MIC5219-5.0 500mA Peak LDO Regulator SOT23-5

Description

MIC5219-5.0 500mA Peak LDO Regulator SOT23-5

Description

The MIC5219-5.0 is a high-performance low dropout (LDO) linear regulator capable of sourcing 500mA (peak) with very low dropout voltage and low ground current. Designed for space-constrained applications, it offers high accuracy and low noise, making it suitable for powering microcontrollers, RF modules, sensors, and digital ICs from battery-powered sources.

Specifications

• Type: Low Dropout (LDO) Linear Regulator

• Output Voltage: 5.0V fixed

• Input Voltage Range: 2.5V – 12V

• Output Current:

  • 500mA peak

  • ~150–300mA continuous depending on thermal conditions

• Dropout Voltage:

  • ~60 mV @ 100 mA load

  • ~500 mV @ 500 mA load

• Quiescent Current: ~90 µA (typical)

• Shutdown Current: <1 µA (when EN = LOW)

• Accuracy: ±2% over line, load, and temperature

• Output Noise: 260 µVrms (10 Hz – 100 kHz) with bypass capacitor

• PSRR (Power Supply Rejection Ratio): 75 dB @ 1 kHz

• Thermal Protection: Built-in thermal shutdown & current limiting

• Enable Pin: Yes (active high, can be used for power sequencing)

• Package: SOT-23-5

Key Features

• Low dropout (ideal for battery-powered systems)

• 500mA peak output capability

• Very low quiescent current (extends battery life)

• High PSRR for noise-sensitive analog/RF applications

• Low shutdown current (<1 µA)

• Overcurrent and thermal protection

• Tiny SOT-23-5 package for compact PCB design

Applications

• Portable and battery-powered electronics

• Microcontroller and logic power supplies (Arduino, ESP32, STM32, etc.)

• RF modules, wireless transceivers, and sensors

• Post-regulation for DC-DC converters

• Noise-sensitive analog and audio circuits

⚡ The MIC5219-5.0 is often used in Arduino/ESP breakout boards and RF modules where stable 5V output and low dropout are required.