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MIC5219-2.8YM5-TR

500mA LDO, 2.8V fixed, 150mV dropout, low noise, SOT-23-5

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Manufacturer Part：

MIC5219-2.8YM5-TR

Package：

SOT-23-5 (2.9×1.6×1.1 mm)

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Description

Product Overview

The MIC5219-2.8YM5-TR is a 500mA low-dropout (LDO) voltage regulator from Microchip Technology. It provides a fixed 2.8V output with ultra-low noise and high PSRR, making it ideal for RF and noise-sensitive applications. Packaged in a SOT-23-5, it features enable control, current limiting, and thermal shutdown protection.

Key Specifications

Output Voltage 2.8V (Fixed)
Maximum Output Current 500 mA
Input Voltage Range 2.5V to 16V
Dropout Voltage 150 mV @ 150 mA
PSRR 70 dB @ 1 kHz
Output Noise 50 nV/√Hz
Quiescent Current 450 µA (typical)
Shutdown Current 0.01 µA (typical)
Output Capacitor Ceramic compatible
Operating Temperature -40°C to +125°C
Package SOT-23-5

Features

  • Ultra-low noise: 50 nV/√Hz output noise density
  • High PSRR: 70 dB at 1 kHz for supply noise rejection
  • Very low dropout: 150 mV at 150 mA load
  • Enable pin with <0.01 µA shutdown current
  • Stable with ceramic output capacitor (0.47 µF min)
  • Active pulldown on output for fast discharge
  • Current limit and thermal shutdown protection

Applications

  • RF and wireless transceiver power supply
  • Mobile phone and smartphone LDO regulation
  • Audio codec and DAC/ADC reference
  • GPS receiver power management
  • Battery-powered portable instruments

The MIC5219-2.8YM5-TR from Microchip Technology is a 500mA low-dropout voltage regulator with a fixed 2.8V output. It combines ultra-low noise (50 nV/√Hz) with high PSRR (70 dB @ 1 kHz), making it ideal for RF transceiver and noise-sensitive analog power supply applications. The device features an enable pin with near-zero shutdown current, active output pulldown, and stability with ceramic capacitors.

The MIC5219 uses a PNP pass transistor in a common-emitter configuration, which allows the very low dropout voltage. A bandgap reference provides a stable voltage that is compared with a fraction of the output by the error amplifier. The error amplifier drives the PNP pass transistor to maintain output regulation. The enable pin controls the bias circuitry, reducing quiescent current to <0.01 µA in shutdown. Current limiting is implemented by sensing pass transistor current, and thermal shutdown protects against excessive junction temperature.

Pin Name Type Function
1 IN Input Input voltage (2.5-16V)
2 GND Power Ground
3 EN Input Enable (active high)
4 BYP Input Noise bypass capacitor (optional, for lowest noise)
5 OUT Output Regulated 2.8V output
  • RF transceiver VCO and PA power supply requiring ultra-low noise
  • Mobile phone and smartphone baseband power regulation
  • Audio DAC and codec reference voltage supply
  • GPS receiver low-noise power management
  • Portable medical instrument precision analog supply
Manufacturer Part Number Package Notes
Microchip MIC5219-3.3YM5-TR SOT-23-5 3.3V output variant
Microne ME6211C28M5G SOT-23-5 2.8V output, 500mA, similar specs
TI TPS73628DBVR SOT-23-5 400mA LDO, 2.8V, very low noise
Torex XC6220B281MR SOT-25 2.8V, 300mA, high PSRR
Microchip MIC5205-2.8YM5-TR SOT-23-5 150mA, lower cost alternative
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Tel / WhatsApp: +86 13760382860

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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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