Diodes Incorporated AP1117E25G-13

Overview

AP1117E25G-13 from Diodes Incorporated is a 1A low-dropout linear regulator in fixed 2.5V output mode, housed in a SOT223 package. It delivers stable voltage regulation with ≤1.4V dropout at full load, supports 6.4–18V input range, and operates across –40°C to +125°C junction temperature-designed for VGA cards, PC peripherals, and 2.5V logic supply in space-constrained industrial systems.

For engineers reviewing the AP1117E25G-13 datasheet, AP1117E25G-13 pinout, AP1117E25G-13 application, or AP1117E25G-13 equivalent, key selection criteria include guaranteed dropout voltage at 1A load, thermal shutdown behavior, output capacitor ESR requirements (≤0.5Ω), and SOT223 thermal resistance (θJA = 107°C/W on standard FR-4).

Technical Context

The AP1117E25G-13 integrates a precision bandgap reference (1.25V ±2.5%), current-limit protection (≥1.1A), and thermal shutdown activated at ~150°C. Its internal error amplifier compares feedback from a fixed resistor network to maintain 2.5V output within ±2% over line, load, and temperature.

Unlike adjustable variants, this fixed-output version eliminates external resistors-simplifying layout while retaining fast transient response (<100µs recovery) and 70dB ripple rejection at 180Hz. Stability is ensured with ≥4.7µF ceramic output capacitance (X7R, ESR ≤0.5Ω) placed within 10mm of the device.

Key Specifications

Pinout & Package

SOT223 package: surface-mount, thermally enhanced 3-pin outline with exposed tab electrically connected to VOUT for improved heat dissipation. Pad layout requires ≥5mm × 5mm 2oz copper thermal pad per Diodes Inc. AP02001 guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AP1117E25G-13, AP1117E33G-13 offers identical robustness at 3.3V but cannot replace 2.5V logic rails, while TLV1117-25CDCYR trades output current and package compatibility for lower dropout-requiring thermal redesign for equivalent 1A performance.

Availability

AP1117E25G-13 is available at Aetrix Electronics and suitable for VGA graphics cards, industrial PC peripherals, consumer set-top boxes, and network interface modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AP1117E25G-13 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 communications markets.

The AP1117 series targets cost-sensitive, space-constrained applications needing robust fixed-output LDOs with industrial temperature grading and simplified bill-of-materials-emphasizing drop-in replacement capability and thermal resilience over ultra-low quiescent current.

FAQ

Is AP1117E25G-13 pin-compatible with other '1117-family regulators?

Yes-AP1117E25G-13 uses the standard SOT223 pinout (VIN–VOUT–GND) and matches mechanical and electrical footprints of industry-standard 1117 regulators including MIC5205-2.5 and LD1117S25. No PCB redesign is needed for drop-in replacement, though thermal performance may vary based on manufacturer-specific θJA values.

What output capacitor types satisfy stability requirements?

AP1117E25G-13 requires ≥4.7µF ceramic (X7R dielectric, ESR ≤0.5Ω) or solid tantalum capacitors placed within 10mm of the VOUT pin. Aluminum electrolytics are permitted only with ≥47µF value and parallel 1µF MLCC; Y5V ceramics are prohibited due to capacitance drift under bias.

Does AP1117E25G-13 support operation below 0°C?

Yes-the AP1117I variant (industrial grade) in this part number is rated for –40°C to +125°C junction temperature. For sub-zero ambient operation, Diodes Inc. recommends 22µF input/output capacitors to maintain ESR within stable range and prevent cold-start regulation loss.

How does thermal shutdown behave during overload?

When junction temperature reaches ~150°C, the internal thermal limiter disables the pass transistor, dropping VOUT to near zero. Output resumes automatically once die cools below ~135°C hysteresis threshold. This cycle repeats continuously under sustained overload, protecting against permanent damage without external intervention.