Datasheet
ENA
START ENA
ENA
1
V
R2
V V
V
I
R1 R3
=
-
+ -
START STOP
OUT
HYS
V V
R1
V
I
R3
-
=
+
EN
Ihys
VIN
+
-
TPS54140
R1
R2
VOUT
R3
I1
0.9 Am
2.9 Am
1.25V
TPS54140
www.ti.com
SLVS889B –OCTOBER 2008–REVISED SEPTEMBER 2013
DETAILED DESCRIPTION (continued)
Another technique to add input voltage hysteresis is shown in Figure 29. This method may be used, if the
resistance values are high from the previous method and a wider voltage hysteresis is needed. The resistor R3
sources additional hysteresis current into the EN pin.
Figure 29. Adding Additional Hysteresis
(4)
(5)
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