200mA/250mA/300mA Current-Limit Switches

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5

Pin Description

SWITCH TURN-ON TIME RESPONSE

MAX4789 toc14

100

µs/div

1V/div

10mA/div

CURRENT-LIMIT RESPONSE

(OUT SHORTED TO GND)

MAX4789 toc13

40

µs/div

2V/div

2V/div

5A/div

µF

µF

Typical Operating Characteristics (continued)

PIN

TDFN

MAX4789

MAX4791

MAX4793

TDFN

MAX4790

MAX4792

MAX4794

5-SOT23

MAX4789

MAX4791

MAX4793

4-SOT143

MAX4789–

MAX4794

NAME

FUNCTION

1—

4

—

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.

2

2

2

2

GND

Ground

3

3

3

3

ON

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

4

1, 4

—

—

N.C.

No Connection. Not internally connected.

5

5

1

4

IN

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

6

6

5

1

OUT

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

FLAG-BLANKING RESPONSE

MAX4789 toc16

4ms/div

FLAG

2V/div

100mA/div

2V/div

2V/div

SWITCH TURN-OFF TIME RESPONSE

MAX4789 toc15

200ns/div

2V/div

10mA/div