Best performance with ultra-low consumption: Integrated LQ050XX load switch ICs from Littelfuse – now at Rutronik

03/14/2024 Product News

Equipped with state-of-the-art technology, Littelfuse's LQ050XX integrated load switch ICs offer the industry's highest performance with ultra-low power consumption. They make it possible to reduce parasitic leakage currents, improve system efficiency, and extend battery life. That means a real upgrade for a wide range of applications, e.g. in wearables, smart homes, or IoT devices. The ICs are available in five versions at

The integrated load switch ICs are available in different housing sizes from 0.77 mm x 0.77 mm x 0.46 mm to 0.97 mm x 1.47 mm x 0.55 mm. Their small size makes them particularly suitable for applications with limited space. The switches are robust, particularly power-saving and, thanks to the cutting-edge technology they contain, can deliver market-leading performance in terms of low quiescent current and switch-off current. In addition, they impress with low power losses and reduced leakage currents for extremely convincing efficiency.

The ICs are available in the following versions:


The load switch delivers 2 A rated power. The integrated slew rate control improves system reliability and reduces voltage fluctuations on the bus. Together with its outstanding efficiency, this makes it the ideal solution for applications such as IoT or wearables.


The IC has a high efficiency and the leading True Reverse Current Blocking (TRCB) technology. Together with a particularly low threshold voltage, the LQ05021RCS4 prevents reverse current when Vout exceeds Vin, minimizes power loss during operation, and offers an extremely low switch-off current. The switch is predestined for wearables, portable electrical devices, or IoT applications.


This switch is also equipped with slew rate control, which limits the inrush current and thus minimizes the voltage drop. The LQ05022QCS4 supports a wide input voltage range, which optimizes both the service life and the reliability of a system. The component can also be used in different voltage rails. Preferred applications include data storage, IoT devices, or low-power subsystems.


The LQ05041QCS6 has a rated power of 4 A. It has an integrated slew rate control and also a slew rate control. With six bumps and a size of 0.97 mm x 1.47 mm x 0.55 mm, it is particularly small and is primarily used in data storage, or the medical sector.


With its leading TRCB technology and extremely low threshold voltage, the switch prevents reverse currents and minimizes power loss during operation. Its main areas of application include portable devices and power-saving subsystems.

More application examples:

  • Smart home
  • Smart consumer products
  • Virtual Reality
  • Smart Metering
  • Medical Devices

Overview of specifications:

P/NPackageVoltage (V)Vmax (V)Current (A)Ron (mΩ)Iq (nA)Isd (nA)Rise Time (us)QOD (Ω)RCB
LQ05021QCS4CSP4 (0.77x0.77)1.1-5.5623411943085NA
LQ05021RCS4CSP4 (0.77x0.77)1.1-5.562374502057085Yes
LQ05022QCS4CSP4 (0.97x0.97)1.1-5.5623172833585NA
LQ05041QCS6CSP6 (0.97x1.47)1.1-5.5641535040085NA
LQ05041RCS4CSP6 (0.97x1.47)1.1-5.56414130040730NAYes


For more information to Littelfuse´s LQ050XX-ICs and a direct ordering option, please visit our e-commerce platform at

Contact Rutronik:
Joanna Widmann | Corporate Product Manager Power | +49 7231 801 1696 |

Upgrade for a variety of applications: The integrated load switches from Littelfuse