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Example 2: 24-V to 12-V and 24-V to 5-V
++
V
OUT
(5 V/div)
V
IN
= 24 V
I
OUT
= 2 A
T − Time − 10 ns / div
V
OUT
(5 V/div)
V
IN
= 24 V
I
OUT
= 2 A
T − Time − 10 ns / div
TPS54383 , , TPS54386
SLUS774B – AUGUST 2007 – REVISED OCTOBER 2007
For a higher input voltage, both a snubber and bootstrap resistors are added to reduce ringing on the switch
node and a 30 V schottky diode is selected. A higher resistance feedback network is chosen for the 12 V output
to reduce the feedback current.
Figure 46. 24-V to 12-V and 24-V to 5-V Using the TPS54383
Figure 47. Switch Node Ringing Without Snubber and Figure 48. Switch Node Ringeing With Snubber and
Boost Resistor Boost Resistor
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Product Folder Link(s): TPS54383 TPS54386