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TPS40009DGQR Datasheet(PDF) 4 Page - Texas Instruments |
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TPS40009DGQR Datasheet(HTML) 4 Page - Texas Instruments |
4 / 28 page TPS40007 TPS40009 SLUS589B− NOVEMBER 2003 − REVISED FEBRUARY 2005 4 www.ti.com ELECTRICAL CHARACTERISTICS temperature range, TA = −40_C to 85_C, VDD = 5.0 V, TA = TJ; all parameters measured at zero power dissipation (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT OUTPUT DRIVER RHDHI HDRV pull-up resistance VBOOT−VSW = 3.3 V, ISOURCE = −100 mA 3 5.5 RHDLO HDRV pull-down resistance VBOOT − VSW = 3.3 V, ISINK = 100 mA 1.5 3 Ω RLDHI LDRV pull-up resistance VDD = 3.3 V, ISOURCE = −100 mA 3 5.5 RLDLO LDRV pull-down resistance VDD = 3.3 V, ISINK = 100 mA 1.0 2.0 tRLD LDRV rise time 15 35 tFLD LDRV fall time CLOAD = 1 nF 10 25 ns tRHD HDRV rise time CLOAD = 1 nF 15 35 ns tFHD HDRV fall time 10 25 PREDICTIVE DELAY VSWP Sense threshold to modulate delay time −350 mV TLDHD Maximum delay modulation range time LDRV OFF − to − HDRV ON 45 70 95 Predictive counter delay time per bit LDRV OFF − to − HDRV ON 2.8 4.3 6.2 ns THDLD Maximum delay modulation range HDRV OFF − to − LDRV ON 50 80 110 ns Predictive counter delay time per bit HDRV OFF − to − LDRV ON 3.0 4.8 6.6 SHUTDOWN VSD Shutdown threshold voltage Outputs OFF 0.21 0.26 0.31 V VEN Device active threshold voltage 0.25 0.29 0.35 V SOFTSTART ISS Soft-start source current Outputs OFF 2.0 3.7 5.4 µA VSS Soft-start voltage to begin VOUT start 0.35 0.65 0.95 V BOOTSTRAP RBOOT Bootstrap switch resistance VDD = 3.3 V 50 100 Ω RBOOT Bootstrap switch resistance VDD = 5 V 35 70 Ω VOUT PRE-BIAS Recommended VOUT pre-bias level as % of final regulation(1)(4) FB percent of 700 mV 90% SW NODE ISW Leakage current in shutdown 2 µA THERMAL SHUTDOWN tSD Shutdown temperature(1) 165 °C Restart from thermal shutdown(1) −15 °C (1) Ensured by design. Not production tested. (2) Derate the maximum duty cycle by 3% for VDD < 3 V. (3) Operating at PWM on-times of less than 100 ns could lead to overlap between HDRV and LDRV pulses. (4) Prebiased output greater than 90% of final regulation may lead to sinking current from the prebias output. |
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