Datasheet
VIN
R1
R2
Node
5.8V
10kohm
ENA
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
+
-
TPS54160
R1
R2
VOUT
R3
I1
0.9 Am
2.9 Am
1.25V
TPS54160
www.ti.com
SLVS795E –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)
Do not place a low-impedance voltage source with greater than 5 V directly on the EN pin. Do not place a
capacitor directly on the EN pin if V
EN
> 5 V when using a voltage divider to adjust the start and stop voltage.
The node voltage, (see Figure 30) must remain equal to or less than 5.8 V. The zener diode can sink up to 100
µA. The EN pin voltage can be greater than 5 V if the V
IN
voltage source has a high impedance and does not
source more than 100 µA into the EN pin.
Figure 30. Node Voltage
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