The RT2101A 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 RT2101A provides accurate regulation for a variety of loads with ±2.5% 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 RT2101A is 2.7V, and it also provides external setting by a resistor network on the enable pin.

The RT2101A provides protections such as inductor current limit under-voltage lockout and thermal shutdown. The over-temperature threshold is 145°C.The RT2101A 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) 7
Freq (typ) (kHz) 1000
Freq (min) (kHz) 700
Freq (max) (kHz) 2000
Ext Sync Yes
Ron_HS (typ) (mOhm) 45
Ron_LS (typ) (mOhm) 42
Iq (typ) (mA) 0.55
Features AEC-Q100;Adjustable Frequency;Adjustable Soft-Start;Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;External Synchronization;OCP;OTP;Power Good
Package Type WQFN3x3-16
  • AEC-Q100 Grade 2 Qualified
  • Integrated 45mΩ MOSFETs
  • Input Range : 2.95V to 6V
  • Adjustable PWM Frequency : 700kHz to 2MHz
  • Output Current : 3A
  • 95% Efficiency
  • Adjustable Soft-Start
  • Power Good Indicator
  • Enable Control
  • Under-Voltage Lockout
  • Current Limit
  • Thermal Shutdown
TitleLast UpdateDownload
2.95V to 6V Input, 3A Output, 2MHz, Synchronous Step-Down Converter2014/12/04
Evaluation Boards
TitleLast UpdateDownload
RT2101AGQW Evaluation Board2021/01/21
Reference Design
TitleLast UpdateDownload
Richtek Load Transient Tool2022/07/25
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT2101AGQWWQFN3x3-161500 Request Buy from Distributor