6A, 2MHz, High Efficiency Synchronous Step-Down Converter


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The RT8073 is a high efficiency PWM step-down converter and capable of delivering 6A output current over a wide input voltage range from 2.9V to 5.5V.

The RT8073 provides accurate regulation for a variety of loads with an ±1% reference voltage at room temperature. For reducing inductor size, it provides up to 2MHz switching frequency. The efficiency is maximized through the integrated 50mΩ for high side, 35mΩ for low side MOSFETs and 250μA typical supply current.

The RT8073 features over current protection, frequency fold back function in shorted circuit, hiccup mode under voltage protection and over temperature protection.

The RT8073 is available in SOP-8 (Exposed Pad) and WDFN-12L 3x3 packages.


  • Low Voltage, High Density Power Systems
  • Distributed Power Systems
  • Point-of-Load Conversions
  • LCD TV
Key Spec.
Status Active
Vin (min) (V) 2.9
Vin (max) (V) 5.5
Number of Outputs 1
Vout (min) (V) 0.8
Output Adj. Method Resistor
Iout (max) (A) 6
Current Limit (typ) (A) 9
Freq (typ) (kHz) 1400
Freq (min) (kHz) 300
Freq (max) (kHz) 2000
Ext Sync No
Ron_HS (typ) (mOhm) 50
Ron_LS (typ) (mOhm) 35
Iq (typ) (mA) 0.25
Features Adjustable Frequency;Adjustable Soft-Start;Current Mode Control;Enable Input;OCP;PSM;Power Good;Stable with Ceramic Capacitor;UVP
Package Type PSOP-8;WDFN3x3-12
  • Integrated 50mΩ and 35mΩ MOSFETs
  • 6A Output Current
  • High Efficiency Up to 95%
  • 2.9V to 5.5V Input Range
  • Adjustable PWM Frequency : 300kHz to 2MHz
  • 0.8V ±1% Reference Voltage
  • Adjustable External Soft-Start
  • Power Good Indicator (WDFN-12L 3x3 only)
  • Over Current Protection
  • Under Voltage Protection
  • Over Temperature Protection
  • SOP-8 (Exposed Pad) and 12-Lead WDFN Packages
  • RoHS Compliant and Halogen Free
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6A, 2MHz, High Efficiency Synchronous Step-Down Converter2012/08/31
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Reference Design
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Richtek Load Transient Tool2021/01/21
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT8073GSPPSOP-82500 Not available Buy from Distributor