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TPS54617 Fiches technique(PDF) 3 Page - Texas Instruments |
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TPS54617 Fiches technique(HTML) 3 Page - Texas Instruments |
3 / 22 page PACKAGE DISSIPATION RATINGS (1) ELECTRICAL CHARACTERISTICS TPS54617 www.ti.com ........................................................................................................................................... SLVS880A – NOVEMBER 2008 – REVISED JANUARY 2009 THERMAL IMPEDANCE THERMAL IMPEDANCE PACKAGE JUNCTION-TO-AMBIENT JUNCTION-TO-CASE 34-Pin RUV with solder 14.5°C/W 0.5 °C/W(2) (1) Test board conditions: a. 3 inch × 3 inch, 4 layers, Thickness: 0.062 inch b. 2.0 oz copper traces located on the top of the PCB c. 2.0 oz copper ground plane on the bottom of the PCB d. 2.0 oz copper ground planes on the 2 internal layers e. 12 thermal vias (2) Maximum power dissipation may be limited by overcurrent protection. TJ = –40°C to 125°C, VI = 3 V to 6 V (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SUPPLY VOLTAGE, VIN VIN input voltage range 3 6 V fs = 350 kHz, SYNC ≤ 0.8 V, RT open, PH pin open 9.2 15.8 Quiescent current fs = 550 kHz, SYNC ≥ 2.5 V, RT open, PH pin open 13.9 23.5 mA Shutdown, SS/ENA = 0 V 1 1.4 UNDER VOLTAGE LOCK OUT Start threshold voltage, UVLO 2.95 3.0 V Stop threshold voltage, UVLO 2.70 2.80 Hysteresis voltage, UVLO 0.16 V Rising and falling edge deglitch, 2.5 µs UVLO(1) BIAS VOLTAGE Output voltage, VBIAS I(VBIAS) = 0 2.70 2.80 2.90 V VO Output current, VBIAS(2) 100 µA CUMULATIVE REFERENCE Vref Accuracy 0.882 0.891 0.900 V REGULATION IL = 3 A, fs = 350 kHz, TJ = 85°C 0.04 Line regulation(1) %/V IL = 3 A, fs = 550 kHz, TJ = 85°C 0.04 IL = 0 A to 6 A, fs = 350 kHz, TJ = 85°C 0.03 Load regulation(1) %/A IL = 0 A to 6 A, fs = 550 kHz, TJ = 85°C 0.03 OSCILLATOR SYNC ≤ 0.8 V, RT open 280 350 420 Internally set free-running frequency kHz range SYNC ≥ 2.5 V, RT open 440 550 660 RT = 100 k Ω (1% resistor to AGND) 460 500 540 Externally set free-running frequency kHz range RT = 27 k Ω (1% resistor to AGND) 1480 1600 1720 High-level threshold voltage, SYNC 2.5 V Low-level threshold voltage, SYNC 0.8 V Pulse duration, SYNC(1) 50 Frequency range, SYNC 330 1600 kHz Ramp valley(1) 0.75 V Ramp amplitude (peak-to-peak)(1) 1 V Minimum controllable on time 160 ns Maximum duty cycle 90% (1) Specified by design (2) Static resistive loads only Copyright © 2008–2009, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Link(s) :TPS54617 |
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