NCP1521BSNT1G Power Switching Regulator NCP1521 SOT23-5 Buck Converter DC-DC 1.5 MHz 600 mA

NCP1521B Buck Converter - DC-DC 1.5 MHz, 600 mA

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−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 a space saving, low profile TSOP5 and UDFN6 packages.

Features

• Up to 96% Efficiency
• Best−In−Class Ripple, including PFM Mode
• Sources up to 600 mA
• 1.5 MHz Switching Frequency
• Adjustable Output Voltage from 0.9 V to 3.9 V
• Synchronous Rectification for Higher Efficiency
• 2.7 V to 5.5 V Input Voltage Range
• Low Quiescent Current
• Shutdown Current Consumption of 0.3 A
• Thermal Limit Protection
• Short Circuit Protection
• All Pins are Fully ESD Protected
• This is a Pb−Free Device
Typical Applications
• Cellular Phones, Smart Phones and PDAs
• Digital Still/Video Cameras
• MP3 Players and Portable Audio Systems
• Wireless and DSL Modems
• Portable Equipment
• USB Powered Devices

Ordering information

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