Datasheet

TP10(21)TP7(19)

Metal Ground Barrel

Probe Tip

Test Setup

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4 Test Setup

4.1 Test Equipment

Voltage Source VIN:

The input voltage source VIN must be a 0-V to 6-V variable dc source capable of supplying 3 Adc.

Connect Vin to J6 as shown in Figure 3.

Multimeters: V1:

Vin at TP5 (Vin_MST) and TP8 (GND)

V2: 1.5 Vout at TP7 (Vout_MST) and TP10 (GND)

V3: 1.2 Vout at TP19 (Vout_SLV) and TP21 (GND)

A1: Vin input current

Output Load:

Load1: The output load1 must be an electronic constant-resistance-mode load capable of 0 Adc to 5 Adc

at 1.5 V.

Load2: The output load2 must be an electronic constant-resistance-mode load capable of 0 Adc to 5 Adc

at 1.2 V.

Oscilloscope:

A digital or analog oscilloscope can be used to measure the output ripple. The oscilloscope must be set

for 1-MΩ impedance, 20-MHz bandwidth, ac coupling, 1-µs/division horizontal resolution, 20-mV/division

vertical resolution. Test points TP7, TP10 can be used to measure 1.5-V master output ripple voltage.

TP19 and TP21 can be used to measure 1.2-V slave output ripple voltage. Place the oscilloscope probe

tip through TP7 (TP19), and hold the ground barrel TP10 (TP21) as shown in Figure 2.

Do not use a leaded ground connection as this may induce additional noise due to the large ground loop.

Figure 2. Tip and Barrel Measurement for Vout Ripple

Recommended Wire Gauge:

1. Vin to J6: The recommended wire size is AWG 16 per input connection, with the total length of wire

less than 4 feet (2-foot input, 2-foot return).

2. J3 to LOAD1 the minimum recommended wire size is AWG 16, with the total length of wire less than 4

feet (2-foot input, 2-foot return)

3. J8 to LOAD2 the minimum recommended wire size is AWG16, with the total length of wire less than 4

feet (2-foot input, 2-foot return)

Using the TPS53310EVM-755, A 3-A Eco-mode™ Integrated Switcher With SLUU826– January 2012

Master-Slave

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