loading
Richtek
关于立锜 | 联络我们 |

RT8020 为双通道高效率脉波宽度调变(PWM)降压型DC/DC 转换器。可在宽输入范围2.5V 至 5.5V输出1A电流。RT8020适用于由单一锂电池供电的可携式电子装置，例如移动电话、PDA与掌上型装置。
RT8020 具备两种操作模式:PWM/低压降 自动切换模式以及关机模式。操作于PWM模式时可藉由内部具备低RDS(ON)的同步整流组件大幅的降低导通损耗。并不需外加萧特基二极管于实际应用中。
RT8020当PWM操作时无法连续导通上端PMOS时，进入低压降模式。当EN脚位为低电位时，进入关机模式，消耗电流小于0.1μA。
由于操作在固定频率1.5MHz，可由较小封装的组件进行滤波设计得到较平滑的切换涟波，可藉由WDFN-12L 3x3的封装提供小面积PCB的设计应用。其他特色包括缓启动、具2%精度的低内部参考电压、过温保护与过电流保护等。

应用

  • Mobile Phones
  • Personal Information Appliances
  • Wireless and DSL Modems
  • MP3 Players
  • Portable Instruments
主要规格
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
关键特性
  • 2.5V 至5.5V 输入范围
  • 可调输出范围0.6V 至VIN
  • 1.2V、1.3V、 1.8V、 2.5V 与 3.3V 的固定/可调 输出电压
  • 1A 输出电流
  • 效率达95%
  • 不需外加萧特基二极管
  • 每通道50μA 的静态电流
  • 1.5MHz 固定频率的PWM操作
  • 小型的 12-引脚 WDFN 封装
  • 符合RoHS规范与100%的引脚无铅特性
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
立锜负载瞬变测试工具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
库存实际状况请联系代理商或业务窗口
TOP