TCK104G,TCK105G

2014-03-01

6

Application Note

1.

Application circuit example (top view)

The figure below shows the recommended configuration for TCK104G and TCK105G

1) Input capacitor

recommended to use input capacitors to reduce voltage drop due to sharp changes in output current and also for

2) Output capacitor

there is a possibility of overshoot or undershoot caused by output load transient response, board layout and

recommended.

3) Control pin

A control pins for TCK104G and TCK105G are both Active High, which controls both the pass-through p-ch

MOSFET and the discharge n-ch MOSFET, operated by the control voltage and Schmitt trigger. When the control

voltage level is High, p-ch MOSFET is ON state and n-ch MOSFET is OFF state. When control voltage level is

Low, and the state of the MOSFETs is reversed. Also, pull down resistance equivalent to a few MΩis connected

between CONTROL and GND, thus the load switch IC is in OFF state even when CONTROL pin is OPEN. In

addition, CONTROL pin has a tolerant function such that it can be used even if the control voltage is higher than

the input voltage.

Control

voltage

IC

Operation

HIGH

ON

LOW

OFF

OPEN

OFF

GND

VIN

CONTROL

LOAD