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Home > Power Management ICs (PMIC) > Low Dropout Regulators (LDO) > MIC5219-2.8YM5-TR

MIC5219-2.8YM5-TR

500mA-peak LDO, 2.8V fixed +/-1%, 350mV dropout @ 500mA, 80uA Iq, ultra-low noise w/ BYP pin, SOT-23-5, -40 to +125C

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Manufacturer Part：

MIC5219-2.8YM5-TR

Package：

SOT-23-5 / SC-74A / SOT-753 (2.9 x 1.6 x 1.1 mm, 0.95mm pitch, Surface Mount)

Brand：
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Description

Product Overview

The MIC5219-2.8YM5-TR is a 500 mA peak-output ultra-low-noise LDO linear regulator from Microchip (formerly Micrel) in a SOT-23-5 package. It provides a fixed 2.8 V output with +/-1% accuracy from a 2.5 V to 12 V input. The BYP pin with an external 470 pF capacitor enables ultra-low output noise for RF-sensitive applications. Near-zero shutdown current (<1 μA) and CMOS/TTL-compatible enable control make it ideal for battery-powered and portable devices.

Key Specifications

Output Voltage 2.8 V fixed (+/-1% typ)
Max Output Current 500 mA peak
Input Voltage 2.5 V to 12 V
Dropout Voltage 350 mV typ @ 500 mA / 115 mV typ @ 50 mA
Quiescent Current 80 μA typ @ light load
Shutdown Current <1 μA typ
PSRR 75 dB @ 120 Hz
Output Noise (with BYP cap) 300 nV/√Hz typ
Output Noise (without BYP cap) 500 nV/√Hz typ
Line Regulation 0.009%/V typ
Load Regulation 0.05% typ
Current Limit 700 mA typ
Operating Temperature -40 °C to +125 °C
Package SOT-23-5 (2.9 x 1.6 x 1.1 mm)
Packaging Tape & Reel (3000/reel)

Features

  • Ultra-low noise output with BYP pin bypass capacitor (470 pF to GND)
  • Near-zero shutdown current (<1 μA) extends battery life
  • CMOS P-MOSFET pass element: ground current does not increase with load
  • Current limit, thermal shutdown, and reverse-battery protection
  • Only 2.2 μF tantalum or 1 μF ceramic output capacitor required
  • CMOS/TTL-compatible enable/shutdown control

Applications

  • RF / wireless module power supply (2.8 V rail)
  • Audio circuit low-noise supply
  • Battery-powered portable devices
  • GSM/GPRS module peak-current supply
  • USB-powered devices
  • 2.8 V logic / I/O power rail

The MIC5219-2.8YM5-TR from Microchip (formerly Micrel) is a 500 mA peak-output low-dropout linear regulator with a fixed 2.8 V output. It features ultra-low noise performance via a BYP bypass pin (470 pF capacitor to GND reduces output noise to 300 nV/sqrt-Hz), +/-1% output voltage accuracy, and a low 350 mV typical dropout voltage at full load. The 80 uA quiescent current and near-zero shutdown current (<1 uA) make it ideal for battery-powered applications. The CMOS P-MOSFET pass element ensures ground current remains nearly constant regardless of load. Built-in protections include current limiting, thermal shutdown, and reverse-battery protection.

The MIC5219 uses a P-channel MOSFET pass transistor controlled by an error amplifier that compares a fraction of the output voltage (from an internal resistor divider for fixed-voltage versions) against a precision bandgap reference. The error amplifier drives the PMOS gate to regulate the output. A unique BYP pin connects to the reference voltage node through an internal resistor; an external 470 pF capacitor on this pin filters reference noise, achieving ultra-low output noise. The enable pin controls a CMOS/TTL-compatible shutdown circuit that disconnects the pass transistor, reducing supply current to below 1 uA. Current limiting is implemented by sensing the pass transistor current and clamping the gate drive. Thermal shutdown activates at approximately 160 degC with 15 degC hysteresis. The reverse-battery protection circuit prevents damage when input polarity is reversed.

Pin Name Function Description
1 IN Supply Input 2.5V to 12V; 1uF input cap recommended
2 GND Ground Common ground reference
3 EN Enable CMOS/TTL compatible; High=enable, Low/open=shutdown
4 BYP Bypass/Noise Reduction Connect 470pF cap to GND for ultra-low noise; may be left open
5 OUT Regulator Output 2.8V fixed; 2.2uF tantalum or 1uF ceramic cap required
  • RF/wireless module 2.8V power supply with ultra-low noise requirement
  • Battery-powered portable electronics requiring long standby life
  • GSM/GPRS module peak-current supply during transmit bursts
  • Audio codec and DAC clean power rail
  • 2.8V I/O voltage rail for FPGA/ASIC power sequencing
  • USB-powered device regulation
Model Type Description
MIC5219-3.3YM5-TR Same series 3.3V output version; identical package and pinout; most common variant
MIC5219-2.85YM5-TR Same series 2.85V output; closest voltage variant; for 2.85V logic rails
MIC5219-3.0YM5-TR Same series 3.0V output version; for 3.0V systems
AP2112-2.8VSRG1 Functional equivalent Diodes Inc 600mA LDO, 2.8V, SOT-23-5; higher current rating
TLV70028DBVR Functional equivalent TI 300mA LDO, 2.8V, SOT-23-5; lower Iq (38uA) but lower current
RT9193-28GB Functional equivalent Richtek 300mA LDO, 2.8V, SOT-23-5; cost-effective alternative
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Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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