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The RT8265 is an asynchronous high voltage buck converter that can support the input voltage range from 4.75V to 24V and the output current can be up to 3A. The IC provides a Feed-forward Voltage Mode operation to achieve the goal of fast line transient response. The RT8265 also provides adjustable soft-start to be a flexible solution for customers.

The chip provides protection functions such as cycle-by-cycle current limiting and thermal shutdown protection. In shutdown mode, the regulator draws 25μA of supply current. The RT8265 is available in a SOP-8 (Exposed Pad) surface mount package.

Applications

  • Distributed Power Systems
  • Battery Charger
  • Pre-Regulator for Linear Regulators
Key Spec.
RT8265
Status Active
Vin (min) (V) 4.75
Vin (max) (V) 24
Number of Outputs 1
Vout (min) (V) 0.8
Vout (max) (V) 15
Output Adj. Method Resistor
Iout (max) (A) 3
Current Limit (typ) (A) 5
Freq (typ) (kHz) 1000
Ext Sync No
Ron_HS (typ) (mOhm) 110
Iq (typ) (mA) 0.8
Features Adjustable Soft-Start;Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;Force PWM;OCP;OTP;Stable with Ceramic Capacitor;UVP
Package Type PSOP-8
Features
  • Wide Operating Input Range : 4.75V to 24V
  • Adjustable Output Voltage Range : 0.8V to 15V
  • Output Current up to 3A
  • 25μA Low Shutdown Current
  • Power MOSFET : 110mΩ
  • High Efficiency up to 93%
  • 1MHz Fixed Switching Frequency
  • Stable with Low ESR Output Ceramic Capacitors
  • Programmable Soft-Start
  • Thermal Shutdown
  • Cycle-By-Cycle Over Current Protection
  • RoHS Compliant and 100% Lead (Pb)-Free
Datasheet
TitleLast UpdateDownload
3A, 24V, 1MHz Asynchronous Step-Down Converter2011/10/05
Technical Documents
TitleItem TypeLast UpdateDownload
Richtek Product Selection Guide [Jan., 2024] Selection Guide2024/01/18
Richtek Featured Product Tree [Aug., 2023] Selection Guide2023/08/07
Reference Design
TitleLast UpdateDownload
Richtek Load Transient Tool2022/07/25
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT8265GSPPSOP-82500 Request Buy from Distributor
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