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TPS51275BRUKT Datasheet(PDF) 5 Page - Texas Instruments |
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TPS51275BRUKT Datasheet(HTML) 5 Page - Texas Instruments |
5 / 31 page TPS51275, TPS51275B, TPS51275C www.ti.com SLUSB45B – JUNE 2012 – REVISED MARCH 2013 ELECTRICAL CHARACTERISTICS over operating free-air temperature range, VVIN= 12 V, VVO1= 5 V, VVFB1= VVFB2= 2 V, VEN1= VEN2= 3.3 V (unless otherwise noted) PARAMETER TEST CONDITION MIN TYP MAX UNIT SUPPLY CURRENT IVIN1 VIN supply current-1 TA = 25°C, No load, VVO1=0 V 860 μA IVIN2 VIN supply current-2 TA = 25°C, No load 30 μA IVO1 VO1 supply current TA = 25°C, No load, VVFB1= VVFB2=2.05 V 900 μA IVIN(STBY) VIN stand-by current TPS51275 TA = 25°C, No load, VVO1= 0 V, VEN1= VEN2= 0 V 95 μA TA = 25°C, No load, VVO1=0 V, VEN1=VEN2=0V ( IVIN(STBY) VIN stand-by current 180 μA TPS51275B/C) INTERNAL REFERENCE TA = 25°C 1.99 2.00 2.01 V VFBx VFB regulation voltage 1.98 2.00 2.02 V VREG5 OUTPUT TA = 25°C, No load, VVO1= 0 V 4.9 5.0 5.1 VVIN> 7 V , VVO1= 0 V, IVREG5< 100 mA 4.85 5.00 5.10 VVREG5 VREG5 output voltage V VVIN > 5.5 V , VVO1= 0 V, IVREG5< 35 mA 4.85 5.00 5.10 VVIN > 5 V, VVO1= 0 V, IVREG5< 20 mA 4.50 4.75 5.10 IVREG5 VREG5 current limit VVO1= 0 V, VVREG5= 4.5 V, VVIN= 7 V 100 150 mA RV5SW 5-V switch resistance TA = 25°C, VVO1= 5 V, IVREG5= 50 mA 1.8 Ω VREG3 OUTPUT No load, VVO1= 0 V, TA = 25°C 3.267 3.300 3.333 VVIN > 7 V , VVO1= 0 V, IVREG3< 100 mA 3.217 3.300 3.383 5.5 V < VVIN , VVO1= 0 V, IVREG3< 35 mA 3.234 3.300 3.366 0°C ≤ TA ≤ 85°C, VVIN > 5.5 V, VVO1 = 0 V, VVREG3 VREG3 output voltage V 3.267 3.300 3.333 IVREG3< 35 mA 0°C ≤ TA ≤ 85°C, VVIN > 5.5 V, VVO1 = 5 V, 3.267 3.300 3.333 IVREG3< 35 mA VVIN > 5 V, VVO1= 0 V, IVREG3< 35 mA 3.217 3.300 3.366 IVREG3 VREG3 current limit VVO1= 0 V, VVREG3= 3.0 V, VVIN= 7 V 100 150 mA DUTY CYCLE and FREQUENCY CONTROL fsw1 CH1 frequency(1) TA = 25°C, VVIN= 20 V 240 300 360 kHz fSW2 CH2 frequency(1) TA = 25°C, VVIN= 20 V 280 355 430 kHz tOFF(MIN) Minimum off-time TA = 25°C 200 300 500 ns MOSFET DRIVERS Source, (VVBST – VDRVH) = 0.25 V, (VVBST – VSW) = 5 V 3.0 RDRVH DRVH resistance Ω Sink, (VDRVH – VSW) = 0.25 V, (VVBST – VSW) = 5 V 1.9 Source, (VVREG5 – VDRVL) = 0.25 V, VVREG5 = 5 V 3.0 RDRVL DRVL resistance Ω Sink, VDRVL = 0.25 V, VVREG5= 5 V 0.9 DRVH-off to DRVL-on 12 tD Dead time ns DRVL-off to DRVH-on 20 INTERNAL BOOT STRAP SWITCH RVBST (ON) Boost switch on-resistance TA = 25°C, IVBST = 10 mA 13 Ω IVBSTLK VBST leakage current TA = 25°C 1 µA CLOCK OUTPUT RVCLK (PU) VCLK on-resistance (pull-up) TA = 25°C 10 Ω RVCLK (PD) VCLK on-resistance (pull-down) TA = 25°C 10 fCLK Clock frequency TA = 25°C 260 kHz (1) Ensured by design. Not production tested. Copyright © 2012–2013, Texas Instruments Incorporated Submit Documentation Feedback 5 |
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