60.0mm 60.0mm 1.6mm, glass epoxy board of 2-layer. recommended operating conditions at ta = 25 c, gnd=0v parameter symbol conditions ratings unit power-supply voltage v in 2.6 to 5.5 v maximum output voltage v out max 15 v orderin g numbe r : ena1660a monolithic linear ic 1ch step-up switching regulator (variable type)
LV57331TT no.a1660-2/4 electrical characteristics at ta = 25 c, v in = 2.6v, i l = 0a ratings parameter symbol conditions min typ max unit fb = 1.6v(not switching) 1.4 2.0 ma power supply current consumption i q shdnb = 0v 5 10 a feedback voltage v fb 1.215 1.245 1.275 v switch current limit i cl v in = 2.8v 1.0 1.8 3.0 a line regulation %v out / ? v in 2.6v v in 5.5v, i out = 0ma 0.05 0.2 %/v current of terminal fb bias i b -100 0 +100 na input voltage range v in 2.6 5.5 v error amplifier transconductance gm 300 s error amplifier voltage gain av 300 v/v max on duty dmax 80 85 98 % fslct = 0v or open 448 560 672 khz switching frequency fs fslct = v in 0.96 1.2 1.44 mhz shdnb = vin 0.01 0.1 a shdnb pin current i shdnb shdnb = 0v -0.4 -1 a sw pin leak current i l v sw = 18v 0.01 3 a sw pin on resistance r dson v in = 2.8v, i sw = 1a 0.16 0.4 ? shdnb [l] input threshold v il 0.3 0.6 v shdnb [h] input threshold v ih 0.6 0.9 v input voltage on threshold 1.8 1.94 2.0 v input voltage off threshold uvp 1.7 1.86 1.9 v soft start pin charge current i soft ss = 0v 6 15 24 a package dimensions unit : mm (typ) 3245b sanyo : msop8(150mil) 3.0 1.1max 3.0 0.5 4.9 12 8 0.25 0.65 (0.53) (0.85) 0.125 0.08 pd max -- ta 0 0.2 0.4 0.6 0.8 1.0 --40 0 40 80 120 0.7 allowable power dissipation, pd max - w ambient temperature, ta - c with specified board specified board: 60.0 60.0 1.6mm 3 glass epoxy board. 0.28 --20 20 60 100
LV57331TT no.a1660-3/4 package dimensions pin function explanation symbol function v c error amplifier output pin fb error amplifier reversing input pin shdnb shutdown input pin (shutdown when [l] is input) gnd gnd pin sw nch power fet open drain output v in power input pin fslct switching frequency switch pin (v in = 1.2mhz, gnd or open =560khz) ss soft start control pin. connect capacity on the outside. the constant current of 15 a flows from the pin. open when unused. block diagram application circuit example v in gnd ss l1 c1 c2 d1 LV57331TT c3 r2 r3 sw fslct shdnb v c fb r1 c4 v out v in =2.6 to 5.5v 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 v c fb shdnb gnd ss fslct v in sw (top view) fb error amp fslct oscillator slope compensation 0.4ua load current measurement pwm comp 85% duty cycle limit reset ovp ovp comp logic set drive uvp sd thermal clock bg 15ua soft start thermal shutdown driver internal supply 0.4ua v c ss shdnb v in bg gnd sw bandgap voltage reference bg
LV57331TT ps no.a1660-4/4 sanyo semiconductor co.,ltd. assumes no responsib ility for equipment failures that result from using products at values that exceed, even momentarily, rate d values (such as maximum ra tings, operating condition ranges, or other parameters) listed in products specif ications of any and all sanyo semiconductor co.,ltd. products described or contained herein. sanyo semiconductor co.,ltd. strives to supply high-qual ity high-reliability products, however, any and all semiconductor products fail or malfunction with some probabi lity. it is possible that these probabilistic failures or malfunction could give rise to acci dents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents that could cause dam age to other property. when designing equipment, adopt safety measures so that these kinds of accidents or e vents cannot occur. such measures include but are not limited to protective circuits and error prevention c ircuits for safe design, redundant design, and structural design. upon using the technical information or products descri bed herein, neither warranty nor license shall be granted with regard to intellectual property rights or any other rights of sanyo semiconductor co.,ltd. or any third party. sanyo semiconductor co.,ltd. shall not be liable f or any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. information (including circuit diagr ams and circuit parameters) herein is for example only; it is not guaranteed for volume production. any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. when designing equi pment, refer to the "delivery specification" for the sanyo semiconductor co.,ltd. product that you intend to use. in the event that any or all sanyo semiconductor c o.,ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require the export license from the authorities conc erned 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 in formation storage or retrieval system, or otherwise, without the prior written consent of sanyo semiconductor co.,ltd. this catalog provides information as of jun, 2011. specifications and information herein are subject to change without notice.
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