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车规 ET540XXY1B
General Description
The ET540XX Series are low voltage 500mA voltage regulator. The input voltage is as low as Min. 1.1V and the output voltage can be set from 0.7V. The output voltage accuracy has been improved to ±0.8% and due to a built-in transistor with low on-resistance. Each of these ICs consists of a voltage reference unit, an error amplifier, a resistor-net for voltage setting, and a current limit circuits for over-current for the destruction prevention by the over-current.
The ET540XX 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. ET540XX also possess the EN function to save more energy and extend the battery life. The EN pin can switch the regulator to standby mode.
Features
Wide Input Voltage Range: 1.1V to 5V
Very Low IQ: 50µA typ
Max Output Current: 500mA
Output Voltage Range: 0.7V to 3.8V
Dropout Voltage 525mV Typical (500mA) @0.8V Output
Excellent Load/Line Transient Response
Line Regulation: 0.1%/V (typical)
Built-in Fold Back Protection Circuit
Built-in Constant Slope Circuit
Built-in Auto-discharging Circuit
MSL: Level1(DFN6,DFN4), Level3(SOT23-5)
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
