Diodes Incorporated AZ1117R-1.2TRG1

Overview

AZ1117R-1.2TRG1 from BCD Semiconductor Manufacturing Limited is a fixed-output 1.2 V, 1 A low-dropout linear regulator in SOT-89 package, featuring 1.15 V dropout at full load, ±2% output voltage accuracy, and integrated thermal shutdown and current limiting. It delivers stable bias for low-voltage logic rails in space-constrained embedded systems such as USB peripheral controllers and sensor interface modules.

For engineers reviewing the AZ1117R-1.2TRG1 datasheet, AZ1117R-1.2TRG1 pinout, AZ1117R-1.2TRG1 application, or AZ1117R-1.2TRG1 equivalent, this page provides verified electrical specifications, validated SOT-89 terminal mapping, confirmed thermal performance limits, and real-world use cases in industrial and consumer power management designs.

Technical Context

The AZ1117R-1.2TRG1 implements a trimmed bandgap reference with internal error amplifier and PNP pass transistor to regulate output voltage. Its feedback path is internally fixed for 1.2 V, eliminating external resistor networks required by adjustable variants.

Thermal protection activates at 150 °C junction temperature with 25 °C hysteresis, while current limiting is factory-trimmed to 1.25–1.35 A under VIN–VOUT = 2 V conditions. The device operates across –40 °C to +125 °C junction temperature range without derating up to 1 A at ambient ≤ 65 °C with standard PCB copper area.

Key Specifications

Pinout & Package

The AZ1117R-1.2TRG1 is housed in a 3-pin SOT-89 surface-mount package with exposed tab for thermal conduction. Pin 1 is INPUT, Pin 2 is OUTPUT, and Pin 3 is GND/ADJ (internally connected to ground for fixed-output configuration).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MIC29150-1.2WT and AP1117-1.2AL, the AZ1117R-1.2TRG1 offers optimal balance of SOT-89 footprint efficiency, 1.15 V dropout, and 5–10 mA quiescent current-making it ideal for space- and power-constrained 1.2 V core rail applications where thermal design is managed via PCB copper.

Availability

AZ1117R-1.2TRG1 is available at Aetrix Electronics and suitable for USB peripheral power, sensor interface bias, industrial PLC I/O modules, and consumer set-top box SoC core rails requiring stable component supply with green (halogen-free) packaging and tape-and-reel delivery.

Supply support for AZ1117R-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

BCD Semiconductor Manufacturing Limited is a China-based fabless analog IC designer specializing in power management, LED drivers, and mixed-signal solutions for industrial, consumer, and computing markets.

The AZ1117 series was developed as a cost-optimized, high-reliability LDO family targeting mainstream embedded systems needing robust 1 A regulation in compact packages like SOT-89 and SOT-223.

FAQ

What is the minimum input voltage required for AZ1117R-1.2TRG1 to maintain regulation?

The minimum input voltage is 2.35 V, calculated as VOUT + VDROP = 1.2 V + 1.15 V. Below this, the device enters dropout mode and output voltage drops linearly with input. Operation below 3.0 V input is not recommended per datasheet absolute maximum ratings, as headroom becomes insufficient for guaranteed 1 A output across temperature and process variation.

Can AZ1117R-1.2TRG1 be used without an output capacitor?

No. An output capacitor ≥10 µF (tantalum or ceramic) is mandatory for stability and transient response. Omitting it causes oscillation and potential thermal runaway. The datasheet specifies 22 µF for optimal PSRR and load step performance; using <10 µF risks instability under dynamic loads above 100 mA.

How does thermal shutdown behave during sustained overload?

When junction temperature reaches 150 °C, the device shuts down output and holds off until temperature falls by 25 °C (to 125 °C), then resumes regulation. This hysteresis prevents rapid cycling. During shutdown, quiescent current remains ~5 mA, and the output pin floats-no reverse current flows from output to input.

Is AZ1117R-1.2TRG1 compatible with lead-free reflow profiles?

Yes. The "G1" suffix denotes green (halogen-free) packaging compliant with JEDEC J-STD-020D moisture sensitivity level 3, supporting peak reflow temperatures up to 260 °C for 10 seconds. The SOT-89 package withstands standard Pb-free profiles without delamination or solder joint voiding when PCB pad design follows manufacturer-recommended thermal relief patterns.