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TPS54388-Q1 Datasheet(PDF) 5 Page - Texas Instruments |
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TPS54388-Q1 Datasheet(HTML) 5 Page - Texas Instruments |
5 / 40 page TPS54388-Q1 www.ti.com SLVSAF1D – OCTOBER 2010 – REVISED APRIL 2015 7.4 Thermal Information TPS54388-Q1 THERMAL METRIC(1) RTE UNIT 16 PINS RθJA Junction-to-ambient thermal resistance 43.5 °C/W RθJC(top) Junction-to-case(top) thermal resistance 46.1 °C/W RθJB Junction-to-board thermal resistance 15.5 °C/W ψJT Junction-to-top characterization parameter 0.7 °C/W ψJB Junction-to-board characterization parameter 15.5 °C/W RθJC(bot) Junction-to-case(bottom) thermal resistance 3.8 °C/W (1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953. 7.5 Electrical Characteristics TJ = –40°C to 150°C, V(VIN) = 2.95 to 6 V (unless otherwise noted) DESCRIPTION CONDITIONS MIN TYP MAX UNIT SUPPLY VOLTAGE (VIN PIN) VIN UVLO start 2.28 2.5 V Internal undervoltage lockout threshold VIN UVLO stop 2.45 2.6 Shutdown supply current V(EN) = 0 V, 25°C, 2.95 V ≤ V(VIN) ≤ 6 V 5.5 15 μA Quiescent current, I(q) V(SENSE) = 0.9 V, V(VIN) = 5 V, 25°C, Rt = 400 kΩ 515 750 μA ENABLE AND UVLO (EN PIN) Rising 1.25 Enable threshold V Falling 1.18 Enable threshold + 50 mV –1.6 Input current μA Enable threshold – 50 mV –1.6 VOLTAGE REFERENCE (VSENSE PIN) Voltage reference 2.95 V ≤ V(VIN) ≤ 6 V, –40°C <TJ < 150°C 0.79 0.8 0.811 V MOSFET V(BOOT-PH) = 5 V 12 30 High-side switch resistance m Ω V(BOOT-PH) = 2.95 V 16 30 V(VIN) = 5 V 13 30 Low-side switch resistance m Ω V(VIN) = 2.95 V 17 30 ERROR AMPLIFIER Input current 2 nA Error-amplifier transconductance (gm) –2 μA < I(COMP) < 2 μA, V(COMP) = 1 V 245 μS Error-amplifier transconductance (gm) during –2 μA < I(COMP) < 2 μA, V(COMP) = 1 V, 79 μS slow start V(VSENSE) = 0.4 V Error amplifier source and sink V(COMP) = 1 V, 100-mV overdrive ±20 μA COMP to high-side FET current gm 25 S Copyright © 2010–2015, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: TPS54388-Q1 |
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