The RT7247C is a high efficiency, monolithic synchronous step-down DC/DC converter that can deliver up to 2A output current from a 4.5V to 18V input supply. The RT7247C's current mode architecture and external compensation allow the transient response to be optimized over a wide input range and loads. Cycle-by-cycle current limit provides protection against shorted outputs, and soft-start eliminates input current surge during start-up. The RT7247C also provides under voltage protection and thermal shutdown protection. The low current (<3µA) shutdown mode provides output disconnection, enabling easy power management in battery-powered systems. The RT7247C is available in an SOP-8 (Exposed Pad) package.


  • Wireless AP/Router
  • Set-Top-Box
  • Industrial and Commercial Low Power Systems
  • LCD Monitors and TVs
  • Green Electronics/Appliances
  • Point of Load Regulation of High-Performance DSPs
Key Spec.
Status Active
Vin (min) (V) 4.5
Vin (max) (V) 18
Number of Outputs 1
Vout (min) (V) 0.8
Vout (max) (V) 12
Output Adj. Method Resistor
Iout (max) (A) 2
Current Limit (typ) (A) 5.1
Freq (typ) (kHz) 800
Ext Sync No
Ron_HS (typ) (mOhm) 150
Ron_LS (typ) (mOhm) 130
Iq (typ) (mA) 0.8
Features Adjustable Soft-Start;Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;Force PWM;OCP;OTP;Stable with Ceramic Capacitor;UVP
Package Type PSOP-8
  • ±1.5% High Accuracy Reference Voltage
  • 4.5V to 18V Input Voltage Range
  • 2A Output Current
  • Integrated N-MOSFET Switches
  • Current Mode Control
  • Fixed Frequency Operation : 800kHz
  • Output Adjustable from 0.8V to 12V
  • Stable with Low ESR Ceramic Output Capacitors
  • Up to 95% Efficiency
  • Programmable Soft-Start
  • Cycle-by-Cycle Over Current Limit
  • Input Under Voltage Lockout
  • Output Under Voltage Protection
  • Thermal Shutdown Protection
  • RoHS Compliant and Halogen Free
TitleLast UpdateShareDownload
2A, 18V, 800kHz Synchronous Step-Down Converter2012/02/22
Technical Documents
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DC/DC Converter Testing with Fast Load Transient2022/11/29
Richtek Selection Guide [Oct., 2022]2022/11/03
TitleLast UpdateShareViews
How to estimate control loop bandwidth from the transient response time?2017/03/30 1609
Evaluation Boards
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RT7247CHGSP Evaluation Board2021/01/21
Reference Design
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Richtek Load Transient Tool2022/07/25
Design Tool
TitleLast UpdateShare
Richtek Designer™ Web Simulation Tool : RT7247CHGSP2022/04/22
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT7247CHGSPPSOP-82500 Request Not available
RT7247CHGSPPSOP-82500 Request Buy from Distributor