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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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TPS54719 Fiches technique(PDF) 3 Page - Texas Instruments |
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TPS54719 Fiches technique(HTML) 3 Page - Texas Instruments |
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3 / 36 page  TPS54719 www.ti.com SLVSB69 – JUNE 2012 ELECTRICAL CHARACTERISTICS TJ = –40°C to 140°C, VIN = 2.95 to 6 V (unless otherwise noted) DESCRIPTION CONDITIONS MIN TYP MAX UNIT SUPPLY VOLTAGE (VIN PIN) Operating input voltage 2.95 6 V Internal under voltage lockout threshold Rising VIN 2.4 2.8 V Internal UVLO hysteresis 0.2 V Shutdown supply current EN = 0 V, 2.95 V ≤ VIN ≤ 6 V 1 5 μA Quiescent Current - Iq VSENSE = 620 mV, RT = 84 kΩ 455 550 μA ENABLE AND UVLO (EN PIN) Enable threshold Rising 1.16 1.25 1.37 V Falling 1.18 Enable threshold + 50 mV -3.6 Input current μA Enable threshold – 50 mV -0.7 VOLTAGE REFERENCE (VSENSE PIN) Voltage Reference 2.95 V ≤ VIN ≤ 6 V, –40°C <TJ < 140°C 0.588 0.600 0.612 V MOSFET BOOT-PH = 5 V; TJ = 25°C 26 60 High side switch resistance m Ω BOOT-PH = 2.95 V; TJ = 25°C 35 70 VIN = 5 V; TJ = 25°C 26 60 Low side switch resistance m Ω VIN = 2.95 V; TJ = 25°C 35 70 ERROR AMPLIFIER Input current 50 nA Error amplifier transconductance (gm) –2 μA < I(COMP) < 2 μA, V(COMP) = 1 V 250 μmhos Error amplifier transconductance (gm) during –2 μA < I(COMP) < 2 μA, V(COMP) = 0.9 V, 85 μmhos slow start Vsense = 0.3 V Error amplifier source/sink V(COMP) = 1 V, 100 mV overdrive ±20 μA COMP to Iswitch gm 25 A/V CURRENT LIMIT Current limit threshold 8.5 10.5 A Low-side reverse current limit –1.5 –2.7 A THERMAL SHUTDOWN Thermal Shutdown 150 155 °C Hysteresis 7.5 °C TIMING RESISTOR (RT PIN) Switching frequency range using RT mode 200 2000 kHz Switching frequency Rt = 84 k Ω 400 490 600 kHz PH (PH PIN) Minimum On time Measured at 50% points on PH, VIN = 5 V, 100 ns IOUT = 500 mA Minimum On time Measured at 50% points on PH, VIN = 5 V, 64 ns IOUT = 7 A Minimum Off time Prior to skipping off pulses, BOOT-PH = 2.95 V, 0 ns IOUT = 4 A Rise/Fall time VIN = 5 V 1.5 V/ns Prior to skipping off pulses. BOOT-PH = 2.95 V, ns Dead time 70 IOUT = 4 A Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Link(s): TPS54719 |
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