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AP2127K-3.3TRG1

DIOAP2127K-3.3TRG1

Diodes Incorporated
Linear Voltage Regulator IC Positive Fixed 1 Output 300mA SOT-23-5
Active85,540 in stock
Datasheet Digi-Key Compare Prices

Overview

The AP2127K-3.3TRG1 is a 300mA positive fixed linear voltage regulator designed for stable 3.3V output from input voltages up to 6V. It features a fast response time and low noise performance in a compact SOT-23-5 package, making it suitable for space-constrained power stages. The device includes integrated protection features such as over-temperature shutdown and short-circuit current limiting.

Why Choose This Part

This regulator offers high PSRR of up to 68dB for noise-sensitive applications and maintains a low quiescent current of 60uA. It includes an auto-discharge function to ensure power rails are safely pulled down when disabled and provides excellent line and load regulation across the -40C to 85C temperature range.

Applications

Microcontroller Power Rails
Provides a clean 3.3V supply for MCUs and digital logic in battery-powered or USB-connected devices.
Notebook and Motherboard Sub-systems
Used for localized voltage regulation in PC hardware where low dropout and small footprint are required.
Datacom Equipment
Supplies stable power to communication ICs requiring low noise and thermal protection.

Key Specifications

PSRR 68dB ~ 54dB (100Hz ~ 10kHz)
Output Type Fixed
Mounting Type Surface Mount
Package / Case SC-74A, SOT-753
Current - Output 300mA
Protection Features Over Current, Over Temperature
Number of Regulators 1
Output Configuration Positive
Operating Temperature -40degC ~ 85degC
Voltage - Input (Max) 6V
Voltage Dropout (Max) 0.3V @ 300mA
Supplier Device Package SOT-23-5
Current - Quiescent (Iq) 90 uA
Voltage - Output (Min/Fixed) 3.3V

Getting Started

To implement this LDO, place a 1uF ceramic capacitor close to the input and output pins for stability. Ensure the SOT-23-5 footprint includes sufficient copper for heat dissipation if operating near the 300mA maximum current limit. Refer to the datasheet for specific ESR requirements of the output capacitor to prevent oscillation.

Part of Positive LDO regulators family » AP2127

AP2127 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number PSRR Output Type Output V Stock
AP2127K-3.3TRG1 (this part) 100Hz Fixed 3.3V 85,540
AP2127K-ADJTRG1 100Hz Adjustable 0.8V 70,547

Also Consider

AP2112K-3.3TRG1 DIODiodes Incorporated - Offers a higher 600mA output current capability in the same SOT-23-5 footprint.
MIC5504-3.3YM5 MCHPMicrochip Technology - Provides a similar 300mA output in a SOT-23-5 package with integrated pull-down discharge.

Categories

Power Management > LDO Voltage Regulators