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RT8024,500mA 5V 同步整流高頻降壓芯片

RT8024】500mA 5V 同步整流高頻降壓芯片

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RT8024 詳細介紹
相關商品: 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 HX1009

RT8024】 概述
RT8024是一款恒定頻率,采用電流模脈寬調制(PWM)架構的降壓型DC-DC變換器,集成了主開關和同步整流開關,可以獲得更高的效率。2.5V~5.5V的輸入電壓范圍使得RT8024成為單節鋰(離子)電池、三節鎳氫電池或三節鎳鎘電池供電應用的理想選擇。輸出電壓可調節低至0.6V。RT8024可以提供600mA的負載電流。100%占空比下的低壓降工作,延長了電池在便攜系統中的使用壽命。開關頻率在內部被設定為1.5MHz,因此可以采用小尺寸的表面貼裝電感和電容,內部集成了同步整流開關,不再需要外接肖特基二極管,提高了效率。RT8024采用了薄型的5腳SOT封裝,可以節省占位空間。 

RT8024特點
•  RT8024高效率
•  RT8024 1.5MHz的恒定開關頻率
•  RT8024高達600mA的輸出電流
•  RT8024靜態電流典型值為270μA
• RT8024 輸入電壓范圍2.5V~5.5V
•  RT8024輸出電壓可調節,最低0.6V
•  RT8024低壓降工作,可達100%占空比
• RT8024 無需肖特基二極管
• RT8024 短路和過溫保護
•  RT8024輸出過壓保護
•  RT8024關斷電流<1μA
•  SOT23-5封裝
•  RT8024符合RoHS規范及Pb-Free 

RT8024應用
•  蜂窩電話
•  MP3播放器
•  數碼相機
•  便攜儀器
AG体育 •  PC無線網卡

 RT8024General Description

RT8024是高效PWM降壓DC/DC轉換器。在寬輸入電壓范圍2.5V-5.5V是,能輸出400mA電流,RT8024是單節鋰電池供電的便攜式設備理想的選擇,可廣泛應用與PDA、手機以及其他便攜式終端設備。
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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