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车规 ET542XXY1B
General Description
The ET542XXY1B Series are low voltage 400mA 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 ±2% and due to a built-in transistor with low on-resistance. It consists of a voltage reference unit, an error amplifier, a resistor-net for voltage setting, and a current limit circuits for over-current prevention.
The ET542XXY1B uses a type of outstanding CMOS process to minimize the supply current. A low on-resistance PMOS pass device is equipped for lower dropout voltage. ET542XXY1B 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 from 1.1V to 5.0V
Very Low IQ is 55µA Typ
Max Output Current up to 400mA
Output Voltage Range from 0.7V to 3.8V
Output Voltage Accuracy is ±2%
Dropout Voltage is Typ 280mV@400mA (VOUT=1.5V)
Excellent Load/Line Transient Response
Line Regulation is 0.1%/V Typ
Built-in Fold Back Protection Circuit
Built-in Constant Slope Circuit
Built-in Auto-discharging Circuit
MSL is Level1
Small DFN4(1×1) Package
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
