Parts Power Management LDO Voltage Regulators AP2112 / AP7361 LDO Family AP2112K AP2112K-3.3

DIOAP2112K-3.3

Name: AP2112K-3.3
Brand: Diodes Incorporated

Diodes Incorporated

LDO Voltage Regulators 600mA CMOS LDO 50mA 3.3V 250mV

109,692 in stock

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Overview

The AP2112K-3.3 is a 600mA CMOS low dropout linear regulator specifically designed to provide a stable 3.3V output from input sources up to 6V. It features a low quiescent current of 55uA typical and a low dropout voltage of 250mV, making it efficient for battery-powered applications. The device includes an enable pin for power sequencing and integrated protection features like foldback short-circuit protection and thermal shutdown.

Why Choose This Part

This regulator offers high output accuracy of 1.5 percent and excellent PSRR of 65dB for noise-sensitive circuits. The SOT-25 package provides a small footprint while including an auto-discharge function that ensures the output capacitor is safely discharged when the device is disabled.

Applications

Laptop and Notebook Peripherals

Providing regulated 3.3V power to internal modules and interface controllers where space is limited.

Battery-Powered Handheld Devices

Utilizing the low 55uA quiescent current and 0.01uA standby current to extend battery life in portable electronics.

LCD Monitor Power Rails

Supplying stable low-noise power to control logic and display driver circuits.

Portable DVD Players

Regulating power for optical drive controllers and signal processing ICs requiring up to 600mA.

Key Specifications

PSRR 65dB (100Hz ~ 1kHz)

Output Type Fixed

Mounting Type Surface Mount

Package / Case SC-74A, SOT-753

Control Features Enable

Current - Output 600mA

Protection Features Over Current, Over Temperature

Number of Regulators 1

Output Configuration Positive

Operating Temperature -40degC ~ 85degC

Voltage - Input (Max) 6V

Voltage Dropout (Max) 0.4V @ 600mA

Supplier Device Package SOT-25

Current - Quiescent (Iq) 80 uA

Voltage - Output (Min/Fixed) 3.3V

Getting Started

To implement this LDO, place a 1.0uF ceramic capacitor close to both the input and output pins for stability. Connect the EN pin to a logic high signal or VIN to enable the regulator; if power-down control is required, use a microcontroller GPIO to pull the EN pin low. Ensure the PCB layout provides adequate copper area for thermal dissipation since the device operates up to 85 degrees Celsius.

Part of AP2112 / AP7361 LDO family » AP2112K

AP2112K Family

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

Part Number	Voltage Dropout (Max)	Output V	Stock
AP2112K-3.3 (this part)	0.4V	3.3V	109,692
AP2112K-3.3TRG1	0.4V	3.3V	57,293
AP2112K-1.8TRG1	0.7V	1.8V	46,028

Also Consider

TLV75533P TITexas Instruments - Provides a similar 500mA output with a smaller typical dropout voltage of 238mV and faster transient response.

MCP1700 MCHPMicrochip Technology - Ideal for ultra-low power applications with a significantly lower quiescent current of 1.6uA, though with a lower 250mA output limit.