器件名称: PS0021
功能描述: High Efficiency PFM Step-up DC/DC Converter
文件大小: 519.52KB 共12页
简 介:PS0021
High Efficiency PFM Step-up DC/DC Converter
FEATURES
PFM control Asynchronous Booster Up to 90% Efficiency Quiescent Supply Current: 5A Zero Shutdown current Output Voltage Accuracy: ±1% Fixed Output Voltage Provides 20mA from single AAA cell Input Voltage Range: 0.8V to 5.5V Startup Voltage : 0.9V 3L SOT-23 and 6L SOT-26 Package Wireless mice, keyboard Pagers Remote Controls Wireless Headsets Wireless Transmitters Personal Medical Devices Digital Still Cameras MP3/MP4 Players Single-Cell Battery-Powered Devices Low-Power Hand-Held Instruments The PS0021 compact, high-efficiency, step-up DCDC converters are available in tiny, 3-pin thin SOT23 and 6-pin thin SOT26 packages. They feature an extremely low 5A quiescent supply current to ensure the highest possible light-load efficiency. Optimized for operation from one to two alkaline or nickel-metal-hydride (NiMH) cells, or a single Li+ cell, these devices are ideal for applications where extremely low quiescent current and ultra-small size are critical. The PS0021 also feature proprietary noisereduction circuitry, which suppresses electromagnetic interference (EMI) caused by the inductor in many step-up applications. The family offers different combinations of fixed outputs, shutdown, and EMI reduction (see Selector Guide). Its unique design is optimized for high efficiency at light load condition.
DESCRIPTION
APPLICATIONS
TYPICAL APPLICATION CIRCUIT
July 2007
www.picsemi.com 2007 Power IC. All……
