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Product attributes Property Value
Manufacturer ETEK MICROELECTRONICS
Product Series ET536XXYB
Packaging Tape & Reel (TR) |
Output Configuration Positive
Output Type Fixed
Number of Regulators 1
Voltage - Input (Max) 5.5V
Voltage - Output (Min/Fixed) 1.8V
Voltage - Output (Max) -
Voltage Dropout (Max) 0.3V @ 300mA
Current - Output 300mA
Current - Quiescent (Iq) 70 µA
Current - Supply (Max) -
PSRR 78dB ~ 65dB (1kHz ~ 10kHz)
Control Features Enable
Protection Features Over Current, Over Temperature
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case 4-XDFN Exposed Pad
Supplier Device Package 4-DFN (1x1)
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The ET53618YB from ETEK MICROELECTRONICS is a high-performance LDO regulator providing a fixed 1.8V output. Capable of sourcing 300mA, it features an ultra-low 0.3V dropout voltage, enabling efficient operation from higher voltage rails. With a quiescent current of just 70 µA and excellent PSRR of 78dB at 1kHz, it delivers clean, stable power for digital cores and sensitive analog circuits. The compact 4-DFN (1x1mm) package is ideal for space-constrained applications.

  • Ultra-Low Dropout: 0.3V dropout at 300mA maximizes efficiency and allows operation from lower input voltages.
  • Excellent Noise Rejection: 78dB PSRR at 1kHz ensures clean power for mixed-signal and RF applications.
  • Low Power Consumption: 70 µA quiescent current helps extend battery life in portable devices.
  • Compact Size: 1x1mm DFN package enables high-density PCB designs.

FPGA and DSP Core Supplies

The low 0.3V dropout at 300mA allows efficient conversion from 2.5V or 3.3V rails to 1.8V cores, minimizing power loss in high-performance digital systems.

High-Speed Digital Interfaces

Provides clean 1.8V power for DDR memory termination, SD card interfaces, and high-speed transceivers requiring stable, low-noise voltage.

Optical Modules

Ideal for SFP/QSFP transceivers where 1.8V is needed for laser drivers and TIA circuits, with high PSRR preventing data corruption.

Battery-Powered Handheld Devices

The 70 µA quiescent current and low dropout make it suitable for smartphones, tablets, and portable gaming consoles.

Industrial Control Systems

Delivers reliable 1.8V power for PLCs, motor controllers, and industrial sensors operating in noisy environments.

Networking Equipment

Ensures stable power for Ethernet PHYs, switches, and routers, maintaining signal integrity in high-speed data paths.

Q: What is the output voltage of the ET53618YB?
A: The fixed output voltage is 1.8V.
Q: What is the maximum output current?
A: It can deliver up to 300mA.
Q: What is the input voltage range?
A: The input voltage range is not specified in the provided data; please refer to the datasheet.
Q: What is the dropout voltage?
A: The dropout voltage is a low 0.3V at 300mA.
Q: What is the quiescent current?
A: The quiescent current is 70 µA.
Q: What is the PSRR performance?
A: PSRR is 78dB at 1kHz and 65dB at 10kHz.
Base Product Number : ET53618
1.8V 300mA 4-DFN Digital Core ETEK High PSRR LDO Linear Regulator Low Dropout
Q: What is the output voltage of the ET53618YB?
A: The fixed output voltage is 1.8V.
Q: What is the maximum output current?
A: It can deliver up to 300mA.
Q: What is the input voltage range?
A: The input voltage range is not specified in the provided data; please refer to the datasheet.
Q: What is the dropout voltage?
A: The dropout voltage is a low 0.3V at 300mA.
Q: What is the quiescent current?
A: The quiescent current is 70 µA.
Q: What is the PSRR performance?
A: PSRR is 78dB at 1kHz and 65dB at 10kHz.