Diodes Incorporated AZ1117ID-1.5TRG1

Overview

AZ1117ID-1.5TRG1 from Diodes Incorporated is a fixed-output 1.5 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 supports industrial temperature range (−40°C to +125°C) and is optimized for USB devices and PC motherboard power rails where low-noise, stable low-voltage bias is critical.

For engineers reviewing the AZ1117ID-1.5TRG1 datasheet, AZ1117ID-1.5TRG1 pinout, AZ1117ID-1.5TRG1 application, or AZ1117ID-1.5TRG1 equivalent, key selection criteria include dropout voltage at full load, PSRR at 120 Hz, quiescent current under no-load, thermal resistance (θ_JA = 100 °C/W), and compatibility with low-ESR ceramic capacitors (≤20 Ω).

Technical Context

The AZ1117ID-1.5TRG1 uses an internal trimmed bandgap reference and PNP pass transistor architecture to achieve tight output regulation across load (1 mA–1 A) and line (V_IN − V_OUT ≥ 1.5 V) variations. Its thermal protection activates at +160°C junction temperature with +16°C hysteresis, ensuring safe operation during sustained overload or high ambient conditions.

Designed for low-noise applications, it delivers 0.003% RMS output noise (10 Hz–10 kHz) and 70 dB PSRR at 120 Hz with 22 µF output capacitance. The device requires a minimum 10 µF ceramic output capacitor with ESR < 20 Ω and exhibits load regulation of ≤15 mV over its full operating current range.

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-1502E/MB and TLV70115DBVR, AZ1117ID-1.5TRG1 uniquely combines 1.35 A current delivery, integrated thermal protection, and industrial temperature range-making it the only viable choice for high-current, safety-critical 1.5 V regulation in USB and industrial systems.

Availability

AZ1117ID-1.5TRG1 is available at Aetrix Electronics and suitable for USB devices, PC motherboards, DVD player audio subsystems, and industrial sensor nodes requiring stable component supply with full industrial temperature support and RoHS 3 compliance.

Supply support for AZ1117ID-1.5TRG1 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 design centers in Asia, Europe, and the U.S., and manufacturing in ISO/TS 16949-certified facilities.

The AZ1117I series targets industrial and computing power management, delivering high-accuracy, thermally robust LDOs for applications demanding reliability across wide temperature extremes and high current density.

FAQ

What is the minimum input voltage required for stable 1.5 V output at 1 A load?

The AZ1117ID-1.5TRG1 requires a minimum input voltage of 2.8 V to maintain regulation at 1 A, based on its maximum dropout voltage of 1.3 V (typical 1.3 V at 0.8 A, derated to ~1.35 V at 1 A per datasheet curves). Below this, output voltage sags proportionally to (V_IN − V_DROP).

Can this LDO operate with a 10 µF X5R ceramic capacitor on the output?

Yes-AZ1117ID-1.5TRG1 is explicitly designed for low-ESR ceramic capacitors. A 10 µF X5R capacitor meets the minimum requirement and stays within the recommended ESR limit of <20 Ω. Ensure the capacitor's DC bias derating maintains ≥10 µF effective capacitance at 1.5 V.

How does thermal shutdown behave during continuous overload?

When junction temperature reaches +160°C, the device shuts down output and remains off until temperature drops by +16°C hysteresis (to ~+144°C), then resumes regulation. This cycling prevents permanent damage but reduces average output current; PCB thermal design must limit steady-state T_J below 125°C.

Is the TO252-2 package pin-compatible with other AZ1117I variants?

Yes-AZ1117ID-1.5TRG1 shares identical pinout (INPUT–OUTPUT–GND) and footprint with all TO252-2 versions of the AZ1117I family (e.g., -3.3V, -ADJ), enabling drop-in replacement across output voltages without layout changes.