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QUICK START PROCEDURE
12V
OUT
2OOmV/DIV
AC-COUPLING
I
OUT
2OA/DIV
V
= 32V
IN
V
= V
= 12V
OUT0
OUT1
f
= 150kHz
SW
I
STEP = 0A TO 24A AT 24A/µs (DEFAULT SET-UP)
LOAD
Figure 11. DC2155A-B Load Step Response V
TOP VIEW
20MHz BWL
V
= 413mV
O_P-P
OA TO 24A
DC2155 F11
100µs/DIV
= 32V
IN
V
= 32V
IN
V
= V
= 12V AT 48A
OUT0
OUT1
f
= 150kHz
SW
LTC3886 EXTV
= 12V (TIED TO V
CC
OUT0
Figure 13. DC2155A-B Thermal Performance
DC2155A-A/DC2155A-B
12V
OUT
2OmV/DIV
AC-COUPLING
V
= 32V
IN
V
= V
= 12V AT 48A
OUT0
OUT1
f
= 150kHz
SW
(DEFAULT SET-UP)
Figure 12. DC2155A-B Output Ripple Voltages
LTC3870 EXTV
= 5V (TIED TO 5V ON-BOARD
CC
EXTERNAL BIAS SUPPLY VOLTAGE FROM U3)
T
= 25°C
A
)
NO FORCED AIRFLOW
(DEFAULT SET-UP)
DEMO MANUAL
20MHz BWL
V
= 20mV
O_P-P
50µs/DIV
BOTTOM VIEW
DC2155 F12
DC2155 F13
Rev. C
9
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