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TPS22949 Datasheet(PDF) 6 Page - Texas Instruments |
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TPS22949 Datasheet(HTML) 6 Page - Texas Instruments |
6 / 24 page TPS22949 TPS22949A SLVS908C – FEBRUARY 2009 – REVISED JANUARY 2010 www.ti.com CURRENT LIMITER ELECTRICAL CHARACTERISTICS over operating free-air temperature range, V+ = 3.3 V, EN1 = V+, EN2 = GND (unless otherwise noted) YZP PACKAGE DRG PACKAGE PARAMETER TEST CONDITIONS TA UNIT MIN TYP MAX MIN TYP MAX 25°C 0.3 0.4 0.4 0.5 VIN = 4.5 V Full 0.5 0.6 25°C 0.35 0.6 0.45 0.7 VIN = 3.3 V Full 0.7 0.8 25°C 0.4 0.7 0.5 0.8 rON ON-state resistance IOUT = 20 mA VIN = 2.5 V Ω Full 0.8 0.9 25°C 0.6 0.9 0.7 1 VIN = 1.8 V Full 1.0 1.1 25°C 0.7 1.0 0.8 1.1 VIN = 1.62 V Full 1.1 1.2 ILIM Current limit VOUT = 3 V VIN = 3.3 V Full 100 150 200 100 150 200 Power-ON inrush mA ILIM (INRUSH) current limit VOUT = 3 V VIN = 3.3 V Full 750 750 (TPS22949A only) Undervoltage UVLO-CL VIN increasing 1.39 1.49 1.59 1.39 1.49 1.59 V shutdown Undervoltage 30 30 mV shutdown hysteresis VIN = 4.5 V 0.1 0.3 0.1 0.3 OC output logic low ISINK = 10 mA Full V voltage VIN = 1.8 V 0.2 0.4 0.2 0.4 CURRENT LIMITER SWITCHING CHARACTERISTICS VIN = 3.3 V, TA = 25°C, RL = 500 Ω, CL = 0.1 μF (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT tON Turn-ON time RL = 500 Ω, CCL = 0.1 μF 95 μs tOFF Turn-OFF time RL = 500 Ω, CCL = 0.1 μF 2 μs tr VOUT rise time RL = 500 Ω, CCL = 0.1 μF 25 μs tf VOUT fall time RL = 500 Ω, CCL = 0.1 μF 10 μs tBLANK Overcurrent blanking time 6 12 18 ms tRSTRT Auto-restart time 40 80 120 ms Power-ON inrush current limit time tINRUSH RL = 500 Ω, CCL = 0.1 μF 150 μs (TPS22949A only) VIN = VEN1 = 3.3 V, moderate over-current condition 11 Short-circuit response time μs VIN = VEN1 = 3.3 V, hard short 5 6 Submit Documentation Feedback Copyright © 2009–2010, Texas Instruments Incorporated Product Folder Link(s): TPS22949 TPS22949A |
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