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TPS65231 Datasheet(PDF) 6 Page - Texas Instruments |
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TPS65231 Datasheet(HTML) 6 Page - Texas Instruments |
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6 / 26 page  TPS65230, TPS65231 SLVSA10A – SEPTEMBER 2009 – REVISED SEPTEMBER 2009.................................................................................................................................... www.ti.com ELECTRICAL CHARACTERISTICS (continued) VIN = 12 V ±5%, VINB2, VINB3 = 5 V ±5%, VINU = 5 V ±5% TJ = 0°C to 150°C, unless otherwise noted. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT UVD Under voltage detect VOUT falling 75 % VFB Feedback voltage –2% 0.804 2% V LDRV High and low side drive voltage No load 6 V HDRV R_ONLDRV Low side ON resistance 8 Ω R_OFFLDRV Low side OFF resistance 1 Ω R_ONHDRV High side ON resistance 20 Ω R_OFFHDRV High side OFF resistance 1 Ω d Duty cycle(2) 20 80 % AMOD Modulator gain 12 fSW Switching frequency 500 kHz Current source for setting OCP trip ITRIP TA = 25°C 10 µA point TCTRIP Temperature coefficient of ITRIP 3700 ppm/°C RTRIP Current-limit setting resistor 80 250 kW COUT Output capacitance 22(3) 47 µF L Nominal Inductance Recommended 4.7 µH BUCK2 VOUT Output voltage range(4) 0.9 3.3 V PG Power good threshold VOUT rising 95 % UVD Under voltage detect VOUT falling 75 % VFB Feedback voltage – 2% 0.804 2% V IOUT Output current 3000 mA η Efficiency IO = 2 A, VOUT = 3.3V 95 % Low-side MOSFET On resistance 32 RDS(ON) VIN12V = 12 V m Ω High-side MOSFET On resistance 36 ILIMIT Switch current limit 5 A Current limit accuracy –30 30 % Line regulation - DC VINB = 4.75 V - 6.1 V, VLINEREG 1 % ΔVOUT/ΔVINB IOUT = 1 A Load regulation - DC VLOADREG IOUT = 10 – 90% IOUT,MAX 0.5 %/A ΔVOUT/ΔIOUT Feedback resistor tolerance VOUTTOL DC set tolerance –2 2 % not included d Duty cycle(5) 15 85 % AMOD Modulator gain 5 fSW Switching frequency 1 MHz COUT Output capacitance 10(3) 47 µF ESR Capacitor ESR 50 mW L Nominal inductance 2.2 µH BUCK3 VOUT Output voltage range(4) 0.9 3.3 V PG Power good threshold VOUT rising 95 % UVD Under voltage detect VOUT falling 75 % (2) Performance outside these limits is not guaranteed. (3) Absolute value. User should make allowances for tolerance and variations due to component selection. (4) Output voltage range is limited by the minimum and maximum duty cycle. VOUT(min) ~ d(min) x VINPUT and VOUT(max) ~ d(max) x VINPUT. (5) Performance outside these limits is not guaranteed. 6 Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s): TPS65230 TPS65231 |
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