NCP1509 Datasheet (ON Semiconductor) - High Efficiency Synchronous Step-Down DC-DC Converter

NCP1509, High Efficiency Synchronous Step-Down DC-DC Converter

Pin Number Name Type 1 GNDA Analog GND 2 GNDP Power GND 3 LX Power Output 4 VCCP Power Input 5 VCCA Power Input 6 FB Analog Input 7 CB0 Analog Input 8 CB1 Analog Input 9 SHD Analog Input 10 SYNC Analog Input Description Ground connection for the Analog Section of the IC.

NCP1509 Up to 500 mA, 1 MHz, High Efficiency Synchronous Step Down DC DC Converter in DFN Package The NCP1509 step down PWM DC DC converter is optimized for portable applications powered from 1 cell Li ion or 3 cell Alkaline/NiCd/NiMH batteries.

This DC DC converter utilizes a current mode control architecture for easy compensation and better line regulation.

It also uses synchronous rectification to increase efficiency and reduce

NCP1509 Features

* High Efficiency: 92.5% for 1.8 V Output at 3.6 V Input and 125 mA Load Current 91% for 1.8 V Output at 3.6 V Input and 300 mA Load Current

* Digital Programmable Output Voltages: 1.05, 1.35, 1.57 or 1.8 V

* Output Current up to 500 mA at Vin = 3.6 V

* Low Quiescent