MIC94161/2/3/4/5

3A High-Side Load Switch

with Reverse Blocking

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

March 14, 2014

Revision 1.1

General Description

The MIC94161/2/3/4/5 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

14.5mΩ R

which enables the

device to support up to 3A of continuous current.

Additionally, the load switch supports 1.5V logic level

control and shutdown features in a tiny 1.5mm × 1mm

6-ball WLCSP package.

The MIC9416x provides reverse current protection when

the device is disabled. The device will not allow the flow of

current from the output to the input when the device is

turned

OFF.

Additionally,

the

MIC94161

features

overvoltage protection to protect the load when the input

voltage is above 4.55V, as well as a precise enable

threshold which keeps the MIC94161 in the default OFF

state until the EN pin rises above 1.15V.

The MIC94161/2/3/4/5 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 are available on

Micrel’s web site at: www.micrel.com.

Features

• 1.5mm × 1mm 6-ball WLCSP package

•

14.5mΩ R

DSON

• 1.7V to 5.5V input voltage range

• 3A continuous operating current

• Reverse current flow blocking (no “body diode”)

• Internal level shift for CMOS/TTL control logic

• Ultra-low quiescent current

• Micropower shutdown current

• Soft-start: MIC94161/4/5 (2.7ms)

• Load discharge circuit: MIC94162/4

• Ultra-fast turn-off time

• Junction operating temperature from −40°C to +125°C

Applications

• Solid state drives (SSD)

• Smart phones and tablets

• Personal media players (PMP)

• Ultra mobile PCs

• Portable instrumentation

• GPS modules

• Datacom equipment

Typical Application

MIC94161 (2.7ms Soft Start with OVP)

MIC94163 (Ultra-Fast Turn On)

MIC94165 (2.7ms Soft Start)

MIC94162 (Ultra-Fast Turn On with Auto Discharge)

MIC94164 (2.7ms Soft Start with Auto Discharge)