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TPS54427DDAR Datasheet(PDF) 5 Page - Texas Instruments |
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TPS54427DDAR Datasheet(HTML) 5 Page - Texas Instruments |
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5 / 30 page  5 TPS54427 www.ti.com SLVSB43C – NOVEMBER 2011 – REVISED FEBRUARY 2016 Product Folder Links: TPS54427 Submit Documentation Feedback Copyright © 2011–2016, Texas Instruments Incorporated (1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report (SPRA953). 6.4 Thermal Information THERMAL METRIC(1) TPS54427 UNIT DDA [SO PowerPAD] DRC [VSON] 8 PINS 10 PINS RθJA Junction-to-ambient thermal resistance 42.1 43.2 °C/W RθJC(top) Junction-to-case (top) thermal resistance 50.9 53.8 °C/W RθJB Junction-to-board thermal resistance 31.8 18.2 °C/W ψJT Junction-to-top characterization parameter 5 0.6 °C/W ψJB Junction-to-board characterization parameter 13.5 18.3 °C/W RθJC(bot) Junction-to-case (bottom) thermal resistance 7.1 4.7 °C/W (1) Not production tested. 6.5 Electrical Characteristics over operating free-air temperature range, VIN = 12 V (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SUPPLY CURRENT IVIN Operating - non-switching supply current VIN current, TA = 25°C, EN = 5 V, VFB = 0.8 V 950 1400 μA IVINSDN Shutdown supply current VIN current, TA = 25°C, EN = 0 V 3.0 10 μA LOGIC THRESHOLD VENH EN high-level input voltage EN 1.6 V VENL EN low-level input voltage EN 0.6 V REN EN pin resistance to GND VEN = 12 V 225 450 900 k Ω VFB VOLTAGE AND DISCHARGE RESISTANCE VFBTH VFB threshold voltage TA = 25°C, VO = 1.05 V, continuous mode mode 757 765 773 mV TA = –40°C to 85°C, VO = 1.05 V, continuous mode mode(1) 751 765 779 IVFB VFB input current VFB = 0.8 V, TA = 25°C 0 ±0.1 μA VREG5 OUTPUT VVREG5 VREG5 output voltage TA = 25°C, 6.0 V < VIN < 18 V, 0 < IVREG5 < 5 mA 5.2 5.5 5.7 V VLN5 Line regulation 6 V < VIN < 18 V, IVREG5 = 5 mA 25 mV VLD5 Load regulation 0 mA < IVREG5 < 5 mA 100 mV IVREG5 Output current VIN = 6 V, VREG5 = 4.0 V, TA = 25°C 60 mA MOSFET RDS(on)h High side switch resistance (DDA) 25°C, VBST - SW = 5.5 V 70 m Ω High side switch resistance (DRC) 74 RDS(on)l Low side switch resistance 25°C 53 m Ω CURRENT LIMIT Iocl Current limit L out = 1.5 µH (1) 4.6 5.3 6.8 A |
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