MIC94090/1/2/3/4/5

High Side Load Switches for

Consumer Applications

MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (

March 2009

M9999-033109-A

General Description

The MIC94090/1/2/3/4/5 is a family of high-side load switches

designed for operation from 1.7V to 5.5V input voltage. The

load switch pass element is an internal 130m

Ω R

channel MOSFET which enables the device to support up to

1.2A continuous current. Additionally, the load switch

supports 1.5V logic level control and shutdown features.

The MIC94090 and MIC94091 feature rapid turn on. The

MIC94092 and MIC94093 provide a slew rate controlled soft-

start turn-on of 790µs, while the MIC94094 and MIC94095

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

soft-start feature option prevents an in-rush current event

from pulling down the input supply voltage.

The MIC94091, MIC94093, and MIC94095 include a 250

Ω

auto discharge load circuit that is switched on when the load

switch is disabled.

An active pull-down on the enable input keeps the

MIC94090/1/2/3/4/5 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 MIC94090/1/2/3/4/5 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.

Features

• 1.7V to 5.5V input voltage range

• 1.2A continuous operating current

• 130mΩ R

DS(ON)

• Internal level shift for CMOS/TTL control logic

• Ultra low quiescent current

• Micro-power shutdown current

• Rapid turn-on: MIC94090/1

• Soft-Start: MIC94092/3 (790µs), MIC94094/5 (120µs)

• Load discharge circuit: MIC94091/3/5

• Space saving and thermally capable 1.2mm x 1.2mm

Thin MLF

• Industry standard SC-70-6 package

Applications

• Cellular phones

• Portable Navigation Devices (PND)

• GPS modules

• Personal Media Players (PMP)

• Ultra Mobile PCs

• Other Portable applications

• PDAs

• Portable instrumentation

• Industrial and DataComm equipment

_________________________________________________________________________________________________________

Typical Application

MIC94090 (ultra fast turn on)

MIC94092 (790µs soft-start)

MIC94094 (120µs soft-start)

MIC94091 (ultra fast turn on with auto-discharge)

MIC94093 (790µs soft-start with auto-discharge)

MIC94095 (120µs soft-start with auto-discharge)