Datasheet

www.ti.com Enable Function
Figure 2. 250 mA to 800 mA Load Transient Response
6 Enable Function
ON/OFF control is provided by supplying a logic level signal to the Enable pin. A minimum V
EN
value of
1.2V is typically required at this pin to enable the LDO output. The LDO output will be shutdown when the
V
EN
value is typically 0.6V or less. The V
EN
threshold incorporates approximately 100 mV of hysteresis.
Figure 3. V
OUT
vs V
EN
In applications where the LP38511MR-ADJ is operated continuously the Enable pin can be connected
directly to V
IN
. The Enable pin has no default bias and must not be left floating. The Enable pin must be
actively driven to the appropriate voltage level.
3
SNVA311B–March 2009–Revised April 2013 AN-1770 LP38511MR-ADJ Evaluation Board
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