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TPS2420RSAR Datasheet(PDF) 3 Page - Texas Instruments |
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TPS2420RSAR Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 29 page  TPS2420 www.ti.com SLUS903E – JANUARY 2009 – REVISED MAY 2013 ELECTRICAL CHARACTERISTICS over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT INPUT SUPPLY (VIN) VUVLO Undervoltage lockout VIN increasing 2.6 2.85 2.9 V Hysteresis 150 mV Bias current V EN = 2.4 V 25 100 μA V EN = 0 V 3.9 5 mA INPUT/OUTPUT RON On-resistance RVIN-VOUT, IVOUT < IIMAX or 33 50 m Ω IVOUT < (ISET × 1.25), 1 A ≤ IVOUT ≤ 4.5 A PLIMIT Power limit VIN= 12 V, COUT = 1000 μF 3 5 7.5 W EN: 3V → 0 V Reverse diode voltage VOUT > VIN, EN = 5 V, IIN = –1 A 0.77 1.0 V FAULT CURRENT (FLT) I FLT Fault current threshold IVOUT increasing, ICT from sinking to sourcing, pulsed test R FLT = 200 kΩ 0.8 1 1.2 A R FLT = 100 kΩ 1.8 2 2.2 R FLT = 49.9 kΩ 3.6 4 4.4 CURRENT LIMIT (IMAX) IIMAX Current limit program RIMAX = 100 kΩ 1.6 2 2.4 IVOUT ↑ , RIMAX = 66.5 kΩ 2.6 3 3.4 A VVIN-VOUT = 0.3 V, pulsed RIMAX = 40.2 kΩ 4.6 5 5.4 test FAULT TIMER (CT) Charge/Discharge current ICT sourcing, VCT = 1 V, In current limit 29 35 41 μA ICT sinking, VCT = 1 V, drive CT to 1 V, measure 1.0 1.4 1.8 current Threshold voltage VCT increasing 1.3 1.4 1.5 V VCT decreasing 0.1 0.16 0.3 D ON/OFF fault duty cycle VVOUT = 0 V 2.8% 3.7% 4.6% ENABLE (EN) Threshold voltage V EN decreasing 0.8 1.0 1.5 V Hysteresis 50 150 250 mV Input bias current V EN = 2.4 V (sinking) –1.5 0 0.5 μA V EN = 0.2 V (sourcing) 2 1 0.5 Turn on propagation delay VIN = 3.3 V, ILOAD = 1 A, 350 500 V EN : 2.4 V → 0.2 V, VOUT: ↑ 90% × VIN μs Turn off propagation delay VIN = 3.3 V, ILOAD = 1 A, 30 50 V EN : 0.2 V → 2.4V, VOUT: ↓ 10% × VIN Copyright © 2009–2013, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: TPS2420 |
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