Table 1-3. Output Voltages
Output Voltage (V)
R1(Ω)
R4(Ω)
R2(Ω)
C9(pF)
L1(H)
1.0
6.8 k
100
22 k
1..5 μ
1.05
8.2 k
220
22 k
1.5 μ
1.2
12 k
820
22 k
1.5 μ
1.8
27 k
3.0 k
22 k
10 - 22
2.2 μ
2.5
47 k
3.0 k
22 k
10 - 22
2.2 μ
3.3
68 k
4.7 k
22 k
10 - 22
2.2 μ
5
120 k
1.2 k
22 k
10 - 22
3.3 μ
2 Test Setup and Results
This section describes how to properly connect, set up, and use the TPS54325 EVM. The section also includes
test results typical for the evaluation modules and efficiency, output load regulation, output line regulation, load
transient response, output voltage ripple, input voltage ripple, start up and switching frequency.
2.1 Test Setup
Connect test equipment and TPS54325EVM board as shown in
TPS54325EVM-001
Electronic
Load1
+
–
Oscilloscope
Ch1
VO
VO_GND
12V/ 4A
Power Supply
VIN_GND
VIN
+
–
DMM2
+
–
DMM1
+
–
TP6
TP9
TP 8
TP4
FAN
Figure 2-1. Equipment Setup for TPS54325EVM Board
2.2 Test Procedure
1. Make sure the switch SW1 (EN) is in the “OFF” position.
2. Apply the appropriate V
IN
voltage to VIN and VIN_GND terminals.
3. Turn on SW1 (EN) to enable the EVM output voltage.
Test Setup and Results
4
TPS54325 Step-Down Converter Evaluation Module User's Guide
SLVU300A – JUNE 2009 – REVISED OCTOBER 2021
Copyright © 2021 Texas Instruments Incorporated
