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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) 5.5V
Voltage - Output (Min/Fixed) 1.8V
Voltage - Output (Max) -
Voltage Dropout (Max) -
Current - Output 180mA
Current - Quiescent (Iq) 150 µA
Current - Supply (Max) -
PSRR 50dB (100kHz)
Control Features Enable, Power Good
Protection Features Over Current, Over Temperature
Operating Temperature -40°C ~ 85°C
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case 6-VDFN Exposed Pad
Supplier Device Package 6-DFN (2x2)
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The FAN2558MP18X from Fairchild Semiconductor is a fixed 1.8V low dropout linear regulator delivering up to 180mA. Its ultra-low 150 µA quiescent current and 50dB PSRR at 100kHz make it ideal for battery-powered and noise-sensitive applications. Housed in a compact 6-DFN (2x2) package, it offers a space-saving solution for portable electronics.

  • Extended Battery Life: 150 µA quiescent current minimizes standby drain in portable devices.
  • High-Frequency Noise Rejection: 50dB PSRR at 100kHz ensures clean power for RF and analog circuits.
  • Compact Footprint: 6-DFN (2x2) package saves PCB space for miniaturized designs.
  • Stable Fixed Output: 1.8V rail ideal for low-voltage digital cores and I/O.

Portable Battery-Powered Devices

The low 150 µA quiescent current extends battery life in wearables, IoT sensors, and handheld instruments where standby power is critical.

Noise-Sensitive Analog Circuits

With 50dB PSRR at 100kHz, this LDO effectively filters high-frequency switching noise, making it suitable for powering precision ADC/DAC references and RF stages.

Compact PCB Designs

The 6-DFN (2x2) package minimizes board footprint, enabling dense layouts in space-constrained products like earbuds and smart cards.

Microcontroller Core Supply

The 1.8V fixed output matches modern MCU I/O and core voltages, providing a clean, stable rail for digital logic.

Low-Power Wireless Modules

Stable 1.8V output with low dropout supports BLE and Zigbee modules, ensuring reliable operation near battery end-of-life.

Q: What is the output voltage of the FAN2558MP18X?
A: The fixed output voltage is 1.8V.
Q: What is the maximum output current?
A: It can deliver up to 180mA.
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: Dropout voltage is not specified in the provided data; refer to the datasheet.
Q: What is the quiescent current?
A: The quiescent current is 150 µA.
Q: What package is available?
A: It comes in a 6-DFN (2x2) package.
Base Product Number : FAN2558
1.8V 180mA 6-DFN Fairchild High PSRR LDO Linear Regulator Low Quiescent Current
Q: What is the output voltage of the FAN2558MP18X?
A: The fixed output voltage is 1.8V.
Q: What is the maximum output current?
A: It can deliver up to 180mA.
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: Dropout voltage is not specified in the provided data; refer to the datasheet.
Q: What is the quiescent current?
A: The quiescent current is 150 µA.
Q: What package is available?
A: It comes in a 6-DFN (2x2) package.