General Description

        The ET553ADJ are CMOS-based low-dropout, low-power linear regulators, offering 500-mA with low dropout voltage, high ripple rejection, high output accuracy and low supply current. The ET553ADJ consist of an accurate voltage-reference block, an error amplifier, a voltage-setting resistor net, a PMOSFET pass device, a thermal-shutdown circuit, and a current limit circuit with short protection.

        The ET553ADJ use a type of outstanding CMOS process to minimize the supply current. A low on-resistance PMOS pass device is equipped for lower dropout voltage. ET553ADJ also possess the EN function to save more energy and extend the battery life.

Features

●  Wide Input Voltage Range: 1.9V to 5.5V

●  Output Current: 500mA optional

●  Output Voltage Range: 1.0V to 3.6V (externally set)

●  Very Low IQ: 50µA

●  Excellent Load / Line Transient Response

●  Built-in Over Current Protection and Thermal Shutdown circuit（V_OUT=1.05V）

●  Built-in Inrush Current Suppression circuit and Current Limit

●  Built-in Auto-discharging circuit (optional)

●  Package: DFN4 (1.2mm × 1.2mm), SOT23-5, SOT89-5

Application Circuits