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RT8024,500mA 5V 同步整流高频降压芯片

RT8024】500mA 5V 同步整流高频降压芯片

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RT8024 详细介绍
相关商品: RT8008PB RT8024PB RT8010PQW RT8020APQW EUP3472ADIR1 EUP3476DIR1 LP3202AB5F SY8008B SY8009C RT8020 EUP3406 EUP3408VIR1 LP3202 RT8009 EUP3472 RT8016 PAM2301 MP1484 MP2307 RT8010 EUP3408 EUP3020 SY8008 AT1366 OCP2150 APS1006 LM3671 LM3670 XC9226 XM5063 XM5064 SY8009B

RT8024】 概述
RT8024是一款恒定频率,采用电流模脉宽调制(PWM)架构的降压型DC-DC变换器,集成了主开关和同步整流开关,可以获得更高的效率。2.5V~5.5V的输入电压范围使得RT8024成为单节锂(离子)电池、三节镍氢电池或三节镍镉电池供电应用的理想选择。输出电压可调节低至0.6V。RT8024可以提供600mA的负载电流。100%占空比下的低压降工作,延长了电池在便携系统中的使用寿命。开关频率在内部被设定为1.5MHz,因此可以采用小尺寸的表面贴装电感和电容,内部集成了同步整流开关,不再需要外接肖特基二极管,提高了效率。RT8024采用了薄型的5脚SOT封装,可以节省占位空间。 

RT8024特点
•  RT8024高效率
•  RT8024 1.5MHz的恒定开关频率
•  RT8024高达600mA的输出电流
•  RT8024静态电流典型值为270μA
• RT8024 输入电压范围2.5V~5.5V
•  RT8024输出电压可调节,最低0.6V
•  RT8024低压降工作,可达100%占空比
• RT8024 无需肖特基二极管
• RT8024 短路和过温保护
•  RT8024输出过压保护
•  RT8024关断电流<1μA
•  SOT23-5封装
•  RT8024符合RoHS规范及Pb-Free 

RT8024应用
•  蜂窝电话
•  MP3播放器
•  数码相机
•  便携仪器
•  PC无线网卡

 RT8024General Description

RT8024是高效PWM降压DC/DC转换器。在宽输入电压范围2.5V-5.5V是,能输出400mA电流,RT8024是单节锂电池供电的便携式设备理想的选择,可广泛应用与PDA、手机以及其他便携式终端设备。
The RT8024 is a high-efficiency pulse-width-modulated (PWM) step-down DC-DC converter. Capable of delivering 400mA output current over a wide input voltage range from 2.5V to 5.5V, the RT8024 is ideally suited for portable electronic devices that are powered from 1-cell Li-ion battery or from other power sources within the range such as cellular phones, PDAs and handy-terminals.
Internal synchronous rectifier with low RDS(ON) dramatically reduces conduction loss at PWM mode. No external Schottky diode is required in practical application. The RT8024 automatically turns off the synchronous rectifier while the inductor current is low and enters discontinuous PWM mode. This can increase efficiency at light load condition.
The RT8024 enters Low-Dropout mode when normal PWM cannot provide regulated output voltage by continuously turning on the upper P-MOSFET. RT8024 enter shutdown mode and consumes less than 0.1μA when EN pin is pulled low.
The switching ripple is easily smoothed-out by small package filtering elements due to a fixed operation frequency of 1.5MHz. This along with small SOT-23-5 and TSOT-23-5 package provides small PCB area application. Other features include soft start, lower internal reference voltage with 2% accuracy, over temperature protection, and over current protection.

 RT8024Features

• +2.5V to +5.5V Input Range
• Adjustable Output From 0.6V to VIN
• 1.0V, 1.2V, 1.5V, 1.8V, 2.5V and 3.3V Fixed/Adjustable Output Voltage
• 400mA Output Current, 1A Peak Current
• 95% Efficiency
• No Schottky Diode Required
• 1.5MHz Fixed-Frequency PWM Operation
• Small SOT-23-5 and TSOT-23-5 Package
• RoHS Compliant and Halogen Free

 RT8024Application

• Cellular Telephones
• Personal Information Appliances
• Wireless and DSL Modems
• MP3 Players
• Portable Instruments


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