General Description

The MAX890L smart, low-voltage, P-channel, MOSFET

power switch is intended for high-side load-switching

applications. This switch operates with inputs from

+2.7V to +5.5V, making it ideal for both +3V and +5V

systems. Internal current-limiting circuitry protects the

input supply against overload. Thermal-overload pro-

tection limits power dissipation and junction tempera-

tures.

The MAX890L’s maximum current limit is 1.2A. The cur-

rent limit through the switch is programmed with a

resistor from SET to ground. The quiescent supply cur-

rent is a low 10µA. When the switch is off, the supply

current decreases to 0.1µA.

The MAX890L is available in an 8-pin SO package.

Applications

PCMCIA Slots

Access Bus Slots

Portable Equipment

Features

♦♦ +2.7V to +5.5V Input Range

♦♦ Programmable Current Limit

♦♦ Low Quiescent Current

0.1µA (typ) with Switch Off

♦♦ Thermal Shutdown

♦♦ FAULT Indicator Output

♦♦ 0.09Ω (typ) On-Resistance

1.2A, Current-Limited, High-Side

P-Channel Switch with Thermal Shutdown

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Maxim Integrated Products

1

1

+

2

8

7

FAULT

OUT

OUT

SET

IN

IN

ON

GND

MAX890L

SO

TOP VIEW

3

4

6

5

Pin Configuration

MAX890L

1

μF

0.1

μF

100k

Ω

IN

OUTPUT

OUT

INPUT

IN

OUT

FAULT

ON

ON/OFF

GND

SET

Typical Operating Circuit

19-1146; Rev 4; 4/11

Ordering Information

*

To order this unit in tape and reel, add (T) to the end of the

part number.

**

+

Denotes a lead(Pb)-free/RoHS-compliant package.

/V denotes an automotive qualified part.

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

PART

TEMP RANGE

PIN-

PACKAGE

CURRENT

LIMIT

MAX890LC/D

0°C to +70°C

Dice**

1.2A

MAX890LESA+

-40°C to +85°C 8 SO

1.2A

MAX890LESA/V+

-40°C to +85°C 8 SO

1.2A