Diodes Incorporated AZ1084CS-1.5TRE1

Overview

AZ1084CS-1.5TRE1 from Diodes Incorporated is a fixed-output 1.5V, 5A low-dropout linear regulator in TO252-2 (3) package with 1.35V typical dropout at full load, on-chip thermal limiting, and ±1% output voltage accuracy over temperature and load. It delivers stable post-regulation for microprocessor core supplies and battery charging circuits where low-noise, high-current DC/DC sequencing is required.

For engineers reviewing the AZ1084CS-1.5TRE1 datasheet, AZ1084CS-1.5TRE1 pinout, AZ1084CS-1.5TRE1 application, or AZ1084CS-1.5TRE1 equivalent, key selection criteria include dropout voltage at 5A, thermal shutdown behavior under sustained overload, compatibility with ceramic output capacitors, and minimum load current requirements in low-power states.

Technical Context

The AZ1084CS-1.5TRE1 implements a trimmed bandgap reference with internal resistor divider to fix VOUT at 1.5V, eliminating external feedback components. Its current-limiting circuit activates at 6.5A and integrates with thermal foldback to prevent junction overheating beyond +125°C.

Designed for high-current linear regulation, it supports input voltages up to 12V and maintains load regulation of ≤15mV from 0–5A while operating with only 10μF ceramic output capacitance-no electrolytic or tantalum required.

Key Specifications

Pinout & Package

Package: TO252-2 (3), surface-mount, thermally enhanced DPAK variant with exposed drain pad (pin 2) for PCB heat sinking. Pin 1 = INPUT, Pin 2 = OUTPUT, Pin 3 = GND (not ADJ - fixed version).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output LDO applications.

Compared with AP1084K-15L-U and TLV1117-15CDCYR, the AZ1084CS-1.5TRE1 uniquely combines 5A capability, 1.35V dropout, and thermal foldback in a single TO252-2 (3) footprint - enabling compact, thermally robust designs where high-current linearity and safety-critical thermal behavior are jointly required.

Availability

AZ1084CS-1.5TRE1 is available at Aetrix Electronics and suitable for microprocessor core supplies, battery charger reference rails, and industrial FPGA I/O banks requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for AZ1084CS-1.5TRE1 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 across Asia, Europe, and the U.S., and manufacturing in IATF 16949-certified facilities.

The AZ1084C series belongs to Diodes' high-current LDO product line, engineered specifically for post-regulation in power-constrained systems where low dropout, thermal resilience, and ceramic capacitor compatibility are mandatory.

FAQ

What is the minimum input voltage required for stable 1.5V output at 5A?

The AZ1084CS-1.5TRE1 requires VIN ≥ 2.85V to maintain regulation at 5A, based on its 1.35V typical dropout voltage. At worst-case 1.5V dropout (per datasheet limit), VIN must be ≥ 3.0V. Input below this threshold causes output collapse and possible thermal stress due to excessive power dissipation.

Can this device operate without an output capacitor?

No. The AZ1084CS-1.5TRE1 requires a minimum 10µF ceramic output capacitor (X5R/X7R) placed within 5mm of pins 2 and 3 for stability. Omitting it causes oscillation and potential damage; tantalum or electrolytic caps are not recommended due to ESR sensitivity and aging effects.

Is the TO252-2 (3) package thermally adequate for 5A continuous operation?

Yes - when mounted on ≥250mm² of 2oz copper with 4 thermal vias (0.3mm diameter) connecting pin 2 to inner ground planes, the TO252-2 (3) achieves θJA ≈ 42°C/W, limiting junction rise to ~125°C at 5A with 25°C ambient. Derating is required above 60°C ambient or with reduced copper area.

Does this part support reverse-voltage or reverse-current protection?

No. The AZ1084CS-1.5TRE1 lacks integrated reverse-battery or reverse-current blocking. If input can fall below output (e.g., during hot-swap or backup battery switchover), an external Schottky diode between IN and OUT is required to prevent backfeed and potential damage to the pass transistor.