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The RT8270 is an asynchronous high voltage buck converter that can support the input voltage range from 4.75V to 22V and the output current can be up to 2A. Current Mode operation provides fast transient response and eases loop stabilization.
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 RT8270 is available in a SOP-8 surface mount package.

Applications

  • Distributive Power Systems
  • Battery Charger
  • DSL Modems
  • Pre-regulator for Linear Regulators
Key Spec.
RT8270
Status Active
Vin (min) (V) 4.75
Vin (max) (V) 22
Number of Outputs 1
Vout (min) (V) 1.222
Vout (max) (V) 16
Output Adj. Method Resistor
Iout (max) (A) 2
Current Limit (typ) (A) 3
Freq (typ) (kHz) 1200
Ext Sync No
Ron_HS (typ) (mOhm) 180
Iq (typ) (mA) 0.7
Features Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;Force PWM;OCP;OTP;Stable with Ceramic Capacitor;UVP
Package Type SOP-8
Features
  • Wide Operating Input Range : 4.75V to 22V
  • Adjustable Output Voltage Range : 1.222V to 16V
  • Output Current up to 2A
  • 25μA Low Shutdown Current
  • Power MOSFET : 0.18Ω
  • High Efficiency up to 95%
  • 1.2MHz Fixed Switching Frequency
  • Stable with Low ESR Output Ceramic Capacitors
  • Thermal Shutdown Protection
  • Cycle-By-Cycle Over Current Protection
  • RoHS Compliant and Halogen Free
Datasheet
TitleLast UpdateDownload
2A, 22V, 1.2MHz Step-Down Converter2015/04/29
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
Please confirm with our distributor or sales representative for actual stock status.
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