Micrel Inc. MIC5255-2.9BD5

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Product attributes Property Value
Manufacturer Micrel Inc.
Product Series
Packaging Bulk |
Output Configuration Positive
Output Type Fixed
Number of Regulators 1
Voltage - Input (Max) 6V
Voltage - Output (Min/Fixed) 2.9V
Voltage - Output (Max) -
Voltage Dropout (Max) 0.25V @ 150mA
Current - Output 150mA
Current - Quiescent (Iq) 150 µA
Current - Supply (Max) -
PSRR 60dB ~ 50dB (10Hz ~ 10kHz)
Control Features Enable
Protection Features Over Current, Over Temperature, Under Voltage Lockout (UVLO)
Operating Temperature -40°C ~ 125°C
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case SOT-23-5 Thin, TSOT-23-5
Supplier Device Package TSOT-23-5

The MIC5255-2.9BD5 from Micrel Inc. is a fixed 2.9V low-dropout linear regulator capable of 150mA output. Featuring an ultra-low dropout of 0.25V at full load and quiescent current of 150µA, it is designed for battery-powered portable electronics. The TSOT-23-5 package is compact and thermally efficient. With PSRR of 60dB at 10Hz to 50dB at 10kHz, it provides excellent noise rejection for sensitive analog and RF circuits.

  • Ultra-Low Dropout: 0.25V at 150mA maximizes efficiency in low-headroom battery designs.
  • Excellent Noise Rejection: 60-50dB PSRR across 10Hz-10kHz ensures clean power for audio/RF.
  • Stable 2.9V Rail: Ideal for modern low-voltage ICs requiring precise 2.9V supply.
  • Compact TSOT-23-5: Small footprint with good thermal dissipation for 150mA loads.

Portable GPS Receivers

The 2.9V output and low dropout maintain stable power for GPS modules as batteries discharge.

Bluetooth Modules

Provides clean 2.9V rail for BLE SoCs, with 60dB PSRR reducing RF interference.

Digital Cameras

Powers image sensors and DSP cores requiring 2.9V, ensuring consistent performance.

Wearable Fitness Trackers

Low dropout and 150mA capacity suit always-on accelerometers and heart-rate sensors.

Smart Home Sensors

Regulates 2.9V for Zigbee and Z-Wave transceivers in battery-powered door/window sensors.

Portable Audio Players

Delivers low-noise 2.9V to audio codecs, enhancing signal clarity with 60dB PSRR.

Q: What is the output voltage?
A: The MIC5255-2.9BD5 provides a fixed 2.9V output.
Q: What is the maximum output current?
A: It can deliver up to 150mA of continuous current.
Q: What is the input voltage range?
A: The input voltage range is 2.9V, typically 3.3V to 6V input.
Q: What is the dropout voltage?
A: Dropout is a low 0.25V at 150mA load.
Q: What is the quiescent current?
A: Quiescent current is 150µA.
Q: What package is available?
A: It comes in a TSOT-23-5 package.
Base Product Number : MIC5255-2.9BD5
150mA 2.9V High PSRR LDO Linear Regulator Low Dropout Micrel TSOT-23-5
Q: What is the output voltage?
A: The MIC5255-2.9BD5 provides a fixed 2.9V output.
Q: What is the maximum output current?
A: It can deliver up to 150mA of continuous current.
Q: What is the input voltage range?
A: The input voltage range is 2.9V, typically 3.3V to 6V input.
Q: What is the dropout voltage?
A: Dropout is a low 0.25V at 150mA load.
Q: What is the quiescent current?
A: Quiescent current is 150µA.
Q: What package is available?
A: It comes in a TSOT-23-5 package.