GS1581D datasheet(8/8 Pages) SECOS

8 / 8 page

S5JGS1581D / S5JGS1581D-25

5-Terminal

Dual Input Dropout Regulators

Elektronische Bauelemente

20-Dec-2011 Rev. A

Page 8 of 8

http://www.SeCoSGmbH.com/

Any changes of specification will not be informed individually.

PROTECTION DIODES

In normal operation S5JGS1581D family does not need any protection diodes between the adjustment pin

and the output to the input to prevent die overstresses. Internal resistors are limiting the internal current paths on

the ADJ pin. Therefore even with bypass capacitors on the adjust pin no protection diode is needed to ensure

device safety under short-circuit conditions. S5JGS1581D The adjust pin can be driver on a transient basis ±7V

with respect to the output with out any device degradation. A protection diode between the VOUT pin and VPOWER

pin is not usually needed. Microsecond surge currents of 50A ~ 100A can be handled by the internal diode

between the Output pin and VPOWER pin of the device. In normal operations it is difficult to get those values of

surge currents even with the use of large output capacitance. Only with high value output capacitors, such as

1000µF ~ 5000µF and the VPOWER pin are instantaneously shorted to ground, damage can occur. A diode from

output to input is recommended (Figure5).

If S5JGS1581D is connected as a single supply device with the control and power input pins shorted

together the internal diode between the output and the power input pin will protect the control input pin.

GS1581D Datasheet(PDF) 8 Page - SeCoS Halbleitertechnologie GmbH