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TPS54319RTE Datasheet(PDF) 3 Page - Texas Instruments |
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TPS54319RTE Datasheet(HTML) 3 Page - Texas Instruments |
3 / 35 page TPS54319 www.ti.com SLVSA83 – JUNE 2010 THERMAL INFORMATION TPS54319 THERMAL METRIC(1)(2) UNITS RTE (16-PINS) qJA Junction-to-ambient thermal resistance (standard board) 51.7 qJA Junction-to-ambient thermal resistance (custom board) (3) 37.0 yJT Junction-to-top characterization parameter 0.8 yJB Junction-to-board characterization parameter 19.2 °C/W qJC(top) Junction-to-case(top) thermal resistance 69.3 qJC(bottom) Junction-to-case(bottom) thermal resistance 6.2 qJB Junction-to-board thermal resistance 22 (1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953. (2) Power rating at a specific ambient temperature TA should be determined with a junction temperature of 150°C. This is the point where distortion starts to substantially increase. See power dissipation estimate in application section of this data sheet for more information. (3) Test boards conditions: (a) 2 inches x 2 inches, 4 layers, thickness: 0.062 inch (b) 2 oz. copper traces located on the top of the PCB (c) 2 oz. copper ground planes on the 2 internal layers and bottom layer (d) 4 thermal vias (10mil) located under the device package 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 Copyright © 2010, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Link(s): TPS54319 |
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