Diodes Incorporated AZ1117ID-1.2TRG1

Overview

AZ1117ID-1.2TRG1 from Diodes Incorporated is a fixed-output 1.2 V low-dropout linear regulator in TO252-2 package, delivering up to 1.35 A output current with ±1.2% output voltage accuracy (1.176 V to 1.224 V), 1.3 V typical dropout at 0.8 A, and integrated thermal shutdown. It serves as a primary post-regulation supply for USB peripherals and embedded microcontroller core rails where low-noise, stable 1.2 V bias is required.

For engineers reviewing the AZ1117ID-1.2TRG1 datasheet, AZ1117ID-1.2TRG1 pinout, AZ1117ID-1.2TRG1 application, or AZ1117ID-1.2TRG1 equivalent, key selection criteria include dropout voltage at 800 mA load, thermal resistance (θ_JA = 100 °C/W without heatsink), PSRR of 70 dB at 120 Hz, RMS output noise of 0.003% of V_OUT, and compatibility with ceramic capacitors ≥10 µF and ESR <20 Ω.

Technical Context

The AZ1117ID-1.2TRG1 implements a trimmed bandgap reference and internal current-limit circuitry to maintain regulation under transient load steps. Its thermal protection activates at +160 °C junction temperature with +16 °C hysteresis, enabling safe operation across -40 °C to +125 °C ambient.

Designed for low-voltage systems, it achieves 70 dB power supply rejection at 120 Hz with 3 V headroom and 300 mA load, while maintaining ≤15 mV load regulation over 1–1000 mA output range and ≤6 mV line regulation across input variations.

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 low-dropout linear regulator applications.

Compared with MCP1700T-1202E/MB and TLV1117-12CDCYR, the AZ1117ID-1.2TRG1 uniquely balances 1.35 A capability, TO252-2 thermal performance (θ_JA = 100 °C/W), and industrial temperature rating - making it optimal for compact, high-reliability 1.2 V power delivery where both current and thermal margin matter.

Availability

AZ1117ID-1.2TRG1 is available at Aetrix Electronics and suitable for USB peripheral power, embedded sensor node bias, industrial control module supplies, and FPGA core rail regulation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AZ1117ID-1.2TRG1 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 AZ1117I series is part of Diodes' industrial-grade LDO portfolio, designed specifically for applications demanding wide temperature operation (-40 °C to +125 °C), low dropout, and robust thermal protection in space-constrained PCB layouts.

FAQ

What is the minimum input voltage required for stable 1.2 V output at 1 A load?

The AZ1117ID-1.2TRG1 requires a minimum input voltage of 2.5 V to maintain regulation at 1 A load, based on its 1.3 V typical dropout voltage (max 1.4 V) specified for TO252-2 at 0.8 A. At 1 A, measured dropout remains ≤1.4 V, so VIN ≥ 2.6 V ensures margin; 2.7 V is recommended for production designs with tolerance stack-up.

Can this device replace the AZ1117IH-1.2TRG1 in an existing SOT223 layout?

No - AZ1117ID-1.2TRG1 uses TO252-2 packaging with different footprint, thermal pad, and pin spacing versus SOT223. Direct replacement requires PCB redesign: TO252-2 has 6.0 mm × 6.2 mm body vs. SOT223's 6.7 mm × 3.7 mm, and thermal pad dimensions differ significantly. Electrical specs are identical, but mechanical incompatibility prevents drop-in substitution.

Is an external capacitor required on the ADJ/GND pin for the fixed 1.2 V version?

No - the AZ1117ID-1.2TRG1 is a fixed-output variant; the ADJ/GND pin is internally connected to ground and requires no external components. Only the adjustable (ADJ) version needs two external resistors to set V_OUT. For fixed versions, GND is the reference return, and no resistor network or capacitor is needed on that terminal.

Does this regulator support ceramic output capacitors with zero ESR?

Yes - the AZ1117ID-1.2TRG1 is explicitly characterized for stability with low-ESR ceramic capacitors ≥10 µF, including X5R/X7R types. The datasheet confirms stability down to ESR values as low as 1 mΩ, provided the capacitor's effective series inductance (ESL) remains within typical ceramic limits. No series resistor is required for phase compensation.