Revision 1/4/2010

Preliminary and all contents are subject to change without prior notice.

© Seaward Electronics, Inc., 2006. • www.seawardinc.com.cn • Page 6

Application Hints

Like any Low dropout regulator, SE5167 requires

external capacitors to ensure stability. The external

capacitors must be carefully selected to ensure the

performances.

Input Capacitor:

An Input Capacitor of at least 2.2uF is required. The

inexpensive Electrolytic capacitor is preferred. The

value can be increased without upper limit.

Output Capacitor:

An Output Capacitor is required for look stability. It

must be located no more than 1cm away from the

GND pins. The inexpensive Electrolytic capacitor is

recommended. The minimum value is 2.2uF but

once again its value can be increased without limit.

Thermal Consideration

It is important that the thermal limit of the package

should not be exceeded. The SE5167 has built-in

thermal protection. When the thermal limit is

will be reset to zero. The power dissipation for a

given application can be calculated as follows:

The thermal limit of the package is then limited to

around 250°C/W for SE5167. SE5167 is designed

to enter thermal protection at 150°C. For example, if