MAX1931 datasheet(5/8 Pages) MAXIM

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Current-Limited Switch for Single USB Port

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Typical Operating Characteristics (continued)

(VIN = 5V, TA = +25°C, unless otherwise noted.)

2ms/div

CURRENT-LIMIT AND FAULT RESPONSE

CH1 = VIN, 200mV/div, AC-COUPLED; CH2 = VOUT,

5V/div; CH3 = VFAULT, 5V/div; CH4 = IOUT, 500mA/div

µs/div

CURRENT-LIMIT RESPONSE

CH1 = VIN, 200mV/div, AC-COUPLED; CH2 = VOUT,

5V/div; CH3 = VFAULT, 5V/div; CH4 = IOUT, 1A/div

SWITCH TURN-ON TIME

CH1 = VOUT, 5V/div; CH2 = VON, 5V/div;

CH3 = VFAULT, 5V/div; CH4 = IOUT, 200mA/div

µs/div

-40

-20

100

FAULT-BLANKING TIMEOUT

vs. TEMPERATURE

TEMPERATURE (

°C)

VIN = 3V OR 5V

IOUT = 850mA

SWITCH TURN-OFF TIME

CH1 = VOUT, 5V/div; CH2 = VON, 5V/div;

CH3 = VFAULT, 5V/div; CH4 = IOUT, 200mA/div

µs/div

STARTUP TIME

(TYPICAL USB APPLICATION)

CH1 = VOUT, 5V/div; CH2 = VON, 5V/div;

CH3 = IOUT, 500mA/div; CH4 = VFAULT, 5V/div

1ms/div

CL = 150

µF

RL = 15

Ω

RESISTOR

LOAD

CURRENT

FULL CURRENT LIMIT CHARGES CAPACITOR

FOLDBACK

CURRENT LIMIT

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