Datasheet

Setup

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The following listing describes the functions of the various test points.

Test Points

● EN1 Enable for switcher 1

● EN2 Enable for switcher 2

● EN3 Enable for switcher 3

● EN4 Enable for the linear regulator

● EXTSUP External power source for the MOSFETs

● GND (x9) Ground

● PH1 Switcher 1 phase pin

● PH2 Switcher 2 phase pin

● PH3 Switcher 3 phase pin

● RST1 Reset output for switcher 1

● RST2 Reset output for switcher 2

● RST3 Reset output for switcher 3

● RST4 Reset output for the linear regulator

● VBAT Power Input

● VIN Power Input after the reverse battery protection diode

● VINLR1 Linear regulator input

● VOUT1 Switcher 1 output

● VOUT2 Switcher 2 output

● VOUT3 Switcher 3 output

● VOUT4 Linear regulator output

● VSUP Power input for switcher 3

2.2 Setup

The input voltage range for the converter is 4 V to 40 V. The minimum input voltage is 6.5 V at start-up.

The input voltage range is 4 V to 10 V for switcher 3.

2.3 Operation

For the correct operation of the TPS4334xEVM, Delay, EN1, EN2, EN3, EN4, EXTSUP, JP1, JP5, JP6,

PGATE, and VIN2, must be properly configured. The recommended setting, using the switch and shorting

blocks, follow.

Delay 1 ms

EN1 Disabled

EN2 Disabled

EN3 Disabled

EN4 Disabled

EXTSUP VOUT1

JP1 Auto

JP5 External supply

ROSC 400 kHz

SLEW Fast

SYNC Forced continuous conduction mode

VIN2 VIN

VINLR1 VIN

TPS4334xEVM Evaluation Module SLVU463–July 2011

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