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MIC5219-3.3YM5-TR

500mA peak ultra-low-noise LDO, 3.3V fixed output, SOT-23-5, 2.5-12V input, 350mV dropout @ 500mA, 80uA Iq, PSRR 75dB, -40C to +125C.

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Manufacturer Part：

MIC5219-3.3YM5-TR

Package：

SOT-23-5 (2.9 x 1.6 x 1.1mm)

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Description

Product Overview

The MIC5219-3.3YM5-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 3.3 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 3.3 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
Line Regulation 0.009%/V typ
Load Regulation 0.05% typ
Operating Temperature -40 °C to +125 °C
Package SOT-23-5 (2.9 x 1.6 x 1.1 mm)

Features

  • Ultra-low noise output with BYP pin bypass capacitor
  • Near-zero shutdown current 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 output capacitor required
  • Available in fixed and adjustable output voltage versions

Applications

  • RF / wireless module power supply
  • Audio circuit low-noise supply
  • Battery-powered devices
  • GSM/GPRS module peak-current supply
  • USB-powered devices
  • 3.3 V logic power rail

The MIC5219-3.3YM5-TR is a 500mA peak-output ultra-low-noise LDO from Microchip (formerly Micrel) in SOT-23-5 package. Fixed 3.3V output with +/-1% accuracy. 350mV typical dropout at 500mA and 80uA quiescent current. BYP pin with 470pF capacitor enables ultra-low noise for RF applications. Near-zero shutdown current (<1uA). CMOS/TTL-compatible enable pin. Current limit, thermal shutdown, and reverse-battery protection included.

The MIC5219 uses a CMOS P-channel MOSFET pass element, so ground current does not increase significantly with load unlike bipolar LDOs. A bandgap reference provides a precise voltage reference; the error amplifier compares the feedback voltage with the reference and drives the P-MOSFET gate to regulate the output. The BYP pin connects to the internal reference; a 470pF capacitor filters reference noise for ultra-low output noise. EN pin controls the P-MOSFET; shutdown reduces ground current to near-zero. Current limit and thermal shutdown protect against faults.

Pin SOT-23-5 Function Description
1 IN Input Supply 2.5V~12V
2 GND Ground –
3 EN Enable CMOS/TTL; HIGH=on
4 BYP Bypass / Adjust Fixed ver: 470pF cap to GND for noise
5 OUT Output 3.3V; 2.2uF tantalum cap
  • RF / wireless module power supply
  • Audio circuit low-noise supply
  • Battery-powered devices
  • GSM/GPRS module peak-current supply
  • USB-powered devices
  • 3.3V logic power rail
Model Type Notes
MIC5219-5.0YM5-TR Same family 5.0V fixed output version
MIC5219YM5-TR Same family Adjustable output version
TLV70033DDCR Functional equiv. TI 3.3V 200mA LDO; SOT-23-5
RT9193-33GB Functional equiv. Richtek 3.3V 300mA LDO
AP2112K-3.3 Functional equiv. BCD 3.3V 600mA LDO; SOT-23-5
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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.

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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