1
dc1041a-af
DEMO MANUAL DC1041A-A
DESCRIPTION
LTM4601
5V
IN
to 20V
IN
, 12A Step-Down
µModule Regulator
Demonstration circuit DC1041A-A features the
LTM
®
4601EV, a 12A high efficiency, high density switch
mode step-down converter. The input voltage range is
from 4.5V to 20V. The output voltage is jumper select-
able for popular voltages from 0.6V to 5V. The PLLIN
pin supports synchronizing the μModule
®
regulator to
an external clock. The TRACK/SS pin allows the user to
program output ramp-up and ramp-down rates which
may coincidentally or ratiometrically track with another
supply’s output if desired. Output voltage margining of
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
±5% from the nominal value is available via the margin
control pins MARG0 and MARG1. The LTM4601 data sheet
must be read in conjunction with this demo manual prior
to working on or modifying demo circuit DC1041A-A.
Design files for this circuit board are available at
http://www.linear.com/demo
(T
A
= 25°C)
PARAMETER
CONDITION
VALUE
Input Voltage Range
4.5V to 20V
Output Voltage V
OUT
Jumper Selectable (Open for 0.6V)
1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V
Maximum Continuous Output Current
Derating is Necessary for Certain V
IN
, V
OUT
and
Thermal Conditions
12A DC
Default Operating Frequency
850kHz
External Synchronous Clock Frequency Range
Refer to Data Sheet for Details
600kHz to 1000kHz
Efficiency V
IN
= 12V, V
OUT
= 1.5V, I
OUT
= 12A
83%, See Figure 2
