ADP221ACDZ-1818-R7

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The ADP221ACDZ-1818-R7 is a linear voltage regulator IC package from the iconic ADP power management IC (PMIC) series, produced by Analog Devices. The device is voltage-controlled, adjustable, low-dropout, and easy to install on a PCBA (Printed Circuit Board Assembly). It is a perfect fit for precision regulation of voltages, as well as current transient control in a diverse range of applications, from PC motherboards, to consumer electronics, to green energy and communication systems.

The ADP221ACDZ-1818-R7 is a 3-terminal adjustable 8.4V to 17.8V regulator. It can be used in AC/DC and DC/DC primary level power supply systems, and has a very low dropout voltage which makes it attractive for switching type power supplies used in precision circuits. It is offered in a DDPAK surface mount package that makes it highly suitable for installation in space-constrained, ultra-slim designs. The maximum ouput current is 1.5A.

The main application fields of the ADP221ACDZ-1818-R7 include automotive, industrial, and consumer electronics. It can be used to provide regulated voltages with very low levels of residual ripple, making it an ideal choice for circuits which require precise regulation of power and current. In addition, the linear regulator is capable of providing high levels of power protection, and has a wide operating temperature range, making it suitable for tough temperature cycles and deep temperature penetration.

The ADP221ACDZ-1818-R7 regulates the output by comparing the reference voltage with the feedback voltage. The output voltage is regulated by using a simple linear amplifier circuit to drive an internal pass transistor, either a PNP or NPN type, depending on the output voltage configuration. The reference voltage is externally set via an external resistor divider. The feedback voltage is derived from the output of the regulator. The output voltage is held within the regulation band by varying the quiescent current of the pass transistor, thereby regulating the output voltage.

The main features of the ADP221ACDZ-1818-R7 are as follows:
• Low Dropout Voltage: 0.3V max V
• Low Quiescent Current: 35uA max
• Input Voltage: 23V max
• Temperature Range: -40°C to +125°C
• Output Voltage Tolerance: ±2%
• Output Current: 1.5A max
• Package: 8-Pin DDPAK
• ESD Protection: 5kV HBM, 3kV CDM
• Thermal Protection: Internal Thermal Shutoff

In conclusion, the ADP221ACDZ-1818-R7 is a linear voltage regulator that can be used in a variety of applications, ranging from automotive and industrial to consumer electronics. It provides excellent precision regulation of the output voltage and current, and offers a wide range of features, such as low dropout voltage, low quiescent current, and thermal protection.

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