Current Mode Buck-Boost Converter


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The RT6150A/B is a high efficiency, fixed frequency, Buck-Boost DC-DC converter that operates from input voltages above, below or equal to the output voltage. The topology incorporated in the IC provides a continuous transfer function through all operating modes, making the product ideal for single lithium-ion, multi-cell alkaline or Ni-MH battery applications where the output voltage is within the battery voltage range.

The device includes two N-MOSFET switches and two P-MOSFET switches for high efficiency operation. Switching frequency is set at 1MHz to reduce the external component size. Quiescent current is only 60μA in Power Save Mode (PSM), maximizing battery life in portable applications. PSM operation is user controlled and can be enabled by driving the PS pin low. If the PS pin is driven high, then fixed frequency switching is enabled.

Other features include low shutdown current, internal soft-start control, thermal shutdown protection and current limit. The RT6150A is available in the WDFN-10L 3x3 package and the RT6150B is available in the WDFN-10L 2.5x2.5 package.


  • Portable Products
  • Handheld Instrumentation
Key Spec.
RT6150A RT6150B
Status Active Active
Vin (min) (V) 1.8 1.8
Vin (max) (V) 5.5 5.5
Vout (min) (V) 2.5 2.5
Vout (max) (V) 5.5 5.5
Iout (max) (A) 0.8 0.8
Current Limit (typ) (A) 1.6 1.6
Freq (typ) (kHz) 1000 1000
Freq (min) (kHz) 800 800
Freq (max) (kHz) 1200 1200
Ron_HS (typ) (mOhm) 150 150
Ron_LS (typ) (mOhm) 150 150
Iq (typ) (mA) 0.06 0.06
Features Current Mode Control;Enable Input;Internal Compensation;OCP Current Mode Control;Enable Input;Internal Compensation;OCP
Package Type WDFN3x3-10 WDFN2.5x2.5-10
  • Single Inductor
  • Fixed Frequency Operation with Battery Voltages
  • Synchronous Rectification : Up to 90% Efficiency
  • Up to 800mA Continuous Output Current
  • VOUT Disconnected from VIN during Shutdown
  • Power Save Mode (PSM) Enable Control
  • <1μA Shutdown Current
  • Input Voltage Range: 1.8V to 5.5V
  • Fixed 3.3V and Adjustable Output Voltage Options from 2.5V to 5.5V
  • 10-Lead WDFN Packages
  • RoHS Compliant and Halogen Free
TitleLast UpdateShareDownload
Current Mode Buck-Boost Converter2013/05/08
Technical Documents
TitleLast UpdateShareDownload
Richtek Selection Guide (Oct., 2021)2021/11/23
Power IC Solutions for IoT/Portable/Wearable/Battery-Powered Applications2021/10/28
Power Mangement Components for Lithium-Ion Battery Powered Applications2020/12/30
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT6150AGQWWDFN3x3-101500 Request Not available
RT6150AGQWWDFN3x3-101500 Request Buy from Distributor
RT6150B-33GQWWDFN2.5x2.5-101500 Not available Not available
RT6150BGQWWDFN2.5x2.5-101500 Not available Not available
RT6150BGQWWDFN2.5x2.5-103000 Not available Not available