Datasheet

V
OUT
V
IN
Schottky
LP2985
LP2985
SLVS522N –JULY 2004–REVISED JUNE 2011 www.ti.com
is forward biased and can cause a parasitic silicon-controlled rectifier (SCR) to latch, resulting in high current
flowing from the output to the input. Thus, to prevent possible damage to the regulator in any application where
the output may be pulled above the input, an external Schottky diode should be connected between the output
and input. With the anode on output, this Schottky limits the reverse voltage across the output and input pins to
∼0.3 V, preventing the regulator’s internal diode from forward biasing.
16 Copyright © 2004–2011, Texas Instruments Incorporated