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TPS51124 Datasheet(PDF) 5 Page - Texas Instruments |
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TPS51124 Datasheet(HTML) 5 Page - Texas Instruments |
5 / 28 page TPS51124 www.ti.com SLVS616C – NOVEMBER 2005 – REVISED DECEMBER 2014 6.4 Electrical Characteristics over operating free-air temperature range, V5IN = V5FILT = 5 V (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SUPPLY CURRENT V5FILT current, no load, IV5FILT V5FILT supply current EN1 = EN2 = 5 V, VFB1 = VFB2 = 0.77 V, 350 700 μA LL1=LL2=0.5V IV5INSDN V5IN shutdown current V5IN current, no load, EN1 = EN2 = 0 V 1 μA IV5FILTSD V5FILT shutdown current V5FILT current, no load, EN1 = EN2 = 0 V 1 μA N VFB VOLTAGE and DISCHARGE RESISTANCE VVFB VFB regulation voltage FB voltage, skip mode (fPWM/10) 764 mV TA = 25°C, bandgap initial accuracy –0.9% 0.9% VFB regulation voltage VVFB TA = 0°C to 85°C (1) –1.3% 1.3% tolerance TA = –40°C to 85°C (1) –1.6% 1.6% VFB regulation shift in 0.758-V target for resistor divider. See PWM Operation of VVFBSKIP 758 mV continuous conduction Detailed Description(1) IVFB VFB input current VFBx = 0.758 V, absolute value 0.02 0.1 μA RDischg VO discharge resistance ENx = 0 V, VOx = 0.5 V, TA = 25°C 10 20 Ω OUTPUT: N-CHANEEL MOSFET GATE DRIVERS Source, VVBSTx–DRVHx = 0.5 V 5 7 Ω RDRVH DRVH resistance Sink, VDRVHx-LLx= 0.5 V 1.5 2.5 Ω Source, VV5IN–DRVLx = 0.5 V 4 6 Ω RDRVL DRVL resistance Sink, VDRVLx–PGNDx = 0.5 V 1 2.0 Ω DRVHx-low (DRVHx = 1 V) to DRVLx-on 10 20 50 ns (DRVLx = 4 V), LL = –0.05 V, TD Dead time DRVLx-low (DRVLx = 1 V) to DRVHx-on 30 40 60 ns (DRVHx = 4 V), LL = –0.05 V, INTERNAL BST DIODE VFBST Forward voltage VV5IN–VBSTx, IF = 10 mA, TA = 25°C 0.7 0.8 0.9 V VBST = 34 V, LL = 28 V, VOx = 5.5 V, IVBSTLK VBST leakage current 0.1 1 μA TA = 25°C ON-TIME TIMER CONTROL AND INTERNAL SOFT START, TON11 CH1, 240-kHz setting VO1 = 1.5 V,TONSEL = GND, LL1 = 12 V 440 500 560 ns TON12 CH1, 300-kHz setting VO1 = 1.5 V, TONSEL = FLOAT, LL1 = 12 V 340 390 440 ns TON13 CH1, 360-kHz setting VO1 = 1.5 V,TONSEL = V5FILT, LL1 = 12 V 265 305 345 ns TON21 CH2, 300-kHz setting VO2 = 1.05 V, TONSEL = GND, LL2 = 12 V 235 270 305 ns TON22 CH2, 360-kHz setting VO2 = 1.05 V, TONSEL = FLOAT, LL2 = 12 V 180 210 240 ns TON23 CH2, 420-kHz setting VO2 = 1.05 V, TONSEL = V5FILT, LL2 = 12 V 120 150 180 ns TON(MIN) CH2 On time VO2 = 0.76 V, TONSEL = V5FILT, LL2 = 28 V 80 110 140 ns TOFF(MIN) CH1/CH2 Min. off time LL = –0.1 V, TA= 25°C, VFB = 0.7 V 435 ns Internal soft start, time from ENx > 3 V to VFBx regulation value = Tss Internal SS time 0.85 1.2 1.40 ms 735 mV UVLO/LOGIC THRESHOLD Wake up 3.7 4.0 4.3 VUV5VFILT V5FILT UVLO threshold V Hysteresis 0.2 0.3 0.4 Wake up 1.0 1.3 1.5 VEN ENx threshold V Hysteresis 0.2 IEN ENx input current Absolute value(2) 0.02 0.1 μA (1) Specified by design. Not production tested. (2) Ensured by design. Not production tested. Copyright © 2005–2014, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: TPS51124 |
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