Diodes Incorporated AZ1117D-1.8TRE1

Overview

AZ1117D-1.8TRE1 from Diodes Incorporated is a fixed-output 1.8V, 1A low-dropout linear regulator in TO252-2 (3) package, featuring 1.15V dropout at full load, ±1% output voltage accuracy over temperature, and integrated thermal shutdown and current limiting. It delivers stable power to core logic rails in space-constrained industrial and computing applications requiring precise low-voltage regulation.

For engineers reviewing the AZ1117D-1.8TRE1 datasheet, AZ1117D-1.8TRE1 pinout, AZ1117D-1.8TRE1 application, or AZ1117D-1.8TRE1 equivalent, key selection criteria include dropout voltage at 1A, thermal resistance (θ_JA = 100°C/W), output voltage tolerance (1.782–1.854V), minimum input voltage margin (≥3.2V), and TO252-2 (3) thermal pad layout compatibility.

Technical Context

The AZ1117D-1.8TRE1 uses a trimmed bandgap reference and PNP pass transistor architecture to achieve 1% initial output accuracy and <0.5% temperature stability across –40°C to +125°C. Its internal current limit is factory-trimmed to 1.25–1.35A, ensuring consistent short-circuit protection without external components.

Thermal shutdown activates at +150°C junction temperature with +25°C hysteresis, and ripple rejection reaches 60–75dB at 120Hz with 22µF tantalum output capacitance. The device operates with input voltages up to 15V and requires no minimum load for fixed-output variants.

Key Specifications

Pinout & Package

TO252-2 (3) package with exposed thermal pad (pin 2 is GND and thermally connected to pad); compact surface-mount footprint optimized for PCB heat dissipation without heatsink.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-1802E/MB and TLV1117-18CDCYR, AZ1117D-1.8TRE1 uniquely balances 1A capability, 1.15V dropout, ±1% accuracy, and TO252-2 (3) thermal performance-making it optimal for industrial and computing loads where input headroom and precision are constrained.

Availability

AZ1117D-1.8TRE1 is available at Aetrix Electronics and suitable for industrial PLCs, embedded GPU power, network interface cards, and automotive infotainment systems requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for AZ1117D-1.8TRE1 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 emphasis on high-reliability power management and signal integrity solutions.

AZ1117D-1.8TRE1 belongs to the AZ1117 series of low-dropout linear regulators designed for cost-sensitive, space-constrained industrial and computing applications demanding precision voltage regulation without complex external circuitry.

FAQ

What is the minimum input voltage required for AZ1117D-1.8TRE1 to maintain regulation at 1A?

The minimum input voltage is 3.2V, calculated as V_OUT + V_DROP(max) = 1.8V + 1.15V = 2.95V, with 0.25V margin for line regulation and transient headroom per datasheet operating conditions (3.2V ≤ V_IN ≤ 10V at 1A). Below 3.2V, output voltage drops proportionally.

Can AZ1117D-1.8TRE1 be used with ceramic output capacitors?

Yes-AZ1117D-1.8TRE1 is stable with ceramic output capacitors ≥22µF and ESR < 1Ω. The datasheet confirms compatibility with low-ESR types; a 22µF X5R 0805 ceramic capacitor meets both capacitance and ESR requirements while improving transient response over tantalum alternatives.

How does the thermal shutdown hysteresis affect system recovery?

Thermal shutdown activates at +150°C junction temperature and resets at +125°C due to +25°C hysteresis. This prevents rapid cycling during overload; after shutdown, the device remains off until die temperature falls by 25°C, allowing safe cooldown before resuming regulation without external reset circuitry.

Is AZ1117D-1.8TRE1 pin-compatible with other AZ1117 variants in TO252-2 (3) package?

Yes-all AZ1117 fixed-output versions (1.2V–5.0V) and adjustable variants in TO252-2 (3) share identical pinout (INPUT–OUTPUT–GND) and footprint. Voltage selection is internal; no external resistor changes are needed when substituting between fixed-output part numbers in the same package.