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MIC5319-3.3YD5-TR

500mA LDO, 3.3V fixed, 150mV dropout, 70dB PSRR, SOT-23-5

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Manufacturer Part：

MIC5319-3.3YD5-TR

Package：

SOT-23-5 (2.9 x 1.6 x 1.0 mm)

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Description

Product Overview

The MIC5319-3.3YD5-TR from Microchip is a 500mA LDO regulator with fixed 3.3V output in a SOT-23-5 package. Featuring 150mV dropout at 500mA, low 24uA ground current, and PSRR of 70dB at 1kHz, it is designed for noise-sensitive RF and portable applications.

Key Specifications

Output Voltage 3.3V fixed
Output Current 500mA
Dropout Voltage 150mV @ 500mA
Ground Current 24uA typical
PSRR 70dB @ 1kHz
Output Noise 30uVrms @ 10Hz-100kHz
Input Voltage 2.7V ~ 5.5V
Package SOT-23-5
Operating Temperature -40°C to +125°C

Features

  • Fixed 3.3V output with +/-2% accuracy
  • 150mV dropout at full 500mA load
  • Very low 24uA ground current
  • 70dB PSRR at 1kHz for noise rejection
  • 30uVrms output noise for RF applications
  • Enable pin for power sequencing

Applications

  • RF transceiver power supply
  • Portable and battery-powered devices
  • Smartphone and tablet subsystem power
  • USB-powered peripherals
  • Low-noise analog and sensor supply

The MIC5319-3.3YD5-TR from Microchip is a 500mA LDO regulator providing fixed 3.3V output in a tiny SOT-23-5 package. With 150mV dropout at full load, it can regulate 3.3V from a 3.5V input. The very low 24uA ground current maximizes battery life. Excellent PSRR of 70dB at 1kHz and low 30uVrms output noise make it ideal for powering noise-sensitive RF transceivers and precision analog circuits. The enable pin supports power sequencing and shutdown. The device includes current limit and thermal shutdown protection.

The MIC5319-3.3YD5-TR uses a P-channel MOSFET pass element with an error amplifier comparing a divided output voltage to an internal bandgap reference trimmed to 3.3V. When the input-output differential drops below dropout, the P-channel MOSFET enters the triode region and VOUT tracks VIN minus the dropout voltage. The low 24uA ground current results from the CMOS error amplifier design, which draws minimal bias current. The high PSRR is achieved by the error amplifier’s loop gain, which attenuates input ripple. The enable pin controls the pass element gate; when disabled, output is high-impedance and ground current drops to <0.1uA.

Pin Name Type Function
1 IN Power Input voltage (2.7-5.5V)
2 GND Power Ground
3 EN Input Enable (active high)
4 BYP Analog External bypass capacitor for noise reduction
5 OUT Power Regulated 3.3V output
  • WiFi/BLE transceiver 3.3V clean power supply
  • Smartphone and tablet sub-system LDO regulation
  • USB-powered peripheral 3.3V power rail
  • Precision analog sensor and ADC reference supply
  • Battery-powered IoT device 3.3V regulation
Manufacturer Part Number Package Notes
TI TLV70033DDCR SOT-23-5 300mA, 3.3V, very low Iq
Microchip MIC5319-1.8YD5-TR SOT-23-5 Same family, 1.8V output
Diodes Inc AP2112K-3.3TRG1 SOT-23-5 600mA, 3.3V, compatible
TI TLV74333PDBVR SOT-23-5 300mA, high PSRR 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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