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发布者:微桥PT1305 发布时间:2010/8/4 阅读:7601次    关键字: PT1305
PT1305-高电压升压IC


PT1305-High Voltage Step-Up Converter PDF文档下载

PT1305是一个升压型DC/DC转换器.PT1305在1.25MHz开关,允许使用纤巧,低成本,低高度电感和电容器.内部恒定频率补偿电流模式PWM架构,可预测输出噪声易于过滤.低ESR陶瓷电容器可用于改善输出,进一步降低噪音,

PT1305升压转换器可以达到输出24V.它可以产生从3.6V至18V 30mA电流。

GENERAL DESCRIPTION
The PT1305 is a step-up DC/DC converter designed for driving up to 24V from a single cell Lithium Ion battery. The PT1305 switches at 1.25MHz, allowing the use of tiny, low cost and low height inductors and capacitors. A constant frequency internally compensated current mode PWM architecture results in low, predictable output noise that is easy to filter. Low ESR ceramic capacitors can be used at the output, further reducing noise to millivolt level. The high voltage switch on the PT1305 is rated at 26V, making the devices ideal for boost converters up 24V. It can generate 18V at 30mA from 3.6V supply. The PT1305 is available in SOT23-6 and QFN8 packages.
 
FEATURES
 
¨          18V at 30mA from 3.6V
¨          Up to 87% Efficiency
¨          1.25MHz Fixed Switching Frequency
¨          High output voltage up to 24V
¨          Uses small surface mount components
¨          Low shutdown current < 1uA
¨          SOT23-6 and QFN-8 Packages
 
APPLICATIONS
 
¨          TFT-LCD Bias Supplies
¨          Local 12V or 18V Supplies
¨          Cordless phones
¨          Digital Cameras
 
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