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Richtek

RT8259為高壓輸入的降壓轉換器,可支援輸入電壓範圍從4.5V至24V,最大輸出電流至1.2A。電流模式操作提供快速的暫態回應與簡易的迴路穩定架構,並提供了逐週期形式的限流機制與熱關斷保護功能。RT8259採用SOT-23-6 與TSOT-23-6兩種封裝規格。

應用

  • Distributed Power Systems
  • Battery Charger
  • Pre-Regulator for Linear Regulators
  • WLED Drivers
主要規格
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
關鍵特性
  • 可操作輸入電壓範圍:4.5V至24V
  • 可調輸出電壓範圍:0.8V 至 15V
  • 輸出電流1.2A
  • 0.3Ω內部功率級MOSFET 開關
  • 效率高達 92%
  • 固定切換頻率1.4MHz
  • 可採用低ESR的輸出陶瓷電容達到輸出穩定
  • 熱關斷保護
  • 逐週期的過電流限制保護
  • 符合RoHS規範與無鹵特性
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
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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