1
dc1198bafa
DEMO MANUAL DC1198B-A
Description
LTM4605
20V, 5A High Efficiency
Buck-Boost µModule Regulator
Demonstration circuit DC1198B-A features the
LTM
®
4605EV
, the high efficiency, high density switch
mode buck-boost µModule
®
regulator. The LTM4605EV can
regulate its output voltage from an input voltage above,
below, or equal to the output. The input voltage range
of DC1198B-A is from 4.5V to 20V with a preset output
voltage of 12V. The rated load current is 5A, although
derating is necessary for certain V
IN
, V
OUT
, and thermal
conditions. The switching frequency may be synchronized
to an external clock from 200kHz to 400kHz. This PLL
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
can be used not only to reduce undesirable frequency
harmonics but also to parallel LTM4605 to provide high
output current. The LTM4605 data sheet must be read in
conjunction with this demo manual prior to working on
or modifying DC1198B-A.
Design files for this circuit board are available at
http://www.linear.com/demo
(T
A
= 25°C)
PARAMETER
CONDITIONS
VALUE
Input Voltage Range V
IN
4.5V to 20V
Output Voltage V
OUT
V
IN
= 12V, I
OUT
= 5A.
12V ± 2%
Maximum Continuous Output Current
Derating Is Necessary for Certain V
IN
, V
OUT
, and
Thermal Conditions
5A
DC
at 5V
IN
12A
DC
at V
IN
> V
OUT
Default Operating Frequency
300kHz
Efficiency
V
IN
= 12V, V
OUT
= 12V, I
OUT
= 5A
97.6%, See Figure 3 for More Information
Load Transient
V
IN
= 5V, V
OUT
= 12V
See Figure 4 for Details
Downloaded from
