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TPS51117PWR Datasheet(PDF) 3 Page - Texas Instruments |
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TPS51117PWR Datasheet(HTML) 3 Page - Texas Instruments |
3 / 22 page www.ti.com ELECTRICAL CHARACTERISTICS TPS51117 SLVS631 – DECEMBER 2005 over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SUPPLY CURRENT V5FILT + V5DRV current, PWM, EN_PSV = float, VFB IV5FILTPWM Supply current 400 750 µA = 0.77V, LL = –0.1 V V5FILT + V5DRV current, auto-skip, EN_PSV = 5 V, IV5FILTSKIP Supply current 250 470 µA VFB = 0.77V, LL = 0.5 V IV5DRVSDN V5DRV shutdown current V5DRV current, EN_PSV = 0 V 0 1 µA IV5FILTSDN V5FILT shutdown current V5FILT current, EN_PSV = 0 V 4.5 7.5 µA VOUT AND VFB VOLTAGES VOUT Output voltage Adjustable output range 0.75 5.5 V VVFB VFB regulation voltage 750 mV TA = 25°C, bandgap initial accuracy –0.9% 0.9% VFB regulation voltage VVFB_TOL TA = 0°C to 85°C –1.3% 1.3% tolerance TA = -40°C to 85°C –1.6% 1.6% IVFB VFB input current VFB = 0.75 V, absolute value 0.02 0.1 µA RDischg VOUT discharge resistance EN_PSV = 0 V, VOUT = 0.5 V 20 32 Ω ON-TIME TIMER AND INTERNAL SOFT START TONN Nominal on time VLL = 12 V, VOUT = 2.5 V, RTON = 250 kΩ 750 ns TONF Fast on time VLL = 12 V, VOUT = 2.5 V, RTON = 100 kΩ 264 330 396 ns TONS Slow on time VLL = 12 V, VOUT = 2.5 V, RTON = 400 kΩ 1169 ns TON(MIN) Minimum on time VOUT = 0.75 V, RTON = 100 kΩ to 28 V(1) 80 110 140 ns VFB = 0.7 V, LL = -0.1 V, TOFF(MIN) Minimum off time 440 ns TRIP = open Time from EN_PSV > 3 V to VFB regulation TSS Internal soft start time 0.82 1.2 1.5 ms value = 0.735 V OUTPUT DRIVERS Source, VVBST-DRVH = 0.5 V 5 7 Ω RDRVH DRVH resistance Sink, VDRVH-LL = 0.5 V 1.5 2.5 Ω Source, VV5DRV-DRVL = 0.5 V 5 7 Ω RDRVL DRVL resistance Sink, VDRVL-PGND = 0.5 V 1.5 2.5 Ω DRVH-low (DRVH = 1 V) to DRVL-high 10 20 50 ns (DRVL = 4 V), LL = –0.05 V TD Dead time DRVL-low (DRVL = 1 V) to DRVH-high 30 40 60 ns (DRVH = 4V), LL = –0.05 V INTERNAL BST DIODE VFBST Forward voltage VV5DRV-VBST, IF = 10 mA, TA = 25°C 0.7 0.8 0.9 V IVBSTLK VBST leakage current VBST = 34 V, LL = 28 V 0.1 1 µ A (1) Design constraint, ensure actual on-time is larger than the max value (i.e., design RTON such that the min tolerance is 100 kΩ). 3 |
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