Diodes Incorporated AP1117D50L-13

Overview

AP1117D50L-13 from Diodes Incorporated is a 1A low-dropout linear voltage regulator with fixed 5.0V output, TO252 (DPAK) surface-mount package, 1.4V max dropout at 1A, ±2% output voltage accuracy, and integrated thermal shutdown and current limiting. It delivers stable 5V supply for PC peripherals, VGA cards, and 3.3V logic bus termination under 6.5–12V input.

For engineers reviewing the AP1117D50L-13 datasheet, AP1117D50L-13 pinout, AP1117D50L-13 application, or AP1117D50L-13 equivalent, this page provides verified technical context, validated pin functions, real-world application constraints, and confirmed alternative options for industrial-grade 5V LDO replacement.

Technical Context

The AP1117D50L-13 uses an internal bandgap reference (1.25V) and error amplifier to regulate output against load and line variations. Its dropout voltage remains ≤1.4V across 0°C to +125°C junction temperature with 1A load, enabling operation from as low as 6.5V input for stable 5.0V output.

It features fast transient response (≤20µs recovery from 100mA–1A load step), 70dB ripple rejection at 180Hz, and stability with 4.7µF ceramic or tantalum output capacitors (ESR 0.15–0.5Ω). Thermal shutdown activates at ~150°C junction temperature, with automatic recovery upon cooling.

Key Specifications

Pinout & Package

AP1117D50L-13 uses the TO252-3 (DPAK) surface-mount package with exposed thermal tab connected to VOUT. The package measures 6.10mm × 6.58mm × 2.29mm and is RoHS-compliant and halogen-free ("Green").

Key Features

Applications

Equivalent & Alternatives

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

Compared with AMS1117-5.0, AP1117D50L-13 offers validated industrial temperature range (-40°C to +125°C) and tighter thermal shutdown hysteresis; compared with MIC29302-5.0WT, it provides optimal footprint and cost for 1A 5V applications without over-engineering.

Availability

AP1117D50L-13 is available at Aetrix Electronics and suitable for PC peripheral design, industrial communication modules, VGA card manufacturing, and embedded controller power rails requiring stable component supply across commercial and industrial temperature grades.

Supply support for AP1117D50L-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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions, with emphasis on power management, signal integrity, and protection devices.

The AP1117 series belongs to Diodes' precision linear regulator product line, engineered specifically for high-reliability, low-noise, and thermally robust 1A fixed/flexible voltage regulation in computing, industrial, and communications infrastructure.

FAQ

What is the minimum input voltage required for AP1117D50L-13 to maintain regulation at full 1A load?

The device requires VIN ≥ VOUT + dropout voltage. With 5.0V output and maximum 1.4V dropout at 1A and +125°C, the minimum input is 6.4V. At room temperature, dropout drops to ~1.2V, allowing 6.2V minimum-but design must accommodate worst-case 6.4V to ensure regulation across temperature and load extremes.

Can AP1117D50L-13 be used with ceramic output capacitors, and what ESR range is acceptable?

Yes-it is explicitly qualified for stability with 4.7µF X7R ceramic capacitors. The datasheet specifies output capacitor ESR must be between 0.15Ω and 0.5Ω. Y5V dielectrics are prohibited due to capacitance drift; X7R ensures stable performance across temperature and bias.

How does the thermal tab connection affect PCB layout for AP1117D50L-13?

The TO252 thermal tab is internally connected to VOUT, so the copper pour it attaches to must be routed as part of the 5V output net-not ground. A minimum 5mm × 5mm 2oz copper pad with multiple thermal vias to inner layers is required to achieve the rated θJA of 73°C/W and prevent thermal shutdown under continuous 1A load.

Is AP1117D50L-13 compatible with existing AP1117-5.0 footprints using different packages?

No-AP1117D50L-13 uses TO252-3 (DPAK), while other variants use SOT223, TO220-3, or SOT89-3. Pinouts differ: TO252 has VIN-VOUT-GND in left-to-right order with VOUT tab, whereas SOT223 is VIN-VOUT-GND top-view and TO220 is VIN-VOUT-GND front-view. Mechanical and thermal pad layouts are not interchangeable.