Diodes Incorporated AP2112M-2.5TRG1

Overview

AP2112M-2.5TRG1 from Diodes Incorporated is a fixed-output 2.5V, 600mA CMOS low-dropout linear regulator in SO-8 package with enable control, ±1.5% output accuracy, 250mV typical dropout at full load, and auto-discharge function (60Ω pull-down to GND when disabled). It delivers stable power for core logic rails in space-constrained industrial and consumer systems requiring fast transient response and low noise.

For engineers reviewing the AP2112M-2.5TRG1 datasheet, AP2112M-2.5TRG1 pinout, AP2112M-2.5TRG1 application, or AP2112M-2.5TRG1 equivalent, key selection criteria include dropout voltage at 600mA, ±1.5% output tolerance over temperature, EN logic thresholds (0–0.4V low, 1.5–6.0V high), thermal shutdown at +160°C, and compatibility with 1.0µF ceramic input/output capacitors.

Technical Context

The AP2112M-2.5TRG1 implements a CMOS-based LDO architecture with internal reference, error amplifier, and pass transistor, optimized for low quiescent current (55µA typ.) and fast loop response to line/load transients. Its foldback short-circuit protection limits output current to 50mA during fault conditions.

It features an integrated EN pin with 3.0MΩ internal pull-down resistor and active-high enable logic, plus an auto-discharge circuit that connects VOUT to GND via 60Ω when disabled-critical for controlled power sequencing in multi-rail systems.

Key Specifications

Pinout & Package

AP2112M-2.5TRG1 uses the SO-8 package (JEDEC MS-012AC, 3.9mm × 4.9mm × 1.75mm body height), with exposed thermal pad (pin 6 and 7 tied to GND) for enhanced thermal dissipation (θ_JA = 114°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1703T-2502E/MB and TLS850F2BTV50, AP2112M-2.5TRG1 uniquely balances 600mA delivery, 250mV dropout, ±1.5% accuracy, and auto-discharge in a commercial-grade SO-8 package-making it optimal for non-automotive embedded systems needing robust, sequenced multi-rail power.

Availability

AP2112M-2.5TRG1 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, USB-C power delivery controllers, network switch PHY interfaces, and medical patient monitoring sensors requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for AP2112M-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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The AP2112 product line delivers high-performance, low-noise LDO regulators targeting space-constrained applications where precision voltage regulation, fast transient response, and sequencing control are critical-especially in multi-voltage embedded systems.

FAQ

What is the minimum input voltage required for AP2112M-2.5TRG1 to maintain regulation at 600mA?

The minimum input voltage is 2.75V, derived from the 2.5V nominal output plus 250mV typical dropout voltage at 600mA load. The datasheet specifies a recommended operating VIN range of 2.5V to 6.0V, but regulation is only guaranteed above VOUT + VDROP. At elevated temperatures or worst-case process corners, VDROP may reach 400mV, so 3.0V input is advised for margin.

Can AP2112M-2.5TRG1 be used with a 1.0µF aluminum electrolytic output capacitor?

Yes-the datasheet explicitly states stability with 1.0µF aluminum electrolytic, ceramic, or tantalum capacitors. However, aluminum electrolytics exhibit higher ESR and temperature drift than X7R ceramics; for best load regulation (±0.2%/A) and transient response, a 1.0µF X7R/X5R ceramic capacitor is preferred, especially in wide-temperature applications.

How does the auto-discharge function behave during enable/disable transitions?

When EN is pulled low, the internal 60Ω switch connects VOUT directly to GND, discharging the output capacitor rapidly (τ ≈ R×C). For a 1.0µF capacitor, discharge time to 10% of VOUT is under 150µs. When EN returns high, the regulator starts up in ~20µs with no shoot-through or reverse current, as confirmed by the functional block diagram and transient test waveforms in the datasheet.

Is the SO-8 package of AP2112M-2.5TRG1 thermally enhanced, and how should the thermal pad be handled?

Yes-pins 6 and 7 are GND-connected thermal pads, not signal pins. To achieve the specified θ_JA of 114°C/W, these pads must be soldered to a minimum 100mm² copper pour on the PCB using at least 9 thermal vias (0.3mm diameter, spaced ≤1mm apart) to inner-layer ground planes. Omitting this compromises thermal performance and risks thermal shutdown at >300mA continuous load.