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Converters | NCP1423
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。
应用
- 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
特性
- 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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NCP1423DMR2G
Active
Pb
A
H
P
Micro10
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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