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Product attributes Property Value
Manufacturer Fairchild Semiconductor
Product Series
Packaging Bulk |
Output Configuration Positive
Output Type Fixed
Number of Regulators 1
Voltage - Input (Max) 9V
Voltage - Output (Min/Fixed) 2.8V
Voltage - Output (Max) -
Voltage Dropout (Max) 1.3V @ 1A
Current - Output 1A
Current - Quiescent (Iq) 3 mA
Current - Supply (Max) -
PSRR 70dB ~ 65dB (120Hz ~ 1kHz)
Control Features Enable
Protection Features Over Current, Over Temperature
Operating Temperature -40°C ~ 125°C
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case 6-VDFN Exposed Pad
Supplier Device Package 6-DFN (3x3)
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The NCP5661MN28T2G is a fixed-output low dropout regulator providing 2.8V at up to 1A. It features excellent PSRR of 70dB at 120Hz, making it ideal for noise-sensitive analog and digital circuits. The 1.3V dropout at full load allows operation with moderate input margins. Packaged in a compact 6-DFN (3x3), it suits high-density PCB designs.

  • High PSRR: 70dB at 120Hz rejects power line noise for clean output.
  • 1A output current: Supports demanding digital loads like FPGAs and DSPs.
  • Compact DFN package: 3x3mm footprint for space-constrained designs.
  • Low quiescent current: 3 mA balances efficiency and performance.

FPGA Core Power

Provides a stable 2.8V rail for FPGA core logic with 1A capacity and high PSRR for reliable operation.

DSP Processors

Powers digital signal processors requiring 2.8V with low noise for audio/video processing.

High-Speed ADCs

Delivers clean 2.8V supply to analog-to-digital converters, with 70dB PSRR at 120Hz rejecting mains hum.

Optical Transceivers

Regulates 2.8V for laser drivers and TIA circuits in fiber-optic communication modules.

Medical Devices

Provides reliable 2.8V power for portable medical monitors and diagnostic equipment.

Server Motherboards

Powers memory controllers and I/O interfaces requiring 2.8V with high current capability.

Q: What is the output voltage of the NCP5661MN28T2G?
A: The fixed output voltage is 2.8V.
Q: What is the maximum output current?
A: It can deliver up to 1A of output current.
Q: What is the input voltage range?
A: The input voltage range is not specified in the provided data; refer to the datasheet.
Q: What is the dropout voltage?
A: The dropout voltage is 1.3V at 1A load.
Q: What is the quiescent current?
A: The quiescent current is 3 mA.
Q: What is the PSRR performance?
A: PSRR is 70dB at 120Hz and 65dB at 1kHz.
Base Product Number : NCP5661MN28T2G
1A 2.8V 6-DFN High PSRR LDO Linear Regulator Low Dropout
Q: What is the output voltage of the NCP5661MN28T2G?
A: The fixed output voltage is 2.8V.
Q: What is the maximum output current?
A: It can deliver up to 1A of output current.
Q: What is the input voltage range?
A: The input voltage range is not specified in the provided data; refer to the datasheet.
Q: What is the dropout voltage?
A: The dropout voltage is 1.3V at 1A load.
Q: What is the quiescent current?
A: The quiescent current is 3 mA.
Q: What is the PSRR performance?
A: PSRR is 70dB at 120Hz and 65dB at 1kHz.