Converters | NCP1423

升压转换器，同步整流，PFM，DC-DC，400 mA，带真切断和振荡消除器

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概览

NCP1423 是一款单片微功率高频步升开关转换器 IC，专门设计用于负载高达 400mA 的电池供电手持电子产品。它集成了同步整流，从而提高能效，且无需外部肖特基二极管。高开关频率（可达 600 KHz），支持使用薄型、小尺寸的电感器和输出电容。禁用此 IC 时，LX 或 BAT 到 OUT 的内部传导路径完全阻断，OUT 引脚与电池隔离。这就实现了真切断。还集成了振荡消除器，以消除非连续传导模式下的高频振铃。电池电量低检测器、逐周期电流限制、过电压保护和高温关断为各种电池供电的应用提供增值功能。上述功能全部打开时，静态电源电流通常仅为 9 μA。此器件采用紧凑的 Micro-10 封装。

  • Wireless Optical Mouse
  • Wireless Headsets
  • Internet Audio Players
  • Personal Digital Assistants (PDAs)
  • Handheld Instruments
  • Conversion from one/two NiMH or NiCd cells to 1.8 V / 3.3 V
  • High Switching Frequency, up to 600 kHz
  • Low Quiescent Current of 9.0 uA
  • Low Battery Detector
  • 0.8 V Startup at No Load Guaranteed
  • Ring-Killer for Discontinuous Conduction Mode
  • Thermal Shutdown
  • 1.2 A Cycle by Cycle Current Limit
  • Output Current up to 400 mA @ VOUT = 3.3 V, 200 mA @ VOUT = 1.8 V
  • Overvoltage Protection
  • Low Profile and Minimum External Part
  • Open Drain Low-Battery Detector Output
  • Compact Micro-10 Package
  • Pb-Free Package is Available

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VO Typ (V)

IO Typ (A)

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Reference Price

NCP1423DMR2G

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Active

CAD Model

Pb

A

H

P

Micro10

846B

1

260

REEL

4000

Y

Step-Up

Current/Voltage Mode

0.8

6

1.8 to 3.3

0.4

92

600

$0.5347

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