Asia-Pacific
English
简体中文
繁體中文
한국어
日本語
Americas
English
Europe (EMEA)
English



Part Number Search

Cross Reference Search

About information presented in this cross reference

The information presented in this cross reference is based on TOSHIBA's selection criteria and should be treated as a suggestion only. Please carefully review the latest versions of all relevant information on the TOSHIBA products, including without limitation data sheets and validate all operating parameters of the TOSHIBA products to ensure that the suggested TOSHIBA products are truly compatible with your design and application.
Please note that this cross reference is based on TOSHIBA's estimate of compatibility with other manufacturers' products, based on other manufacturers' published data, at the time the data was collected.
TOSHIBA is not responsible for any incorrect or incomplete information. Information is subject to change at any time without notice.

Keyword Search

Parametric Search

Stock Check & Purchase

Innovation Centre

At the Toshiba Innovation Centre we constantly strive to inspire you with our technologies and solutions. Discover how to place us at the heart of your innovations.

2-4. Inrush current reducing

The inrush current limiting function controls the slew rate to reduce inrush current.
Once a load switch IC turns on, its output voltage increases instantaneously, causing overshoot that might exceed the rated voltage of the load IC or circuit.
In addition, a large inrush current flows into the load switch IC to charge the output smoothing capacitor connected to the VOUT pin. Inrush current occurs during the period from the time when the load switch IC turns on to the time when the output voltage stabilizes. If the VIN pin is connected with a board trace with large impedance, the input voltage might sag because of a voltage drop that occurs across the trace impedance due to inrush current. This makes the load switch IC unable to provide a normal output voltage level.
After the load switch IC turns on, the inrush current limiting function raises the output current slowly to limit the inrush current, thereby suppressing the output voltage overshoot and the input voltage drop. Therefore, inrush current limiting helps improve system stability.
Inrush current limiting is also called slew rate control or soft start.

Load switch IC without an inrush current limiting function
Load switch IC without an inrush current limiting function
Load switch IC with an inrush current limiting function
Load switch IC with an inrush current limiting function

The following links also provide descriptions of inrush current limiting:

Application note: Basics of Load Switch ICs

FAQ: How can I suppress inrush current with a load switch IC?

Chapter2 Convenient functions load switch ICs

2-1. Useful functions available with load switch ICs
2-2. Operation of overcurrent protection
2-3. Operation of thermal shutdown
2-5. Auto discharge
2-6. Undervoltage lockout (UVLO)
2-7. Reverse-current protection

Related information