1
dc1669af
DEMO MANUAL DC1669A
DESCRIPTION
LTM4627EV:
15A Step-Down µModule
Regulator
Demonstration circuit 1669A features the LTM
®
4627EV
μModule
®
regulator, a high performance high effi ciency
step-down regulator. The LTM4627EV has an operating
input voltage range of 4.5V to 20V and is able to provide
an output current of up to 15A. The output voltage is pro-
grammable from 0.6V to 5V and can be remotely sensed
with the internal optional differential remote sensing
amplifi er. The LTM4627EV is a complete DC/DC point-of-
load regulator in a thermally enhanced 15mm
×
15mm
×
4.32mm LGA package requiring only a few input and output
capacitors. This regulator is internally compensated and
employs constant frequency current mode architecture,
enabling a fast transient response and stable control
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.
BOARD PHOTO
PERFORMANCE SUMMARY
loop over a wide range of output capacitance. It supports
frequency synchronization and Burst Mode
®
operation for
increased light-load effi ciency. Output voltage tracking
is also available through the TRACK/SS pin for supply
rail sequencing. The LTM4627 data sheet must be read
in conjunction with this demo manual for working on or
modifying demo circuit 1669.
Design fi les for this circuit board are available at
http://www.linear.com/demo
PARAMETER
CONDITIONS / NOTES
VALUE
Input Voltage Range
4.5V to 20V
Output Voltage, V
OUT
Jumper Selectable
1.0V
DC
, 1.2V
DC
, 1.5V
DC
, 2.5V
DC
, 1.8V
DC
, 3.3V
DC
Maximum Continuous Output Current
Derating is Necessary for Certain Operating
Conditions. See Data Sheet for Details
15A DC
Default Operating Frequency
500kHz
External Clock Synchronous Frequency Range
250kHz to 770kHz
Effi ciency
V
IN
= 12V, V
OUT
= 1.8V, I
OUT
= 15A
86.6%, See Figure 2
