NCP1501 Datasheet (ON Semiconductor) - Dual Mode PWM/Linear Buck Converter

NCP1501, Dual Mode PWM/Linear Buck Converter

Pin # Symbol Pin Description 1 SHD Enable Pin for the NCP1501.

This pin is active high.

Internal pull down resistor forces the part off if the pin is not connected on the board.

2 SYN External Synchronization Signal Pin.

The device will operate in PWM mode if a clock signal is present.

NCP1501 Dual Mode PWM/Linear Buck Converter The NCP1501 is a dual mode regulator that operates either as a PWM Buck Converter or as a Low Drop Out Linear Regulator.

If a synchronization signal is present, the NCP1501 operates as a current mode PWM converter with synchronous rectification.

The synchronization signal allows the user to control the location of the spurious frequency noise generated by a PWM converter.

Linear mode is active when a synchronization signal is not present.

The NCP1501 c

NCP1501 Features

* Synchronous Rectification for Higher Efficiency in PWM Mode

* Linear Mode Operation for Low Noise Output at Low Loads

* Integrated MOSFETs and Feedback Circuits

* Cycle

* by

* Cycle Peak Current Limit of 800 mA (typ)

* Automatic Switching Between PWM and Linear Mode