TAR5S15U~TAR5S50U

2003-02-10

5

Application Note

1.

Recommended Application Circuit

The figure above shows the recommended configuration for using a point regulator. Insert a capacitor for

stable input/output operation.

If the control function is not to be used, Toshiba recommend that the control pin (pin 1) be connected to the

2.

Power Dissipation

The power dissipation for board-mounted TAR5SxxU Series devices (rated at 450 mW) is measured using a

board whose size and pattern are as shown below. When incorporating a device belonging to this series into

your design, derate the power dissipation as far as possible by reducing the levels of parameters such as input

voltage, output current and ambient temperature. Toshiba recommend that these devices should typically be

derated to 70%~80% of their absolute maximum power dissipation value.

Thermal Resistance Evaluation Board

Control Level

Operation

HIGH

ON

LOW

OFF

5

NOISE

4

1

3

GND

2

CONTROL

The noise capacitor should be connected to NOISE pin to GND for stable operation.

The recommended value is higher than 0.0047

µF.

Circuit board material: glass epoxy, Circuit board dimension:30 mm

× 30 mm,

Copper foil pad area: 35 mm

= 0.8 mm

CONTROL GND

NOISE