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| LP2980-ADJ_15 Datasheet, PDF (10/18 Pages) Texas Instruments – LP2980-ADJ Micropower 50 mA Ultra Low-Dropout Adjustable Voltage Regulator in SOT-23 | |||
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LP2980-ADJ
SNVS001E â APRIL 2000 â REVISED APRIL 2013
www.ti.com
ON/OFF INPUT OPERATION
The LP2980-ADJ is shut off by driving the ON/OFF input low, and turned on by pulling the ON/OFF input high. If
this feature is not to be used, the ON/OFF input must be tied to VIN to keep the regulator output on at all times
(the ON/OFF input must not be left floating).
To ensure proper operation, the signal source used to drive the ON/OFF input must be able to swing above and
below the specified turn-on/turn-off voltage thresholds which specify an ON or OFF state (see Electrical
Characteristics).
It is also important that the turn-on (and turn-off) voltage signals applied to the ON/OFF input have a slew rate
which is greater than 40 mV/μs.
IMPORTANT: The ON/OFF function will not operate correctly if a slow-moving signal is used to drive the
ON/OFF input.
10
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