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TPS54872PWP 데이터시트(PDF) 3 Page - Texas Instruments |
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TPS54872PWP 데이터시트(HTML) 3 Page - Texas Instruments |
3 / 22 page TPS54872 SLVS436C − JULY 2002 − REVISED FEBRUARY 2005 www.ti.com 3 ELECTRICAL CHARACTERISTICS TJ = –40°C to 125°C, VI = 4 V to 6 V (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SUPPLY VOLTAGE, VIN VIN Input voltage range 4.0 6.0 V fs = 350 kHz, RT open, PH pin open 11 15.8 I(Q) Quiescent current fs = 500 kHz, RT = 100 kΩ, PH pin open 16 23.5 mA I(Q) Quiescent current Shutdown, SS/ENA = 0 V 1 1.4 mA UNDER VOLTAGE LOCK OUT Start threshold voltage, UVLO 3.80 3.85 V Stop threshold voltage, UVLO 3.40 3.50 V Hysteresis voltage, UVLO 0.14 0.16 V Rising and falling edge deglitch, UVLO(1) 2.5 µs BIAS VOLTAGE Output voltage, VBIAS I(VBIAS) = 0 2.70 2.80 2.90 V Output current, VBIAS (2) 100 µA REGULATION Line regulation(1)(3) IL = 4 A, fs = 350 kHz, TJ = 85°C 0.04 %/V Load regulation(1)(3) IL = 0 A to 8 A, fs = 350 kHz, TJ = 85°C 0.03 %/A OSCILLATOR Internally set free running frequency RT open 280 350 420 kHz RT = 180 k Ω (1% resistor to AGND) 252 280 308 Externally set free running frequency range RT = 100 k Ω (1% resistor to AGND) 460 500 540 kHz Externally set free running frequency range RT = 68 k Ω (1% resistor to AGND) 663 700 762 kHz Ramp valley(1) 0.75 V Ramp amplitude (peak-to-peak)(1) 1 V Minimum controllable on time(1) 200 ns Maximum duty cycle(1) 90% ERROR AMPLIFIER Error amplifier open loop voltage gain 1 k Ω COMP to AGND(1) 90 110 dB Error amplifier unity gain bandwidth Parallel 10 k Ω, 160 pF COMP to AGND(1) 3 5 MHz Error amplifier common mode input voltage range Powered by internal LDO(1) 0 VBIAS V Input bias current, VSENSE VSENSE = Vref 60 250 nA Output voltage slew rate (symmetric), COMP 1.0 1.4 V/ µs PWM COMPARATOR PWM comparator propagation delay time, PWM comparator input to PH pin (excluding deadtime) 10-mV overdrive(1) 70 85 ns (1) Specified by design (2) Static resistive loads only (3) Specified by the circuit used in Figure 8 |
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