Linear Technology DC2056A Demo Manual

DESCRIPTION
Demonstration circuit 2056A is a 76V input, 1A output
DC/DC power supply featuring the
ates in a high efficiency Burst Mode
an internal high side power MOSFET. The board will accept
an input voltage between 4V and 76V, and provide jumper
selected output voltages of 1.8V, 3.3V, 5V and an option
for additional voltages. The IC includes internal soft-start
and a provision for increasing soft-start time.
Included on the board is an ON/OFF jumper that can also
be configured as a precision undervoltage lockout.
PERFORMANCE SUMMARY
PARAMETER
Input Voltage Range
1.8V Output Voltage
3.3V Output Voltage
5V Output Voltage
Maximum Output Current, I
Typical Efficiency
Typical Output Ripple
Arrow.com.
Downloaded from
LTC 3637. The IC oper-
®
operation and includes
®
CONDITION
V = 12V, I
IN
V = 12V, I
IN
V = 12V, I
IN
V = 4V to 76V, V
OUT IN
V = 12V, V
IN
V = 76V, V
IN
DEMO MANUAL DC2056A
High Efficiency 76V, 1A
Step-Down Converter
Output voltage between 800mV and V
grammed using optional resistors. (Higher voltage rating
output capacitors may be required.)
The LTC3637 data sheet gives a complete description of the
IC operation and application information. The data sheet
must be read in conjunction with this quick start guide.
Design files for this circuit board are available at
http://www.linear.com/demo
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners.
Specifications are at T = 25°C
A
= 0A to 1A
OUT
= 0A to 1A
OUT
= 0A to 1A
OUT
= 1.8V, 3.3V or 5V
OUT
= 5V, I = 1A
OUT OUT
= 5V, I = 1A (20MHz BW)
OUT OUT
LTC3637EMSE
can be pro-
IN
VALUE
4V to 76V
1.8V ±2%
3.3V ±2%
5V ±2%
1A
85.5%
109mV
P-P
dc2056af
1