The RTQ9740A is a small, ultra-low RON, dual channel load switch with EN controlled pin. The product contains two N-MOSFETs that can operate between an input voltage range of 0.8V to 5.5V. Also, it supports a maximum continuous current of 6A each channel. Each switch is independently controlled by EN pins (EN1 and EN2), which can directly interface with low-voltage control signals.

The RTQ9740A is available in the WDFN-14TL 3x2 package with exposed pad for high power and heat dissipation.


  • UltrabookTM
  • Notebooks/Netbooks
  • Tablet PC
  • Consumer Electronics
  • Set-Top Boxes/Residential Gateways
  • Telecom Systems
  • Solid State Drives (SSD)
Key Spec.
Status Active
Number of Outputs 2
Vin (min) (V) 0.8
Vin (max) (V) 5.5
Ron (typ) (mOhm) 22
Iq (typ) (mA) 0.055;0.075
FLAG Indicator No
Iocp Adjustable No
Switch Type Load Switch
Features Adjustable Soft-Start;Enable Input
Package Type WDFN3x2-14T
  • Integrated Dual Channel Load Switch
  • Input Voltage Range : 0.8V to 5.5V
  • Ultra-Low RON Resistance
    ► RON = 22mΩ at VIN = 5V (VDD = 5V)
    ► RON = 21mΩ at VIN = 3.3V (VDD = 5V)
    ► RON = 21mΩ at VIN = 1.8V (VDD = 5V)
  • 6A Maximum Continuous Switch Current Per Channel
  • Low Quiescent Current
    ► 75μA (Both Channels)
    ► 55μA (Single Channel)
  • Low Control Input Threshold Enables Use of 1.4V/1.8V/2.5V/3.3V Logics
  • Configurable Rise Time
  • Quick Output Discharge (QOD)
  • Adaptive Discharge Current
  • 14T-Lead WDFN Package with Thermal Pad
  • RoHS Compliant and Halogen Free
TitleLast UpdateDownload
Dual Channel, Ultra-Low Resistance Load Switch2016/09/14
Technical Documents
TitleItem TypeLast UpdateDownload
Richtek Product Selection Guide [Jan., 2024] Selection Guide2024/01/18