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dc2131afb
DEMO MANUAL DC2131A
DESCRIPTION
LTC3623
15V, ±5A Monolithic Synchronous
Step-Down Regulator
Demonstration circuit 2131A is a current mode DC/DC
step-down Silent Switcher
®
buck regulator featuring the
. The board operates from an input range of 4V
to 15V, and provides ±5A of output current. The output
voltage of the demonstration board can be set from 0V to
V
IN
– 0.5V. It operates at 1MHz and may be synchronized
to an external clock. A soft-start feature controls output
voltage slew rate at start-up, reducing current surge and
voltage overshoot. A power good output and current
monitor signal are provided. Discontinuous conduction
mode can be selected with a jumper. The demonstration
board has options for cable drop compensation, negative
output voltage and input voltage regulation.
L
, LT, LTC, LTM, Linear Technology, the Linear logo and Silent Switcher are registered
trademarks of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
PERFORMANCE SUMMARY
This board is suitable for a wide range of battery-powered,
point-of-load, DDR memory, Thermo Electric Cooler (TEC)
systems and other applications. The LTC3623 is available
in a low profile, 24-pin QFN package. For other output
requirements, see the LTC3623 data sheet.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2131A
Specifications are at T
A
= 25°C
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
IN
Input Supply Range
4
15
V
V
OUT
Output Voltage
Jumper Selectable
1
5
V
I
OUT
Output Current Range, Continuous
200LFM
0
5
A
f
SW
Switching (Clock) Frequency
1
MHz
V
OUT_P-P
Output Ripple
V
IN
= 12V, V
OUT
= 5V, I
OUT
= 5A (20MHz BW)
<25
mV
P–P
I
REG
Output Regulation
V
IN
: 4V to 15V, A
OUT
: 0A to 5A, V
OUT
= 1V
V
IN
: 4V to 15V, A
OUT
: 0A to 5A, V
OUT
= 1.5V
V
IN
: 4V to 15V, A
OUT
: 0A to 5A, V
OUT
= 2.5V
V
IN
: 4.7V to 15V, A
OUT
: 0A to 5A, V
OUT
= 3.3V
V
IN
: 6.5V to 15V, A
OUT
: 0A to 5A, V
OUT
= 5V
±2
±2
±2
±2
±2
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