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TPS51225C Datasheet(PDF) 6 Page - Texas Instruments |
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TPS51225C Datasheet(HTML) 6 Page - Texas Instruments |
6 / 31 page TPS51225, TPS51225B, TPS51225C SLUSAV0B – JANUARY 2012 – REVISED SEPTEMBER 2012 www.ti.com 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 OUTPUT DISCHARGE TA = 25°C, VVO1 = 0.5 V RDIS1 CH1 discharge resistance 35 Ω VEN1 = VEN2 = 0 V TA = 25°C, VSW2 = 0.5 V RDIS2 CH2 discharge resistance 75 Ω VEN1 = VEN2 = 0 V RDIS2 CH2 discharge resistance TA = 25°C, VSW2 = 0.5 V, VEN1 = VEN2 = 0 V (TPS51225C) 70 Ω SOFT START OPERATION tSS Soft-start time 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 Lower (rising edge of PG-in) 92.5% 95.0% 97.5% Hysteresis 5% VPGTH PG threshold Upper (rising edge of PG-out) 107.5% 110.0% 112.5% Hysteresis 5% IPGMAX PG sink current VPGOOD = 0.5 V 6.5 mA IPGLK PG leak current VPGOOD = 5.5 V 1 µA tPGDEL PG delay From PG lower threshold (95%=typ) to PG flag high 0.7 ms CURRENT SENSING ICS CS source current TA = 25°C, VCS= 0.4 V 9 10 11 μA TCCS CS current temperature coefficient(1) On the basis of 25°C 4500 ppm/°C VCS CS Current limit setting range 0.2 2 V VZC Zero cross detection offset TA = 25°C –1 1 3 mV 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 1 µA OUTPUT OVERVOLTAGE PROTECTION VOVP OVP trip threshold 112.5% 115.0% 117.5% tOVPDLY OVP propagation delay TA = 25°C 0.5 µs OUTPUT UNDERVOLTAGE PROTECTION VUVP UVP trip Threshold 55% 60% 65% tUVPDLY UVP prop delay 250 µs tUVPENDLY UVP enable delay From ENx ="Hi", VVREG5 = 5 V 1.35 ms UVLO Wake up 4.58 V VUVL0VIN VIN UVLO Threshold Hysteresis 0.5 V Wake up 4.38 V VUVLO5 VREG5 UVLO Threshold Hysteresis 0.4 V Wake up 3.15 V VUVLO3 VREG3 UVLO Threshold Hysteresis 0.15 V OVER TEMPERATURE PROTECTION Shutdown temperature 155 TOTP OTP threshold(1) °C Hysteresis 10 (1) Ensured by design. Not production tested. 6 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Links :TPS51225 TPS51225B TPS51225C |
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