Linear Technology DC1723A, Demo Manual

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dc1723af
DEMO MANUAL DC1723A
DESCRIPTION
LTM8050
58V
IN
, 2A Step-Down
µModule Regulator
Demo circuit DC1723A features the LTM
®
8050 , a μModule
®
(micromodule) step-down converter that can deliver up to
2A of output current. DC1723A is designed for a 5V, 2A
output from a 7.5V to 58V input at 400kHz. The wide input
range of the LTM8050 allows a variety of input sources
such as automotive batteries and industrial supplies. At
light loads, the LTM8050 enters Burst Mode
®
operation
to maintain high efficiency and low output ripple over a
broad current range. The user adjustable features of the
LTM8050 such as output voltage, switching frequency,
soft-start, and power good can be changed on DC1723A
L
, LT, LTC, LTM, Linear Technology, the Linear logo, µModule and Burst Mode are registered
trademarks of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
PERFORMANCE SUMMARY
BOARD PHOTO
simply by modifying or installing the appropriate resistors
and/or capacitors.
The LTM8050 data sheet gives a complete description of
the part, operation and application information. The data
sheet must be read in conjunction with this Quick Start
Guide for the demo circuit 1723A.
Design files for this circuit board are available at
http://www.linear.com/demo
Specifications are at T
A
= 25°C
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage, V
IN
V
OUT
= 5V 7.5 V
Maximum Input Voltage, V
IN
V
OUT
= 5V 58 V
Output Voltage, V
OUT
R4 = 93.1k 4.87 5.02 5.17 V
Maximum Output Current 2 A
Switching Frequency R6 = 97.6k 400 kHz
Efficiency V
IN
= 12V, I
OUT
= 2A 85 %