Diodes Incorporated AZ1084CD-5.0TRG1

Overview

AZ1084CD-5.0TRG1 from Diodes Incorporated is a fixed-output 5.0V, 5A low-dropout linear regulator in TO252-2 (3)/(4)/(5) package, featuring 1.35V typical dropout at full load, on-chip thermal limiting, and ±1% output voltage accuracy over 0°C to +125°C. It delivers stable post-regulation for switching supplies and powers microprocessor cores in desktop PCs and embedded systems.

For engineers reviewing the AZ1084CD-5.0TRG1 datasheet, AZ1084CD-5.0TRG1 pinout, AZ1084CD-5.0TRG1 application, or AZ1084CD-5.0TRG1 equivalent, key selection criteria include dropout voltage at 5A, thermal shutdown behavior, compatibility with low-ESR ceramic output capacitors, and GND-referenced fixed-output configuration without external resistors.

Technical Context

The AZ1084CD-5.0TRG1 implements a trimmed bandgap reference with internal resistor divider for fixed 5.0V output, eliminating external feedback components. Its current-limiting circuit triggers at 6.5A typical and integrates thermal foldback to protect against sustained overload or high ambient temperature conditions.

Designed for high-current linear regulation, it operates with input voltages up to 12V and maintains load regulation of ≤10mV across 0–5A output current. The device uses a single GND terminal (not ADJ), confirming its fixed-output architecture and simplifying PCB layout versus adjustable variants.

Key Specifications

Pinout & Package

Package: TO252-2 (3), TO252-2 (4), or TO252 (Type CJ) - surface-mount power package with exposed thermal pad for enhanced heat dissipation. Pin 2 is the large-tab output terminal, electrically connected to the die substrate for low-inductance current path.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AP7361-50SG-13 and LT1963AES8-5#TRPBF, the AZ1084CD-5.0TRG1 uniquely supports 5A continuous output in a thermally optimized TO252 package with 1.35V dropout - making it the only option among the three capable of un-derated operation in high-power linear regulation roles.

Availability

AZ1084CD-5.0TRG1 is available at Aetrix Electronics and suitable for microprocessor core supplies, battery charger post-regulators, and desktop PC peripheral rails requiring stable component supply with full 5A capability and industrial temperature support.

Supply support for AZ1084CD-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 manufacturer specializing in discrete, analog, and mixed-signal solutions for industrial, computing, and consumer markets.

The AZ1084C series targets high-current linear regulation applications where low dropout, thermal robustness, and fixed-output simplicity are prioritized over programmability - especially in cost-sensitive, high-volume power management designs.

FAQ

What is the minimum input voltage required for AZ1084CD-5.0TRG1 to regulate at full 5A?

The minimum input voltage is 6.35V, calculated from the 1.35V typical dropout voltage plus the 5.0V output. At 5A load and 25°C ambient, operation below this voltage causes dropout mode and unregulated output. Input must also stay within the 6.5V–10V range specified for load regulation testing to ensure ≤10mV deviation.

Can AZ1084CD-5.0TRG1 be used with ceramic output capacitors only?

Yes - the device is explicitly characterized for stability with ≥10µF low-ESR ceramic capacitors, as confirmed in the Typical Applications Circuit and Electrical Characteristics table. No tantalum or electrolytic capacitor is required, reducing footprint, cost, and aging-related failure risks.

Does AZ1084CD-5.0TRG1 require an external adjustment resistor network?

No - the "-5.0" suffix denotes a fixed-output version with internal resistor divider. Pin 3 is GND (not ADJ), and no external resistors are needed. This differs from the "-ADJ" variant, which uses Pin 3 as the adjust terminal and requires two external resistors to set output voltage.

How does thermal shutdown behave during sustained overload?

When junction temperature reaches +150°C, the device enters thermal shutdown, disabling output until temperature falls by ~20°C hysteresis. Recovery is automatic and does not require power cycle. During repeated cycling, average output current drops to limit average die temperature - protecting both IC and PCB.