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TPS65251 Datasheet(PDF) 7 Page - Texas Instruments |
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TPS65251 Datasheet(HTML) 7 Page - Texas Instruments |
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7 / 31 page  TPS65251 www.ti.com SLVSAA4B – JUNE 2010 – REVISED JANUARY 2011 ELECTRICAL CHARACTERISTICS (continued) TJ = -40°C to 125°C, VIN = 12 V, fSW = 1 MHz (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Line regulation - DC VINB = 4.5 V to 18 V, VLINEREG 0.5 % VOUT ∆VOUT/∆VINB IOUT = 1000 mA Load regulation - DC IOUT = 10 % - 90% VLOADREG 0.5 % VOUT/A ∆VOUT/∆IOUT IOUT,MAX ILIMIT1 Peak inductor current limit range 1 4 A ILIMIT2 Peak inductor current limit range 1 3 A ILIMIT3 Peak inductor current limit range 1 3 A MOSFET (BUCK 1) Turn-On resistance high side FET on H.S. Switch VIN = 12 V, TJ = 25°C 95 m Ω CH1 Turn-On resistance low side FET on L.S. Switch VIN = 12 V, TJ = 25°C 50 m Ω CH1 MOSFET (BUCK 2) Turn-On resistance high side FET on H.S. Switch VIN = 12 V, TJ = 25°C 120 m Ω CH2 Turn-On resistance low side FET on L.S. Switch VIN = 12 V, TJ = 25°C 80 m Ω CH2 MOSFET (BUCK 3) Turn-On resistance high side FET on H.S. Switch VIN = 12 V, TJ = 25°C 120 m Ω CH3 Turn-On resistance low side FET on L.S. Switch VIN = 12 V, TJ = 25°C 80 m Ω CH3 ERROR AMPLIFIER gM Error amplifier transconductance –2 µA < ICOMP < 2 µA 130 µmhos gmPS COMP to ILX gM ILX = 0.5 A 10 A/V POWER GOOD RESET GENERATOR Output falling (device will be 85 disabled after tON_HICCUP ) Threshold voltage for buck under VUVBUCKX % voltage Output rising (PG will be 90 asserted) tUV_deglitch Deglitch time (both edges) Each buck 11 ms tON_HICCUP Hiccup mode ON time VUVBUCKX asserted 12 ms All converters disabled. Once Hiccup mode OFF time before tOFF_HICCUP elapses, all tOFF_HICCUP 15 ms re-start is attempted converters will go through sequencing again. Output rising (high side fet will 109 be forced off) Threshold voltage for buck over VOVBUCKX % voltage Output falling (high side fet will 107 be allowed to switch ) Measured after minimum reset tRP minimum reset period period of all bucks power-up 1 s successfully THERMAL SHUTDOWN TTRIP Thermal shut down trip point Rising temperature 160 °C THYST Thermal shut down hysteresis Device re-starts 20 °C TTRIP_DEGLITCH Thermal shut down deglitch 110 µs Copyright © 2010–2011, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Link(s): TPS65251 |
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