S5JGS1581D_15 Datasheet, PDF (8/8 Pages) SeCoS Halbleitertechnologie GmbH – Dual Input Dropout Regulators

Elektronische Bauelemente
S5JGS1581D / S5JGS1581D-25
5-Terminal
Dual Input Dropout Regulators
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 V_OUT pin and V_POWER
pin is not usually needed. Microsecond surge currents of 50A ~ 100A can be handled by the internal diode
between the Output pin and V_POWER 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 V_POWER 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.
http://www.SeCoSGmbH.com/
20-Dec-2011 Rev. A
Any changes of specification will not be informed individually.
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