Texas Instruments TPS70151 Series, User Manual, Page: 16 / 28

Adjustment by Switch and Jumpers
2-2 EVM Adjustments and Test Points
2.1 Adjustment by Switch and Jumpers
S1 switches the transient generator on or off. Table 2–1 lists adjustments that
can be made by jumpers.
Table 2–1. Jumper Functions
Jumper Setting Functional Description
JP1 Short 1-2 – MR2 tied to GND RESET follows MR2
Short 2-3 – MR2 tied to PG_1 RESET will go high after a 120 ms delay when
V
OUT2
reaches 95% of its regulated voltage
and when PG_1 goes high due to V
OUT1
reaching 95% of its regulated voltage.
Open MR2 is disabled
JP2 Shorted – MR1 tied to GND RESET follows MR1
Open MR1 is disabled
JP3
Shorted – EN tied to GND Enable DUT
Open Disable DUT
JP4 Short 1-2 – SEQ tied to GND SEQ low – regulator 1 powers up first with regu-
lator 2 powering up when V
OUT1
is 83% of max
output voltage.
Short 2-3 – SEQ tied to V
IN
SEQ high or left open – regulator 2 powers up
first with regulator 1 powering up when V
OUT2
is
83% of max output voltage
JP5 Shorted – bypass transient generator
for regulator 1 Allows continuous load through onboard load
resistors on regulator 1.
Open – engage transient generator
for regulator 1 Allows pulsed load through onboard load resis-
tors on regulator 1.
JP6 Shorted – bypass transient generator
for regulator 2 Allows continuous load through onboard load
resistors on regulator 2.
Open – engage transient generator
for regulator 2 Allows pulsed load through onboard load resis-
tors on regulator 2.
JP7 – JP11 Shorted – include resistor in parallel
combination Increase regulator 1 load from no load to max
load.
Open – remove resistor from parallel
combination Decrease regulator 1 load from max load to no
load.
JP12 – JP16 Shorted – include resistor in parallel
combination Increase regulator 2 load from no load to max
load.
Open – remove resistor from parallel
combination Decrease regulator 2 load from max load to no
load.
The TPS701xx datasheet, TI Literature number SLVS222, provides further ex-
planation of alternative configurations using the SVS supervisory circuit, pow-
er good, manual reset, and enable inputs.