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TPS51312 Datasheet(PDF) 3 Page - Texas Instruments |
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TPS51312 Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 21 page  TPS51312 www.ti.com SLUSB57 – SEPTEMBER 2012 ELECTRICAL CHARACTERISTICS Over operating free-air temperature range, VIN = 5 V, VCC = 5 V, VEN = 3.3 V (unless otherwise noted). PARAMETER TEST CONDITION MIN TYP MAX UNIT SUPPLY VOLTAGE VIN Supply voltage 3.1 5.5 V VCC Supply voltage 3.1 5.5 V SUPPLY CURRENT IIN Input voltage supply current EN = High 100 μA ISD Input voltage shutdown current EN = Low 12 μA IVCC(in) VCC supply current EN = High 700 μA IVCC(sd) VCC shutdown current EN = Low, TA = 25°C 20 μA VFB REFERNCE VOLTAGE VFBREF Reference voltage 0.6 V VFBREFTOL Reference voltage tolerance TA = 25°C –1% 1% IFB Feedback pin leakage current –100 100 nA SMPS FREQUENCY fSW Switching frequency 0.9 MHz tOFF(min) Minimum off-time 110 190 270 ns SW node high, VIN = 5 V 9 tDEAD Dead time(1) ns SW node low, VIN = 5 V 10 LOGIC THRESHOLD AND CURRENT VLL EN low-level voltage 0.8 V VLH EN high-level voltage 1.5 V ILLK EN input leakage current VIN = VCC = 3.3 V –3 1 3 µA MOSFET RDS(on)_H VIN = 5 V 81 On-resistance(1) m Ω RDS(on)_L VIN = 5 V 41 SOFT-START tSS Soft-start time(1) VFB rising from 0 V to 0.6 V 300 µs PGOOD COMPARATOR PGOOD out to higher w/r/t VFB 130% VPGTH PGOOD threshold PGOOD out to lower w/r/t VFB 50% tPGDLY PGOOD high delay time Delay for PGOOD in, after EN = Hi 1.3 ms IPGLK PGOOD leakage current –1 0 1 μA PROTECTIONS Valley current limit, VIN = VCC = 3.3 V, IOCL Current limit threshold 4.8 A TA = 25°C Wake-up 2.85 2.95 3.05 VIN_UVLO VIN UVLO threshold voltage V Shutdown 2.6 2.7 2.8 Wake-up 2.85 2.95 3.05 VCC_UVLO VCC UVLO threshold voltage V Shutdown 2.6 2.7 2.8 VOVP OVP threshold voltage OVP detect 130% tOVP OVP delay time Overdrive = 100 mV 1.9 µs VUVP UVP threshold voltage UVP detect 50% tUVPDLY UVP delay time Overdrive = 100 mV 2.4 µs (1) Specified by design. Not production tested. Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links :TPS51312 |
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