General Description

The EC49220 series of adjustable output ultra low dropout linear regulators are designed for portable battery powered applications, which require low power consumption and low dropout voltage.
Each device contains a band gap voltage reference, an error amplifier, a PMOS power transistor, and current limit and temperature limit protection circuits.
The output voltage can be adjusted via the external resistor network, based on the internal reference voltage of 0.8V The EC49220 is designed to work with low cost electrolytic and ceramic capacitors and requires a minimum output capacitor of 1µF.

FEATURE

■ Typical 150mV Dropout Voltage at 500mA.
■ Fast Enable Turn-On Time of 20µs (Typ.)
■ Excellent Line and Load Regulation.
■ High Accuracy Output Voltage of 2%.
■ Ultra-Low Ground Current at 78µA (Typ.)
■ Disable Current Less than 1µA (Typ.)
■ Thermal and Over-Current Protection.
■ Short Circuit Protection
■ Standard SOT23-5 Package.

APPLICATION

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