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AZ1117IH-1.8TRG1

DIOAZ1117IH-1.8TRG1

Diodes Incorporated
Linear Voltage Regulator IC Positive Fixed 1 Output 1A SOT-223-3
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Overview

The AZ1117IH-1.8TRG1 is a low dropout positive voltage regulator providing a fixed 1.8V output at up to 1A. It is designed to operate with a maximum input voltage of 15V and features an on-chip thermal shutdown for system protection. This regulator is optimized for low-voltage applications requiring stability and high power supply rejection ratio.

Why Choose This Part

The device offers a high PSRR of 70dB at 120Hz, ensuring clean power for noise-sensitive digital components. It is fully compatible with low-ESR ceramic capacitors, allowing for reduced PCB footprint and lower system cost. Integrated thermal shutdown protection and a wide operating temperature range of -40C to 125C provide reliability in demanding thermal environments.

Applications

USB Powered Devices
Provides a stable 1.8V rail for digital logic and microcontrollers from a 5V USB bus.
PC Motherboards
Local regulation for auxiliary logic circuits and chipset termination voltages.
Consumer Electronics
Used in DVD players and set-top boxes to power low-voltage internal processors and memory.
Add-on Cards
Compact voltage regulation for PCI-e or specialized interface cards within a 1A current budget.

Key Specifications

PSRR 70dB (120Hz)
Output Type Fixed
Mounting Type Surface Mount
Package / Case TO-261-4, TO-261AA
Current - Output 1A
Protection Features Thermal Shutdown
Number of Regulators 1
Output Configuration Positive
Operating Temperature -40degC ~ 125degC (TJ)
Voltage - Input (Max) 15V
Voltage Dropout (Max) 1.3V @ 800mA
Supplier Device Package SOT-223-3
Current - Quiescent (Iq) 6 mA
Voltage - Output (Min/Fixed) 1.8V

Getting Started

To implement this regulator, place a minimum 10uF capacitor on the output for stability and ensure the input voltage stays below the 15V maximum. When designing the PCB layout for the SOT-223 package, maximize the copper area connected to the VOUT tab to assist with heat dissipation at high current loads.

Also Consider

LD1117S18TR STMicroelectronics - A widely available industry standard 1117-series regulator in the same SOT-223 package.
NCP1117ST18T3G ONonsemi - Features similar 1A output capability and is often used as a drop-in replacement in 1.8V fixed rail applications.
TLV1117-18IDCYR TITexas Instruments - Offers high precision and reliability for industrial grade 1.8V power regulation requirements.