Product Overview

AP2112K-3.3TRG1 is a high-performance CMOS low dropout linear regulator with SOT25 package, featuring core parameters of 3.3V fixed output voltage and 600mA minimum continuous load current, with an output voltage accuracy of up to ±1.5%. The device integrates enable control and auto-discharge functions, with a typical dropout voltage of only 250mV at 600mA load, and combines low quiescent current, high power supply rejection ratio (PSRR) and comprehensive protection mechanisms. Compliant with RoHS and halogen-free environmental standards, it is an ideal power supply regulator for portable and consumer electronic devices such as laptop computers, LCD monitors, and portable DVDs.

Key Features

• High-precision output: Output voltage accuracy of ±1.5% ensures voltage stability of the power supply circuit
• Large load capacity: Supports a minimum of 600mA continuous load current to meet the power supply needs of low-to-medium power devices
• Low-power design: Typical quiescent current is only 55μA, and standby current is as low as 0.01μA, reducing device energy consumption
• Multi-function integration: Built-in enable switch and 60Ω auto-discharge resistor, along with thermal shutdown and foldback short-circuit protection
• High compatibility: Only requires a 1μF output capacitor for stable operation, compatible with ceramic, tantalum, aluminum electrolytic and other capacitor types

Technical Specifications

Typical Applications

1. Laptop Computer Power Supply

In the peripheral interfaces and auxiliary control circuits of laptop computers, the 3.3V stable output of AP2112K-3.3TRG1 can ensure the power supply stability of USB interfaces, touchpads and other modules. The 600mA load capacity can meet the current demand of multiple peripherals working simultaneously, and the low quiescent current can extend the battery life of the laptop.

2. LCD Monitor Power Supply

For the driver board and backlight control circuit of LCD monitors, the ±1.5% voltage accuracy of this device can avoid screen flickering or color cast caused by voltage fluctuations. The high PSRR can effectively suppress the interference of power supply ripple on display signals, and the small SOT25 package is suitable for the compact PCB layout inside the monitor.

3. Portable DVD Power Supply

In the power supply circuit of the main control chip and decoding module of portable DVDs, the low dropout characteristic of AP2112K-3.3TRG1 can maintain stable output even when the battery voltage drops. The enable function supports turning off the regulated output when the device is in sleep mode, and the auto-discharge function can quickly release the residual charge at the output terminal, improving the switching response speed of the device.

4. Smart Home Control Modules

In low-power smart home devices such as smart door locks and temperature and humidity sensors, its 55μA low quiescent current can reduce the standby power consumption of the device, the 600mA load capacity can meet the instantaneous current demand of the control chip and communication module, and the comprehensive protection mechanism can also improve the reliability of the device in complex power grid environments.

5. Portable Medical Instruments

For the signal processing circuits of portable medical devices such as blood pressure monitors and blood glucose meters, the high-precision output of this LDO can ensure the accuracy of sensor data collection, the wide temperature range of -40℃~+85℃ can adapt to different usage environments, and the thermal shutdown protection can avoid device damage due to abnormal heating.

Why Choose AP2112K-3.3TRG1 ?

• Balanced performance: Combines high precision, large load capacity and low dropout, suitable for low-to-medium power voltage regulation in multiple scenarios
• Energy saving and consumption reduction: Microampere-level quiescent and standby currents help portable devices achieve long battery life design
• Circuit simplification: Only requires 1μF input/output capacitors for stable operation, reducing the complexity of peripheral circuit design
• High reliability: Integrates thermal shutdown and short-circuit protection, with ESD protection capability of HBM 4000V, improving device durability
• Small-size adaptation: The compact SOT25 package meets the miniaturization and high-density integration needs of consumer electronic devices

SUNTOP COMPANY INTRODUCTION

Founded in 2000, Suntop is one of the leading global distributors of electronic components, dedica ted to providing comprehensive procurement and supply chain services to the global electronics manufacturing industry. Our services include distribution, spot trading, PPV cost-saving projects, and inventory management. We not only offer high-quality products but also strive to assist our clients in achieving optimal solutions with minimal time and cost.
As a trusted partner for numerous OEMs, ODMs, CEMs, and EMS companies worldwide, our professional team manages millions of component records from thousands of trading partners across dozens of countries daily through our company database. We maintain close business relationships with major factories and distributors in North America, Europe, and Asia to ensure that our clients stay ahead in a highly competitive market.