Datasheet

EFFICIENCY - Vin = 12 V
0
10
20
30
40
50
60
70
80
90
100
0 0.5 1 1.5 2 2.5 3
Output Current - A
Efficiency - %
Test Setup and Results www.ti.com
2.1 Input/Output Connections
The TPS54260EVM-597 is provided with input/output connectors and test points as shown in Table 4. A
power supply capable of supplying 1.5 A must be connected to J1 through a pair of 20 AWG wires. The
load must be connected to J2 through a pair of 20 AWG wires. The maximum load current capability must
be 2.5 A. Wire lengths must be minimized to reduce losses in the wires. Test-point TP1 provides a place
to monitor the V
IN
input voltages with TP2 providing a convenient ground reference. TP9 is used to monitor
the output voltage with TP10 as the ground reference.
Table 4. EVM Connectors and Test Points
Reference Designator Function
J1 V
IN
(see Table 1 for V
IN
range)
J2 V
OUT
, 3.3 V at 0.5 A maximum
TP1 V
IN
test point at V
IN
connector
TP2 GND test point at V
IN
TP3 EN test point. Connect EN to ground to disable, open to enable.
TP4 Slow start monitor test point
TP5 PWRGD test point
TP6 PH test point
TP7 Output voltage test point at voltage divider. Used for loop response measurements.
TP8 Test point between voltage divider network and output. Used for loop response measurements.
TP9 Output voltage test point at OUT connector
TP10 GND test point at OUT connector
2.2 Efficiency
The efficiency of this EVM peaks at a load current of about 0.8 A with V
IN
= 12 V, and then decreases as
the load current increases towards full load. Figure 1 shows the efficiency for the TPS54260EVM-597 at
an ambient temperature of 25°C.
Figure 1. TPS54260EVM-597 Efficiency
4
TPS54260EVM-597 2.5-A, SWIFT™ Regulator Evaluation Module SLVU372–March 2009
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