TCR3UG series

2022-01-11

© 2018-2022

Toshiba Electronic Devices & Storage Corporation

8

11.3. Attention in Use

●

Output Capacitors

Ceramic capacitors can be used for these devices. However, because of the type of the capacitors, there might be unexpected

thermal features. Please consider application condition for selecting capacitors. And Toshiba recommends the ESR of ceramic

capacitor is under 10

Ω. For stable operation, we recommend over 1 μF.

●

Mounting

The long distance between IC and input output capacitor might affect phase compensation by impedance in wire and inductor.

For stable power supply, input output capacitor need to mount near IC as much as possible. Also VIN and GND pattern need

to be large and make the wire impedance small as possible.

●

Permissible Loss

Please have enough design patterns for expected maximum permissible loss. And under consideration of ambient

temperature, input voltage, output current etc., we recommend proper dissipation ratings for maximum permissible loss; in

general maximum dissipation rating is 70 to 80 %.

●

Over current Protection and Thermal shutdown function

Over current protection and Thermal shutdown function are designed in these products, but these are not designed to

constantly ensure the suppression of the device within operation limits. Depending on the condition during actual usage, it

could affect the electrical characteristic specification and reliability. Also note that if output pins and GND pins are not

completely shorted out, these products might break down.

When using these products, please read through and understand the concept of dissipation for absolute maximum ratings

from the above mention or our ‘Semiconductor Reliability Handbook’. Then use these products under absolute maximum

ratings in any condition. Furthermore, Toshiba recommends inserting failsafe system into the design.