Diodes Incorporated AP2113MTR-G1

Overview

AP2113MTR-G1 from Diodes Incorporated is a 600mA low-dropout linear regulator optimized as a 1.6× adjustable DC fan driver with full-speed mode control via FON pin. It delivers 150mV dropout at 600mA in full-speed mode, consumes 70μA quiescent current, and supports VSET-referenced output (1.6× ±3%) for notebook fan speed regulation in battery-powered systems.

For engineers reviewing the AP2113MTR-G1 datasheet, AP2113MTR-G1 pinout, AP2113MTR-G1 application, or AP2113MTR-G1 equivalent, this page provides verified pin functions, thermal shutdown behavior, fold-back short-circuit protection (50mA), package-specific thermal resistance (θ_JA = 144°C/W for SOIC-8), and direct replacement guidance to AP2112.

Technical Context

The AP2113 operates in two distinct modes: adjustable mode (FON = high) where V_OUT = 1.6 × V_SET (min V_SET = 1.0V), and full-speed mode (FON = low) where V_OUT ≈ V_IN – V_DROP. Its internal fold-back current limiting activates at 50mA during output short, reducing power dissipation during fault conditions.

It integrates over-temperature shutdown (T_OTSD = 165°C, hysteresis = 25°C), supports 1.0μF ceramic/tantalum/aluminum electrolytic output capacitors, and maintains stable regulation across –40°C to +85°C ambient temperature with <0.1%/V line regulation and <1%/A load regulation.

Key Specifications

Pinout & Package

AP2113MTR-G1 is supplied in SOIC-8 (M package), with θ_JA = 144°C/W and footprint compatible with JEDEC MS-012AC. The exposed pad is not electrically connected; thermal performance relies on PCB copper area under pins 5–8 (GND).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar linear fan driver applications.

Compared with AP2112MTR-G1, the AP2113 offers identical functionality but with slightly looser V_OUT/V_SET tolerance and higher quiescent current; RT9193-33GB lacks both adjustability and fault protection, making it unsuitable for variable-speed or safety-critical fan applications.

Availability

AP2113MTR-G1 is available at Aetrix Electronics and suitable for notebook computer fan drivers, motherboard thermal management, and peripheral card cooling requiring stable component supply despite its obsolete status.

Supply support for AP2113MTR-G1 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 power management, signal integrity, and protection solutions for consumer, computing, and industrial markets.

The AP2113 belongs to Diodes' linear regulator product line designed specifically for DC fan control in space-constrained, thermally sensitive applications - emphasizing low dropout, low IQ, and integrated fault protection.

FAQ

Is AP2113MTR-G1 still in production?

No - Diodes Incorporated has officially discontinued the AP2113 series. The AP2112MTR-G1 is the designated successor with identical pinout, enhanced specifications, and active production status. Aetrix Electronics maintains limited legacy stock of AP2113MTR-G1 for existing design continuity, subject to availability.

Can AP2113 operate with a 3.3V input supply?

Yes - the AP2113 supports input voltages from 2.5V to 5.5V. With a 3.3V input and full-speed mode (FON = low), it delivers up to 3.15V output (3.3V – 150mV dropout) at 600mA. In adjustable mode, V_SET must be ≥1.0V and ≤2.06V to ensure V_OUT ≤ 3.3V.

What capacitor types are validated for AP2113 stability?

The AP2113 is characterized and guaranteed stable with 1.0μF ceramic, tantalum, or aluminum electrolytic capacitors on the output. No ESR range restrictions apply - unlike many LDOs, it does not require minimum ESR for phase margin, simplifying BOM selection and layout.

How does fold-back current limiting behave during a short circuit?

When V_OUT collapses to 0V, the AP2113 reduces output current to 50mA (typical) and holds it there until the fault clears or thermal shutdown activates. This fold-back action limits power dissipation to ~150mW (3V × 50mA), preventing destructive heating during sustained shorts.