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TPS54040 Datasheet(PDF) 3 Page - Texas Instruments |
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TPS54040 Datasheet(HTML) 3 Page - Texas Instruments |
3 / 47 page PACKAGE DISSIPATION RATINGS (1) ELECTRICAL CHARACTERISTICS TPS54040 www.ti.com................................................................................................................................................................................................... SLVS918 – MARCH 2009 THERMAL IMPEDANCE PACKAGE JUNCTION TO AMBIENT MSOP 57 °C/W (1) Test board conditions: A. 3 inches × 3 inches, 2 layers, thickness: 0.062 inch B. 2-ounce copper traces located on the top and bottom of the PCB C. 6 (13 mil diameters) THERMAL VIAS LOCATED UNDER THE DEVICE PACKAGE TJ = –40°C to 150°C, VIN = 3.5 to 42V (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SUPPLY VOLTAGE (VIN PIN) Operating input voltage 3.5 42 V Internal undervoltage lockout No voltage hysteresis, rising and falling 2.5 V threshold Shutdown supply current EN = 0 V, 25°C, 3.5 V ≤ VIN ≤ 42 V 1.3 4 µA Operating : nonswitching supply VSENSE = 0.83 V, VIN = 12 V, 25°C 116 136 current ENABLE AND UVLO (EN PIN) Enable threshold voltage No voltage hysteresis, rising and falling, 25°C 0.9 1.25 1.55 V Enable threshold +50 mV –3.8 Input current µA Enable threshold –50 mV –0.9 Hysteresis current –2.9 µA VOLTAGE REFERENCE TJ = 25°C 0.792 0.8 0.808 Voltage reference V 0.784 0.8 0.816 HIGH-SIDE MOSFET VIN = 3.5 V, BOOT-PH = 3 V 300 On-resistance m Ω VIN = 12 V, BOOT-PH = 6 V 200 410 ERROR AMPLIFIER Input current 50 nA Error amplifier transconductance (gM) –2 µA < ICOMP < 2 µA, VCOMP = 1 V 97 µMhos –2 µA < I COMP < 2 µA, VCOMP = 1 V, Error amplifier transconductance (gM) 26 µMhos during slow start VVSENSE = 0.4 V Error amplifier dc gain VVSENSE = 0.8 V 10,000 V/V Error amplifier bandwidth 2700 kHz Error amplifier source/sink V(COMP) = 1 V, 100 mV overdrive ±7 µA COMP to switch current 1.9 A/V transconductance CURRENT LIMIT Current limit threshold VIN = 12 V, TJ = 25°C 0.6 0.94 A THERMAL SHUTDOWN Thermal shutdown 182 °C Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Link(s): TPS54040 |
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