40809 ms pc 20090327-s00001 no.a1362-1/9 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. LV5655VB overview the LV5655VB is a 3-channel switching regulator controller. features ? low-voltage (3v) operation ? reference voltage precision : 1% ? standby circuit (ctl : controls operation of all channels) ? synchronous rectification: channel 1 and channel 2 (selected by syn voltage) ? independent soft start function for each channel specifications maximum ratings at ta = 25 c parameter symbol conditions ratings unit maximum supply voltage v cc max -0.3 to 16 v allowable power dissipation pd max mounted on a specified board* 0.72 w operating temperature topr -30 to +85 c storage temperature tstg -55 to +125 c * specified board: 114.3mm 76.1mm 1.6mm, glass epoxy board. recommended operating conditions at ta = 25 c parameter symbol conditions ratings unit supply voltage v cc 3 to 15 v supply voltage vbias 3 to 15 v oscillation frequency f osc 0.2 to 1.3 mhz bi-cmos lsi 3-channel switching regulator controller orderin g numbe r : ena1362
LV5655VB no.a1362-2/9 electrical characteristics at ta = 25c, v cc = vbias = 3.6v, scp = 0v ratings parameter symbol conditions min typ max unit error amplifier 1 in + pin internal bias voltage vb value added to the error amplifier offset at the error amplifier + side voltage 0.504 0.51 0.516 v output low voltage ch1 to ch3 v low fb in - = 2.0v, ifb = 20 a 0.2 v output high voltage ch1 to ch3 v hi fb in - = 0v, ifb1 = -20 a 2.0 v protection circuit threshold voltage v scp 1.1 1.25 1.4 v scp pin current i scp 4 a software start block soft start current ch1 to ch3 i sf csoft* = 0v 3.2 4 4.8 a soft start resistance ch1 to ch3 r sf 160 200 240 k ? fixed duty maximum on duty 1 ch1 duty max 1 in - = 0v 100 % maximum on duty 2 ch2 duty max 2 in - = 0v 100 % maximum on duty 3 ch3 duty max 3 in - = 0v 80 85 90 % output block out pin high side on resistance r out sour i o = -10ma 28 50 ? out pin low side on resistance r out sink i o = 10ma 18 35 ? triangle wave oscillator block current setting pin voltage vt rt rt = 20k ? 0.56 v oscillation frequency f osc rt = 20k ? 460 600 730 khz reference voltage block reference voltage vref 1.240 v line regulation v ln ref v cc = 3v to 15v 10 mv syn circuit on state voltage v on syn 2.0 v off state voltage v off syn 0.6 v pin input current i in syn syn* = 2v 60 a control circuit on state voltage v on ctl 2.0 v off state voltage v off ctl 0.6 v pin input current i in stby ctl = 2v 60 a all circuits v cc current consumption i cc in1 - to in3 - = 1v 4.5 6 ma standby mode current consumption i off ctl = 0v, i off = i cc + i bias 1 a
LV5655VB no.a1362-3/9 package dimensions unit : mm (typ) 3287 pin assignment 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 in1 - fb1 in2 - fb2 in3 - fb3 top view gnd_s clt (stby) vbias out3 out2n out2 rt vref csoft4 csoft2 csoft3 scp v cc syn2 syn1 gnd_p (vs) out1n out1 LV5655VB sanyo : ssop24(225mil) 6.4 6.5 0.5 4.4 (0.5) (1.3) 24 13 1 12 0.22 0.5 0.15 0.1 1.5max -30 0 20 40 60 80 100 0 1.0 0.8 0.6 0.4 0.2 pd max -- ta -20 85 0.72 0.29 ambient temperature, ta -- c allowable power dissipation, pd max --w specified board: 114.3 76.1 1.6mm 3 glass epoxy board.
LV5655VB no.a1362-4/9 block diagram and sample application circuit v cc vbias vbat fb1 step-down (down) out1 out1n + - - fb1 in1 - fb1 csoft1 clk(stby) rt scp fb2 step-down (down) out2 out2n + - - fb2 in2 - fb2 csoft2 fb3 step-down (down) gnd_p(vs) gnd_s in3 - fb3 csoft3 fb3 out3 + - - + + - + + - + + - syn1 syn2 output on/off osc (oscillation circuit) vref scp vref syn1 l: synchronous rectification h: diode rectification syn2 l: synchronous rectification h: diode rectification
LV5655VB no.a1362-5/9 pin function block pin no. pin name functions 24 in1 - error amplifier, - (inverting) input. 23 fb1 error amplifier output. 3 csoft1 soft start setting capacitor con nection. connect to gnd through a capacitor. 12 out1 output. external transistor p-channel gate connect. 11 out1n output. external transistor n-channel gate connection. ch1 (step-down) 9 syn1 synchronous rectificati on/diode rectification switching, l : synchr onous rectification h : diode rectification. 22 in2 - error amplifier, - (inverting) input. 21 fb2 error amplifier output. 4 csoft2 soft start setting capacitor con nection. connect to gnd through a capacitor. 13 out2 output. external transistor p-channel gate connect. 14 out2n output. external transistor n-channel gate connection. ch2 (step-down) 8 syn2 synchronous rectificati on/diode rectification switching, l : synchr onous rectification h : diode rectification. 20 in3 - error amplifier, - (inverting) input. 19 fb3 error amplifier output. 5 csoft3 soft start setting capacitor con nection. connect to gnd through a capacitor. ch3 (step-down) 15 out3 output. external transistor p-channel gate connect. 7 v cc power supply input (signal system). 16 vbias power supply input (pre-output stage). 18 gnd_s ground (signal system). power 10 gnd_p (vs) ground (pre-output stage). 2 vref reference voltage output. c onnect to gnd through a capacitor. 17 ctl (stby) output control, h : a ll outputs on, l : all outputs off. control 6 scp connection pin for the delay time setting capacitor of short-circuit detection circuit (connect to gnd). osc 1 rt oscillation frequency setting resistor connection (connect to gnd).
LV5655VB no.a1362-6/9 equivalent circuits pin no. pin name description equivalent circuit 17 ctl ctl: controls opera tion of all circuits. controls operation of all channels. high : on low : off 120k ? ctl gnd_s 30k ? 24 22 20 in1 - in2 - in3 - error amplifier inverting input. the regulator output is divided by a resistor and connected to in* - vreg (internal constant voltage) in* - 500 ? 5k ? 5k ? gnd_s 23 21 19 fb1 fb2 fb3 error amplifier output. these pins, in combination with in* - , configure the error amplifier filters vreg (internal constant voltage) fb* 500 ? 20 ? gnd_s 3 4 5 csoft1 csoft2 csoft3 soft start. connect to gnd via a capacitor to set the soft start time. vreg (internal constant voltage) gnd_s 500 ? 10k ? 200k ? csoft* 12 13 15 out1 out2 out3 output. connect external pchfet. out* gnd_p (vs) vbias 11 14 out1n out2n output. connect external nchfet. out*n gnd_p (vs) vbias continued on next page.
LV5655VB no.a1362-7/9 continued from preceding page. pin no. pin name description equivalent circuit 1 rt sets the oscillation frequency. connect to gnd through a resistor. constant voltage output (0.56v typ.) vreg (internal constant voltage) 500 ? 500 ? rt gnd_s 6 scp connect to gnd via a capacitor to set the short circuit detection circuit delay time. vreg (internal constant voltage) scp gnd_s 13k ? 1.5k ? 9 8 syn1 syn2 channel 1 and channel 2 synchronous/diode rectification switching. low : synchronous rectification high : diode rectification switching operates independently for the corresponding channel. 120k ? gnd_s 30k ? vreg (internal constant voltage) syn* l : synchronous rectification h : diode rectification 23 vref internal constant voltage circuit output. connect a stabilizing capacitor. vreg (internal constant voltage) vref gnd_s 14.8k ? 7 v cc signal system power supply v cc 16 vbias power system power supply (output stage) vbias 18 gnd_s signal system gnd gnd_s 10 gnd_p (vs1) output stage gnd (pre-stage) gnd_p (vs)
LV5655VB no.a1362-8/9 notes (1) soft start time setting method the soft start time is set with the capac itor connected between csoft* and gnd_s. this ic has an independent soft start function for each chan nel, so a capacitor must be connected for each csoft to set the soft start time. (description of soft start operation) (outline of soft start pin) (2) setting the oscillation frequency the oscillation frequency is set by the resist or (rt resistor) connected to the rt pin. the rt pin is a constant voltage (0.56 [v] typ.) output, an d the oscillation frequency is de termined by the current run through the rt resistor and charging/discharging of the internal capacitor. f osc [khz] = 12 1e3 rt [k ? ] (reference calculation formula) the internal oscillation frequency deviates from the calculate d value due to overshoot, undershoot and other factors, so the frequency should be confirmed in an actual set. (3) scp (short circuit protection) function ? description of operation when any one of fb1 to fb4 goes high due to the load being shorted or other reason, charging to the scp pin starts. if output does not recover during the set time tscp and scp pin voltage exceeds the threshold voltage, the protective circuit (scp) operates and all channel outputs are turned o ff. all outputs are latched off by the protection circuit (scp). this latched state (output off) is canceled by setting the ctl pin low or by turning the power supply off. when not using the protection function (scp), the scp pin must be shorted to gnd_s with a line that is as short as possible. the scp operation time is set by the capacitor connected to the scp pin. (scp charging operation) (scp function) vreg (internal constant voltage) vb (0.515[v]) 200k ? (r sf ) csoft* 4 a (i sf ) gnd_s vb r sf i sf t soft = c soft r sf in ( ) = 0.206 10 6 c soft [s] csoft* [v] csoft* voltage t [s] vb (=0.515 [v] (typ)) csoft pin charging starts the output voltage reaches the set voltage (output voltage constant) soft start time (tsoft [s]) scp ctl each output threshold voltage 1.25v (typ) output on (operating condition) time output off capacitor charging starts with the load being shorted scp [v] t [s] tscp scp operation charging with iscp = 4 [ a] output short circuit 1.25 [v] (typ)
LV5655VB ps no.a1362-9/9 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 april, 2009. specifications and information herein are subject to change without notice.
|
