Diodes Incorporated AZ1117S-5.0TRE1

Overview

AZ1117S-5.0TRE1 from Diodes Incorporated is a fixed-output 5.0V, 1A low-dropout linear regulator in TO263 package, featuring 1.15V dropout at full load, ±1% output voltage accuracy over temperature, and integrated thermal shutdown and current limiting. It delivers stable local regulation for microcontroller I/O rails, FPGA auxiliary supplies, and embedded system peripherals where input-to-output differential is constrained.

For engineers reviewing the AZ1117S-5.0TRE1 datasheet, AZ1117S-5.0TRE1 pinout, AZ1117S-5.0TRE1 application, or AZ1117S-5.0TRE1 equivalent, key selection criteria include dropout voltage at 1A, thermal resistance (θJC = 10°C/W), output voltage tolerance across -40°C to +125°C, and compatibility with 22µF tantalum or ceramic output capacitors.

Technical Context

The AZ1117S-5.0TRE1 uses a trimmed bandgap reference and PNP pass transistor architecture to achieve 1.15V dropout at 1A while maintaining ±1% output accuracy. Its internal current limit is factory-trimmed to 1.25–1.35A and thermal shutdown activates at +150°C with +25°C hysteresis.

It operates across -40°C to +125°C junction temperature, supports input voltages up to 15V, and achieves 60–75dB ripple rejection at 120Hz with 22µF output capacitance - enabling clean power delivery in noise-sensitive analog and mixed-signal subsystems.

Key Specifications

Pinout & Package

TO263-3 (D²PAK) surface-mount package with exposed thermal pad; pin 1 = INPUT, pin 2 = OUTPUT, pin 3 = GND. The exposed pad must be soldered to PCB copper for thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MIC29302WU-5.0 and LD1085V50, the AZ1117S-5.0TRE1 offers the best balance of dropout voltage (1.15V), accuracy (±1%), and thermal performance (θJC = 10°C/W) in a standard TO263 footprint - making it optimal for space-constrained industrial and computing applications demanding reliable 1A 5V regulation.

Availability

AZ1117S-5.0TRE1 is available at Aetrix Electronics and suitable for PC motherboard VRMs, LCD monitor logic supplies, FPGA I/O banks, and industrial PLC digital I/O modules requiring stable component supply with full industrial temperature support.

Supply support for AZ1117S-5.0TRE1 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 AZ1117 series targets cost-sensitive, high-volume embedded power applications requiring robust fixed- and adjustable-output LDO regulation with integrated protection - particularly in motherboards, displays, and network infrastructure equipment.

FAQ

What is the minimum input voltage required for stable 5.0V output at 1A load?

The AZ1117S-5.0TRE1 requires a minimum input voltage of 6.15V to maintain regulation at 1A, based on its 1.15V dropout specification. Input voltage must remain ≥6.5V per recommended operating conditions to ensure margin against line and load transients. Below this threshold, output voltage drops linearly with input.

Can AZ1117S-5.0TRE1 be used with ceramic output capacitors?

Yes - the AZ1117S-5.0TRE1 is stable with ceramic output capacitors ≥22µF, provided ESR is between 0.1Ω and 10Ω. Unlike older LDOs, it does not require high-ESR tantalum capacitors. Use X5R/X7R dielectrics rated for ≥10V to ensure capacitance retention under DC bias.

How does thermal shutdown behave during sustained overload?

When junction temperature reaches +150°C, the AZ1117S-5.0TRE1 enters thermal shutdown, disabling the pass transistor until temperature falls by +25°C hysteresis (to ~+125°C). This cycle repeats autonomously - protecting the device without external intervention, though repeated cycling indicates inadequate heatsinking or excessive power dissipation.

Is there a recommended input capacitor value and type?

A minimum 10µF aluminum or tantalum capacitor is recommended at the INPUT pin, placed within 5mm of the device. For improved high-frequency noise rejection, add a 100nF ceramic capacitor in parallel. Avoid undersized input capacitance, as it may cause instability during fast load transients or induce oscillation under light loads.