Diodes Incorporated AP2115M-2.5TRG1

Overview

AP2115M-2.5TRG1 from BCD Semiconductor Manufacturing Limited is a fixed-output 2.5V, 1A CMOS low-dropout linear regulator with enable control, ±1.5% output accuracy, 450mV typical dropout at 1A, and 30µV_RMS output noise. It operates from 3.5V to 6.0V input, supports ceramic/tantalum/electrolytic output capacitors (≥4.7µF), and delivers stable power in LCD monitor and STB power rails.

For engineers reviewing the AP2115M-2.5TRG1 datasheet, AP2115M-2.5TRG1 pinout, AP2115M-2.5TRG1 application, or AP2115M-2.5TRG1 equivalent, key selection criteria include dropout voltage under full load, PSRR at 1kHz (65dB), thermal shutdown threshold (160°C), and SOIC-8 package compatibility with existing PCB layouts for industrial display power domains.

Technical Context

The AP2115M-2.5TRG1 integrates a CMOS pass transistor with fold-back short-circuit protection (50mA limit), OTSD thermal shutdown with 25°C hysteresis, and internal EN logic compatible with 1.5V high / 0.4V low thresholds. Its architecture enables fast 20µs startup and stable regulation across -40°C to 85°C ambient.

It achieves 0.2%/A load regulation and 0.02%/V line regulation while maintaining 60µA quiescent current at 2.5V output - optimized for low-noise analog supply domains where PSRR (65dB @ 1kHz) and RMS noise (30µV) directly impact signal integrity in video timing circuits.

Key Specifications

Pinout & Package

AP2115M-2.5TRG1 uses the SOIC-8 package (JEDEC MS-012AC, 150mil width), with exposed pad thermally connected to GND for enhanced thermal performance (θ_JC = 74.6°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1703T-2502E/MB and XC6219B251MR-G, the AP2115M-2.5TRG1 uniquely combines 1A output, SOIC-8 thermal robustness, and 30µV_RMS noise - making it the sole viable option for noise-sensitive, high-current 2.5V analog rails in commercial displays.

Availability

AP2115M-2.5TRG1 is available at Aetrix Electronics and suitable for LCD monitor power rails, set-top box AV core supplies, and industrial display backlight control requiring stable component supply, RoHS-compliant packaging, and tape-and-reel delivery for automated SMT assembly.

Supply support for AP2115M-2.5TRG1 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-reliability, cost-optimized solutions for consumer and industrial markets.

The AP2115 series targets low-noise, high-current local regulation in display electronics - designed specifically to replace discrete regulators and older bipolar LDOs in LCD TV, monitor, and STB power architectures.

FAQ

What is the minimum input voltage required for AP2115M-2.5TRG1 to maintain regulation at 1A load?

The minimum input voltage is 3.5V, derived from the 2.5V output plus 450mV typical dropout voltage (2.5V + 0.45V = 2.95V), with 3.5V specified in Recommended Operating Conditions to ensure margin across process, voltage, and temperature variations. Operation below 3.5V risks dropout and output collapse under full load.

Can AP2115M-2.5TRG1 be used with aluminum electrolytic output capacitors?

Yes - the datasheet explicitly states stability with 4.7µF aluminum electrolytic, ceramic, or tantalum capacitors. Unlike many CMOS LDOs, its internal compensation does not require low-ESR ceramics exclusively, enabling cost-effective and temperature-stable designs in industrial environments where electrolytics offer superior lifetime at elevated temperatures.

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

The EN pin has an internal 3.0MΩ pull-down resistor and requires ≥1.5V to enable regulation. During power-up, VIN must stabilize before EN rises above 1.5V to prevent premature activation and potential current surge; this sequencing is enforced by the 20µs startup delay, ensuring output ramps cleanly only after input rail integrity is confirmed.

Is thermal shutdown reversible without cycling power?

Yes - thermal shutdown activates at 160°C junction temperature and releases at 135°C due to 25°C hysteresis. Once junction temperature falls below the release threshold, regulation resumes automatically without requiring EN toggling or input power cycle, supporting graceful recovery in thermally constrained enclosures.