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TPS51285BRUKT Fiches technique(PDF) 7 Page - Texas Instruments |
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TPS51285BRUKT Fiches technique(HTML) 7 Page - Texas Instruments |
7 / 32 page TPS51285A TPS51285B www.ti.com SLVSBX0 – APRIL 2013 ELECTRICAL CHARACTERISTICS (continued) over operating free-air temperature range, VVIN = 12 V, VVO1 = 5 V, VVFB1 = VVFB2 = 2 V, VEN1 = VEN2 = 3.3 V, VCLK: 200 Ω to GND (unless otherwise noted) PARAMETER TEST CONDITION MIN TYP MAX UNIT OUTPUT DISCHARGE TA = 25°C, VVO1 = 0.5 V RDIS1 CH1 discharge resistance 35 Ω VEN1 = VEN2 = 0 V TPS51285A 75 RDIS2 CH2 discharge resistance TA = 25°C, VSW2 = 0.5 V, VEN1 = VEN2 = 0 V Ω TPS51285B 70 SOFT START tSS Soft-start time (From ENx Hi) From ENx="Hi" and VVREG5 > VUVLO5 to VOUT = 95% 0.91 ms tSSRAMP Soft-start time (ramp-up) VOUT= 0% to VOUT = 95%, VVREG5 = 5 V 0.78 ms POWER GOOD tPGDEL PG start-up delay From EN1 = "Hi", EN2 = "Hi", and VVREG5 > VUVLO5 1.65 ms VPGTH PG threshold PGOOD in from lower (start-up) 87.5% 90% 92.5% IPGMAX PG sink current VPGOOD = 0.5 V 6.5 mA IPGLK PG leak current VPGOOD = 5.5 V 1 µA CURRENT SENSING ICS CS source current TA = 25°C, VCS = 0.4 V 45 50 55 µA TCCS CS current temperature coefficient (2) On the basis of 25°C 4500 ppm/°C VCS CS Current limit setting range 0.2 2 V Positive 5 10 VAZCADJ Adaptive zero cross adjustable range mV Negative –10 –5 LOGIC THRESHOLD VENX(ON) EN threshold high-level SMPS on level 1.6 V VENX(OFF) EN threshold low-level SMPS off level 0.3 V IEN EN input current VENx= 3.3 V 1 µA OUTPUT OVERVOLTAGE PROTECTION VOVP OVP trip threshold 112.5% 115% 117.5% tOVPDLY OVP propagation delay TA = 25°C 0.5 µs OUTPUT UNDERVOLTAGE PROTECTION VUVP UVP trip Threshold 55% 60% 65% VUVP-ST UVP trip Threshold Start Up 87.5% 90% 92.5% tUVPDLY UVP prop delay 250 µs tUVPENDLY UVP enable delay From ENx ="Hi", VVREG5 = 5V 1.1 ms UVLO Wake up 4.2 4.58 4.95 V VUVL0VIN VIN UVLO Threshold Shutdown 3.75 4.1 4.45 V Wake up 4.08 4.38 4.55 V VUVLO5 VREG5 UVLO Threshold Shutdown 3.7 4 4.3 V Wake up 3 3.15 3.26 V VUVLO3 VREG3 UVLO Threshold Shutdown 2.75 3 3.21 V (2) Specified by design. Not production tested. Copyright © 2013, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: TPS51285A TPS51285B |
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