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TPS57114-EP Datasheet(PDF) 7 Page - Texas Instruments |
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TPS57114-EP Datasheet(HTML) 7 Page - Texas Instruments |
7 / 43 page TPS57114-EP www.ti.com SLVSCG0 – JULY 2014 Electrical Characteristics (continued) TJ = –55°C to 150°C, VIN = 2.95 to 6 V (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT CURRENT LIMIT V(VIN) = 2.95 V, 25°C < TJ < 150°C 5 6.4 TJ = –55°C 4 Current-limit threshold A V(VIN) = 6 V, 25°C < TJ < 150°C 4.4 5.56 TJ = –55°C 4 THERMAL SHUTDOWN Thermal shutdown 168 °C Hysteresis 20 °C TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK PIN) Switching frequency range using RT mode 200 2000 kHz Switching frequency R(RT/CLK) = 400 kΩ 400 500 600 kHz Switching frequency range using CLK mode 300 2000 kHz Minimum CLK pulse duration 80 ns RT/CLK voltage R(RT/CLK) = 400 kΩ 0.5 V RT/CLK high threshold 1.6 2.5 V RT/CLK low threshold 0.4 0.6 V RT/CLK falling edge to PH rising edge delay Measure at 500 kHz with RT resistor in series 90 ns PLL lock in time Measure at 500 kHz 42 µs PH (PH PIN) Measured at 50% points on PH, IOUT = 3.5 A 75 Minimum on-time ns Measured at 50% points on PH, V(VIN) = 6 V, 120 IOUT = 0 A Prior to skipping off pulses, BOOT-PH = 2.95 V, Minimum off-time 60 ns IOUT = 3.5 A Rise time 2.25 V(VIN) = 6 V, 3.5 A V/ns Fall time 2 BOOT (BOOT PIN) BOOT charge resistance V(VIN) = 5 V 16 Ω BOOT-PH UVLO V(VIN) = 2.95 V 2.1 V SLOW START AND TRACKING (SS/TR PIN) Charge current V(SS/TR) = 0.4 V 2 µA SS/TR to VSENSE matching V(SS/TR) = 0.4 V 54 mV SS/TR to reference crossover 98% normal 1.1 V SS/TR discharge voltage (overload) V(VSENSE) = 0 V 60 mV SS/TR discharge current (overload) V(VSENSE) = 0 V, V(SS/TR) = 0.4 V 350 µA SS discharge current (UVLO, EN, thermal fault) V(VIN) = 5 V, V(SS) = 0.5 V 1.9 mA POWER-GOOD (PWRGD PIN) V(VSENSE) falling (fault) 91 V(VSENSE) rising (good) 93 VSENSE threshold %V(VREF) V(VSENSE) rising (fault) 109 V(VSENSE) falling (good) 107 Hysteresis V(VSENSE) falling 2 %V(VREF) Output high leakage V(VSENSE) = V(VREF), V(PWRGD) = 5.5 V 7 nA On-resistance 56 100 Ω Output low I(PWRGD) = 3 mA 0.3 V Minimum VIN for valid output V(PWRGD) < 0.5 V at 100 µA 0.650 1.5 V Copyright © 2014, Texas Instruments Incorporated Submit Documentation Feedback 7 |
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