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RT8279为内置功率开关元件的降压型转压器,可在宽输入电压范围内达到5A的的连续电流输出,并具有良好的负载与电源电压调节率,电流模式操作提供快速的瞬时响应与简易的回路稳定架构。RT8279并提供了逐周期形式的限流机制与热关断保护功能,操作在关机模式时,转换器只有25µA的低电流消耗。RT8279只需要少数的外部元件,提供更便利轻巧的应用方案。RT8279采用SOP-8 (裸露焊盘)的封装规格。

应用

  • Distributive Power Systems
  • Battery Charger
  • DSL Modems
  • Pre-regulator for Linear Regulators
主要规格
RT8279
Status Active
Vin (min) (V) 5.5
Vin (max) (V) 36
Number of Outputs 1
Vout (min) (V) 1.222
Vout (max) (V) 26
Output Adj. Method Resistor
Iout (max) (A) 5
Current Limit (typ) (A) 7.5
Freq (typ) (kHz) 500
Freq (min) (kHz) 425
Freq (max) (kHz) 575
Ext Sync No
Ron_HS (typ) (mOhm) 110
Iq (typ) (mA) 0.6
Features Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;Force PWM;Internal Compensation;OCP;OTP;Stable with Ceramic Capacitor;UVP
Package Type PSOP-8
关键特性
  • 输出电流高达5A
  • 内部的缓启动设计
  • 110mΩ 内部功率MOSFET开关
  • 具内部的补偿机制可减少外部元件数量
  • 效率高达 90%
  • 25μA 停机电流
  • 500kHz恒定操作频率
  • 热关断保护
  • 逐周期的过电流保护
  • 5.5V 至 36V 宽输入电压操作范围
  • 1.222V 至 26V 可调输出电压范围
  • 采用SOP-8 (裸露焊盘)的封装规格
  • 符合RoHS规范与无卤特性
Technical Documents
TitleItem TypeLast UpdateDownload
立锜全系列产品选择指南 [Jan., 2024] Selection Guide2024/01/19
立锜精选产品 Product Tree 手册 [Aug., 2023] Selection Guide2023/08/07
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
RT8279GSPPSOP-82,500 Request Digikey 21,699 Buy
Mouser Lead-Time: 14 weeks Not Available
WPG Lead-Time: 14 weeks Not Available
Evaluation Board
Part NumberDistributorStockBuy From Authorized Distributor
EVB_RT8279GSP Digikey 3 Buy
Mouser Lead-Time: 14 weeks Not Available
WPG Lead-Time: 14 weeks Not Available
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