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NJW4132 - 1 - ver.2013-04-16 switching regulator ic for boost converter current mode control w/ 45v/1.75a mosfet general description package outline features current mode control external clock synchronization wide operating voltage range 4.5v to 40v switching current 1.75a min. pwm control built-in compensation circuit correspond to ceramic capacitor (mlcc) oscillating frequency 300khz typ. (a ver.) 700khz typ. (b ver.) soft start function 10ms typ. uvlo (under voltage lockout) over current protection (hiccup type) thermal shutdown protection standby function package outline NJW4132u2 : sot-89-5 product classification part number version oscillation frequency package operating temperature range NJW4132u2-a a 300khz typ. sot-89-5 general spec. -40 c to +85 c NJW4132u2-b b 700khz typ. sot-89-5 general spec. -40 c to +85 c the NJW4132 is a boost converter with 45v/1.75a mosfet. it corresponds to high oscillating frequency, and low esr output capacitor (mlcc) within wide input range from 4.5v to 40v. therefore, the NJW4132 can realize downsizing of applications with a few external parts so that adopts current mode control. also, it has a soft start function , external clock synchronization, over current protection and thermal shutdown circuit. it is suitable for boost application to a car accessory, office a utomation equipmen t , industrial instrument and so on. NJW4132u2
NJW4132 - 2 - ver.2013-04-16 pin configuration block diagram v + in- er ? amp buf f er ocp current sense tsd vref sof t start uv lo slope comp. 1v s q r osc enable (standby) gnd high: on low : off(standby) en/sync sw pwm sync low frequency contr ol 100k ? pin function 1. sw 2. gnd 3. in- 4. en/sync 5. v + NJW4132u2 1 2 3 4 5 (2)
NJW4132 - 3 - ver.2013-04-16 absolute maximum ratings (ta=25c) parameter symbol maximum ratings unit supply voltage v + +45 v sw pin voltage v sw +45 v in- pin voltage v in- -0.3 to +6 v en/sync pin voltage v en/sync +45 v power dissipation p d sot-89-5 625 (*1) 2,400 (*2) mw junction temperature range tj -40 to +150 c operating temperature range t opr -40 to +85 c storage temperature range t stg -40 to +150 c (*1): mounted on glass epoxy board. (76.2114.31.6mm:based on eia/jdec standard size, 2layers, cu area 100mm 2 ) (*2): mounted on glass epoxy board. (76.2114.31.6mm:based on eia/jdec standard, 4layers) (for 4layers: applying 74.274.2mm inner cu area and a thermal via hall to a board based on jedec standard jesd51-5) recommended operating conditions parameter symbol min. typ. max. unit supply voltage v + 4.5 ? 40 v external clock input range a version b version f sync 290 690 ? ? 500 1,000 khz
NJW4132 - 4 - ver.2013-04-16 electrical characteristics (unless otherwise noted, v + =v en./sync =12v, ta=25 c) parameter symbol test condition min. typ. max. unit under voltage lockout block on threshold voltage v t_on v + = l h 4.2 4.35 4.5 v off threshold voltage v t_off v + = h l 4.1 4.25 4.4 v hysteresis voltage v hys 70 100 ? mv soft start block soft start time t ss v b =0.95v 5 10 15 ms oscillator block a version, v in- =0.9v 270 300 330 khz oscillation frequency f osc b version, v in- =0.9v 630 700 770 khz a version, v in- =0.4v ? 50 ? khz oscillation frequency ocp operates f osc_lim b version, v in- =0.4v ? 117 ? khz oscillation frequency deviation (supply voltage) f dv v + =4.5v to 40v ? 1 ? % oscillation frequency deviation (temperature) f dt ta = - 4 0 c to +85 c ? 5 ? % error amplifier block reference voltage v b -1.0% 1.0 +1.0% v input bias current i b -0.1 ? +0.1 a pwm comparate block maximum duty cycle m ax d uty v in- =0.9v 85 90 ? % a version ? 300 425 ns minimum on time1 (use built-in oscillator) t on-min1 b version ? 110 155 ns a version, f sync =400khz ? 220 355 ns minimum on time2 (use ext clk) t on-min2 b version, f sync =800khz ? 90 125 ns ocp block cool down time t cool ? 42 ? ms output block output on resistance r on i sw =1a ? 0.4 0.65 ? switching current limit i lim 1.75 2.1 2.25 a sw leak current i leak v en/sync =0v, v sw =45v ? ? 1 a
NJW4132 - 5 - ver.2013-04-16 electrical characteristics (unless otherwise noted, v + =v en/sync =12v, ta=25 c) parameter symbol test condition min. typ. max. unit standby control block on control voltage v on v en/sync = l h 1.6 ? v + v off control voltage v off v en/sync = h l 0 ? 0.5 v input bias current (en/sync pin) i en v en/sync =12v ? 165 300 a general characteristics a version, r l =no load, v in- =0.9v ? 2.1 2.65 ma quiescent current i dd b version, r l =no load, v in- =0.9v ? 2.5 3.0 ma standby current i dd_stb v en/sync =0v ? ? 1 a
NJW4132 - 6 - ver.2013-04-16 typical applications boost converter gnd in- v + c fb r2 c out l sbd NJW4132 v in c in r1 v out r fb sw en/ sync en/ sy nc high: on low: off (standby) buck-boost (sepic) converter gnd in- v + c fb r2 c out l1 sbd NJW4132 v in c in r1 v out r fb sw en/ sy nc en/ sy nc high: on low: off ( standby) c1 l2
NJW4132 - 7 - ver.2013-04-16 typical characteristics oscillation frequency vs. supply voltage (a ver., v in- =0.9v, ta=25c) 280 285 290 295 300 305 310 315 320 0 10203040 supply voltage v + (v) oscillation frequnecny f osc (khz) oscillation frequency vs. supply voltage (b ver., v in- =0.9v, ta=25c) 680 685 690 695 700 705 710 715 720 0 10203040 supply voltage v + (v) oscillation frequnecny f osc (khz) quiescent current vs. supply voltage (b ver., r l =no load, v in- =0.9v, ta=25c) 0 0.5 1 1.5 2 2.5 3 0 10203040 supply voltage v + (v) quiescent current i dd (ma) quiescent current vs. supply voltage (a ver., r l =no load, v in- =0.9v, ta=25c) 0 0.5 1 1.5 2 2.5 3 0 10203040 supply voltage v + (v) quiescent current i dd (ma) reference voltage vs. supply voltage (ta=25c) 0.99 0.995 1 1.005 1.01 0 10203040 supply voltage v + (v) reference voltage v b (v)
NJW4132 - 8 - ver.2013-04-16 typical characteristics reference voltage vs. temperature (v + =12v) 0.99 0.995 1 1.005 1.01 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) reference voltage v b (v) output on resistance vs. temperature (i sw =1a) 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) output on resistance r on ( ? ) v + =4.5v, 12v, 40v switching current limit vs. temperature 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) switching current limit i lim (a) v + =4.5v, 12v, 40v under voltage lockout voltage vs. temperature 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) threshold voltage (v) v t_on v t_off oscillation frequency vs temperature (a ver., v + =12v, v in- =0.9v) 270 280 290 300 310 320 330 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) oscillation frequency fosc (khz) oscillation frequency vs temperature (b ver., v + =12v, v in- =0.9v) 620 640 660 680 700 720 740 760 780 -50-25 0 255075100125150 ambient temperature ta (c) oscillation frequency fosc (khz)
NJW4132 - 9 - ver.2013-04-16 typical characteristics soft start time vs. temperature (v + =12v, v b =0.95v) 5 6 7 8 9 10 11 12 13 14 15 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) soft start time tss (ms) maximum duty cycle vs. temperature (a ver., v + =12v, v in- =0.9v) 84 86 88 90 92 94 96 98 100 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) maximum duty cycle m ax d uty (%) maximum duty cycle vs. temperature (b ver., v + =12v, v in- =0.9v) 84 86 88 90 92 94 96 98 100 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) maximum duty cycle m ax d uty (%) minimum on time1 vs. temperature (a ver., v + =12v) 150 200 250 300 350 400 450 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) minimum on time1 t on-min1 (ns) minimum on time1 vs. temperature (b ver., v + =12v) 60 80 100 120 140 160 180 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) minimum on time1 t on-min1 (ns)
NJW4132 - 10 - ver.2013-04-16 typical characteristics quiescent current vs. temperature (a ver., r l =no load, v in- =0.9v) 0 0.5 1 1.5 2 2.5 3 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) quiescent current i dd (ma) v + =12v, 40v v + =4.5v quiescent current vs. temperature (b ver., r l =no load, vin-=0.9v) 0 0.5 1 1.5 2 2.5 3 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) quiescent current i dd (ma) v + =4.5v, 12v, 40v standby current vs. temperature (v en/sync =0v) 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) standby current i dd_stb (a) v + =40v v + =12v v + =4.5v switching leak current vs. temperature (v + =12v, v en/sync =0v, v sw =45v) 0 0.5 1 1.5 2 2.5 3 -50 -25 0 25 50 75 100 125 150 ambient temperature ta (c) switching leak current i leak (a)
NJW4132 - 11 - ver.2013-04-16 memo [caution] the specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. the application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights.

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