Micrel Inc. MIC5219-3.1BM5

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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) 12V
Voltage - Output (Min/Fixed) 3.1V
Voltage - Output (Max) -
Voltage Dropout (Max) 0.6V @ 500mA
Current - Output 500mA
Current - Quiescent (Iq) 8 µA
Current - Supply (Max) -
PSRR 75dB (120Hz)
Control Features Enable
Protection Features Over Current, Over Temperature, Reverse Polarity
Operating Temperature -40°C ~ 125°C
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case SC-74A, SOT-753
Supplier Device Package SOT-23-5

The MIC5219-3.1BM5 is a low dropout linear regulator offering a fixed 3.1V output and up to 500mA current. Its ultra-low 8µA quiescent current makes it exceptional for battery-powered applications. With 75dB PSRR and a compact SOT-23-5 package, this LDO delivers clean, efficient power for portable and noise-sensitive electronics.

  • Ultra-Low Power: 8µA quiescent current extends battery life in standby mode.
  • High Current Capacity: 500mA output supports a wide range of loads.
  • Low Dropout: 0.6V dropout at full load improves efficiency.
  • Compact Footprint: SOT-23-5 package ideal for space-limited designs.

Battery-Powered IoT Modules

The 8µA quiescent current dramatically reduces idle power consumption, making it perfect for always-on connected sensors and smart home devices.

Portable Audio Equipment

75dB PSRR at 120Hz ensures clean power for headphone amplifiers and DACs, minimizing hum and noise.

Handheld Medical Devices

Reliable 500mA output supports glucose monitors, pulse oximeters, and other low-power medical instruments requiring stable voltage.

Wireless Communication

Stable 3.1V rail for RF transceivers and Bluetooth modules, maintaining performance during transmission bursts.

Automotive Interior Electronics

Compact SOT-23-5 package fits in dashboard modules, providing regulated power for infotainment and telematics.

Q: What is the output voltage?
A: Fixed 3.1V output.
Q: What is the maximum current?
A: Up to 500mA.
Q: What is the input voltage range?
A: Not specified in provided data; consult the datasheet.
Q: What is the dropout voltage?
A: 0.6V at 500mA load.
Q: What is the quiescent current?
A: Very low at 8µA.
Q: What package is used?
A: SOT-23-5.
Base Product Number : MIC5219-3.1BM5
3.1V 500mA LDO Linear Regulator Low Quiescent Current Micrel SOT-23-5
Q: What is the output voltage?
A: Fixed 3.1V output.
Q: What is the maximum current?
A: Up to 500mA.
Q: What is the input voltage range?
A: Not specified in provided data; consult the datasheet.
Q: What is the dropout voltage?
A: 0.6V at 500mA load.
Q: What is the quiescent current?
A: Very low at 8µA.
Q: What package is used?
A: SOT-23-5.