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TPS549A20RVET Datasheet(PDF) 6 Page - Texas Instruments |
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TPS549A20RVET Datasheet(HTML) 6 Page - Texas Instruments |
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6 / 47 page  6 TPS549A20 SLUSC79A – NOVEMBER 2015 – REVISED DECEMBER 2015 www.ti.com Product Folder Links: TPS549A20 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Electrical Characteristics (continued) over operating free-air temperature range, VDD = 12V, VREG = 5 V, VEN = 5 V (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT (3) Specified by design. Not production tested. SMPS FREQUENCY fSW VO switching frequency VIN = 12 V, VVO = 3.3 V, FS<2:0> = 000 250 kHz VIN = 12 V, VVO = 3.3 V, FS<2:0> = 001 300 VIN = 12 V, VVO = 3.3 V, FS<2:0> = 010 400 VIN = 12 V, VVO = 3.3 V, FS<2:0> = 011 500 VIN = 12 V, VVO = 3.3 V, FS<2:0> = 100 600 VIN = 12 V, VVO = 3.3 V, FS<2:0> = 101 750 VIN = 12 V, VVO = 3.3 V, FS<2:0> = 110 850 VIN = 12 V, VVO = 3.3 V, FS<2:0> = 111 1000 tON(min) Minimum on-time TA = 25°C (3) 60 ns tOFF(min) Minimum off-time TA = 25°C 175 240 310 ns INTERNAL BOOTSTRAP SW VF Forward Voltage VVREG–VBST, TA = 25°C, IF = 10 mA 0.15 0.25 V IVBST VBST leakage current TA = 25°C, VVBST = 33 V, VSW = 28 V 0.01 1.5 µA LOGIC THRESHOLD VENH EN enable threshold voltage 1.3 1.4 1.5 V VENL EN disable threshold voltage 1.1 1.2 1.3 V VENHYST EN hysteresis voltage 0.22 V VENLEAK EN input leakage current –1 0 1 µA SOFT-START tSS Soft-start time SST <1:0> = 00 1 ms SST <1:0> = 01 2 SST <1:0> = 10 4 SST <1:0> = 11 8 POWERGOOD COMPARATOR VPGTH PGOOD threshold PGOOD in from higher 104 108 111 % PGOOD in from lower 89 92 96 % PGOOD out to higher 113 116 120 % PGOOD out to lower 80 84 87 % |
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