AZ1117BH-1.8TRE1

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Introduction

The AZ1117BH-1.8TRE1 is a low-dropout voltage regulator from Linear Technology. It is suitable for various applications where a low-dropout, low-noise, and low-power regulator is desired, for instance in battery-operated systems.

Applications

The AZ1117BH-1.8TRE1 is a low-dropout voltage regulator that is ideal for use as a battery charger, inverter, adjustable voltage regulator, and for other systems requiring a reliable power source. It is suitable for powering small processors, discrete logic devices, and other low-power components with input voltage requirements that range from 3V to 17V.

The AZ1117BH-1.8TRE1 is also capable of providing up to 1.2A of current while maintaining an ultra-low dropout voltage over its range of input voltages. This makes it an ideal choice for regulators that have to continuously provide power in situations with limited space, such as embedded applications.

Features

The AZ1117BH-1.8TRE1 offers a number of useful features including:

• An adjustable output voltage range from 0.8V to 1.8V
• An ultra-low dropout voltage of 0.3V over a wide range of input voltages
• An output current capability of 1.2A
• A very low quiescent current of 1.7mA for improved efficiency
• Built-in overload and short-circuit protection
• Adjustable strobe pin for use in delay shutdown
• High power dissipation
• High output current accuracy
• Compact SOP-8 package

Working Principle

The AZ1117BH-1.8TRE1 operates as a low-dropout voltage regulator by using an internal pass element – either an internal transistor or a PMOSFET – to control the voltage across its output terminals. This pass element is initially switched on, allowing the input voltage to reach the output. Once the output voltage reaches its set point, the pass element is switched off, thereby maintaining the output voltage.

The AZ1117BH-1.8TRE1 uses an on-chip precision voltage reference to accurately regulate the output voltage. It also uses an on-chip series pass element, which enables it to operate at very low dropout voltages. The AZ1117BH-1.8TRE1 also incorporates a sloped overload protection to protect against excessive output currents.

The AZ1117BH-1.8TRE1 is a very simple and efficient way of controlling voltage in applications with limited space. It is a reliable and accurate regulator that is ideal for powering small processors, discrete logic devices, and other low-power components.

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