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TPS54521RHLR Datasheet(PDF) 5 Page - Texas Instruments |
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TPS54521RHLR Datasheet(HTML) 5 Page - Texas Instruments |
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5 / 35 page  TPS54521 www.ti.com SLVS981 – JUNE 2010 ELECTRICAL CHARACTERISTICS (continued) TJ= –40°C to 125°C, VIN = 4.5V to 17V, PVIN = 1.6V to 17V (unless otherwise noted) DESCRIPTION CONDITIONS MIN TYP MAX UNIT THERMAL SHUTDOWN Thermal shutdown 140 150 °C Thermal shutdown hysteresis 5 °C TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK PIN) Minimum switching frequency Rrt = 240 k Ω (1%) 160 200 240 kHz Switching frequency Rrt = 100 k Ω (1%) 400 480 560 kHz Maximum switching frequency Rrt = 53 k Ω (1%) 765 900 1035 kHz Minimum pulse width 20 ns RT/CLK high threshold 2 V RT/CLK low threshold 0.8 V RT/CLK falling edge to PH rising edge delay Measure at 500 kHz with RT resistor in series 62 ns Switching frequency range (RT mode set point 200 900 kHz and PLL mode) PH (PH PIN) Minimum on time Measured at 90% to 90% of PH, TA = 25°C, IPH = 97 135 ns 2A Minimum off time BOOT-PH ≥ 3 V 0 ns BOOT (BOOT PIN) BOOT-PH UVLO 2.1 3 V SLOW START AND TRACKING (SS/TR PIN) SS charge current 2.3 mA SS/TR to VSENSE matching V(SS/TR) = 0.4 V 29 60 mV POWER GOOD (PWRGD PIN) VSENSE falling (Fault) 91 % Vref VSENSE rising (Good) 94 % Vref VSENSE threshold VSENSE rising (Fault) 109 % Vref VSENSE falling (Good) 106 % Vref Output high leakage VSENSE = Vref, V(PWRGD) = 5.5 V 30 100 nA Output low I(PWRGD) = 2 mA 0.3 V Minimum VIN for valid output V(PWRGD) < 0.5V at 100 mA 0.6 1 V Minimum SS/TR voltage for PWRGD valid 1.2 1.4 V Copyright © 2010, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Link(s) :TPS54521 |
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