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. 82207 ms 20070727-s00003 / 62707 ms pc no.a0852-1/4 LA5797M overview the LA5797M is a charge pump step-up powe r supply for variable capacitance diodes. features ? by using charge pump, no coils are necessary. ? time-base generator (140khz) incorporated. ? thermal shutdown circuit incorporated. specifications maximum ratings at ta = 25 c parameter symbol conditions ratings unit input voltage v in 30 v allowable power dissipation pd max mounted on the specified board. * 0.91 w operating temperature topr -25 to +90 c storage temperature tstg -40 to +150 c * specified board: 114.3mm 76.1mm 1.6mm, glass epoxy board. recommended operating conditions at ta = 25 c parameter symbol conditions ratings unit input voltage range v in 7.5 to 28 v monolithic linear ic for variable capacitance diodes charge pump step-up power supply orderin g numbe r : ena0852a
LA5797M no.a0852-2/4 electrical characteristics at ta = 25 c ratings parameter symbol conditions min typ max unit reference voltage vfb v in = 15v, i o = 5ma 1.189 1.225 1.261 v switching frequency f v in = 7.5v to 28v 112 140 168 khz thermal shutdown operating temperature tsd designed target value. * 165 c thermal shutdown hysteresis width ? tsd designed target value. * 15 c * design target value : no measurement made. package dimensions unit : mm (typ) 3032d pin assignment 1 v in 2 en 3 nc 4 nc 8 7 6 5 vret cpout gnd fb top view sanyo : mfp8(225mil) 14 85 5.0 0.63 6.4 0.15 0.35 1.27 (0.65) 4.4 (1.5) 1.7max 0.1 0.44 -25 0 25 50 75 100 125 0 0.2 1.0 0.8 0.6 0.4 pd max -- ta 90 ambient temperature, ta -- c allowable power dissipation, pd max -- w specified board: 114.3 76.1 1.6mm 3 glass epoxy board.
LA5797M no.a0852-3/4 block diagram v in en reg. osc vref drive on/off amp. drive on/off cpout fb vret gnd tsd application circuit example external circuit diagram (v cc = 24v) gnd LA5797M cpout 24v v cc vret 31-32 v fb en external circuit diagram (v cc = 15v) gnd LA5797M cpout 15v v cc vret 31-32 v fb en note : the ic is made active when the en pin is pulled dow n to gnd. the charge pump operation is stopped when the en pin is pulled up to v in .
LA5797M ps no.a0852-4/4 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 august, 2007. specifications and information herein are subject to change without notice.
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