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车规 ET553XX
General Description
The ET553XX series are CMOS-based low-dropout, low-power linear regulators, offering 500mA with low dropout voltage, high ripple rejection, high output accuracy and low supply current. The ET553XX series 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 ET553XX series 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. ET553XX 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 (Fixed or externally set)
Very Low IQ: 50µA
Excellent Load / Line Transient Response
Built-in Over Current Protection and Thermal Shutdown circuit
Built-in Inrush Current Suppression circuit and Current Limit
Built-in Auto-discharging circuit
Package: DFN4 (1×1), DFN4 (1.2×1.2), SOT23-5，SOT89-5
Applications
Constant-Voltage Power Supply for Battery-Powered Device
Constant-Voltage Power Supply for TV, Notebook PC and Home Electric Appliance
Constant-Voltage Power Supply for Portable Equipment
Pin Configuration
Block Diagram
Application Circuits
