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TPS40041DRBT Datasheet(PDF) 3 Page - Texas Instruments |
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TPS40041DRBT Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 36 page  www.ti.com ELECTRICAL CHARACTERISTICS TPS40040, TPS40041 SLUS700B – MARCH 2006 – REVISED MARCH 2006 T J = -40 °C to 85°C VDD = 5 V, (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Input Supply VDD Input voltage range 2.25 5.5 V IDDsd Shutdown EN = VDD 100 180 µA IDDq Quiescent FB = 0.8 V 1.0 2.0 mA IDDs Switching current No load at HDRV/LDRV 2.0 UVLOON Minimum turn-on voltage 1.95 2.05 2.15 V UVLOHYS Hysteresis 80 130 200 mV Oscillator/ Ramp Generator fPWM TPS40040 PWM frequency 2.25 V < VDD < 5.5 V 250 300 350 kHz fPWM TPS40040 PWM frequency VDD = 5.0 V, 0 °C < T J < 70°C 270 300 330 kHz fPWM TPS40041 PWM frequency 2.25 V < VDD < 5.5 V 500 600 700 kHz fPWM TPS40041 PWM frequency VDD = 5.0 V, 0 °C < T J < 70°C 540 600 660 kHz VRAMP Ramp amplitude PP VPEAK– VVALLEY 0.75 0.87 1.0 V VVALLEY Ramp valley voltage 0.37 V PWM MAXDUTY Maximum duty cycle, TPS40040 VFB = 0 V, 2.25 V < VDD < 5.5 V 90 95 Maximum duty cycle, TPS40041 VFB = 0 V, 2.25 V < VDD < 5.5 V 88 95 % MINDUTY Minimum duty cycle 0 MIN pulse Minimum width control range before Minimum controllable pulse width 90 150 ns width (1) jumping to zero. Error Amplifier VDD = 5.0 V, 0 °C < T J < 70°C 593.5 600.0 606.5 VFB FB input voltage mV 2.25 V < VDD < 5.5 V, -40 °C < T J < 590 610 125 °C IFB FB input bias current 50 150 nA IOH = 0.5 mA, VFB = 0 V, VDD = 5.5 VOH High level output voltage 2.0 2.5 V V VOL Low level output voltage IOL = 0.5 mA, VFB = VDD 80 150 mV IOH Output source current VCOMP = 0.7 V, VFB = GND 1 6 mA IOL Output sink current VCOMP = 0.7 V, VFB = VDD 2 8 GBW(1) Gain bandwidth 5 10 MHz AOL Open loop gain 55 85 dB Short Circuit Protection Resistor COMP to GND = 2.4 k Ω, T J TH1 Low short circuit threshold voltage 80 105 130 = 25 °C Medium short circuit threshold Default: No resistor COMP to GND, VTH2 145 180 215 mV voltage TJ = 25°C Resistor COMP to GND = 12 k Ω, T J VTH3 High short circuit threshold voltage 250 310 370 = 25 °C VTH(tc)(1) Threshold temperature coefficient 3100 ppm Minimum HDRV pulse time in over tON(oc)(1) 200 current ns tSWOCblank SW leading edge blanking pulse in 100 (1) over current detection tHICCUP Hiccup time between restarts 40 ms (1) Ensured by design. Not production tested. 3 |
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