The LM34904 is a 0.5A 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 0.4Ω PFET switch, the LM34904 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 LM34904 also provides over-current and over-temperature protection. The
IC comes in a tiny 6-bump thin DSBGA package.
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