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TPS53211 Datasheet(PDF) 4 Page - Texas Instruments |
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TPS53211 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 22 page TPS53211 SLUSAA9A – SEPTEMBER 2011 – REVISED NOVEMBER 2012 www.ti.com ELECTRICAL CHARACTERISTICS (1) over operating free-air temperature range, VCC = 12V, PGND = GND (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT INPUT SUPPLY VVCC VCC supply voltage Nominal input voltage range 4.5 12 V VPOR VCC POR threshold Ramp up; EN =’HI’ 4.1 4.25 4.4 V VPORHYS VCC POR hysteresis VCCDR POR hysteresis 200 mV ICC_STBY Standby current EN pin is low. VVCC= 12 V 60 µA RBoot Rds(on) of the boot strap switch 10 Ω DRIVER SUPPLY VCCDR VCCDR Supply voltage Nominal input voltage range 4.5 7.0 V VPORDR VCCDR POR threshold Ramp up; EN =’HI’ 3.15 3.32 3.50 V VPORHYSDR VCCDR POR hysteresis VCCDR POR hysteresis 220 mV ICCDR_STBY Standby current EN pin is low. VVCC = 12 V 100 µA REFERENCE VVREF VREF Internal precision reference voltage 0.8 V TOLVREF VREF tolerance Close loop trim. 0°C ≤ TJ ≤ 70°C –0.5% 0.5% ERROR AMPLIFIER UGBW(2) Unity gain bandwidth 14 MHz AOL(2) Open loop gain 80 dB IFB(int) FB Input leakage current Sourced from FB pin 10 nA IEA(max) Output sinking and sourcing current 2.5 mA SR(2) Slew rate 5 V/µs ENABLE VENH EN logic high 2.2 V VENL EN logic low 600 mV IEN EN pin current 12 µA SOFT START tSS_delay Delay after EN asserting EN = ‘HI’ to “switching enabled” 1024/fSW ms tPGDELAY PGOOD startup delay time PG delay after soft-start begins 1560/fSW ms RAMP Ramp amplitude 4.5V < VVCC < 12 V 2 V PWM tMIN(on) (2) Minimum ON time 40 ns DMAX (2) Maximum duty cycle fSW = 1 MHz 70% SWITCHING FREQUENCY fSW(typ) Typical switching frequency ROSC = 61.9 kΩ 360 400 440 kHz fSW(min) Minumum switching frequency ROSC = 250 kΩ 250 kHz fSW(max) Maximum switching frequency ROSC = 14 kΩ 1 MHz fSW(tol) Switching frequency tolerance ROSC > 12.4 kΩ –20% 20% OVERCURRENT CSP-CSN threshold for DCR VOC_TH TA = 25°C 17 20 23 mV sensing (1) See PS pin description for levels. (2) Ensured by design. Not production tested. 4 Submit Documentation Feedback Copyright © 2011–2012, Texas Instruments Incorporated |
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