1
DESCRIPTION
LTM4649EY
10A Step-Down µModule
Regulator
Demonstration circuit 1856A-B features the
µModule
®
regulator, a high performance, high efficiency
step-down regulator. The LTM4649EY has an operating
input voltage range of 4.5V to 16V and is able to provide
an output current of up to 10A. The output voltage is pro-
grammable from 0.6V to 5V and can be remotely sensed
with the internal differential remote sensing amplifier. The
LTM4649EY is a complete DC/DC point-of-load regulator in
a thermally enhanced 15mm
×
9mm
×
5.01mm BGA pack-
age requiring only a few input and output capacitors. Output
L
, LT, LTC, LTM, µModule, Burst Mode, 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
voltage tracking is available through the TRACK/SS pin for
supply rail sequencing. External clock synchronization is
also available through the CLKIN pin. The LTM4649 data
sheet must be read in conjunction with this demo manual
prior to working on or modifying demo circuit 1856A-B.
Design files for this circuit board are available at
(T
A
= 25°C)
PARAMETER
CONDITIONS/NOTES
VALUE
Input Voltage Range
4.5V to 16V
Output Voltage V
OUT
Jumper Selectable
1.0VDC, 1.2VDC, 1.5VDC, 1.8VDC, 2.5VDC, 3.3VDC
Maximum Continuous Output Current
Derating is Necessary for Certain Operating
Conditions. See Data Sheet for Details
10ADC
Default Operating Frequency
450kHz
External Clock Synchronous Frequency Range
250kHz to 780kHz
Efficiency
V
IN
= 12V, V
OUT
= 1.8V, I
OUT
= 10A
89% See Figure 2
