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TPS54228 Datasheet(PDF) 5 Page - Texas Instruments |
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TPS54228 Datasheet(HTML) 5 Page - Texas Instruments |
5 / 29 page 5 TPS54228 www.ti.com SLVSAU1E – MAY 2011 – REVISED AUGUST 2016 Product Folder Links: TPS54228 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. 6.4 Thermal Information THERMAL METRIC(1) TPS54228 UNITS DDA (SO) D (SOIC) DRC (VSON) 8 PINS 8 PINS 10 PINS RθJA Junction-to-ambient thermal resistance 45.3 114.4 43.9 °C/W RθJC(top) Junction-to-case (top) thermal resistance 54.8 60.8 55.4 °C/W RθJB Junction-to-board thermal resistance 16.2 55.7 18.9 °C/W ψJT Junction-to-top characterization parameter 6.6 17.4 0.7 °C/W ψJB Junction-to-board characterization parameter 16 55.1 19.1 °C/W RθJC(bot) Junction-to-case (bottom) thermal resistance 8.5 — 5.3 °C/W (1) Not production tested. 6.5 Electrical Characteristics over operating free-air temperature range and 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 800 1200 µA IVINSDN Shutdown supply current VIN current, TA = 25°C, EN = 0 V 5 10 µA LOGIC THRESHOLD VEN EN high-level input voltage EN 1.6 V EN low-level input voltage EN 0.6 V REN EN pin resistance to GND VEN = 12 V 220 440 880 kΩ VFB VOLTAGE AND DISCHARGE RESISTANCE VFBTH VFB threshold voltage TA = 25°C, VO = 1.05 V, IO = 10 mA, Eco-Mode™ operation 770 mV TA = 25°C, VO = 1.05 V, continuous mode operation 749 765 781 mV 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 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 V, TA = 25°C 60 mA MOSFET RDS(on) High side switch resistance DDA and D packages 25°C, VBST – SW = 5.5 V 155 mΩ DRC package, 25°C, VBST – SW = 5.5 V 165 Low side switch resistance 25°C 108 Iocl Current limit DDA and DRC packages, L out = 2.2 µH(1) 2.5 3.3 4.7 A D package, L out = 2.2 µH(1) 2.3 3 4.5 A TSDN Thermal shutdown threshold Shutdown temperature(1) 165 °C Hysteresis(1) 35 tON On time VIN = 12 V, VO = 1.05 V 150 ns tOFF(MIN) Minimum off time TA = 25°C, VFB = 0.7 V 260 310 ns ISS Soft-start charge current VSS = 1 V 1.4 2 2.6 µA Soft-start discharge current VSS = 0.5 V 0.1 0.2 mA UVLO Undervoltage lockout threshold Wake up VREG5 voltage 3.45 3.75 4.05 V Hysteresis VREG5 voltage 0.13 0.32 0.48 |
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