NCP1521B Datasheet - ON Semiconductor

NCP1521B Step-Down DC-DC Converter

Pin No. Pin Name Type 1 VIN Analog / Power Input 2 GND Analog / Power Ground 3 EN Digital Input 4 FB Analog Input 5 LX Analog Output Description Power supply input for the PFET power stage, analog and digital blocks. The pin must be decoupled to ground by a 4.7 mF ceramic capacit.

Buck Converter - DC-DC 1.5 MHz, 600 mA NCP1521B The NCP1521B step down DC DC converter is a monolithic integrated circuit optimized for portable applications powered from one cell Li Ion or three cell Alkaline/NiCd/NiMH batteries. The part, available in adjustable output voltage versions ranging from 0.9 V to 3.9 V, is able to deliver up to 600 mA. It uses synchronous rectification to increase efficiency and reduce external part count. The device also has a built

NCP1521B Features

* include integrated soft

* start, cycle

* by

* cycle current limiting and thermal shutdown protection. The NCP1521B is available in a space saving, low profile TSOP5 package. Features

* Up to 96% Efficiency

* Best

* In

* Class Ripple, including PFM Mode

NCP1521B_ONSemiconductor.pdf