General Description

The MIC94080/1/2/3/4/5 is a family of high-side load switches

designed to operate from 1.7V to 5.5V input voltage. The load

switch pass element is an internal 67m? RDSON P-Channel

MOSFET which enables the device to support up to 2A of

continuous current. Additionally, the load switch supports 1.5V

logic level control and shutdown features in a tiny 0.85mm x

0.85mm 4-pin Thin MLF?

package.

The MIC94080 and MIC94081 feature rapid turn on. The

MIC94082 and MIC94083 provide a slew rate controlled softstart turn-on of 800μs, while the MIC94084 and MIC94085

provide a slew rate controlled soft-start turn-on of 120μs. The

soft-start feature is provided to prevent an in-rush current

event from pulling down the input supply voltage.

The MIC94081, MIC94083, and MIC94085 feature an active

load discharge circuit which switches in a 250? load when the

switch is disabled to automatically discharge a capacitive load.

An active pull-down on the enable input keeps the

MIC94080/1/2/3/4/5 in a default OFF state until the enable pin

is pulled above 1.25V. Internal level shift circuitry allows low

voltage logic signals to switch higher supply voltages. The

enable voltage can be as high as 5.5V and is not limited by

the input voltage.

The MIC94080/1/2/3/4/5 operating voltage range makes them

ideal for Lithium ion and NiMH/NiCad/Alkaline battery

powered systems, as well as non-battery powered

applications. The devices provide low quiescent current and

low shutdown current to maximize battery life.

Datasheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

特性 Features

? 0.85mm x 0.85mm space saving 4-pin Thin MLF?

package

? 1.7V to 5.5V input voltage range

? 2A continuous operating current

? 67m? RDSON

? Internal level shift for CMOS/TTL control logic

? Ultra low quiescent current

? Micro-power shutdown current

? Soft-Start: MIC94082/3 (800μs), MIC94084/5 (120μs)

? Load discharge circuit: MIC94081, MIC94083,

MIC94085

? Ultra fast turn off time

? Junction operating temperature from -40oC to +125oC

Applications

? Cellular phones

? Portable Navigation Devices (PND)

? Personal Media Players (PMP)

? Ultra Mobile PCs

? Portable instrumentation

? Other Portable applications

? PDAs

? GPS Modules

? Industrial and DataComm equipment