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TPS65231 Datasheet(PDF) 7 Page - Texas Instruments |
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TPS65231 Datasheet(HTML) 7 Page - Texas Instruments |
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7 / 30 page  TPS65230, TPS65231 www.ti.com.................................................................................................................................... SLVSA10A – SEPTEMBER 2009 – REVISED SEPTEMBER 2009 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 PG glitch rejection 50 µs VFB Feedback voltage –2% 0.804 2% V IOUT Output current 3 A η Efficiency IO = 2 A, VOUT = 1.2 V 86 % 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 = 1000 mA 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 µF ESR Capacitor ESR 50 mW L Nominal inductance 2.2 µH SOFT START (BUCK1, 2, and 3) ISS Soft start current source 2 µA VSS, MAX Soft start ramp voltage Ramp end 0.8 V CSS Soft start capacitor tSS = 0.4 ms/nF 2 3.3 5 nF SSDONE_BK Deglitch time 2.5 ms SSDONE_DCH SS discharge time 500 µS SUPPLY VOLTAGE SUPERVISOR Supply rising 3.2 Threshold voltage VMON1 Supply falling 3 V (VMON1) Hysteresis .05 Supply rising 850 Threshold voltage VMON2 Supply falling 750 mV (VMON2) Hysteresis 20 tdeglitch Deglitch time (both edges) 192 µs VOL Reset pin output-low voltage Isink = 3.2 mA 0.4 V tRP Minimum reset period 180 ms USB POWER SWITCHES RDS(on) On resistance 100 m Ω VINU = 5.5 V, CL = 120 mF, tr Rise time output 1 ms VOUT 10% to 90%. ton Turn-on time CL = 100 µF, rL = 10 Ω 3 ms toff Turn-off time CL = 100 µF, rL = 10 Ω 10 ms Over Current limit TPS65230 0.6 0.8 1 IOC A Output shorted to ground TPS65231 1.2 1.6 2 OC deglitch Over current deglitch 4 8 15 ms THERMAL SHUTDOWN Thot Thermal warning 120 °C Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Link(s): TPS65230 TPS65231 Not Recommended for New Designs |
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