Linear Technology DC2434A Demo Manual

Description
Demonstration circuit 2434A is a high voltage, current-
mode DC/DC step-down converter featuring the
The board operates from an input range of 6V to 60V and
provides a 12V, 5A output when the input exceeds 12V.
The PMOSFET architecture allows it to operate seamlessly
up to 100% duty cycle and function as a saturated switch
below the regulation threshold, down to 6V
at 200kHz 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.
Burst Mode operation that improves efficiency at light
®
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
P /P Efficiency (see Figure 3)
OUT IN
Approximate Size
60V Low IQ Step-Down DC/DC Converter
with 100% Duty Cycle Capability
LTC 3864.
®
. It operates
IN
Specifications are at T
CONDITIONS
Free Air
V = 14V, I
IN
Line and Load (13V
V =14V, I
IN OUT
Component Area x Top Component Height
DEMO MANUAL DC2434A
loads can be enabled with a jumper. A power good output
signal is provided.
This board is suitable for a wide range of automotive,
telecom, industrial and other applications. The LTC3864
is available in small 12-pin thermally enhanced MSOP and
DFN packages. For other output requirements, see the
LTC3864 data sheet or contact the LTC factory.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2434A
L, LT, LTC, LTM, Linear Technology, Burst Mode and the Linear logo are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners.
= 25°C
A
= 5A (20MHz BW)
OUT
to 60V , 0.1A to 5A
IN IN OUT
= 5A
LTC3864
MIN TYP MAX
6
12
0
200
45
) ±0.4
OUT
97.0
1.3 × 1.0 × 0.39
UNITS
60 V
V
5 A
kHz
mV
P–P
%
%
Inches
dc2434af
1