Ultralow Quiescent and Leakage


  • Ultra-low leakage and quiescent current
  • No bias power rail required
  • Soft switching to minimize turn on in rush current
  • Reverse blocking at switch off state

Vishay have seen a strong growth for the design in of ultra-low quiescent smart load switches in remote wireless sensors, IoT, and medical applications.  

The SiP32431 is a part optimized for the above mentioned applications and has superior low IQ vs competition.  SiP32431 maximum IQ is 50% lower, and the typical value is over 99% lower.

Used in market applications such as wireless sensor network, smart meters, wearable, internet of things, healthcare devices, security systems, PMP, GPS, DSC.


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Vishay introduces the SiP32431 an ultra low leakage and quiescent current slew rate controlled high side switch with reverse blocking capability. The switch is of a low ON resistance p-channel MOSFET that supports continuous current up to 1 A. The SiP32431 operates with an input voltage from 1.5 V to 5.5 V. The SiP32431 features low Input logic level to interface with low control voltage from microprocessors.

This device has a very low operating current, typically 10 pA at 3.3 V power supply. The SiP32431 is available in lead (Pb)-free package options including 6 pin SC70-6, and 4 pin TDFN4 1.2 mm x 1.6 mm DFN4 packages. The operation temperature range is specified from -40 °C to +85 °C. The SiP32431 compact package options, operation voltage range, and low operating current make it a good fit for battery power applications.

Key Features and Advantages

  • 1.5 V to 5.5 V input voltage range
  • VIN quiescent current = 0.01 nA
  • VIN shutdown leakage = 0.20 nA
  • Guaranteed 100nA/max over temperature
  • Low on-resistance RDS(on):
  • Typically 105 mΩ at 5 V and 135 mΩ at 3 V. for TDFN4
  •     1.2 mm x 1.6 mm package.
  • Typical 147 mΩ at 5 V and 178 mΩ at 3 V
  •     for SC70-6 package
  • Slew rate controlled turn-on time: 100 μs
  • SC70-6 and TDFN4 1.2 mm x 1.6 mm packages
  • Wireless sensor network
  • Smart meters
  • Wearable
  • Internet of things
  • Healthcare Devices
  • Security systems