NCP1521B Series

Buck Converter, DC-DC, 1.5 MHz, 600 mA

Catalog

Buck Converter, DC-DC, 1.5 MHz, 600 mA

Part	Voltage - Input (Max) [Max]	Voltage - Output (Max) [Max]	Output Configuration	Frequency - Switching	Number of Outputs	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Input (Min) [Min]	Mounting Type	Supplier Device Package	Output Type	Topology	Package / Case	Current - Output	Function	Voltage - Output (Min/Fixed)	Outputs and Type	Outputs and Type	Main Purpose	Voltage - Output [Min]	Voltage - Output [Max]	Board Type	Regulator Topology	Supplied Contents	Voltage - Input	Utilized IC / Part
ON Semiconductor NCP1521ASNT1G	5.5 V	3.3 V	Positive	1.5 MHz	1	85 °C	-40 °C	2.7 V	Surface Mount	5-TSOP	Adjustable	Buck	SOT-23-5 Thin TSOT-23-5	600 mA	Step-Down	0.9 V
ON Semiconductor NCP1521BSNT1G	5.5 V	3.9 V	Positive	1.5 MHz	1	85 °C	-40 °C	2.7 V	Surface Mount	5-TSOP	Adjustable	Buck	SOT-23-5 Thin TSOT-23-5	600 mA	Step-Down	0.9 V
ON Semiconductor NCP1521BEVB				1.5 MHz										600 mA			Non-Isolated	1	DC/DC Step Down	0.9 V	3.3 V	Fully Populated	Buck	Board(s)	3.6 V	NCP1521

Catalog

Buck Converter, DC-DC, 1.5 MHz, 600 mA

Key Features

• 96% efficiency, 30 uA quiescent current, 0.3 uA shutdown current

• 1.5 MHz switching frequency

• Auto-switching between PWM and PFM mode at light load conditions

• Adjustable output voltage from 0.9V to 3.3V

• Best in class Low Ripple even in PFM mode

Description

The NCP1521B 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 part is available in adjustable output voltage versions ranging 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 which reduces component size by allowing smaller inductors and capacitors. Automatic switching PWM/PFM mode offers improved system efficiency. Additional features include integrated soft-start, cycle-by-cycle current limiting and thermal shutdown protection. The NCP1521B is available in space saving, low profile TSOP5 and UDFN6 packages.