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TPS40070PWPG4 Datasheet(PDF) 3 Page - Texas Instruments |
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TPS40070PWPG4 Datasheet(HTML) 3 Page - Texas Instruments |
3 / 30 page ELECTRICAL CHARACTERISTICS TPS40070 TPS40071 www.ti.com .................................................................................................................................................. SLUS582J – DECEMBER 2003 – REVISED APRIL 2009 TA = –40°C to 85°C, VIN = 12 Vdc, RT = 90.9 kΩ, IKFF = 300 A, fSW = 500 kHz, all parameters at zero power dissipation (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT INPUT SUPPLY VDD Input voltage range, VIN 4.5 28 V OPERATING CURRENT IDD Quiescent current Output drivers not switching 2.5 3.5 mA LVBP VLVBP Output voltage TA = TJ = 25°C 3.9 4.2 4.5 V OSCILLATOR/RAMP GENERATOR (1) fOSC Accuracy 450 500 550 kHz VRAMP PWM ramp voltage(2) VPEAK-VVAL 2.0 V VRT RT voltage 2.23 2.40 2.58 V tON Minimum output pulse time(2) CHDRV = 0 nF 250 ns VFB = 0 V, 100 kHz ≤ fSW ≤ 500 kHz 84% 93% Maximum duty cycle VFB = 0 V, fSW = 1 MHz 76% 93% VKFF Feed-forward voltage 0.35 0.40 0.45 V IKFF Feed-forward current operating range(2) 20 1100 µA SOFT START ISS Charge current 7 12 17 µA tDSCH Discharge time CSS = 3.9 nF 25 75 µs CSS = 3.9 nF, tSS Soft-start time 210 290 500 VSS rising from 0.7 V to 1.6 V Command zero output voltage(1) 300 mV DBP VDD > 10 V 7 8 9 VDBP Output voltage V VDD = 4.5 V, IOUT = 25 mA 4.0 4.3 ERROR AMPLIFIER TA = TJ = 25°C 0.698 0.700 0.704 VFB Feedback regulation voltage total variation 0°C ≤ TA≤ 85°C 0.690 0.700 0.707 V 40°C ≤ TA≤ 85°C 0.690 0.700 0.715 VSS Soft-start offset from VSS(2) Offset from VSS to error amplifier 1 GBW Gain bandwidth(2) 5 10 MHz AVOL Open loop gain 50 dB ISRC Output source current 2.5 4.5 mA ISINK Output sink current 2.5 6 IBIAS Input bias current VFB = 0.7 V –250 0 nA (1) For zero output voltage only. Does not assure lack of activity on HDRV or LDRV. (2) Ensured by design. Not production tested. Copyright © 2003–2009, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Link(s): TPS40070 TPS40071 |
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