ADP1761ACPZ-0.9-R7

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ADP1761ACPZ-0.9-R7 Application Field and Working Principle

ADP1761ACPZ-0.9-R7 is an adjustable low dropout linear regulator that belongs to the PMIC (Power Management IC) voltage regulators category. It is considered to be a low-noise, low-quiescent current voltage regulator, with high accuracy and high PSR (Power Supply Rejection). It is able to accurately supply a regulated output voltage from a given bipolar or unipolar voltage source.

Features

The main features of the ADP1761ACPZ-0.9-R7 are its high efficiency, tiny footprint, low voltage drop, low quiescent current, wide input voltage range, low noise, and high PSR. It also features a high accuracy ±2% output voltage over a temperature range of -40°C to +125°C.

Applications

The ADP1761ACPZ-0.9-R7 can be used in applications such as battery-backed home and office systems, computer motherboards, system/processor power supplies, notebook and desktop PCs, digital point of sale systems, gaming consoles, digital audio players, and other power limited applications.

Working Principle

The ADP1761ACPZ-0.9-R7 is an adjustable linear voltage regulator composed of an input voltage regulator, a bandgap reference, a feedback amplifier, an error amplifier, and a driver. Its working principle is based on setting the output voltage by comparing an external voltage to the bandgap reference voltage. The error amplifier compares the voltage output with the bandgap reference voltage and proportionally adjusts the output current. The output voltage follows the input voltage with a very low voltage drop. The adjustable output range covers from 0.7V to 7V.

Package and Pins

The physical package of the ADP1761ACPZ-0.9-R7 is a SOT-23-5 (Surface-mount package), with 5 pins, with three pins for the inputs, one for the output and one for ground. The pinout is as follows: pin 1 is the input voltage "Output Enable/Disable" pin, pin 2 the voltage adjustment pin, pin 3 the input voltage, pin 4 the output voltage, and pin 5 the ground.

Key Specifications

• Input voltage: 2V to 6V
• Output voltage range: 0.7V to 7V
• Thermal stability: ±2.2% at 25°C +Junction temperature variation
• Temperature range: -40°C to +125°C
• Quiescent current: 18mA
• Leakage current: 0.025mA
• Dropout voltage: 0.9V
• PSR: 96dB
• Package size: 0.8mm x 0.9mm
• Power output: 0.6W (max)

Conclusion

The ADP1761ACPZ-0.9-R7 is an adjustable low dropout linear regulator belonging to the PMIC (Power Management IC) voltage regulators category. It is designed to accurately supply a regulated voltage output, while featuring low voltage drop, low noise, wide input voltage range, low quiescent current and high PSR. Its features make it an ideal option for many applications such as computer motherboards, system/processor power supplies and gaming consoles.

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