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TPS51427RHBT Datasheet(PDF) 4 Page - Texas Instruments |
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TPS51427RHBT Datasheet(HTML) 4 Page - Texas Instruments |
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4 / 41 page  ELECTRICAL CHARACTERISTICS TPS51427 SLUS819A – APRIL 2008 – REVISED MAY 2008 .............................................................................................................................................................. www.ti.com Over recommended free-air temperature range, VV5DRV = 5 V, VVIN = 12 V (unless otherwise noted). PARAMETER TEST CONDITIONS MIN TYP MAX UNIT INPUT SUPPLIES VIN Input Voltage Range LDO in regulation 5.5 28 V VIN Operating Supply Current LDO switched over to VSW, 4.5-V to 5.5-V SMPS 5 10 µA 5.5 V ≤ VVIN ≤ 28 V, TA = +25°C, no load, EN_LDO = 5 VIN Standby Current 115 150 µA V, EN1 = EN2 = VSW = 0 V 5.5 V ≤ VVIN ≤ 28 V, TA = +25°C, no load, EN_LDO = VIN Shutdown Current 12 20 µA EN1 = EN2 = VSW = 0 V TA = +25°C, no load, EN_LDO = EN1 = EN2 = REFIN2 Quiescent Power Consumption = 5 V, VFB1 = SKIPSEL = 0 V, VOUT1 = VSW = 5.3 V, 5 7 mW VOUT2 = 3.5 V PWM CONTROLLERS 5-V Preset output: 5.5 V ≤ VVIN ≤ 28 V, 4.975 5.125 5.05 VFB1 = 0 V, SKIPSEL = 5 V (–1.5%) (+1.5%) 1.5-V Preset output: 5.5 V ≤ VVIN ≤ 28 V, 1.482 1.518 VOUT1 Output Voltage Accuracy 1.50 V VFB1 = 5V, SKIPSEL = 5V (–1.2%) (+1.2%) Adjustable feedback output, 0.693 0.707 0.70 5.5 V ≤ VVIN ≤ 28 V, SKIPSEL = 5 V (–1%) (+1%) VOUT1 Voltage Adjust Range 0.707 5.900 V 5-V Preset output 0.20 V VFB1 Threshold Voltage 1.5-V Preset output 3.90 V VFB1 Input Current VFB1 = 0.8 V –0.20 0.20 µA 3.285 3.375 3.3-V Preset output: REFIN2 = 5 V, 5.5 V ≤ VVIN ≤ 28 V, 3.33 SKIPSEL = 5 V (–1.4%) (+1.4%) 1.038 1.062 1.05-V Preset output: REFIN2 = 3.3 V, VOUT2 Output Voltage Accuracy 1.05 V 5.5 V ≤ VVIN ≤ 28 V, SKIPSEL= 5 V (-1.2%) (+1.2%) 0.99 1.01 Tracking output: REFIN2 = 1.0 V, 5.5 V ≤ VVIN ≤ 28 V, 1.00 SKIPSEL = 5 V (-1%) (+1%) REFIN2 Voltage Adjust Range 0.50 2.50 V REFIN2 Input Current 0.5 V ≤ VVREFIN2 ≤ 2.5 V –0.2 0.2 µA 1.05-V Preset output 3.00 3.45 REFIN2 Threshold Voltage V 3.3-V Preset output 3.90 Either SMPS, SKIPSEL = 5 V, 0 A to 5 A(1) –0.10% DC Load Regulation Either SMPS, SKIPSEL = 2 V, 0 A to 5 A(1) –2.20% Either SMPS, SKIPSEL = GND, 0 A to 5 A(1) –0.50% Line Regulation Either SMPS, 5.5 V < VIN < 28 V(1) 0.005 %/V TONSEL = 0 V, 2 V, or OPEN (400 kHz), 895 1052 1209 VOUT1 = 5.05 V Channel1 On-Time ns TONSEL = 5 V (200 kHz), VOUT1 = 5.05 V 1895 2105 2315 TONSEL = 0 V (500 kHz), VOUT2 = 3.33 V 475 555 635 Channel2 On-Time ns TONSEL = 2 V, OPEN, or 5 V (300 kHz), 833 925 1017 VOUT2 = 3.33 V Minimum Off-Time 300 400 475 ns Soft Start Ramp Time Zero to full limit 1.8 ms VOUT1, VOUT2 Discharge On EN1 = EN2 = 0 V, VOUT1 = VOUT2 = 0.5 V 17 35 Ω Resistance OOA Operating Frequency SKIPSEL = 2 V or OPEN 22 30 kHz (1) Ensured by design. Not production tested. 4 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): TPS51427 |
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