1
dc1588af
DEMO MANUAL DC1588A
DESCRIPTION
LTM4611EV:
Ultralow V
IN
15A Step-Down
Power µModule
®
Regulator
Demonstration circuit DC1588A features the LTM
®
4611EV,
a low input voltage 15A step-down power module. The
operating input voltage range is 1.5V to 5.5V with an out-
put voltage range from 0.8V to 5V. DC1588A can support
a load current up to 15A, while derating may be neces-
sary for different V
IN
, V
OUT
and thermal conditions. The
LTM4611EV can operate in pulse-skipping mode or Burst
Mode
®
operation for high effi ciency under a light load. The
DC1588A has a default programmable switching frequency
of 500kHz and may be synchronized to an external clock
from 360kHz up to 710kHz. The TRACK/SS input allows
the output voltage to ramp up and ramp down; coinciden-
tally or ratiometrically with an external voltage. A remote
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
output voltage sense feature improves the output voltage
accuracy under high loads. These features and the avail-
ability of the LTM4611EV in a compact 15mm
×
15mm
×
4.32mm LGA package make the demonstration circuit
ideal for use in many high density point-of-load regula-
tion applications. The LTM4611 data sheet must be read
in conjunction with this demo manual for working on or
modifying the demo circuit 1588A.
Design fi les for this circuit board are available at
http://www.linear.com/demo
(T
A
= 25°C)
PARAMETER
CONDITIONS
VALUE
Input Voltage Range
1.5V to 5.5V
Output Voltage V
OUT
Selectable with Jumpers (Open for 0.8V)
0.8V, 1.0V, 1.2V, 1.5V, 1.8V, 2.5V, 3.3V
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
360kHz to 710kHz
Effi ciency
V
IN
= 5V, V
OUT
= 3.3V, I
OUT
= 15A
93%, See Figure 2
