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ET542XXY1B
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General Description
The ET542XXY1B Series are low voltage 400mA voltage regulator. The input voltage is as low as Min. 1.2V 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.
Specification
Sample
Features
- Wide Input Voltage Range from 1.2V to 5.0V
- Very Low IQ is 55µA Typ
- Max Output Current up to 400mA
- Fixed Output Voltage: 0.85V, 1.0V, 1.1V, 1.2V
- Other Output Voltage Options Available on Request: 0.7V to 3.8V
- Output Voltage Accuracy is ±2%
- Dropout Voltage is Typ 500mV@400mA (VOUT=1.0V)
- 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
- Package：DFN4(1×1)
Technical Documentation
| Type | Title | Format | Date |
|---|---|---|---|
| Datasheet | ET542XXY1B | 2026-08-24 |
