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 electronics 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. o1310 sy 20100929-s00006 no.a1849-1/6 LV5990M overview LV5990M is 1ch dc-dc converter with bu ilt-in power pch mos transistor. the recommended operating range is 4.5v to 18v. the maximum current is 3a. the operating current is about 90 a, and low power consumption is achieved. functions ? 1ch sbd rectification dc-dc converter ic with built-in power pch mos transistor ? maximum value of light load mode current is 90 a. ? built-in ocp circuit with p-by-p method ? when p-by-p is generated continuous ly, it shifts to the hiccup operation. ? if connect c-hiccup to gnd pin, then latch-off when over current. ? the oscillatory frequency is 360khz. ? uvlo and built-in tsd specifications maximum ratings at ta = 25 c parameter symbol conditions ratings unit input voltage v in -max 22 v sw 30 v en, pg v in v pdr v in -6 v ref 6v allowable pin voltage ss,fb,comp c-hiccup ref v allowable power dissipation pd max specified substrate * 1.05 w operating temperature topr -40 to 85 c storage temperature tstg -55 to 150 c * specified board: 40.0mm 30.0mm ? 1.6mm, glass epoxy. bi-cmos ic low power consumption and high efficiency step-down switching regulator orderin g numbe r : ena1849
LV5990M no.a1849-2/6 recommended operating conditions at ta = 25 c parameter symbol conditions ratings unit input voltage renge v in 4.5 to 18 v electrical characteristics at ta = 25 c, v in = 15v ratings parameter symbol conditions min typ max unit reference voltage internal reference voltage vref 1.235 1.260 1.285 v pch drive voltage vpdr i out =0 to -5ma v cc -5.5 v cc -5.0 v cc -4.5 v saw wave oscillator oscillatory frequency f osc 300 360 420 khz on/off circuit ic startup voltage (en pin) v cnt _on 1.5 v in v disable voltage (en pin) v cnt _off 0.3 v soft start circuit soft start source current i ss _sc en>1.5v 1.3 2 3 a soft start sink current i ss _sk en<0.3v, ss=0.4v 120 150 180 a uvlo circuit uvlo release voltage v uvlo n fb=comp 3.0 3.4 3.8 v uvlo lock voltage v uvlo f fb=comp 2.5 2.9 3.3 v error amplifier input bias current i ea _in -100 -50 100 na error amplifier gain g ea 100 250 400 a/v output sink current i ea _osk fb=1.75v -40 -20 -10 a output source current i ea _osc fb=0.75v 10 20 40 a over current limit circuit current limit peak i cl 3.2 4.7 6.2 a hiccup timer start-up cycle n lcycles 15 cycle hiccup comparator threshold voltage v thic 1.20 1.26 1.32 v hiccup timer charge current ihic 12 3 a pwm comparator maximum on-duty d max 95 % logic output power good ?l? sink current ipwrgd _l pg=5v 4 5 6 ma power good ?h? leakage current i pwrgd _h pg=5v 1 a power good threshold fb voltage v tpg 1.0 1.1 1.2 v power good hysteresis v pg _h 40 50 60 mv power good impedance r pg 1 k output output on-resistance r on i o =1a 150 m the entire device standby current i ccs en<0.3v 1 a light load mode co nsumption current i sleep1 en>1.5v, i load =0, no oscillatory -20 c ta 70 c * 50 70 90 a thermal shutdown tsd * 170 c *: design certification
LV5990M no.a1849-3/6 pin assignment package dimensions unit : mm (typ) 3403 1 2 3 4 12 11 10 9 sw v in gnd nc pdr en pg ref top view 5 6 8 7 c-hiccup ss fb comp LV5990M sanyo : mfp12sj(225mil) 5.0 4.4 0.1 6.4 0.63 12 12 0.15 0.3 0.8 (0.5) 1.7 max (1.5) -40 0 20 40 60 80 100 0 1.5 1.0 0.5 0.55 pd max -- ta -20 1.05 ambient temperature, ta -- c allowable power dissipation, pd max -- w mounted on a specified board: 40.0 30.0 1.6mm 3 glass epoxy
LV5990M no.a1849-4/6 block diagram application circuit wake-up band-gap bias tsd enable 1.26v uvlo.comp hiccup.comp 15pluse counter pwm comp pbyp.comp ref pch drive level-shift s r q q pdr error.amperror.amp pg.comp init.comp osc slope clk gnd v in ref pdr sw gnd pg fb ss comp c-hiccup en en c-hiccup comp ss fb pg v in ref pdr sw gnd vfb vout vfb v in =4.5v to 18v
LV5990M no.a1849-5/6 pin function pin no. pin name function equivalent circuit 1 sw high-side pch mosfet drain pin v in sw 2 pdr pch mosfet gate drive voltage the bypass capacitor is necessarily connected between this pin and v in. v in pdr gnd 3 gnd ground pin. ground pin voltage is reference voltage. 12 v in supply voltage pin. it is observed by the uvlo function. when its voltage becomes 3.4v or more. ics startup in soft start. 5 c-hiccup it is capacitor connection pin for setting re-startup cycle in hiccup mode. if connect it to gnd pin, then latch-off when over current. v in gnd c-hiccup 6 ss capacitor connection pin for soft start. about 2 a current charges the soft start capacitor. v in gnd ss 7 comp error amplifier output pin. the phase compensation network is connected between gnd pin and comp pin. v in gnd comp 8 fb error amplifier reverse input pin. ics make its voltage keep 1.26v. output voltage is divided by external resistances and it across fb. v in gnd fb continued on next page. v in gnd
LV5990M ps no.a1849-6/6 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 probability. 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. continued from preceding page. pin no. pin name function equivalent circuit 9 ref reference voltage v in gnd ref 10 pg power good pin. connect to open drain of mos-fet in ics inside. setting output voltage to ?l?, when fb voltage is 1.05v or less. gnd pg 11 en on/off pin. gnd en v in this catalog provides information as of october, 2010. specifications and information herein are subject to change without notice.
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