Datasheet

C2: EN = 2.00 V/div
C1: V
IN
= 10.00 V/div
C3: V
OUT
= 2.0 V/div
Time = 2.00 ms/div
Time = 500 µs/div
C2: EN = 2.00 V/div
C1: V
IN
= 10.00 V/div
C3: V
OUT
= 2.0 V/div
Test Setup and Results www.ti.com
2.11 Powering Down
The shutdown waveforms are shown in Figure 16 and Figure 17. In Figure 16, the top trace shows V
IN
, the
middle trace shows EN, and the bottom trace shows V
OUT
. The input voltage is removed, and when the
input falls below the undervoltage lockout threshold, the TPS54061 shuts down and the output falls to
ground. The input voltage for these plots is 24V with a 16Ω resistive load.
Figure 16. TPS54061EVM-142 Shutdown Relative to V
IN
In Figure 17, the top trace shows V
IN
, the middle trace shows EN, and the bottom trace shows V
OUT
. The
input voltage is held at 24V, and EN is shorted to ground. When EN is grounded, the TPS54061 is
disabled, and the output voltage discharges to ground. The input voltage for these plots is 24V with a 16Ω
resistive load.
Figure 17. TPS54061EVM-142 Shutdown Relative to EN
12
Evaluation Module for TPS54061 Synchronous Step-Down SWIFT SLVU721–May 2012
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