3A, 17V Current Mode Synchronous Step-Down Converter


Update Alert Share

The RT7296C is a high-efficiency, 3A current mode synchronous step-down DC/DC converter with a wide input voltage range from 4.5V to 17V. The device integrates 80mΩ high-side and 30mΩ low-side MOSFETs to achieve high efficiency conversion. The current mode control architecture supports fast transient response and internal compensation. A cycle-by-cycle current limit function provides protection against shorted output. The RT7296C provides complete protection functions such as input under-voltage lockout, output under-voltage protection, over-current protection, and thermal shutdown. The PWM frequency is adjustable by the EN/SYNC pin. The RT7296C is available in the TSOT-23-8 (FC) package.


  • Industrial and Commercial Low Power Systems
  • Computer Peripherals
  • LCD Monitors and TVs
  • Set-top Boxes
Key Spec.
Status Active
Vin (min) (V) 4.5
Vin (max) (V) 17
Number of Outputs 1
Vout (min) (V) 0.807
Vout (max) (V) 12
Output Adj. Method Resistor
Iout (max) (A) 3
Current Limit (typ) (A) 5
Freq (typ) (kHz) 1400
Freq (min) (kHz) 300
Freq (max) (kHz) 3000
Ext Sync Yes
Ron_HS (typ) (mOhm) 80
Ron_LS (typ) (mOhm) 30
Iq (typ) (mA) 0.8
Features Adjustable Soft-Start;Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;External Synchronization;Force PWM;Internal Compensation;OCP;OTP;Stable with Ceramic Capacitor;UVP
Package Type TSOT-28(FC)
  • 4.5V to 17V Input Voltage Range
  • 3A Output Current
  • Internal N-Channel MOSFETs
  • Current Mode Control
  • Fixed Switching Frequency : 1.4MHz
  • Synchronous to External Clock : 300kHz to 3MHz
  • Cycle-by-Cycle Current Limit
  • External Soft-Start Function
  • Input Under-Voltage Lockout
  • Output Under-Voltage Protection
  • Thermal Shutdown
TitleLast UpdateShareDownload
3A, 17V Current Mode Synchronous Step-Down Converter2015/06/02
Technical Documents
TitleLast UpdateShareDownload
Richtek Selection Guide [Oct., 2020]2020/12/30
TitleLast UpdateShareViews
How to estimate control loop bandwidth from the transient response time?2017/03/30 1378
Reference Design
TitleLast UpdateShareDownload
Richtek Load Transient Tool2021/01/21
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT7296CGJ8FTSOT-28(FC)3000 Request Buy from Distributor