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TPS51427ARHBRG4 Datasheet(PDF) 5 Page - Texas Instruments |
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TPS51427ARHBRG4 Datasheet(HTML) 5 Page - Texas Instruments |
5 / 42 page TPS51427A www.ti.com .................................................................................................................................................. SLUS843B – MAY 2008 – REVISED SEPTEMBER 2008 ELECTRICAL CHARACTERISTICS (continued) Over recommended free-air temperature range, VV5DRV = 5 V, VVIN = 12 V (unless otherwise noted). PARAMETER TEST CONDITIONS MIN TYP MAX UNIT LINEAR REGULATOR (LDO) 4.94 5.11 LDOREFIN = VSW = 0 V, 0 < ILDO < 10 0mA, 5.025 6 V< VIN< 28 V (–1.7%) (+1.7%) 3.28 3.38 LDOREFIN = 5 V, VSW = 0 V, 0 < ILDO < 100 mA, LDO Output Voltage 3.33 V 5.5 V < VIN < 28 V (–1.5%) (+1.5%) 0.98 1.02 LDOREFIN = 0.5 V, VSW = 0 V, 0 < ILDO < 50 mA, 1.00 5.5V < VIN < 28 V (–2%) (+2%) LDOREFIN Input Range VLDO = 2 × VLDOREFIN 0.35 2.25 V LDOREFIN Leakage Current VLDOREFIN = 0 V or 5 V –0.5 0.5 µA Fixed LDO = 5 V 0.15 LDOREFIN Threshold Voltage V Fixed LDO = 3.3 V 3.90 LDO Output Current VSW = GND , VIN = 5.5 V to 28 V 100 mA LDO Output Current During VSW = 5 V , VIN = 5.5 V to 28 V, LDOREFIN = 0 V 340 500 mA Switchover to 5 V LDO Output Current During VSW = 3.3 V , VIN = 5.5 V to 28 V, LDOREFIN = 5 V 330 500 mA Switchover to 3.3 V LDO Short-Circuit Current VSW = LDO = 0 V 140 180 220 mA 4.63 4.78 4.93 Rising edge of VSW, LDOREFIN = 0 V (92.6%) (95.6%) (98.6%) LDO 5-V Switchover Threshold V Hysteresis 0.20 3.05 3.15 3.25 Rising edge of VSW, LDOREFIN = 5 V (92.5%) (95.5%) (98.5%) LDO 3.3-V Switchover Threshold V Hysteresis 0.150 LDO Switchover Switch On LDO to VSW, VSW = 5 V, ILDO = 100 mA 0.7 1.5 Ω Resistance LDO Switchover Delay Turning on 3.96 ms Falling edge of V5FILT 3.80 3.93 4.10 LDO Undervoltage Lockout V Threshold Rising edge of V5FILT 4.20 4.37 4.50 Falling edge of VIN 1.8 VIN POR Threshold V Rising edge of VIN 2.1 Thermal-Shutdown Threshold Hysteresis = +10°C (2) +140 °C 3.3V ALWAYS-ON LINEAR REGULATOR (VREF3) 3.250 3.350 No external load, VVSW > 4.5 V 3.300 (–1.5%) (+1.5%) VREF3 Output Voltage V 3.220 3.380 No external load, VVSW < 4.0 V 3.300 (–2.4%) (+2.4%) VREF3 Load Regulation 0 mA < ILOAD < 10 mA 60 mV VREF3 Current Limit VREF3 = GND 15 20 mA Falling edge of VREF3 2.96 VREF3 Undervoltage Lockout V Threshold Hysteresis 0.17 (2) Ensured by design. Not production tested. Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Link(s): TPS51427A |
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