The RT8079A is a high efficiency step-down converter and capable of delivering 3A output current over a wide input voltage range from 2.95V to 6V.

The RT8079A provides accurate regulation for a variety of loads with ±3% accuracy. For reducing inductor size, it provides up to 2MHz switching frequency. The efficiency is maximized through the integrated 45mΩ MOSFETs and 550μA typical supply current.

Under voltage lockout voltage of the RT8079A is 2.7V, and it also provides external setting by a resistor network on the enable pin.

The RT8079A provides protections such as inductor current limit under voltage lockout and thermal shutdown. The over temperature threshold is 145°C.

The RT8079A is available in WQFN-16L 3x3 package.


  • Low-Voltage, High-Density Power Systems
  • Distributed Power Systems
  • Point-of-Load Conversions
Key Spec.
Status Active
Vin (min) (V) 2.95
Vin (max) (V) 6
Number of Outputs 1
Vout (min) (V) 0.827
Vout (max) (V) 3.6
Output Adj. Method Resistor
Iout (max) (A) 3
Current Limit (typ) (A) 6.6
Freq (min) (kHz) 300
Freq (max) (kHz) 2000
Ext Sync Yes
Ron_HS (typ) (mOhm) 45
Ron_LS (typ) (mOhm) 42
Iq (typ) (mA) 0.55
Features Adjustable Frequency;Adjustable Soft-Start;Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;External Synchronization;OCP;OTP;PSM;Power Good;Stable with Ceramic Capacitor
Package Type WQFN3x3-16
  • Integrated 45mΩ MOSFETs
  • Input Range : 2.95V to 6V
  • Adjustable PWM Frequency : 300kHz to 2MHz
  • Output Current : 3A
  • 95% Efficiency
  • Adjustable Soft-Start
  • Power Good Indicator
  • Enable Control
  • Under Voltage Lockout
  • Current Limit
  • Thermal Shutdown
  • 16-Lead WQFN Package
  • RoHS Compliant and Halogen Free
  • FCCM Mode at Light Loading (RT8079A) and Pulse Skip Mode (RT8079)
TitleLast UpdateDownload
2.95V to 6V Input, 3A Output, 2MHz, Synchronous Step-Down Converter2012/09/26
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
RT8079AGQWWQFN3x3-161500 Request Buy from Distributor