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TPS51211DSCR Datasheet(PDF) 4 Page - Texas Instruments |
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TPS51211DSCR Datasheet(HTML) 4 Page - Texas Instruments |
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4 / 26 page  TPS51211 SLUSAA7 – NOVEMBER 2010 www.ti.com ELECTRICAL CHARACTERISTICS over recommended free-air temperature range, V5IN=5V. (Unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SUPPLY CURRENT TA = 25°C, No Load, IV5IN V5IN supply current 320 600 mA VEN = 5 V, VVFB = 0.735 V IV5INSDN V5IN shutdown current TA = 25°C, No Load, VEN = 0 V 1 mA INTERNAL REFERENCE VOLTAGE TA = 25°C 0.7005 0.7040 0.7075 VVFB VFB regulation voltage V –10°C ≤ TA ≤ 85°C 0.697 0.704 0.711 IVFB VFB input current VVFB = 0.735 V, TA = 25°C 0.01 0.2 mA OUTPUT DISCHARGE Output discharge current from IDischg VEN = 0 V, VSW = 0.5 V 5 13 mA SW pin OUTPUT DRIVERS Source, IDRVH = –50 mA 1.5 3.6 RDRVH DRVH resistance Sink, IDRVH = 50 mA 0.7 2.0 Ω Source, IDRVL = –50 mA 1.0 3.0 RDRVL DRVL resistance Sink, IDRVL = 50 mA 0.5 1.6 DRVH-off to DRVL-on 7 17 tD Dead time ns DRVL-off to DRVH-on 10 22 BOOT STRAP SWITCH VFBST Forward voltage VV5IN-VBST, IF = 10 mA, TA = 25°C 0.1 0.2 V IVBSTLK VBST leakage current VVBST = 34.5 V, VSW = 28 V, TA = 25°C 0.01 1.5 mA DUTY AND FREQUENCY CONTROL tOFF(min) Minimum off-time TA = 25°C 150 260 400 ns tON(min) Minimum on-time VIN = 28 V, VOUT = 0.7 V, TA = 25°C (1) 79 SOFTSTART tss Internal SS time From VEN = high to VOUT = 95% 1 ms POWERGOOD PG in from lower 92.5% 95% 97.5% VTHPG PG threshold PG in from higher 107.5% 110% 112.5% PG hysteresis 2.5% 5% 7.5% IPGMAX PG sink current VPGOOD = 0.5 V 3 6 mA tPGDEL PG delay Delay for PG in 0.8 1 1.2 ms LOGIC THRESHOLD AND SETTING CONDITIONS Enable 1.8 VEN EN voltage threshold V Disable 0.5 IEN EN input current VEN = 5V 1.0 mA fSW Switching frequency TA = 25°C (2) 266 290 314 kHz (1) Ensured by design. Not production tested. (2) Not production tested. Test condition is VIN= 8 V, VOUT= 1.1 V, IOUT = 10 A using application circuit shown in Figure 18. 4 Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated |
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