LM34902_15 Datasheet, PDF (1/11 Pages) Texas Instruments – 300mA Current Limited Power Switch

LM34902
www.ti.com
SNVS804B – MAY 2012 – REVISED APRIL 2013
300mA Current Limited Power Switch
Check for Samples: LM34902
FEATURES
1
•2 Input Voltage of 2.8V to 5.3V
• 0.3A Maximum Switch Current
• 0.64Ω Typical Total On-Resistance
• Load Detection
• Enable/Disable
• Switch On Indicator
• Peak Current Limit
• Thermal Shutdown
• 6-Bump Thin DSBGA Package
APPLICATIONS
• Handsets, Tablets, Notebooks
• Portable devices
DESCRIPTION
The LM34902 is a 0.3A PFET switch used to control
the input voltage of electronic devices. It is easily
integrated into system designs that have a 2.8V to
5.3V voltage rail. Besides the 0.45Ω PFET switch, the
LM34902 can be enabled or disabled by a logic
signal. The IC monitors the presence of a
downstream electronic device via a dedicated pin to
decide whether to turn on the PFET switch. A power
good signal generated by the IC can be used by
system control to determine the status of the switch.
The LM34902 also provides over-current and over-
temperature protection. The IC comes in a tiny 6-
bump Thin DSBGA package.
Typical Application Circuit
VCC Main: 2.8V to 5.3V
1.8V
220k
VCC
A1
ACC_PWR
A2
GND
ENABLE
PC
B1 B2
POK
C1
ACC_DET
C2
220k
VIN
Accessory
Device
1M
Accessory
Detection
1
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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