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 67mΩ 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 250Ω 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.

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
• 67mΩ 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