Diodes Incorporated AP2115M-3.3TRG1

Overview

AP2115M-3.3TRG1 from BCD Semiconductor is a 3.3V fixed-output, 1A CMOS low-dropout linear regulator with enable control, designed for stable local power regulation in noise-sensitive analog and digital subsystems. It delivers ±1.5% output accuracy, 450mV typical dropout at 1A, 30µV_RMS output noise, and operates across –40°C to +85°C in SOIC-8 packaging - used in LCD monitor power rails.

For engineers reviewing the AP2115M-3.3TRG1 datasheet, AP2115M-3.3TRG1 pinout, AP2115M-3.3TRG1 application, or AP2115M-3.3TRG1 equivalent, key selection criteria include guaranteed 1A load capability, low-noise performance under ceramic-capacitor stabilization (4.7µF), thermal shutdown protection, and compatibility with 2.5–6.0V input sources in space-constrained industrial displays.

Technical Context

The AP2115M-3.3TRG1 integrates a CMOS pass transistor with internal bandgap reference, error amplifier, and enable logic to regulate output voltage with high line/load regulation (0.02%/V typ., 0.2%/A). Its architecture supports fast start-up (20µs) and includes fold-back short-circuit protection (50mA limit) plus over-temperature shutdown (160°C trip).

It achieves 65dB PSRR at 1kHz and maintains stability with flexible 4.7µF output capacitors - including ceramic, tantalum, and aluminum electrolytic - eliminating need for ESR tuning. The device draws only 65–90µA quiescent current at 4.3V input and features an EN pin with 1.5V logic-high threshold and 0.4V logic-low threshold.

Key Specifications

Pinout & Package

AP2115M-3.3TRG1 is packaged in SOIC-8 (M suffix), with exposed pad thermal enhancement per manufacturer mechanical drawings. Pin functions are validated per Figure 2 (SOIC-8 top view) and Table "Pin Descriptions" in datasheet Rev 1.1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1703T-3302E/MB and TLS850B2TE/V33, AP2115M-3.3TRG1 uniquely combines 1A output, ±1.5% accuracy, enable control, thermal shutdown, and SOIC-8 footprint - making it optimal for high-current, noise-sensitive industrial and consumer display power rails where compact size and protection integrity are critical.

Availability

AP2115M-3.3TRG1 is available at Aetrix Electronics and suitable for LCD monitor power supplies, set-top box SoC rails, and industrial HMI display modules requiring stable component supply, RoHS-compliant green packaging, and tape-and-reel delivery for automated assembly.

Supply support for AP2115M-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 Shanghai-based analog and power IC designer specializing in high-performance, cost-optimized semiconductor solutions for consumer, industrial, and computing markets.

The AP2115 series belongs to BCD's precision LDO regulator product line, engineered specifically for noise-sensitive display and multimedia applications demanding high accuracy, low dropout, and robust protection in standard surface-mount packages.

FAQ

What input voltage range is supported by AP2115M-3.3TRG1?

The AP2115M-3.3TRG1 operates with an input voltage range of 2.5V to 6.0V, as specified in the Recommended Operating Conditions table. This allows direct use with 3.3V, 3.7V Li-ion, 5V USB, or 6V industrial rails while maintaining regulation down to 450mV dropout at full 1A load.

Does AP2115M-3.3TRG1 require an external resistor network for output voltage setting?

No - AP2115M-3.3TRG1 is a fixed-output regulator with internally trimmed 3.3V reference. It does not support adjustable output and requires no external feedback resistors, simplifying layout and reducing component count in space-constrained designs.

Can AP2115M-3.3TRG1 drive a 4.7µF ceramic capacitor safely?

Yes - the datasheet explicitly states stability with 4.7µF ceramic, tantalum, or aluminum electrolytic capacitors. No minimum ESR is required, and the device has been characterized for phase margin and transient response with ceramic caps, enabling low-profile, high-reliability designs.

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

The EN pin must be held ≥1.5V to enable regulation. With no external pull-up, the internal 3.0MΩ pull-down resistor ensures default OFF state. Start-up time is 20µs (no load), and the device enters ultra-low standby mode (<1µA) when EN is ≤0.4V, supporting precise power sequencing in multi-rail systems.