1
dc1533af
DEMO MANUAL DC1533A
DESCRIPTION
LTM8045
Inverting/SEPIC µModule Converter
with Up to 700mA Output
Demo circuit DC1533A features the LTM
®
8045, an inverting/
SEPIC μModule converter delivering up to 700mA of output
current. DC1533A is configured as an inverting converter,
but can be easily changed to a SEPIC configuration for
non-inverting step-up or step-down functionality. The
user adjustable features of the LTM8045 such as output
voltage, switching frequency, soft-start period and under-
voltage lockout can be changed on DC1533A simply by
L
, LT, LTC, LTM, μModule, Linear Technology and the Linear logo are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
PERFORMANCE SUMMARY
BOARD PHOTO
modifying or installing the appropriate resistors or capaci-
tor. The LTM8045 data sheet must be read in conjunction
with this demo manual to properly use or modify demo
circuit DC1533A.
Design files for this circuit board are available at
http://www.linear.com/demo
(T
A
= 25°C)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Minimum Input Voltage, V
IN
2.8
V
Maximum Input Voltage, V
IN
18
V
Regulator Output Voltage, V
OUT
–
R2 = 60.4k
–4.83
–5.19
V
Maximum Output Current, I
OUT
–
V
IN
= 5V
V
IN
= 12V
430
580
mA
mA
Efficiency
V
IN
= 5V, I
OUT
–
= 400mA
80
%
Switching Frequency
R1 = 130k
700
kHz
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