NCP1521 - Adjustable Output Voltage Step-Down Converter
Pin No.
Symbol Function 1 VIN Analog Input 2 GND Analog/Power Ground 3 EN Digital Input 4 FB Analog Input 5 LX Analog Output Description Power Supply Input for Analog VCC.
Ground connection for the NFET Power Stage and the Analog Sections of the IC.
Enable for Switching Regulator.
This pi
NCP1521 1.5 MHz, 600 mA, High-Ef ficiency, Low Quiescent Current, Adjustable Output Voltage Step-Down Converter The NCP1521 step- down PWM DC- DC converter is optimized for portable applications powered from one cell Li- ion or three cell Alkaline/NiCd/NiMH batteries.
The device is available in an adjustable output voltage from 0.9 V to 3.3 V.
It uses synchronous rectification to increase efficiency and reduce external part count.
The device also has a built- in 1.5 MHz (nominal) oscillator whi
NCP1521 Features
* ă95.3% of Efficiency for 3.3 V Output and 4.2 V Input and 80 mA Load-Current
* ăSources up to 600 mA
* ă1.5 MHz Switching Frequency
* ăAdjustable Output Voltage from 0.9 V to 3.3 V
* ă30 mA Quiescent Current
* ăSynchronous Rectification for Higher Efficien
