The RT6200 is a high voltage Buck converter that can support the input voltage range from 4.5V to 36V and the output current can be up to 0.6A. Current mode operation provides fast transient response and eases loop stabilization.

The chip also provides protection functions such as cycle-by-cycle current limit and thermal shutdown protection. The RT6200 is available in the SOT-23-6 package.


  • Distributed Power Systems
  • Battery Chargers
  • Pre-Regulator for Linear Regulators
  • WLED Drivers
Key Spec.
Status Active
Vin (min) (V) 4.5
Vin (max) (V) 36
Number of Outputs 1
Vout (min) (V) 0.8
Vout (max) (V) 15
Output Adj. Method Resistor
Iout (max) (A) 0.6
Current Limit (typ) (A) 1.2
Freq (typ) (kHz) 1200
Ext Sync No
Ron_HS (typ) (mOhm) 350
Iq (typ) (mA) 0.55
Features Built-in Bootstrap Switch;Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;OCP;Stable with Ceramic Capacitor
Package Type SOT-26
  • Wide Operating Input Voltage Range : 4.5V to 36V
  • Adjustable Output Voltage Range : 0.8V to 15V
  • 0.6A Output Current
  • 0.35Ω Internal Power MOSFET Switch
  • High Efficiency up to 95%
  • 1.2MHz Fixed Switching Frequency (Duty <90%)
  • Support duty up to 95%
  • Stable with Low ESR Output Ceramic Capacitors
  • Thermal Shutdown
  • Cycle-By-Cycle Over-Current Protection
TitleLast UpdateShareDownload
0.6A, 36V, 1.2MHz Step-Down Converter2014/02/14
Technical Documents
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Multi-Source Power Management Design2022/04/26
Powering Microcontrollers from Industrial Supply Rails2014/05/02
TitleLast UpdateShareViews
How to estimate control loop bandwidth from the transient response time?2017/03/30 1611
Evaluation Boards
TitleLast UpdateShareDownload
RT6200GE Evaluation Board2021/01/21
Reference Design
TitleLast UpdateShareDownload
Richtek Load Transient Tool2022/07/25