The capacitance of ceramic capacitors can vary by as much as 20-30% from the rated value depending on the DC bias, temperature, and radial characteristics. This can result in output oscillation. Therefore, it is imperative to select a capacitor that possesses sufficient margin based on environmental conditions and set requirements.
o B/X5R/X7R characteristics
o High voltage resistance relative to supply voltage
Capacitors possessing the above two characteristics typically will not lose capacitance and should be used. For more detailed information, please contact the relevant manufacturer.

Tantalum capacitors can also be used. However, to ensure stable operation during temperature fluctuations a capacitor with low ESR must be selected. Therefore, when choosing a tantalum capacitor please refer to the SOA (Safe Operating Area) listed in the specifications to guarantee proper operation.

At temperatures above 125°C. Once Tjmax exceeds 125°C the TSD circuit will activate to protect the IC from damage. It is strongly recommended that the IC NOT be used at temperatures where the TSD circuit will operate.

The heat sink is connected to internal Ground, so leaving it open should not pose any problems. However, we recommend shorting it to Ground, since the ratio of copper foil is large, which will improve thermal dissipation. Regardless, please DO not connect the heat sink to anything other than Ground.

The NC pins are not connected internally, and can therefore be connected to Ground, left open, or attached to another potential without causing problems.

When the standby voltage exceeds the supply voltage V_IN current will flow through an internal protection diode between the standby and V_IN blocks, possibly resulting in damage depending on the amount of current. Therefore, please ensure that the standby voltage never exceeds V_IN. However, the exception is the BUxxTA2WNVX series, which does not have a protection diode between standby and V_IN.

Input-Output Voltage Difference V_SAT = Input Voltage V_IN - Output Voltage V_OUT, or V_IN = V_OUT + V_SAT In other words, the minimum input voltage that can still output the required V_OUT (including the saturation voltage) should be calculated in order to minimize V_SAT. The input-output voltage difference will vary depending on the output current. Therefore, the maximum current should be verified. Please refer to the 'Output Current Iout-Input/Output Voltage Difference V_SAT' graph located in the technical notes for more information.

This refers to a special function that switches from high performance to low power consumption modes and vice versa depending on output current fluctuation.

Setting the SEL terminal to either Open or Low will enable the auto power save function.
For example, an output current of 3mA will activate high performance mode. If the output current drops below 0.3mA the mode will switch to low power consumption with a circuit current of 2uA. Conversely, if the output current increases above 1.2mA operation will switch to high performance mode. In addition, if the SEL terminal is at 1.5V or greater the unit will operate in high performance mode.

The Pd values listed in the specifications were determined when measured on a 70mmx70mmx1.6mm glass epoxy board. Since the thermal dissipation characteristics will vary based on a number of factors including the substrate size, number of layers, substrate material, and copper foil area, measuring Pd using an actual application board is highly recommended.