MAX890, MAX890L 1.2A, Current-Limited, High-Side P-Channel Switch with Thermal Shutdown

Low-Resistance P-Channel Switches with Adjustable, Accurate Current Limit Protects Systems and USB

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 protection limits power dissipation and junction temperatures.

The MAX890L's maximum current limit is 1.2A. The current limit through the switch is programmed with a resistor from SET to ground. The quiescent supply current 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.

Key Features

+2.7V to +5.5V Input Range

Programmable Current Limit

Low Quiescent Current

10µA (typ) at V_IN = 3.3V
0.1µA (typ) with Switch Off

Thermal Shutdown

Active-Low FAULT Indicator Output

0.09�� (typ) On-Resistance

Applications

Access Bus Slots

PCMCIA Slots

Portable Equipment

Diagram

MAX890, MAX890L: Typical Operating Circuit
Typical Operating Circuit

Key Specifications: USB Power Switches

Part Number

Switches

I_LOAD
(A)

R_ON
(��)

Fault Indicator

V_IN
(V)

Package/Pins

Smallest Available Pckg.
(mm²)

Oper. Temp.
(��C)

max

typ

max w/pins

MAX890L

0.075

Yes

2.7 to 5.5

SOIC(N)/8

30.9

-40 to +85

See All USB Power Switches (28)

source��ShenZhen henlito electronic co.,ltd.

web:www.henlito.com