NCP1442T

Application Field and Working Principle

NCP1442T is a high frequency, DC-DC adjustable step-down controller for voltage regulator applications. It has current-mode control for increased accuracy and is needed for cost and space saving in applications such as communication equipment, battery management and portable computer supply. NCP1442T is suitable for a wide range of input voltages from 3V to 24V, and provides a regulated output voltage from 0.8V to VIN.

NCP1442T has two operational modes: discontinuous mode and forced-continuous (constant frequency) mode. In discontinuous mode, the frequency is self-adjusting to provideThe regulator power is increased or decreased according to the load requirement. In forced-continuous mode, the frequency is fixed and does not change even when the load requirements change. This mode reduces switching losses corresponding to the average load current.

Output Voltage and Frequency

NCP1442T offers a wide variety of adjustable output voltages from 0.8V to VIN. Depending on the application and switching frequency, the output voltage can be accurately controlled within the limits of +/- 1%.Its adjustable frequency range is from 100 kHz to 1 MHz.

Protection Features

NCP1442T provides several protection features such as overtemperature protection, overload protection, and overvoltage protection. It also provides an optional shutdown mode which allows the user to disable the output in order to avoid damage in case of overload or other conditions.

Package

NCP1442T is packaged in a standard 8-lead PDIP package, with a maximum junction temperature of +125°C. It also supports a wide range of operating temperatures, from -40°C to +85°C.

Conclusion

NCP1442T is an adjustable step-down controller for voltage regulator applications, offering a wide range of input and output voltages and switching frequencies. It has a range of protection features to protect against excess current, voltage, and temperature. It also has an optional shutdown mode to protect itself against overloads or other conditions.