Datasheet

www.ti.com

Bench Test Setup Conditions

5.2 Jumpers

Table 2. Jumpers

JUMPER

FUNCTION PLACEMENT COMMENT

NO.

For sequencing do not fit jumper.

JP6 BUCK1 enable (EN1) Fit according to test requirement

To disable converter fit jumper to GND.

For sequencing do not fit jumper.

JP15 BUCK2 enable (EN2) Fit according to test requirement

To disable converter fit jumper to GND.

Low power: Power save mode ON/OFF. Fit according to test requirement.

JP20 LOW_P If need low power mode test, should connect During normal operation jumper must

V3V. be fitted.

Pulls PGOOD signal to internal 3V3 rail or

JP24 PGOOD Fit according to test requirement

grounds pin

5.3 Test Points and Placement

Buck converter outputs are white and have a label for easy location. Close to any of these test points

there are black ground test points to allow for DVM measurement or to use a metal exposed scope probe

to reduce common mode noise measurements. All test points are described in Table 3.

Table 3. Test Points and Placement

TEST

NAME SIGNAL COLOR COMMENT

POINT

TP1, TPS, TP3,

GND Ground Black

TP4, TP5

TP8 VIN Input supply White

TP9, TP9A VOUT1 Buck1 output White

TP9B Input for gain-phase measurement Buck1 White Normally not used

TP11, TP11A VOUT2 Buck2 output White

TP11B Input for gain-phase measurement Buck2 White Normally not used

TP20 Low_P Low Power input White

Power Good

TP24 PGOOD White

(open drain connected to Buck1 output)

SLVU469–June 2011 List of Tables

Submit Documentation Feedback