Diodes Incorporated AP2114D-3.3TRG1

Overview

AP2114D-3.3TRG1 from BCD Semiconductor Manufacturing Limited is a fixed-output 3.3V, 1A CMOS low-dropout linear regulator with enable control, designed for stable power delivery in noise-sensitive analog and digital subsystems. It delivers ±1.5% output accuracy, 450mV typical dropout at 1A, and 30μVRMS output noise, supporting LCD monitor and STB applications requiring clean, regulated 3.3V rails.

For engineers reviewing the AP2114D-3.3TRG1 datasheet, AP2114D-3.3TRG1 pinout, AP2114D-3.3TRG1 application, or AP2114D-3.3TRG1 equivalent, key selection criteria include guaranteed 1A load capability, thermal shutdown (160°C), fold-back short-circuit protection (50mA), compatibility with 4.7μF ceramic/tantalum/aluminum electrolytic output capacitors, and operation across –40°C to +85°C ambient.

Technical Context

The AP2114D-3.3TRG1 implements a CMOS-based LDO architecture with internal voltage reference (0.8V), precision error amplifier, and thermal-foldback current limiting. Its enable input (EN) provides logic-level control (VIH = 1.5V, VIL = 0.4V) for system power sequencing and standby mode with 0.01–1.0μA shutdown current.

It achieves high PSRR (65dB @ 1kHz) and tight line regulation (0.02%/V typ) via feedback loop stability optimized for 4.7μF output capacitance. The device integrates over-temperature shutdown with 25°C hysteresis and ESD protection (400V MM / 4000V HBM), targeting industrial and consumer power management where reliability and low noise are critical.

Key Specifications

Pinout & Package

AP2114D-3.3TRG1 uses the TO-252-2 (1)/(3)/(4) package - a 3-pin surface-mount DPAK variant with exposed thermal pad (pin 2 = VIN, pin 3 = VOUT, pin 1 = GND). Pin configuration matches standard TO-252-2 (1) layout: Pin 1 = GND, Pin 2 = VIN, Pin 3 = VOUT.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output LDO regulator applications.

Compared with MCP1700-3302E/TO and TLS850F3TAV50, AP2114D-3.3TRG1 uniquely balances 1A output, 30μVRMS noise, and TO-252-2 thermal performance at consumer-industrial cost - making it optimal for high-current, low-noise non-automotive embedded systems.

Availability

AP2114D-3.3TRG1 is available at Aetrix Electronics and suitable for LCD monitor power rails, set-top box core logic, and industrial HMI displays requiring stable component supply with RoHS-compliant green packaging (G1 suffix).

Supply support for AP2114D-3.3TRG1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

BCD Semiconductor Manufacturing Limited is a China-based fabless analog IC designer specializing in power management, LED drivers, and protection devices for consumer, industrial, and computing markets.

The AP2114 series targets cost-sensitive, high-volume applications needing robust, low-noise LDOs with flexible packaging - emphasizing manufacturability, thermal efficiency, and compatibility with standard PCB assembly processes.

FAQ

What is the minimum input voltage required for AP2114D-3.3TRG1 to regulate 3.3V at 1A?

The datasheet specifies a recommended minimum input voltage of 4.3V for full 1A operation at 3.3V output, based on the typical 450mV dropout voltage. At lower inputs (e.g., 4.0V), regulation may be lost under full load due to exceeding the dropout limit, causing output sag or thermal shutdown.

Can AP2114D-3.3TRG1 operate with a 2.2μF ceramic output capacitor?

No - the device requires ≥4.7μF output capacitance (ceramic, tantalum, or aluminum electrolytic) for guaranteed stability per the datasheet. Using 2.2μF risks oscillation, especially under transient load steps, and violates the design validation condition stated in all electrical characteristics tables.

Does AP2114D-3.3TRG1 support reverse-voltage protection?

No - the device lacks internal reverse-polarity protection. Applying reverse voltage to VIN or VOUT can damage the IC. External protection (e.g., series Schottky diode on VIN or back-to-back MOSFETs) is required in systems where input reversal is possible.

How does the EN pin behave during power-up sequencing?

The EN pin has an internal 3.0MΩ pull-down resistor, ensuring default shutdown until a valid high logic level (≥1.5V) is applied. This prevents uncontrolled turn-on during input ramp-up, enabling controlled power sequencing where EN is driven by a supervisor IC or delayed GPIO.