High Voltage Synchronous Rectified Buck MOSFET Driver for Notebook Computer


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The RT9610B is a high frequency, dual MOSFET driver specifically designed to drive two power N-MOSFETS in a synchronous-rectified buck converter topology. It is especially suited for mobile computing applications that require high efficiency and excellent thermal performance. This driver, combined with Richtek's series of multi-phase Buck PWM controllers, provides a complete core voltage regulator solution for advanced microprocessors.

The drivers are capable of driving a 3nF load with fast rising/falling time and fast propagation delay. This device implements bootstrapping on the upper gates with only a single external capacitor. This reduces implementation complexity and allows the use of higher performance, cost effective, N-MOSFETs. Adaptive shoot through protection is integrated to prevent both MOSFETs from conducting simultaneously. The RT9610B is available in WDFN-8L 2x2 package.


  • Core Voltage Supplies for Intel® / AMD® Mobile Microprocessors
  • High Frequency Low Profile DC-DC Converters
  • High Current Low Output Voltage DC-DC Converters
  • High Input Voltage DC-DC Converters
Key Spec.
Status Active
Number of Channels 1
Vcc (typ) (V) 5
UGATE Rise Time (typ) (ns) 8
UGATE Fall Time (typ) (ns) 8
LGATE Rise Time (typ) (ns) 8
LGATE Fall Time (typ) (ns) 4
UGATE Source Resistance (typ) (Ohm) 1
UGATE Sink Resistance (typ) (Ohm) 1
LGATE Source Resistance (typ) (Ohm) 1
LGATE Sink Resistance (typ) (Ohm) 0.5
Disable Pin No
Built-In Bootstrap Diode No
Iq (typ) (mA) 0.08
Features Tri-State Input
Package Type WDFN2x2-8
  • Drives Two N-MOSFETs
  • Adaptive Shoot-Through Protection
  • 0.5Ω On-Resistance, 4A Sink Current Capability
  • Supports High Switching Frequency
  • Tri-State PWM Input for Power Stage Shutdown
  • Output Disable Function
  • Integrated Boost Switch
  • Low Bias Supply Current
  • VCC POR Feature Integrated
  • Small 8-Lead WDFN Package
  • RoHS Compliant and Halogen Free
TitleLast UpdateShareDownload
High Voltage Synchronous Rectified Buck MOSFET Driver for Notebook Computer2015/02/05
Technical Documents
TitleLast UpdateShareDownload
Richtek Selection Guide [Oct., 2020]2020/12/30