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TPS40322 Datasheet(PDF) 4 Page - Texas Instruments |
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TPS40322 Datasheet(HTML) 4 Page - Texas Instruments |
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4 / 40 page  TPS40322 SLUSAF8 – JUNE 2011 www.ti.com ELECTRICAL CHARACTERISTICS TJ = –40°C to 125°C, VVDD = 12 V, RRT = 40 kΩ, fSW = 500 kHz (unless otherwise noted), PARAMETER TEST CONDITIONS MIN TYP MAX UNITS INPUT SUPPLY VDD Input voltage range 3 20 V IDDSDN Shutdown VENx/SSx = 0 V 200 250 µA IDDQ Quiescent, non-switching VFB = 0.65 V, ENx/SSx float 6 8 mA UVLO UVLO Minimum turn-on voltage 1.21 1.24 1.27 V UVLOHYS Hysteresis current 13 15 17 μA BP REGULATOR BP Regulator voltage 7 ≤ VVDD ≤ 20 V 6.2 6.5 6.8 V VDO Regulator dropout voltage IBP = 25 mA, VVDD = 3 V 50 100 mV IBP Regulator continuous current limit(1) 100 mA VBPUVLO Regulator output UVLO 2.40 2.70 2.95 V VBPUVLO-HYS Regulator output UVLO hysteresis 180 210 250 mV OSCILLATOR/ RAMP GENERATOR 100 1000 kHz fSW Oscillator frequency RRT = 40 kΩ 450 500 550 kHz VRAMP Ramp amplitude (preak-to-peak) 3 V < VVDD < 20 V VDD/8.5 V VVAL Valley voltage 0.85 V fSYNC SYNC frequency range 200 2000 kHz tPW(sync) SYNC input minimum pulse width 100 ns VH(sync) Rising edge threshold to set sync pulse 2 V VL(sync) Falling edge threshold to reset sync pulse 0.8 V fMASTER Master clock frequency 200 2000 kHz ΔfSYNC Percent of master frequency for synchronization –20% 20% Master 0 °/180° phase shift 0.5 V VPHSET Slave 0 °/180° phase shift 0.6 2.0 V Slave 90 °/270° phase shift 2.1 V PWM PWM(off) Minimum PWM off-time 90 130 ns tON(min) Minimum controllable pulse width See (1) 90 ns tDEAD Output driver dead time HDRV off to LDRV on 20 35 40 ns tDEAD Output driver dead time LDRV off to HDRV on 20 35 40 ns ERROR AMPLIFIER AND VOLTAGE REFERENCE 0 °C < TJ < 70°C 597 600 603 mV VFB FB input voltage –40°C < TJ < 125°C 594 600 606 IFB FB input bias current 20 75 nA GBWP Unity gain bandwidth See (1) 24 MHz AVOL Open loop gain See (1) 80 dB IOH High-level output current 3 mA IOL Low-level output current 9 mA (1) Specified by design. Not production tested. 4 Copyright © 2011, Texas Instruments Incorporated |
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