200mA/500mA Selectable

Current-Limit Switches

_______________________________________________________________________________________

5

Pin Description

Typical Operating Characteristics (continued)

PIN

SOT23

TDFN

NAME

FUNCTION

1

1

IN

Input. Bypass with a 0.1µF ceramic capacitor to ground.

2

5

GND

Ground

3

6

ON

Active-High Switch-On Input. A logic high turns the switch on.

44

FLAG

Fault Output. This open-drain output goes low when the device stays in forward or reverse current limit

for more than the blanking time period.

FLAG is high impedance when a fault is not present or when

ON is low.

5

3

SEL

Current-Limit Threshold Selection. Connect to logic-low level or leave floating to select 200mA current-

limit threshold. Connect to logic-high level to select 500mA current-limit threshold.

6

2

OUT

Switch Output. Bypass with a 0.1µF ceramic capacitor to ground.

0V

0V

3V

3V

0V

200

µs/div

2V/div

2V/div

1A/div

REVERSE CURRENT LIMIT

MAX4772/3 toc16

µF

µF

0V

0V

3.3V

20

µs/div

1V/div

10mA/div

SWITCH TURN-ON TIME RESPONSE

MAX4772/3 toc17

0V

0V

3.3V

40ns/div

1V/div

10mA/div

SWITCH TURN-OFF TIME RESPONSE

MAX4772/3 toc18

0V

0V

0V

0V

3.3V

3.3V

3.3V

10ms/div

2V/div

2V/div

2V/div

500mA/div

FLAG-BLANKING RESPONSE

(OVERLOAD CONDITION)

MAX4772/3 toc19

µF

µF