TCR3DF series

2013-11-15

6

Attention in Use

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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

recommend the ESR of ceramic capacitor is under 10 Ω.

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Mounting

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

For stable power supply, 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.

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Permissible Loss

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

surrounding temperature, input voltage, and output current etc, we recommend proper dissipation ratings for

maximum permissible loss; in general maximum dissipation rating is 70 to 80 percent.

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Over current Protection and Thermal shut down function

Over current protection and Thermal shut down 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 be 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 recommend inserting failsafe system into the

design.