SLPA021 November   2024 CSD13303W1015 , CSD16301Q2 , CSD16321Q5 , CSD16322Q5 , CSD16323Q3 , CSD16325Q5 , CSD16327Q3 , CSD16340Q3 , CSD16342Q5A , CSD16401Q5 , CSD16403Q5A , CSD16404Q5A , CSD16406Q3 , CSD16407Q5 , CSD16408Q5 , CSD16409Q3 , CSD16410Q5A , CSD16411Q3 , CSD16412Q5A , CSD16413Q5A , CSD16414Q5 , CSD16415Q5 , CSD16556Q5B , CSD17301Q5A , CSD17302Q5A , CSD17303Q5 , CSD17304Q3 , CSD17305Q5A , CSD17306Q5A , CSD17307Q5A , CSD17308Q3 , CSD17309Q3 , CSD17310Q5A , CSD17311Q5 , CSD17312Q5 , CSD17313Q2 , CSD17322Q5A , CSD17327Q5A , CSD17381F4 , CSD17501Q5A , CSD17505Q5A , CSD17506Q5A , CSD17507Q5A , CSD17510Q5A , CSD17522Q5A , CSD17527Q5A , CSD17551Q3A , CSD17551Q5A , CSD17552Q3A , CSD17552Q5A , CSD17553Q5A , CSD17555Q5A , CSD17556Q5B , CSD17559Q5 , CSD18501Q5A , CSD18502KCS , CSD18502Q5B , CSD18503KCS , CSD18503Q5A , CSD18504KCS , CSD18504Q5A , CSD18531Q5A , CSD18532KCS , CSD18532NQ5B , CSD18532Q5B , CSD18533KCS , CSD18533Q5A , CSD18534KCS , CSD18534Q5A , CSD18537NKCS , CSD18537NQ5A , CSD18563Q5A , CSD22202W15 , CSD25211W1015 , CSD25213W10 , CSD75207W15 , CSD86311W1723 , CSD86330Q3D , CSD86350Q5D , CSD86360Q5D , CSD87312Q3E , CSD87330Q3D , CSD87331Q3D , CSD87350Q5D , CSD87351Q5D , CSD87351ZQ5D , CSD87352Q5D , CSD87353Q5D , CSD87381P , CSD87588N

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Review the Data Sheet Limits
  6. 3Application-specific FETs
  7. 4Gate Drive Voltage Specifications
    1. 4.1 Absolute maximum VGS
    2. 4.2 Gate-to-source Threshold Voltage, VGS(th)
  8. 5High-side and Low-side Switches
    1. 5.1 Driving a High-side N-channel FET
    2. 5.2 Driving a Low-side N-channel FET
    3. 5.3 Driving a High-side P-channel FET
  9. 6Use a Gate-to-source Resistor
  10. 7Lowest RDS(on)≠ Lowest Power Loss
  11. 8Summary
  12. 9References

5.1 Driving a High-side N-channel FET

The gate of a high-side N-channel FET must to be driven to a voltage higher than the input by at least the minimum value of VGS where RDS(on) is specified in the data sheet. This is because the drain and source are at approximately the same voltage when the FET is on and VGS = VG – VS = VG – VIN. For example, when using the CSD18541F5 as a high switch with VIN = 24V, VG≥ VIN + VGS(min) = 24V + 4.5V = 28.5V.