Datasheet

Configurations

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5 Configurations

All jumper selections must be made prior to applying power to the EVM. Users can configure this EVM per

the following configurations.

5.1 Switching Frequency Selection

The switching frequency can be set by J5.

Default setting: 500 kHz

Table 2. Switching Frequency Selection

Resistor (RF) Connections

Jumper Set to Switching Frequency (kHz)

(kΩ)

Top (1–2 pin shorted) 0 250

Second (3–4 pin shorted) 187 300

Third (5–6 pin shorted) 619 400

Fourth (7–8 pin shorted) Open 500

Fifth (9–10 pin shorted) 866 650

Sixth (11–12 pin shorted) 309 750

Seventh (13–14 pin shorted) 124 850

Bottom (15–16 pin shorted) 0 970

5.2 Soft-Start Selection

The soft-start time can be set by J4.

Default setting: 1.4 ms

Table 3. Soft-Start Time Selection

Jumper Set to R

MODE

Connections (kΩ) Soft-Start Time (ms)

Top (1–2 pin shorted) 39.2 0.7

Second (3–4 pin shorted) 100 1.4

Third (5–6 pin shorted) 200 2.8

Bottom (7–8 pin shorted) 475 5.6

5.3 Mode Selection

The MODE can be set by J6.

Default setting: Auto Skip

Table 4. MODE Selection

Jumper Set to MODE Selection

Top (1–2 pin shorted) Auto Skip

Bottom (7–8 pin shorted) Forced CCM

Using the TPS53355EVM-743, High-Efficiency, 30-A, Synchronous Buck SLUU522– August 2011

Converter With Eco-mode™— Control Scheme

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