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RT8020 為雙通道高效率脈波寬度調變(PWM)降壓型DC/DC 轉換器。可在寬輸入範圍2.5V 至 5.5V輸出1A電流。RT8020適用于由單一鋰電池供電的可攜式電子裝置,例如行動電話、PDA與掌上型裝置。
RT8020 具備兩種操作模式:PWM/低壓降 自動切換模式以及關機模式。操作于PWM模式時可藉由內部具備低RDS(ON)的同步整流元件大幅的降低導通損耗。並不需外加蕭特基二極體於實際應用中。
RT8020當PWM操作時無法連續導通上端PMOS時,進入低壓降模式。當EN腳位為低電位時,進入關機模式,消耗電流小於0.1μA。
由於操作在固定頻率1.5MHz,可由較小封裝的元件進行濾波設計得到較平滑的切換漣波,可藉由WDFN-12L 3x3的封裝提供小面積PCB的設計應用。其他特色包括緩啟動、具2%精準度的低內部參考電壓、過溫保護與過電流保護等。

應用

  • Mobile Phones
  • Personal Information Appliances
  • Wireless and DSL Modems
  • MP3 Players
  • Portable Instruments
主要規格
RT8020 RT8020A RT8020B RT8020C RT8020D
Status Active Active Active Active Active
Vin (min) (V) 2.5 2.5 2.5 2.5 2.5
Vin (max) (V) 5.5 5.5 5.5 5.5 5.5
Number of Outputs 2 2 2 2 2
Vout (min) (V) 0.6 0.6 0.6 0.6 0.6
Vout (max) (V) 5.5 5.5 5.5 5.5 5.5
Output Adj. Method Resistor Fixed Fixed Fixed Fixed
Iout (max) (A) 1 1 1 1 1
Current Limit (typ) (A) 1.5 1.5 1.5 1.5 1.5
Freq (typ) (kHz) 1500 1500 1500 1500 1500
Freq (min) (kHz) 1200 1200 1200 1200 1200
Freq (max) (kHz) 1800 1800 1800 1800 1800
Ext Sync No No No No No
Ron_HS (typ) (mOhm) 280 280 280 280 280
Ron_LS (typ) (mOhm) 250 250 250 250 250
Iq (typ) (mA) 0.05 0.05 0.05 0.05 0.05
Features 100% Duty Cycle;Current Mode Control;Enable Input;Force PWM;Internal Compensation;OCP;OTP;PSM;Stable with Ceramic Capacitor 100% Duty Cycle;Current Mode Control;Enable Input;Force PWM;Internal Compensation;OCP;OTP;PSM;Stable with Ceramic Capacitor 100% Duty Cycle;Current Mode Control;Enable Input;Force PWM;Internal Compensation;OCP;OTP;PSM;Stable with Ceramic Capacitor 100% Duty Cycle;Current Mode Control;Enable Input;Force PWM;Internal Compensation;OCP;OTP;PSM;Stable with Ceramic Capacitor 100% Duty Cycle;Current Mode Control;Enable Input;Force PWM;Internal Compensation;OCP;OTP;PSM;Stable with Ceramic Capacitor
Package Type WDFN3x3-12 WDFN3x3-12 WDFN3x3-12 WDFN3x3-12 WDFN3x3-12
關鍵特性
  • 2.5V 至5.5V 輸入範圍
  • 可調輸出範圍0.6V 至VIN
  • 1.2V、1.3V、 1.8V、 2.5V 與 3.3V 的固定/可調 輸出電壓
  • 1A 輸出電流
  • 效率達95%
  • 不需外加蕭特基二極體
  • 每通道50μA 的靜態電流
  • 1.5MHz 固定頻率的PWM操作
  • 小型的 12-引腳 WDFN 封裝
  • 符合RoHS規範與100%的引腳無鉛特性
Additional Documents
Title Last Update ShareDownload
Power Management Components for Lithium-Ion Battery Powered Applications
鋰離子電池電源管理IC選擇指南
2020/12/07
Reference Design
TitleLast UpdateDownload
立錡負載暫態量測工具2018/11/01
Part NumberPackage TypePackage Qty.Free SampleDistributorStockBuy From Authorized Distributor
RT8020CGQWWDFN3x3-121,500 Request Digikey 1,225 Buy
Mouser Lead-Time: 14 weeks Not Available
WPG Lead-Time: 14 weeks Not Available
RT8020GQWWDFN3x3-121,500 Request Digikey 5,830 Buy
Mouser Lead-Time: 14 weeks Not Available
WPG Lead-Time: 14 weeks Not Available
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