Datasheet

TP10 TP8

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Test Setup

5 Test Setup

5.1 Test Equipment

Voltage Source (VIN): The input voltage source, (VIN), should be a 0-V to 15-V variable DC source

capable of supplying 2 A

. Connect VIN to J2 as shown in Figure 3.

Multimeters:

• V1: VIN at TP3 (VIN) and TP6 (GND), 0-V to 15-V voltmeter

• V2: VOUT at TP10 (VOUT) and TP8 (GND)

• A1: VIN input current, 0-A

to 2-A

Ammeter

Output Load: The output load should be an electronic constant resistance mode load capable of 0-A

6-A

at 1.2 V.

Oscilloscope: A digital or analog oscilloscope can be used to measure the output ripple. The oscilloscope

should be set for 1-MΩ impedance, 20-MHz bandwidth, AC coupling, 1-µs/div. horizontal resolution,

20-mV/div. vertical resolution. Test points TP10 and TP8 can be used to measure the output ripple voltage

by placing the oscilloscope probe tip through TP10 and holding the ground barrel on TP8 as shown in

Figure 2. Using a leaded ground connection may induce additional noise due to the large ground loop.

Figure 2. Tip and Barrel Measurement for VOUT Ripple

Fan: Some of the components in this EVM may approach temperatures of 80ºC during operation. A small

fan capable of 200 LFM to 400 LFM is recommended to reduce component temperatures while the EVM is

operating. The EVM should not be probed while the fan is not running.

Recommended Wire Gauge:

• VIN to J2: The recommended wire size is 1x AWG #16 per input connection, with the total length of

wire less than 4 feet (2 feet input, 2 feet return).

• J5 to LOAD: The minimum recommended wire size is 1x AWG #16, with the total length of wire less

than 4 feet (2 feet output, 2 feet return).

SLUU819–December 2011 6-A Step-Down Regulator with Integrated Switcher

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