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TPS54319RTET Datasheet(PDF) 4 Page - Texas Instruments |
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TPS54319RTET Datasheet(HTML) 4 Page - Texas Instruments |
4 / 32 page TPS54319 SLVSA83 – JUNE 2010 www.ti.com ELECTRICAL CHARACTERISTICS TJ = –40°C to 150°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 2.6 2.8 V Shutdown supply current EN = 0 V, 25°C, 2.95 V ≤ VIN ≤ 6 V 2 5 mA Quiescent Current - Iq VSENSE = 0.9 V, VIN = 5 V, 25°C, RT = 400 k Ω 360 575 mA ENABLE AND UVLO (EN PIN) Enable threshold Rising 1.25 V Falling 1.18 Enable threshold + 50 mV –4.6 Input current mA Enable threshold – 50 mV –1.2 VOLTAGE REFERENCE (VSENSE PIN) Voltage Reference 2.95 V ≤ VIN ≤ 6 V, 0°C <TJ < 85°C 0.802 0.827 0.852 V MOSFET BOOT-PH= 5 V 45 81 High side switch resistance m Ω BOOT-PH= 2.95 V 64 110 VIN= 5 V 42 81 Low side switch resistance m Ω VIN= 2.95 V 59 110 ERROR AMPLIFIER Input current 7 nA Error amplifier transconductance (gm) –2 mA < I(COMP) < 2 mA, V(COMP) = 1 V 245 mmhos Error amplifier transconductance (gm) during –2 mA < I(COMP) < 2 mA, V(COMP) = 1 V, 79 mmhos slow start Vsense = 0.4 V Error amplifier source/sink V(COMP) = 1 V, 100 mV overdrive +20 mA –20 COMP to Iswitch gm 18 A/V CURRENT LIMIT Current limit threshold 3V 4.2 6.6 A THERMAL SHUTDOWN Thermal Shutdown 165 °C Hysteresis 15 °C TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK PIN) Switching frequency range using RT mode 300 2000 kHz Switching frequency Rt = 400 k Ω 400 500 600 kHz Switching frequency range using CLK mode 300 2000 kHz Minimum CLK pulse width 75 ns RT/CLK voltage R(RT/CLK)= 400k Ω 0.5 V RT/CLK high threshold 1.6 2.2 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 14 ms 4 Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated Product Folder Link(s): TPS54319 |
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