MIC94044 Datasheet, PDF (1/9 Pages) Micrel Semiconductor – 28mΩ RDSON 3A High Side Load Switch in 1.2mm x 1.2mm MLF® Package

MIC94044/5
28mΩ R_DSON 3A High Side Load Switch
in 1.2mm x 1.2mm MLF^® Package
General Description
The MIC94044 and MIC94045 are high-side load switches
designed to operate from 1.7V to 5.5V input voltage. The
load switch pass element is an internal 28mΩ R_DSON
P-channel MOSFET 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 1.2mm x 1.2mm 4 pin MLF^® package.
The MIC94044/5 provides a slew rate controlled soft-start
turn-on of 1ms (typical) to prevent an in-rush current event
from pulling down the input supply voltage.
The MIC94045 features an active load discharge circuit
which switches in a 200Ω load when the switch is disabled
to automatically discharge a capacitive load.
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 MIC94044/5 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.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
• 28mΩ R_DSON
• 3A continuous operating current
• 1.2mm x 1.2mm space saving 4-pin MLF^® package
• 1.7V to 5.5V input voltage range
• Internal level shift for CMOS/TTL control logic
• Ultra low quiescent current
• Micro-power shutdown current
• Soft-Start: 1ms
• Load discharge circuit: MIC94045
• Ultra fast turn off time
• Junction operating temperature from -40ºC to +125ºC
Applications
• Solid State Drives (SSD)
• Cellular phones
• Portable Navigation Devices (PND)
• Personal Media Players (PMP)
• Ultra Mobile PCs
• Portable instrumentation
• Other Portable applications
• PDAs
• Industrial and DataComm equipment
____________________________________________________________________________________________________________
Typical Application
MIC94044 (1ms soft-start)
MIC94045 (1ms soft-start with auto-discharge)
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
March 2011
M9999-032311-A