The SE5509 series of fixed output low dropout
linear regulators are designed for portable battery
powered
applications，which require low power
consumption，low noise environment, and low
dropout voltage. Each device contains a bandgap
voltage reference， an error amplifier, a PMOS
power transistor, and resistors for setting output
voltage，and current limit and temperature limit
protection circuits.
The SE5509 has been designed to be used
with low cost capacitors and requires a minimum
output capacitor of 1.0μF. The output voltages
range from 1.3V to 4.4V in 100mV increments.
Standard voltage versions are 3.0,
and 3.3V.

Typical 200mV Dropout Voltage at 150mA.
Fast Enable Tum-On Time of 20μs (Typ.)
Excellent Line and Load Regulation.
High Accuracy Output Voltage of 2%.
Ultra-Low Ground Current at 20μA (Typ.)
Disable Current Less than 0.1μA(Typ.)
Over Current and thermal Protection.
No Reverse Current.
Standard SOT-23-5L and TSOP-5 Package.

             应用

USB removable devices
MPEG4 devices
Wireless LAN's
Hand-Held Instrumentation.
Portable DVD players
Digital camera