AZ1117S-3.3TRE1

Voltage Dropout (Max):	1.25V @ 1A
Supplier Device Package:	TO-263-2
Package / Case:	TO-263-3, D²Pak (2 Leads + Tab), TO-263AB
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Protection Features:	Thermal Shutdown
Control Features:	--
PSRR:	75dB (120Hz)
Current - Quiescent (Iq):	10mA
Current - Output:	1A
Series:	AZ1117
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.3V
Voltage - Input (Max):	15V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Overview of AZ1117S-3.3TRE1

The AZ1117S-3.3TRE1 is a low-dropout (LDO) linear voltage regulator designed and manufactured by Diodes Incorporated specifically for use in post-regulation applications. This low-cost, low-power, single-output regulator handles high transient loads with its low-dropout characteristics and its reference circuitry that includes an operational amplifier and a voltage divider.

Functional Description of AZ1117S-3.3TRE1

The AZ1117S-3.3TRE1 provides a regulated output voltage with current-limiting and short-circuit protection. It can operate from an input voltage range of 4.5V to 30V. The maximum output current is limited to 1A. The output voltage can be adjusted using an external resistor divider.The AZ1117S-3.3TRE1 features a low-dropout voltage of 300mV at 1A and a low quiescent current of 10uA. It also features a low-temperature coefficient of 80ppm/ºC and a fast transient response.

Applications of AZ1117S-3.3TRE1

The AZ1117S-3.3TRE1 is well-suited for a variety of post-regulation applications. This includes post-regulating a step-down switching regulator, supplying clean power for RF circuits, powering microcontrollers, and providing accurately regulated voltage for critical analog circuits.The AZ1117S-3.3TRE1 also offers excellent thermal performance and EMI/RFI noise reduction. This makes it ideal for use in high-power, space-constrained applications where noise-sensitive circuitry requires clean regulated power.

Working Principle of AZ1117S-3.3TRE1

The AZ1117S-3.3TRE1 is a linear voltage regulator, which means it uses a series of transistors to regulate the output voltage. The amount of current flowing through the transistors is adjusted in order to maintain a constant output voltage. This is achieved by a voltage divider, an operational amplifier, and a series of transistors.The voltage divider determines the output voltage by creating a reference voltage that is equal to the output voltage. The operational amplifier compares the continuous output voltage with the reference voltage and adjusts the current flow through the transistors accordingly. This ensures that the output voltage remains constant regardless of changes in the input voltage or load conditions.

Conclusion

The AZ1117S-3.3TRE1 is an excellent choice for applications that require a low-dropout linear voltage regulator. It offers low quiescent current, fast transient response, low-dropout operation and current-limiting protection. In addition, its low-temperature coefficient and EMI/RFI noise reduction capabilities make it ideal for use in high-power, space-constrained applications. This makes it the perfect choice for post-regulation applications.

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