Datasheet TCR8BM (Toshiba) - 8

TCR8BM series Attention in Use
● Capacitors(Output, Input, and Bias Capacitor) 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. For stable operation, please use over 1.0 μF input capacitor, 0.1 μF bias capacitor and 2.2 μF output ceramic capacitor. ● Recommending for Control Pin Operation This device is optimized to operate the best performance when turn on and off with control pin. Especial y the rush current and bias current can be suppressed by using control pin after applying VIN and VBIAS. TCR8BMxxA products have VIN under voltage lockout function, bias current is suppressed at low VIN even when VBIAS and VCT are applied. ● Mounting The long distance between IC and output capacitor might affect phase compensation 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. ● Permissible Loss Please have enough design patterns for expected maximum permissible loss. And under consideration of ambient 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. ● 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 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. © 2018-2019 8 2019-01-15 Toshiba Electronic Devices & Storage Corporation