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TPS43000 Datasheet(PDF) 5 Page - Texas Instruments |
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TPS43000 Datasheet(HTML) 5 Page - Texas Instruments |
5 / 31 page TPS43000 SLUS489 − OCTOBER 2001 5 www.ti.com electrical characteristics over recommended operating junction temperature range, TA = −40_C to 85_C for the TPS43000, RT = 75 kΩ (500 kHz), VIN = VP = 3.5 V, VOUT = 3.1 V, COMP/FB pins shorted, BUCK-configured, TA = TJ (unless otherwise noted) PWM PARAMETER TEST CONDITIONS MIN TYP MAX UNIT BUCK threshold voltage BUCK configured if VBUCK > 1 V 0.4 0.7 1.0 V BUCK pull-down current BUCK configured if VBUCK > 1 V 0.5 1.0 µA BUCK maximum duty cycle VFB = 0 V 100% BOOST maximum duty cycle BUCK grounded, VFB = 0 V 70% 90% Minimum duty cycle VFB = 2 V 0% CCM threshold voltage Continuous conduction allowed if 0.4 0.7 1.0 V CCM pull-down current Continuous conduction allowed if VCCM > 1 V 0.5 1.0 µA BUCK rectifier zero current threshold voltage Measured from SWP to GND −28 −12 0 mV BOOST rectifier zero current threshold voltage Measured from SWP to VOUT, BUCK grounded 0 14 32 mV Delay to termination of P-channel gate drive time Measured at PDRV, BUCK grounded 200 300 ns pulsed frequency modulation PARAMETER TEST CONDITIONS MIN TYP MAX UNIT PFM threshold voltage PFM mode not allowed if PFM > 1 V 0.4 0.7 1.0 V PFM pull-down current PFM mode not allowed if PFM > 1 V 0.5 1.0 µA FB voltage to awaken (exit sleep mode) 768 784 800 mV Izero pulses required to enter sleep 5 7 9 Start-up delay time after sleep 2 5 µs low power mode PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VOUT threshold voltage to enter low power mode VP = VIN = 5 V 3.45 3.60 3.80 VIN threshold voltage to enter low power mode VP = VOUT = 5 V, BUCK grounded (boost configured) 3.45 3.60 3.80 V Hysteresis voltage to exit low power mode VOUT < (VTHRESHOLD−VHYST), VP = VIN = 5 V 225 312 415 Hysteresis voltage to exit low power mode VIN < (VTHRESHOLD−VHYST), BUCK grounded, VP = VOUT = 5 V 225 312 415 mV |
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