DESCRIPTION
Demonstration circuit 3189A features the LTM®4712, a
high efficiency, buck-boost μModule® regulator with a 5V
to 36V input voltage range and 1V to 36V output voltage
range. The output is capable of 12A in buck and buckboost
modes, and 6A under 12VIN and 24VOUT. Derating
is necessary for certain VIN, VOUT, frequency and thermal
conditions. For more information, see the LTM4712
data sheet.
The DC3189A demo board features a constant-current
mode (CCM) to deliver a precise, regulated current while
the load may vary.
The DC3189A demo board is optimized using a default
frequency of 400kHz. The current mode architecture
used in the LTM4712 is peak-current mode control. The
LTM4712 operates in continuous current mode by default
but can be placed in pulse-skipping mode to optimize
efficiency at light loads.
The LTM4712 is offered in a 16mm × 16mm × 8.34mm
ball grid array (BGA) package suitable for automated
assembly by standard surface mount equipment. The
LTM4712 module package features an inductor on top of
the molded substrate for improved heat sinking capability.
The LTM4712 data sheet gives a complete description of
the device, including operation and application information.
Refer to the data sheet in conjunction with this demo
manual prior to working on or modifying DC3189A.