AZ1117D-ADJTRE1 Integrated Circuits (ICs)

Series:	AZ1117
Packaging:	Tape & Reel (TR)
Part Status:	Active
Output Configuration:	Positive
Output Type:	Adjustable
Number of Regulators:	1
Voltage - Input (Max):	15V
Voltage - Output (Min/Fixed):	1.25V
Voltage - Output (Max):	13.75V
Voltage Dropout (Max):	1.25V @ 1A
Current - Output:	1A
Current - Quiescent (Iq):	10mA
PSRR:	75dB (120Hz)
Control Features:	--
Protection Features:	Thermal Shutdown
Operating Temperature:	-40°C ~ 125°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	TO-252-3, DPak (2 Leads + Tab), SC-63
Supplier Device Package:	TO-252-2

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Introduction

The AZ1117D-ADJTRE1 is a family of linear voltage regulator integrated circuits (ICs) designed by Allegro Microsystems, Inc. It is a medium current regulator that combines the advantages of a low quiescent current, high accuracy, and easy customization through the addition of standard external components. This device is suitable for a wide range of applications, such as automotive, mobile communications, computer peripherals, and general industrial control systems. It is also appropriate for use in applications with high voltage transients and heavy load conditions.

Features and Specifications

The AZ1117D-ADJTRE1 is available in two output voltage models: 2.5 V and 3.3 V. The output current can be adjusted by adding external resistors, allowing for medium current output in the range of 10-300 mA. It features protection against overcurrent and overvoltage, making it suitable for use in harsh environments. It also contains low ESR capacitors to reduce noise and ensure stability. The operating temperature range is -40°C to +125°C and the device complies with the Lead-Free Solder Process Specification (Telcordia GR-78-CORE).

Application Field and Working Principle

The AZ1117D-ADJTRE1 is well suited for use in automotive, computer, mobile communications, and industrial control applications. It is designed to provide a steady and regulated output voltage to peripheral components and circuits, regardless of varying input conditions. An IC regulator is powered by an external power supply, such as a DC battery. When the voltage from the power supply exceeds the output voltage of the regulator, the IC will activate and switch the transistor internal in its circuit. The transistor amplifies the input voltage, which will regulate the output voltage by providing the necessary control voltage to the external components. As the varying input voltage current passes through the transistor, the voltage is dropped, and the output voltage remains steady. The output voltage is determined according to the equation Vout = Vin - Vdrop = Vin - R1 • (Iload + Iq) , where Vin is the input voltage, Vdrop is the voltage drop of the internal transistor, R1 is the resistor value, Iload is the load current, and Iq is the quiescent current.The AZ1117D-ADJTRE1 also has special protection features. An overvoltage protection circuit is included to protect against excessive input voltages, while an overcurrent protection circuit prevents excessive current flow in the IC.

Conclusion

The AZ1117D-ADJTRE1 from Allegro Microsystems, Inc. is a family of linear voltage regulators suitable for a wide range of applications in the automotive, computer, mobile communications, and industrial control industries. It combines high accuracy, low quiescent current, high temperature range, and protection against overvoltage and overcurrent. The output voltage can be adjusted externally to provide medium current output in the range of 10-300 mA. It is an ideal solution for applications with varying input conditions and heavy load conditions.

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