Linear Technology DC2131A Demo Manual

DESCRIPTION
Demonstration circuit 2131A is a current mode DC/DC
step-down Silent Switcher
LTC 3623. 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 – 0.5V. It operates at 1MHz and may be synchronized
IN
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.
PERFORMANCE SUMMARY
SYMBOL PARAMETER
V Input Supply Range
IN
V Output Voltage
OUT
I Output Current Range, Continuous
OUT
f Switching (Clock) Frequency
SW
V Output Ripple
OUT_P-P
I Output Regulation
REG
15V, ±5A Monolithic Synchronous
buck regulator featuring the
®
Specifications are at T
CONDITIONS
Jumper Selectable
200LFM
V = 12V, V
IN
V : 4V to 15V, A
IN
V : 4V to 15V, A
IN
V : 4V to 15V, A
IN
V : 4.7V to 15V, A
IN
V : 6.5V to 15V, A
IN
DEMO MANUAL DC2131A
Step-Down Regulator
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
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.
= 25°C
A
= 5V, I = 5A (20MHz BW)
OUT OUT
: 0A to 5A, V = 1V
OUT OUT
: 0A to 5A, V = 1.5V
OUT OUT
: 0A to 5A, V = 2.5V
OUT OUT
: 0A to 5A, V = 3.3V
OUT OUT
: 0A to 5A, V = 5V
OUT OUT
LTC3623
MIN TYP MAX
4 15
1 5
0 5
1
<25
±2
±2
±2
±2
±2
UNITS
V
V
A
MHz
mV
P–P
%
%
%
%
%
dc2131afb
1