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TPS54260-Q1 Datasheet(PDF) 5 Page - Texas Instruments |
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TPS54260-Q1 Datasheet(HTML) 5 Page - Texas Instruments |
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5 / 48 page  TPS54260-Q1 www.ti.com SLVSAH8A – DECEMBER 2010 – REVISED APRIL 2011 ELECTRICAL CHARACTERISTICS (continued) TJ = -40 to 150°C, VIN = 3.5 to 60V (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK PIN) Switching Frequency Range using 100 2500 kHz RT mode fSW Switching frequency RT = 200 kΩ 450 581 720 kHz Switching Frequency Range using 300 2200 kHz CLK mode Minimum CLK input pulse width 40 ns RT/CLK high threshold 1.9 2.2 V RT/CLK low threshold 0.5 0.7 V RT/CLK falling edge to PH rising Measured at 500 kHz with RT resistor in series 60 ns edge delay PLL lock in time Measured at 500 kHz 100 μs SLOW START AND TRACKING (SS/TR) Charge current VSS/TR = 0.4 V 2 μA SS/TR-to-VSENSE matching VSS/TR = 0.4 V 45 mV SS/TR-to-reference crossover 98% nominal 1.15 V SS/TR discharge current (overload) VSENSE = 0 V, V(SS/TR) = 0.4 V 382 μA SS/TR discharge voltage VSENSE = 0 V 54 mV POWER GOOD (PWRGD PIN) VSENSE falling 92% VSENSE rising 94% VVSENSE VSENSE threshold VSENSE rising 109% VSENSE falling 107% Hysteresis VSENSE falling 2% Output high leakage VSENSE = VREF, V(PWRGD) = 5.5 V, 25 °C 10 nA On resistance I(PWRGD) = 3 mA, VSENSE < 0.79 V 50 Ω Minimum VIN for defined output V(PWRGD) < 0.5 V, II(PWRGD) = 100 μA 0.95 1.5 V Copyright © 2010–2011, Texas Instruments Incorporated 5 |
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