Diodes Incorporated AZ1117EH-5.0TRG1

Overview

AZ1117EH-5.0TRG1 from Diodes Incorporated is a 1.0A fixed-output 5.0V low-dropout linear regulator in SOT-223 package, featuring ±1% output voltage accuracy, 1.1V typical dropout at 1A load, and integrated thermal shutdown and current limit protection. It delivers stable local regulation for power-sensitive subsystems in LCD monitors, notebook motherboards, and set-top boxes.

For engineers reviewing the AZ1117EH-5.0TRG1 datasheet, AZ1117EH-5.0TRG1 pinout, AZ1117EH-5.0TRG1 application, or AZ1117EH-5.0TRG1 equivalent, key selection criteria include dropout voltage at full load, output accuracy over temperature, PSRR at 100Hz–100kHz, thermal resistance (θ_JA = 65°C/W), and compatibility with low-ESR ceramic capacitors ≥1.0µF.

Technical Context

The AZ1117EH-5.0TRG1 uses a trimmed bandgap reference to maintain output accuracy within ±1% across –40°C to +125°C junction temperature. Its internal current limit (~1.3A typ.) and thermal shutdown trigger at ~170°C with 20°C hysteresis ensure safe operation under overload or high ambient conditions.

Stability is guaranteed with output capacitors having ESR < 1.5Ω and minimum 1.0µF capacitance; it rejects input ripple with 70dB PSRR at 100Hz and maintains 0.001%/V line regulation at 30mA load - critical for noise-sensitive analog and mixed-signal rails.

Key Specifications

Pinout & Package

Supplied in industry-standard SOT-223 package with exposed thermal pad (pin 2 connected to die attach paddle). Pin 1 is ADJ/GND (ground for fixed versions), pin 2 is OUTPUT, pin 3 is INPUT.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AP1117E50G-13 and TLV1117-50CDCYR, the AZ1117EH-5.0TRG1 offers superior output accuracy and full 1.0A continuous rating at lower dropout, making it optimal for thermally constrained, noise-sensitive 5.0V applications demanding reliability across industrial temperature ranges.

Availability

AZ1117EH-5.0TRG1 is available at Aetrix Electronics and suitable for TV power management, notebook motherboard rails, set-top box AV processing, and industrial display controllers requiring stable component supply and long-term manufacturability support.

Supply support for AZ1117EH-5.0TRG1 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 AZ1117E series targets cost-effective, thermally robust linear regulation in space-constrained applications - designed specifically for legacy and new designs needing proven 1.0A LDO performance with minimal external components.

FAQ

What is the minimum input voltage required for AZ1117EH-5.0TRG1 to regulate 5.0V at 1.0A?

The minimum input voltage is 6.1V, calculated as V_OUT + V_DROP = 5.0V + 1.1V (typical dropout at 1.0A). The datasheet specifies absolute maximum VIN of 16V and recommended operating VIN up to 13V. Operation below 6.1V results in dropout mode and unregulated output.

Can AZ1117EH-5.0TRG1 be used with ceramic output capacitors smaller than 1.0µF?

No - the datasheet mandates a minimum 1.0µF ceramic output capacitor with ESR < 1.5Ω for stability. Using smaller values risks oscillation or poor transient response. A 0.68µF capacitor may be placed in parallel only if positioned ≥5mm from the OUTPUT pin, and never alone.

Does AZ1117EH-5.0TRG1 require an input capacitor, and what type is recommended?

Yes - a minimum 1.0µF low-ESR ceramic capacitor is required on the INPUT pin to suppress high-frequency noise and prevent instability. Tantalum or aluminum electrolytics are not recommended due to higher ESR and aging effects; X5R/X7R MLCCs are preferred.

How does the thermal shutdown behavior of AZ1117EH-5.0TRG1 affect system reliability?

Thermal shutdown activates at ~170°C junction temperature with 20°C hysteresis, allowing automatic recovery once temperature drops to ~150°C. This protects against permanent damage during sustained overload or poor heatsinking, enabling graceful degradation rather than catastrophic failure in enclosed systems.