AZ1117D-1.2TRE1

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AZ1117D-1.2TRE1: Application Field and Working Principle

The AZ1117D-1.2TRE1 is a 1A low-dropout (LDO) linear voltage regulator manufactured by Diodes Incorporated, with a wide range of operating input voltage and guaranteed 1.2V output voltage. This device is categorized as a PMIC (Power Management IC) voltage regulator in the “Linear” class. Its applications include battery-powered devices with low input voltage, automotive systems, provisions for regulated 1.2V output from an unregulated input, and other related electronic applications. In this article, we explore the working principle, features, and application field of the AZ1117D-1.2TRE1.

Features of the AZ1117D-1.2TRE1

The AZ1117D-1.2TRE1 boasts a number of user-friendly and environment-friendly features. Some of its key features include:

• Very low dropout voltage (maximum of 250mV on the load line)
• High-output accuracy (±0.8%)
• Low quiescent current (maximum of 10mA)
• High power supply rejection ratio (60dB at 1KHz)
• Low temperature coefficient (maximum 0.1mV/°C)
• Built-in thermal shutdown protection
• Wide input voltage range (2.5V-11V DC input)
• Guaranteed 1.2V output voltage
• Lead-free and RoHS compliant design

Application Field of the AZ1117D-1.2TRE1

The AZ1117D-1.2TRE1 is targeted towards applications that require a low dropout voltage and a guaranteed 1.2V output voltage, such as battery-powered handheld devices, automotive systems, and general-purpose voltage regulation circuits. The device is suitable for use with modern processors, ASICs, microcontrollers, and other devices that would benefit from its high precision, low quiescent current, low dropout voltage, and wide input voltage range. It also finds applications as a reset generator for radio receivers, a reference voltage for A/D converters, a bias voltage for amplifiers, and a voltage reference for other associated circuitry.

Working Principle of the AZ1117D-1.2TRE1

Similar to other PMIC linear regulators, the AZ1117D-1.2TRE1 operates on the fact that when current passes through a resistor, a voltage drop is produced. The resistor, R1, acts as a reference voltage in this device, while the voltage across R2, Vout, is regulated at 1.2V. The differential voltage between the two resistors is adjusted by the transistor. This inverted feedback circuit of the device prevents Vout from deviating significantly from the intended 1.2V, owing to the input voltage or external load. The AZ1117D-1.2TRE1 incorporates a two-stage protection circuit, to protect the device and the load from high temperature, low input supply voltage, and excessive output current. The protection circuit shuts down the device when any of the conditions mentioned above occur, in order to prevent damages to the circuit and other components.

Conclusion

The AZ1117D-1.2TRE1 is a 1A LDO linear voltage regulator from Diodes Incorporated. With its wide range of operating input voltage, guaranteed 1.2V output voltage, and numerous user and environment-friendly features, the device is suitable for low dropout voltage and 1.2V output voltage applications, such as battery-powered devices, automotive systems, and general voltage regulation circuits. The working principle of the device is based on an inverted feedback circuit, in which the transistor is used to adjust the differential voltage between the two reference resistors, in order to regulate a 1.2V output voltage.

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