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TPS40222DRPRG4 Fiches technique(PDF) 3 Page - Texas Instruments |
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TPS40222DRPRG4 Fiches technique(HTML) 3 Page - Texas Instruments |
3 / 26 page www.ti.com ELECTRICAL CHARACTERISTICS TPS40222 SLUS642A – OCTOBER 2005 – REVISED JANUARY 2006 T J = -40°C to 125°C, 4.5 ≤ VAVIN = VPVIN≤ 5.5 V (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT FEEDBACK VOLTAGE TJ = 25°C, No load 792 800 808 VFB Feedback voltage mV -40°C ≤ T J≤ 125°C, No load, 788 812 4.5V ≤ V DD≤ 7 V IFB Feedback input bias current VFB = 0.9 V, VAVIN = VPVIN = 5 V 30 100 nA SOFT-START tSS Soft-start time VAVIN = VPVIN = 5 V 300 550 850 µs Gm AMPLIFIER Gm Transconductance(1) 10 µS GBW Gain bandwidth product(1) 12 MHz OSCILLATOR fSW Switching frequency VFB > 0.7 V 1.00 1.25 1.50 MHz fSWFB Minimum foldback frequency Startup/Overcurrent, VFB = 0 V 75 140 kHz Foldback frequency slope(1) 0 V < VFB < 0.4 V 2200 Hz/mV VFFB Frequency foldback VFB threshold voltage(1) 0.4 0.6 V OVERCURRENT DETECTION ICL Overcurrent threshold VAVIN = VPVIN = 5 V 2.1 2.6 3.1 A tON Minimum on-time in overcurrent(1) 90 200 ns HIGH SIDE MOSFET AND DRIVER TJ = 25°C 250 RDS(on) Drain-to-source on-resistance m Ω -40°C ≤ T J≤ 125°C 250 550 DMAX Maximum duty cycle 90% 97% ISWL MOSFET SW leakage current VPVIN = 10 V -10 -30 µA IBOOST Boost current ISW = 100 mA, VAVIN = VPVIN = 5 V 0.5 1.0 mA Boost diode voltage drop IDIODE ≤ 5 mA 0.9 V UNDERVOLTAGE LOCKOUT (UVLO) VON Turn-on voltage 3.6 3.8 4.0 V VHYST Hysteresis voltage 0.4 IQ AVIN quiescent current 1.0 1.5 mA THERMAL SHUTDOWN Thermal shutdown voltage(1) 150 °C Thermal hysteresis(1) -10 (1) Ensured by design. Not production tested. 3 |
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Description similaire - TPS40222DRPRG4 |
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