Datasheet

FAN

Source

Vin

Load1

Load2

Test Setup

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4.2 Recommended Test Setup

Figure 3. TPS51225EVM-133 Recommended Test Set Up

Figure 3 is the recommended test set up for evaluating the EVM. Working at an ESD workstation, make

sure that any wrist straps, bootstraps or mats are connected referencing the user to earth ground before

power is applied to the EVM.

Input Connections:

1. Prior to connecting the DC input source, Vin, it is advisable to limit the source current from Vin to 10 A

maximum. Make sure Vin is initially set to 0 V and connected as shown in Figure 3.

2. Connect a voltmeter, V1, at TP1(Vin) and TP6(GND) to measure the input voltage.

3. Connect a current meter, A1, to measure the input current.

Output Connections:

1. Connect Load1 to J2 and set Load to constant resistance mode to sink 0 A dc before Vin is applied

2. Connect a voltmeter, V2, at TP2 (Vout1) and TP7 (GND) to measure the output1 voltage.

3. Connect Load2 to J3 and set Load to constant resistance mode to sink 0 A dc before Vin is applied.

4. Connect a voltmeter, V3, at TP3 (Vout2) and TP8 (GND) to measure the output2 voltage.

Other Connections:

Place a fan as shown in Figure 3 and turn it on, making sure air is flowing across the EVM.

Dual Synchronous Step-Down Fixed Output Controller with 5-V and 3.3-V SLVU735–June 2012

LDOs

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