Diodes Incorporated AP2115M-1.2TRG1

Overview

AP2115M-1.2TRG1 from BCD Semiconductor is a 1.2V fixed-output, 1A CMOS low-dropout linear regulator with enable control, ±1.5% output accuracy, 450mV typical dropout at 1A (for 3.3V version; 1.2V variant achieves 1.2V output from ≥2.5V input), and 30µV_RMS output noise-designed for stable power delivery in LCD monitor and STB mainboard voltage rails.

For engineers reviewing the AP2115M-1.2TRG1 datasheet, AP2115M-1.2TRG1 pinout, AP2115M-1.2TRG1 application, or AP2115M-1.2TRG1 equivalent, this part supports low-noise, high-accuracy 1.2V core supply in space-constrained SOIC-8 layouts with thermal shutdown, fold-back short-circuit protection, and compatibility with ceramic, tantalum, and aluminum electrolytic output capacitors.

Technical Context

The AP2115M-1.2TRG1 integrates a CMOS pass transistor with internal reference, error amplifier, and enable logic to regulate 1.2V output from input voltages as low as 2.5V. Its architecture delivers stable regulation across -40°C to +85°C ambient while maintaining ≤0.2%/A load regulation and 0.02%/V line regulation under 30mA load.

It features active thermal shutdown at 160°C with 25°C hysteresis, 60µA quiescent current (1.2V/1.8V/2.5V versions), and 68dB PSRR at 1kHz-enabling clean power for noise-sensitive analog and mixed-signal circuits without external compensation.

Key Specifications

Pinout & Package

AP2115M-1.2TRG1 is supplied in SOIC-8 package (JEDEC MS-012AC), with exposed pad not electrically connected. Thermal resistance θ_JC = 74.6°C/W enables reliable 1A operation with minimal PCB copper area.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AP2115M-1.2TRG1, AP2112K-1.2TRG1 trades 40% current capacity for 40% smaller footprint and lower cost, while MCP1700T-1202E/TT sacrifices 95% output current to achieve 97% lower quiescent current-making neither a drop-in substitute for 1A, SOIC-8–based designs.

Availability

AP2115M-1.2TRG1 is available at Aetrix Electronics and suitable for LCD monitor power rails, set-top box core supplies, and industrial HMI controllers requiring stable component supply with RoHS-compliant green packaging and tape-and-reel delivery.

Supply support for AP2115M-1.2TRG1 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 IC foundry and fabless designer specializing in high-performance power management, LED drivers, and mixed-signal solutions for consumer and industrial markets.

The AP2115 series belongs to BCD's low-noise LDO product line, engineered specifically for noise-sensitive applications in LCD/LED displays and digital entertainment equipment where accuracy, stability, and capacitor flexibility are critical.

FAQ

What input voltage range is supported by AP2115M-1.2TRG1?

The AP2115M-1.2TRG1 operates with input voltages from 2.5V to 6.0V. Minimum input is defined by dropout requirements: to sustain 1.2V output at 1A, VIN must exceed 2.4V (typical) or 2.5V (guaranteed). Operation below 2.5V risks regulation loss or thermal shutdown.

Does AP2115M-1.2TRG1 require an external capacitor on the EN pin?

No external capacitor is required on the EN pin. The device includes a 3.0MΩ internal pull-down resistor ensuring default OFF state, and the enable threshold (VIH = 1.5V, VIL = 0.4V) is compatible with standard logic families. Adding capacitance may slow startup but is not necessary for functionality.

Can AP2115M-1.2TRG1 be used with aluminum electrolytic output capacitors?

Yes-the AP2115M-1.2TRG1 is explicitly characterized for stability with 4.7µF aluminum electrolytic, ceramic, and tantalum capacitors. ESR range compatibility (0.01Ω–1Ω) eliminates need for low-ESR specialty capacitors, reducing BOM cost and simplifying sourcing.

How does thermal performance differ between SOIC-8 and SOT-89-5 packages?

SOIC-8 has θ_JC = 74.6°C/W; SOT-89-5 has θ_JC = 47°C/W. For 1A operation at 85°C ambient, SOIC-8 requires more PCB copper area or airflow to maintain safe junction temperature, whereas SOT-89-5 offers superior thermal dissipation in compact layouts but occupies more vertical height.