PQ1X181M2ZPH

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The PQ1X181M2ZPH is part of the family of linear voltage regulating microcircuits. As such, it is designed for use as a voltage regulator for medium power linear applications. This device provides a regulated output voltage that can be adjusted through the use of an external resistor network. The PQ1X181M2ZPH is designed for use in a wide variety of applications, including power supply regulation, power conditioning, automated test equipment, industrial systems and other linear voltage regulation applications.

The PQ1X181M2ZPH is a low dropout linear voltage regulator that is capable of providing a stable voltage over a wide range of load currents and line conditions. It is capable of supplying up to 1.5 A of output current with a dropout voltage of typically 0.63 V. The device includes an adjustable current limit and overtemperature protection. The PQ1X181M2ZPH is available in a SOT-223 power package and is adjustable over the range of 1.7 V to 20 V.

The operating principle of the PQ1X181M2ZPH is simple. The input voltage and output voltage can be divided into two regions, dropout and normal operation. In the dropout region, the input voltage is close to the output voltage and the output current is determined by an external resistor divider. The resistor divider sets the output voltage as a reference voltage level by forcing current through an external resistor and the device\'s internal reference resistor. This reference voltage is then compared to the output voltage. If the output voltage drops below the reference, the PQ1X181M2ZPH will increase the current to maintain the output voltage. If the output voltage exceeds the reference, the device will reduce the current to maintain the output voltage.

Under normal operating conditions, the output voltage is determined by the input voltage, reference voltage, and the external resistor divider. The external resistor divider sets the output voltage as a reference voltage level by forcing current through an external resistor and the device\'s internal reference resistor. The output voltage is then monitored and compared to the reference voltage. If the output voltage exceeds the reference, the device will reduce the current to maintain the output voltage. If the output voltage drops below the reference, the PQ1X181M2ZPH will increase the current to maintain the output voltage.

In addition to voltage regulation, the PQ1X181M2ZPH is also equipped with an adjustable current limit for protection of the load connected to the regulator. The current limit can be set via an external resistor connected to the device\'s CS pin. When the output current reaches the level set by the current limit resistor, the device will begin to limit the output current. If the current limit is exceeded, the device will shut down the output current until the current falls below the limit or the input voltage is disconnected.

The PQ1X181M2ZPH also includes protection against over temperature conditions. If the device\'s junction temperature exceeds a preset level, the device will shut down and latch off. After the thermal condition has been corrected, the limit circuit can be reset by toggling the off/on pin.

In conclusion, the PQ1X181M2ZPH is a low dropout linear voltage regulator designed for medium power linear applications. The device is capable of supplying up to 1.5 A of output current with a dropout voltage of typically 0.63 V. It is equipped with an adjustable current limit and has protection against thermal conditions. The device is available in a SOT-223 power package and is adjustable over the range of 1.7 V to 20 V. With its wide range of applications, the PQ1X181M2ZPH is a great choice for any linear voltage regulation application.

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