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Product attributes Property Value
Manufacturer ETEK MICROELECTRONICS
Product Series
Packaging Tape & Reel (TR) |
Output Configuration Positive
Output Type Fixed
Number of Regulators 1
Voltage - Input (Max) 5.5V
Voltage - Output (Min/Fixed) 1.2V
Voltage - Output (Max) -
Voltage Dropout (Max) 0.7V @ 300mA
Current - Output 300mA
Current - Quiescent (Iq) 70 µA
Current - Supply (Max) -
PSRR 75dB ~ 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 SC-74A, SOT-753
Supplier Device Package SOT-23-5
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The ET51612B is a fixed 1.2V low dropout linear regulator from ETEK Microelectronics, capable of delivering 300mA of output current. With a dropout voltage of just 0.7V and excellent PSRR of 75dB at 1kHz, it provides clean, stable power for low-voltage digital and RF applications. The SOT-23-5 package ensures a compact solution for space-limited designs.

  • High PSRR: 75dB at 1kHz and 65dB at 10kHz effectively suppresses supply noise for sensitive circuits.
  • Low Dropout: 0.7V dropout at 300mA maximizes efficiency in low-headroom applications.
  • 300mA Output: Sufficient current for low-voltage digital cores and RF modules.
  • Compact SOT-23-5: Small package ideal for portable and embedded designs.

Low-Voltage Digital Cores

The 1.2V output is ideal for powering low-voltage digital cores in FPGAs, ASICs, and DSPs, providing up to 300mA with a dropout of only 0.7V to maintain efficiency.

DDR Memory Termination

For DDR2/DDR3 memory systems requiring a 1.2V reference, the ET51612B delivers clean, stable power with 75dB PSRR at 1kHz, reducing noise-induced data errors.

RF Transceivers

The excellent PSRR (75dB at 1kHz, 65dB at 10kHz) makes this regulator suitable for RF transceivers where supply noise can degrade signal integrity.

Portable Audio Equipment

With 300mA capability and low noise, the ET51612B powers audio codecs and amplifiers, ensuring high-fidelity output in portable media players.

Industrial Sensor Interfaces

The stable 1.2V rail supports precision analog sensors and interface ICs in industrial control systems, maintaining accuracy over temperature.

Q: What is the output voltage of the ET51612B?
A: The ET51612B provides a fixed 1.2V output.
Q: What is the maximum output current?
A: It can deliver up to 300mA of continuous output current.
Q: What is the input voltage range?
A: The input voltage range is not specified in the provided data; please refer to the official datasheet.
Q: What is the dropout voltage?
A: The dropout voltage is 0.7V at a 300mA load.
Q: What is the quiescent current?
A: The quiescent current is 70 µA.
Q: What package is available?
A: The ET51612B is available in a SOT-23-5 package.
Base Product Number : ET51612B
1.2V 300mA ETEK High PSRR LDO Linear Regulator SOT-23-5
Q: What is the output voltage of the ET51612B?
A: The ET51612B provides a fixed 1.2V output.
Q: What is the maximum output current?
A: It can deliver up to 300mA of continuous output current.
Q: What is the input voltage range?
A: The input voltage range is not specified in the provided data; please refer to the official datasheet.
Q: What is the dropout voltage?
A: The dropout voltage is 0.7V at a 300mA load.
Q: What is the quiescent current?
A: The quiescent current is 70 µA.
Q: What package is available?
A: The ET51612B is available in a SOT-23-5 package.