ADP7156ARDZ-2.8-R7

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ADP7156ARDZ-2.8-R7 is a programmable low dropout (LDO) linear voltage regulator that offers excellent precison, low temperature dependency and low quiescent current for space-constrained and high-performance applications. It is an efficient three-terminal device capable of supplying a maximum of 280mA of output current with an ultra-low dropout voltage and output voltage accuracy of ±1%. It is designed to regulate output voltage with a wide input voltage range of 2.2V to 8.0V, and can adjust output voltage within a range of 1.2V to 5.2V. It is housed in a 7-lead SOT-23 (TO-236AB) package, making it suitable for applications where board space is scarce.

ADP7156ARDZ-2.8-R7 is classified under PMIC - Voltage Regulators - Linear. It is an ideal solution for powering microcontrollers, FPGAs, ADCs and other low power solutions. Thanks to its low quiescent current, it is also suitable for battery-powered applications, providing a low power consumption and ensuring a longer battery lifetime. Other features include wide input voltage range, fast start-up, under-voltage protection, thermal shutdown, over-voltage protection and power saving mode.

The operating principle of the ADP7156ARDZ-2.8-R7 linear voltage regulator is quite straightforward. It works by monitoring the voltage on its output and compares it to the reference voltage. If the output voltage is lower than the reference voltage, the regulator automatically adjusts the current through the device to increase the output voltage and bring it up to the reference voltage. Conversely, if the output voltage is above the reference voltage, the regulator decreases the current to bring the output voltage back down to the reference voltage.

When powered on, the device takes a few milliseconds to establish the output voltage as it first requires time to charge the internal loop-compensation components as well as the output filter capacitors. The ADP7156ARDZ-2.8-R7 also features a fast turn-off, allowing the output voltage to sink to the input voltage within 7µs. The device is characterized for operation over an ambient temperature range of -40°C to +125°C.

In conclusion, the ADP7156ARDZ-2.8-R7 is a highly efficient, low drop-out linear voltage regulator suitable for a wide variety of applications where space is at a premium. It is a three-terminal device featuring excellent precision, low quiescent current and an ultra-low drop out voltage. It is a robust and reliable solution offering numerous protection features, and can adjust the output voltage within a wide range of 1.2V to 5.2V.

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