Dual, Current-Limited, High-Side P-Channel

Switches with Thermal Shutdown

6

_______________________________________________________________________________________

NAME

FUNCTION

1

OUT A

Switch A Output. P-channel MOSFET drain. Bypass OUT A with a 0.1

µF capacitor to ground.

2

OUT B

Switch B Output. P-channel MOSFET drain. Bypass OUT B with a 0.1

µF capacitor to ground.

PIN

3

SET A

Set Current-Limit Input. A resistor from SET A to ground sets the current limit for switch A. See Setting the

Current Limit section.

4

ONA

Active-Low Switch A On Input. A logic low turns switch A on.

8

ONB

Active-Low Switch B On Input. A logic low turns switch B on.

7

IN

Input, Switches A and B. P-channel MOSFET source. Bypass IN with a 1

µF capacitor to ground.

6

SET B

Set Current-Limit Input. A resistor from SET B to ground sets the current limit for switch B. See Setting the

Current Limit section.

5

GND

Ground

______________________________________________________________Pin Description

1.24V

ON

P

P

P

P

P

CURRENT-LIMIT

AMPLIFIER B

REPLICA

AMPLIFIER A

CONTROL

CIRCUITRY

ON

REPLICA

AMPLIFIER B

1.24V

ON

ON

P

CURRENT-LIMIT

AMPLIFIER A

OUT B

OUT A

SET B

SET A

GND

IN

ONB

ONA

MAX894L

MAX895L

Figure 1. Functional Diagram