ADP172ACBZ-2.1-R7

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ADP172ACBZ-2.1-R7 Application Field and Working Principle

ADP172ACBZ-2.1-R7 is a high-efficiency linear voltage regulator IC. It is a positive low-dropout (LDO) regulator developed by Analog Devices, which offers excellent performance and low shutdown current, and is capable of providing up to 1.8A peak output current. It is extremely power efficient, offering load transient response times as low as 7 µs to a 200 mA load step.

Applications

The ADP172ACBZ-2.1-R7 is optimally suited for portable and handheld device applications such as mobile phones, PDAs, portable media players, wearable electronics, automotive systems, and other battery-powered systems. It is also applicable to laptops, desktops and server systems. This voltage regulator IC is capable of working at a junction temperature of up to 85 degrees Celsius, making it suitable for operations in industrial and commercial environments.

Working Principle

The ADP172ACBZ-2.1-R7 is a voltage Reference Divide (VRD) type linear regulator. It works by using an external capacitive divider to generate a 0.2V reference voltage. This reference voltage is compared to the input voltage on the ADP172ACBZ-2.1-R7 feedback pin. The output is then enabled until the comparison of the two voltages is equal. The reference voltage is adjustable and the output voltage can be set from 0.8V to 7.0V depending on the reference voltage of the external divider.

The device is set for a fixed output voltage using a single Capacitive Divider Network. The reference resistor is connected externally between the FB/VREF pin and the ground pin, while the feedback resistor is connected between the FB/VREF pin and the output pin. The output voltage can be varied by changing these resistors in the network. The output voltage is regulated by the Internal regulators feedback loop. The loop ensures that the output voltage remains within the range of - 0.2V and 0.2V of the fixed reference voltage.

The device also has a power shutdown mode. When the device is powered down, the output voltage is brought to 0V and the device enters the power-saving mode. This ensures that no leakage current is drawn from the power source.

Conclusion

In conclusion, the ADP172ACBZ-2.1-R7 is a linear voltage regulator IC from Analog devices which offers great performance, low operating current and excellent power efficiency. The device is capable of providing up to 1.8A peak output current and can be used for devices that are powered by a battery, such as mobile devices, laptops, and other portable electronic equipment. The device is set for a fixed output voltage using an external Capacitive Divider Network and is capable of working at a junction temperature of up to 85 degrees Celsius. The device can be used in a wide range of applications, thanks to its low power consumption and excellent power efficiency.

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