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Richtek

RT8259为高压输入的降压转换器,可支持输入电压范围从4.5V至24V,最大输出电流至1.2A。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,并提供了逐周期形式的限流机制与热关断保护功能。RT8259采用SOT-23-6 与TSOT-23-6两种封装规格。

应用

  • Distributed Power Systems
  • Battery Charger
  • Pre-Regulator for Linear Regulators
  • WLED Drivers
主要规格
RT8259
Status Active
Vin (min) (V) 4.5
Vin (max) (V) 24
Number of Outputs 1
Vout (min) (V) 0.8
Vout (max) (V) 15
Output Adj. Method Resistor
Iout (max) (A) 1.2
Current Limit (typ) (A) 2.1
Freq (typ) (kHz) 1400
Ext Sync No
Ron_HS (typ) (mOhm) 300
Ron_LS (typ) (mOhm) 300
Iq (typ) (mA) 0.55
Features Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;Force PWM;Internal Compensation;OCP;OTP;Stable with Ceramic Capacitor;UVP
Package Type SOT-26;TSOT-26
关键特性
  • 可操作输入电压范围:4.5V至24V
  • 可调输出电压范围:0.8V 至 15V
  • 输出电流1.2A
  • 0.3Ω内部功率级MOSFET 开关
  • 效率高达 92%
  • 恒定切换频率1.4MHz
  • 可采用低ESR的输出陶瓷电容达到输出稳定
  • 热关断保护
  • 逐周期的过电流限制保护
  • 符合RoHS规范与无卤特性
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
RT8259GESOT-263,000 Request Digikey 12,152 Buy
Mouser Lead-Time: 14 weeks Not Available
WPG Lead-Time: 14 weeks Not Available
RT8259GJ6TSOT-263,000 Request Digikey 4,685 Buy
Mouser Lead-Time: 14 weeks Not Available
WPG Lead-Time: 14 weeks Not Available
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