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NCP1521 - Adjustable Output Voltage Step-Down Converter

Description

Pin No.

Description Power Supply Input for Analog VCC.

Ground connection for the NFET Power Stage and the Analog Sections of the IC.

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 Efficiency.
  • ă2.7 V to 5.5 V Input Voltage Range.
  • ăThermal Limit Protection.
  • ăShutdown Current Consumption of 0.3 mA.
  • ăShort Circuit Protection.
  • ăThis is a Pb-Free Devic.

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Datasheet Details

Part number NCP1521
Manufacturer onsemi
File Size 164.09 KB
Description Adjustable Output Voltage Step-Down Converter
Datasheet download datasheet NCP1521 Datasheet

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Full PDF Text Transcription

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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 which reduces component size by allowing a small inductor and capacitors. Automatic switching PWM/PFM mode offers improved system efficiency. Finally, it includes an integrated soft-start, cycle-by-cycle current limiting, and thermal shutdown protection.
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