Diodes Incorporated AZ1117ID-3.3TRG1

Overview

AZ1117ID-3.3TRG1 from Diodes Incorporated is a fixed-output 3.3 V low-dropout linear regulator in TO252-2 package, delivering up to 1.35 A with ±1% output voltage accuracy, 1.3 V typical dropout at 0.8 A, and integrated thermal shutdown. It serves as a primary post-regulation power supply for USB peripherals, PC motherboard auxiliary rails, and industrial embedded controllers requiring stable 3.3 V at moderate load currents.

For engineers reviewing the AZ1117ID-3.3TRG1 datasheet, AZ1117ID-3.3TRG1 pinout, AZ1117ID-3.3TRG1 application, or AZ1117ID-3.3TRG1 equivalent, key selection criteria include dropout voltage under 1.4 V at full load, PSRR of 70 dB at 120 Hz, compatibility with ceramic output capacitors ≤20 Ω ESR, and operation across –40°C to +125°C junction temperature.

Technical Context

The AZ1117ID-3.3TRG1 implements a trimmed bandgap reference and internal current-limit circuitry to maintain regulation under transient overloads. Its thermal shutdown activates at +160°C junction temperature with +16°C hysteresis, enabling safe recovery after fault conditions without external intervention.

Designed for low-noise applications, it delivers 0.003% RMS output noise (10 Hz–10 kHz) and achieves 70 dB power supply rejection at 120 Hz with 22 µF output capacitance. The device requires only a 10 µF minimum ceramic output capacitor and supports input voltages up to 15 V.

Key Specifications

Pinout & Package

Package: TO252-2 (Type CJ), surface-mount, thermally enhanced plastic package with exposed drain pad for improved heat dissipation (θ_JA = 100 °C/W without heatsink; 70 °C/W with heatsink).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-3302E/MB and TLV1117-33CDCYR, the AZ1117ID-3.3TRG1 provides 1.7× higher current delivery than the TLV1117 and 5.4× more than the MCP1700, while maintaining tighter output accuracy and superior thermal robustness for industrial environments.

Availability

AZ1117ID-3.3TRG1 is available at Aetrix Electronics and suitable for USB peripheral designs, PC motherboard auxiliary rails, and industrial sensor nodes requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.

Supply support for AZ1117ID-3.3TRG1 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 power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The AZ1117I series targets industrial-grade linear regulation needs-designed for reliability in extended temperature environments, compatibility with modern ceramic capacitors, and integration into space-constrained PCB layouts.

FAQ

What is the minimum input voltage required for stable 3.3 V output at 1 A?

The AZ1117ID-3.3TRG1 requires VIN ≥ VOUT + VDROP. At 1 A, dropout is ≤1.4 V (TO252-2), so minimum input is 4.7 V. Operation below this causes output collapse. Input must also stay within absolute maximum rating of 18 V.

Can the AZ1117ID-3.3TRG1 be used with a 10 µF X5R ceramic capacitor?

Yes-datasheet specifies compatibility with low-ESR ceramic capacitors ≥10 µF and ESR ≤20 Ω. X5R 10 µF/16 V MLCCs typically exhibit 5–15 mΩ ESR, satisfying stability requirements without additional series resistance.

Does the GND pin serve a thermal function in the TO252-2 package?

Yes-the TO252-2 package exposes the die attach pad (connected internally to Pin 3/GND) as a thermal path. PCB layout must solder this pad to a ≥100 mm² copper pour with ≥8 thermal vias to achieve specified θ_JA = 100 °C/W.

How does thermal shutdown behave during continuous overload?

When junction temperature reaches +160°C, the device shuts down output. After cooling by ≥16°C (to ≤144°C), it automatically resumes regulation. This cycle repeats if overload persists, preventing permanent damage but limiting average output current.