NCP1402SN30T1

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NCP1402SN30T1 is a powder metal-oxide semiconductor field-effect transistor (MOSFET) switching regulator controller with an integral 0.1Ω low on-resistance P-channel MOSFET. It is designed for the application of low-voltage positive DC-DC converter which can be used for providing regulated power to microprocessors, portable applications, and other systems or devices.

This regulator is a non-synchronous, SSR (steady-state regulation) controller, which operates with an external P-channel MOSFET and provides control and protection functions in a DC-DC converter. It operates in an internally fixed voltage mode, which means that the output voltage is internally pre-programmed via two resistors. The integrated bias regulator circuitry eliminates the need for external bias supply.

The typical application of the NCP1402SN30T1 is as follows:

• Microprocessor core and VI processor core power supplies
• Portable equipment
• Battery-powered systems
• Notebook computer
• Cellular phones and portable communication equipment

The NCP1402SN30T1 is designed to support a wide range of input voltages, from 4.75V to 20V, with output voltages adjustable down to 0.75V. Its allowed power dissipation is 1W and its working frequency is up to 500kHz.

The working principle of the NCP1402SN30T1 is simple. In its steady-state voltage mode, the NCP1402SN30T1 adjusts the duty cycle on the external P-channel MOSFET to control the output voltage based on the feedback voltage. Its current-mode control loop makes the whole system more stable and faster transient response. In addition, it provides many integrated protection functions, such as cycle-to-cycle current limit and overvoltage protection.

Overall, the NCP1402SN30T1 is a robust, reliable and cost-effective DC-DC switching regulator for microprocessor and VI processor core power supplies, portable equipment, battery-powered systems and notebook computers. With its easy-to-use design and embedded protection functions, this IC is an ideal choice for a wide range of applications.

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