Diodes Incorporated AZ1117CH-5.0TRG1

Overview

AZ1117CH-5.0TRG1 from Diodes Incorporated is a fixed-output 5.0V low-dropout linear regulator in SOT223 package, delivering up to 1.35A typical current with ±1% output voltage accuracy, 1.3V dropout at 0.8A, and 70dB PSRR at 120Hz - used for stable local regulation in USB peripherals and PC motherboard power rails.

For engineers reviewing the AZ1117CH-5.0TRG1 datasheet, AZ1117CH-5.0TRG1 pinout, AZ1117CH-5.0TRG1 application, or AZ1117CH-5.0TRG1 equivalent, key selection criteria include dropout voltage under load, thermal shutdown threshold (+160°C), compatibility with low-ESR ceramic capacitors (≤20Ω), minimum 10µF output capacitance, and quiescent current ≤6mA.

Technical Context

The AZ1117CH-5.0TRG1 integrates a trimmed bandgap reference and on-chip thermal shutdown circuitry, operating across -20°C to +125°C junction temperature range. Its internal current-limit protection activates at 1.35A typical, and it maintains regulation with input-to-output differential as low as 1.3V at full load.

Designed for fixed-voltage operation, the device eliminates external feedback resistors and supports direct replacement of legacy 78xx regulators where low noise (0.003% RMS output noise) and high PSRR are required. It requires no external compensation and is stable with ceramic output capacitors ≥10µF and ESR <20Ω.

Key Specifications

Pinout & Package

Package: SOT223 (3-pin, surface-mount, exposed thermal pad). Pin 1 = INPUT, Pin 2 = OUTPUT, Pin 3 = GND. The exposed pad (Pin 4, thermally connected to GND internally) must be soldered to PCB copper for thermal performance (θJA = 125°C/W without heatsink).

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 TLV1117-50CDCYR, the AZ1117CH-5.0TRG1 balances 1.35A capability, ±1% accuracy, and SOT223 thermal performance - making it optimal for mid-power USB and motherboard auxiliary rails where size, noise, and cost are jointly constrained.

Availability

AZ1117CH-5.0TRG1 is available at Aetrix Electronics and suitable for USB devices, add-on cards, and PC motherboard designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AZ1117CH-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 semiconductor company specializing in discrete, analog, and mixed-signal ICs, with emphasis on power management, signal integrity, and protection solutions.

The AZ1117C series targets cost-sensitive, space-constrained applications needing reliable low-dropout regulation - particularly in computing, consumer, and industrial power subsystems where thermal resilience and ceramic capacitor compatibility are essential.

FAQ

What is the minimum input voltage required for stable 5.0V output at 1.0A?

The AZ1117CH-5.0TRG1 requires VIN ≥ VOUT + VDROP. At 1.0A, typical dropout is 1.35V (per datasheet curves), so minimum input is 6.35V. Absolute maximum input is 15V per recommended operating conditions; exceeding this risks damage.

Can the AZ1117CH-5.0TRG1 be used with a 4.7µF output capacitor?

No. The datasheet mandates ≥10µF output capacitance with ESR <20Ω for stability. Using 4.7µF violates the minimum requirement and may cause oscillation or poor transient response. A 10µF X5R/X7R ceramic capacitor is the verified minimum.

Is the exposed thermal pad on the SOT223 package electrically connected?

Yes - the exposed pad is internally connected to Pin 3 (GND). It must be soldered to a PCB GND plane with ≥4 thermal vias (0.3mm diameter) to achieve θJA = 125°C/W. Leaving it floating degrades thermal performance and risks thermal shutdown.

Does the AZ1117CH-5.0TRG1 support automotive qualification?

The standard AZ1117CH-5.0TRG1 is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., AZ1117CH-5.0TRG1-A) with PPAP documentation, IATF 16949 manufacturing, and extended temperature screening - contact Diodes sales for part number and qualification status.