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TPS65282 Datasheet(PDF) 8 Page - Texas Instruments |
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TPS65282 Datasheet(HTML) 8 Page - Texas Instruments |
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8 / 36 page  TPS65282 SLVSBU5 – MARCH 2013 www.ti.com ELECTRICAL CHARACTERISTICS TJ = 25°C, VIN = 12 V, fSW = 600 kHz, RnFAULT = 100 kΩ (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT INPUT SUPPLY VIN Input voltage range 4.5 18 V IDDSDN Shutdown supply current EN = EN_SW1 = EN_SW2 = low 7 20 µA Switching quiescent current with no load at EN = high, EN_SWx = low IDDQ_NSW 0.5 mA DCDC output With Buck switching Rising VIN 4 4.25 4.50 UVLO VIN under voltage lockout Falling VIN 3.75 4 4.25 V Hysteresis 0.25 V7V load current = 0 A, V7V Internal biasing supply 6.15 6.3 6.45 V VIN = 12 V OSCILLATOR fSW_BK Switching frequency range Set by external resistor ROSC 300 1400 kHz ROSC = 51 k Ω 560 ROSC = 130 k Ω 1400 fSW Programmable frequency kHz ROSC floating or connected to V7V 510 600 690 ROSC connected to ground 225 300 345 BUCK CONVERTER VCOMP = 1.2 V, TJ = 25°C 0.792 0.8 0.808 VFB Feedback voltage V VCOMP = 1.2 V, TJ = -40°C to 125°C 0.784 0.8 0.816 VLINEREG Line regulation - DC IOUT = 2 A 0.5 %/V VLOADREG Load regulation - DC IOUT = (10% - 90%)IOUT_max 0.5 %/A Gm_EA Error amplifier trans-conductance -2 µA < ICOMP < 2 µA 600 µs Gm_SRC COMP voltage to inductor current Gm(1) ILX = 0.5 A 36 A/V VENH EN high level input voltage 2 1.24 V VENL EN low level input voltage 0.98 0.4 V ISS Soft-start charging current 5 µA tSS_INT Internal soft-start time SS pin floats 1.2 ms ILIMIT Buck peak inductor current limit 5.2 A Rdson_HS On resistance of high side FET in buck V7V = 6.2.5 V including banding wire 100 m Ω Rdson_LS On resistance of low side FET in buck VIN = 12 V including banding wire 60 m Ω POWER GOOD RESET GENERATOR Output falling 91.6 VUVBUCK Threshold voltage for buck under voltage % Output rising (PG will be asserted) 94.4 Output rising (high side FET will be forced off) 105.4 VOVBUCK Threshold voltage for buck over voltage % Output falling (high side FET will be allowed to 104.2 switch) Change FB from 0.8 V to 1 V, TD-L PGOOD H-L delay time Measure the delay from FB = 1 V to PGOOD 100 µs low Change FB from 1 V to 0.8 V, TD-H PGOOD L-H delay time Measure the delay from FB = 0.8 V to PGOOD 130 µs high Force FB = 1 V to create fault condition, VPGOOD PGOOD pin output low voltage Sink 1-mA current to PGOOD pin, 100 300 mV Measure the PGOOD pin voltage POWER DISTRIBUTION SWITCH VSW_IN Power switch input voltage range 2.5 6 V VSW_IN rising 2.15 2.25 2.35 V VUVLO_SW Input under-voltage lock out VSW_IN falling 2.05 2.15 2.25 V Hysteresis 100 mV (1) Specified by design. 8 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Product Folder Links: TPS65282 |
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