Datasheet

Example 3: Multiphase 12 V to 5.0 V at 6 A
0 3
1
64 7
I
LOAD
– Load Current – A
10
0
30
20
100
h – Efficiency – %
60
50
80
70
40
90
V
OUT
= 5 V
2 5
TPS55383 , , TPS55386
SLUS818 – SEPTEMBER 2008 ......................................................................................................................................................................................... www.ti.com
The combination of current mode control and a transconductance amplifier allows the TPS55386 to serve as a
single-output 2-phase supply. This configuration allows this part to serve as a 6-A non-synchronous converter at
an effective 1.2 MHz. COMP2 is connected to COMP1 and FB2 is connected to BP. While not implemented in
this example, EN2 could be used to disable Channel 2 at light load, improving efficiency.
Figure 39. Design Example 3, TPS55386 as a Phase Non-Synchronous Buck Converter
EFFICIENCY
vs
LOAD CURRENT
Figure 40. Figure 41. Design Example 3, Output and Switch Nodes
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