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4.4 Equipment Shutdown
5 TPS40075EVM Typical Performance Data and Characteristic Curves
0 2 4 6 8 10 12 14 16
0
10
20
30
40
50
60
70
80
90
100
10 V
12 V
14 V
η − Efficiency = %
I
L
− Load Current − A
V
IN
= 10 V
V
IN
= 14 V
V
IN
= 12 V
10 V < V
12V_IN
< 14 V
V
1V5_OUT
= 1.5 V
0 A < I
1V5_OUT
< 15 A
LOAD CURRENT
vs
EFFICIENCY
V
IN
8V
12 V
14 V
VIN
0 2 4 6 8 10 12 14 16
1.530
1.500
1.505
1.510
1.515
1.520
1.525
V
IN
= 8 V
V
IN
= 14 V
V
IN
= 12 V
V
OUT
− Output Voltage − V
I
L
− Load Current − A
LOAD CURRENT
vs
OUTPUT VOLTAGE
6 EVM Assembly Drawings and Layout
TPS40075EVM Typical Performance Data and Characteristic Curves
1. Shut down oscilloscope
2. Shut down LOAD1
3. Shut down V
12V_IN
4. Shut down FAN
Figure 4 and Figure 5 present typical performance curves for the TPS40075EVM-001. Since actual
performance data can be affected by measurement techniques and environmental variables, these curves
are presented for reference and may differ from actual field measurements.
Figure 4. TPS40075EVM-001 Efficiency Curves
Figure 5. Line and Load Regulation
Figure 6 through Figure 11 show the design of the TPS40075EVM-001 printed circuit board. The EVM has
been designed using a 4-layer, 2-oz. copper-clad circuit board 3.0" × 3.0" with all components on the top
side to allow the user to easily view, probe and evaluate the TPS40075 control device in a practical
application. Moving components to both sides of the PCB or using additional internal layers can offer
additional size reduction for space constrained systems.
SLUU254 – DECEMBER 2006 Using the TPS40075: A 12-V to 1.5-V @ 15-A Synchronous Buck Converter 9
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