Diodes Incorporated AP2112K-2.6TRG1

Overview

AP2112K-2.6TRG1 from Diodes Incorporated is a fixed-output 2.6V, 600mA CMOS low-dropout linear regulator with enable control and auto-discharge functionality, delivering ±1.5% output accuracy, 250mV typical dropout at full load, and 50µV_RMS output noise - deployed in portable power rails for LCD monitors and embedded microcontroller core supplies.

For engineers reviewing the AP2112K-2.6TRG1 datasheet, AP2112K-2.6TRG1 pinout, AP2112K-2.6TRG1 application, or AP2112K-2.6TRG1 equivalent, key selection criteria include guaranteed 600mA load capability, thermal shutdown at +160°C, EN logic compatibility (0–0.4V low / 1.5–6.0V high), and stable operation with 1.0µF ceramic, tantalum, or aluminum electrolytic output capacitors.

Technical Context

The AP2112K-2.6TRG1 implements a CMOS-based LDO architecture with internal voltage reference, error amplifier, and pass transistor, optimized for fast transient response to line and load steps. Its foldback current limiting activates at 50mA during short-circuit conditions, and thermal shutdown triggers at +160°C with +25°C hysteresis.

It features an integrated 60Ω discharge path from VOUT to GND when EN is low, enabling rapid output discharge in power sequencing applications. The device operates across –40°C to +85°C ambient temperature and supports input voltages from 2.5V to 6.0V, with PSRR of –65dB at both 100Hz and 1kHz.

Key Specifications

Pinout & Package

SOT25 (also designated SOT-23-5) package: compact 5-pin surface-mount outline with exposed thermal pad (not electrically connected), optimized for space-constrained PCB layouts and moderate power dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700-2602E/TO and XC6206P262MR-G, the AP2112K-2.6TRG1 uniquely delivers 600mA output with integrated EN, auto-discharge, thermal shutdown, and ±1.5% accuracy - making it the only option among the three qualified for industrial display and medical sensor power rails requiring robustness and precision.

Availability

AP2112K-2.6TRG1 is available at Aetrix Electronics and suitable for portable LCD monitor power, laptop subsystem rails, industrial HMI displays, and medical sensor modules requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for AP2112K-2.6TRG1 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

Diodes Incorporated is a global semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions, with emphasis on power management, signal integrity, and protection devices for industrial, computing, and consumer markets.

The AP2112 product line delivers high-accuracy, low-noise CMOS LDOs targeting space- and power-constrained applications including portable displays, embedded controllers, and sensor interfaces - designed for reliability across –40°C to +85°C operation.

FAQ

What is the minimum input voltage required for AP2112K-2.6TRG1 to regulate 2.6V output?

The AP2112K-2.6TRG1 requires a minimum input voltage of 2.5V per its Recommended Operating Conditions. At 600mA load, the typical dropout is 250mV, so VIN must be ≥2.85V to guarantee regulation. Below 2.5V, the device may enter dropout or cease regulation entirely.

Does AP2112K-2.6TRG1 require an external pull-up resistor on the EN pin?

No. The EN pin includes an internal 3.0MΩ pull-down resistor, ensuring the device remains disabled when left floating. An external pull-up is only needed if active-high enable must be asserted by default at power-on - otherwise, direct GPIO control suffices.

Can AP2112K-2.6TRG1 operate with a 0.47µF ceramic output capacitor?

No. The datasheet specifies stability with ≥1.0µF output capacitance (ceramic, tantalum, or aluminum). Using 0.47µF risks instability, overshoot, or oscillation under load transients - confirmed by the "Stable with 1.0µF Flexible Cap" feature and typical application circuit.

What is the thermal resistance (θ_JA) of the SOT25 package in standard JEDEC 2-layer board conditions?

The SOT25 package has a θ_JA of 184°C/W under standard JEDEC High-K test board conditions (2-layer, 1-in² copper). This value assumes no additional copper pour or thermal vias; adding a 10mm² thermal pad with 4–6 vias can reduce θ_JA by ~30–40°C/W in production layouts.