1
dc2081a-bfa
DEMO MANUAL DC2081A-B
Description
LTM4630EY-1
Dual 18A or Single 36A
μ
Module
Regulator with
±
0.8% DC and
±
3% Transient Accuracy
Demonstration circuit 2081A-B features the
,
the high efficiency, high density, dual 18A, switch mode
step-down μModule
®
regulator with ±0.8% total DC output
accuracy. The input voltage is from 4.5V to 15V. The output
voltage is programmable from 0.6V to 1.8V. DC2081A-B is
configured as dual-phase, single-output, which can deliver
up to 36A maximum. With the help of external compensa-
tion, ±3% transient accuracy can be achieved with 25%
load step. The board designs with minimum components
to demonstrate this high efficiency, high density μModule.
As explained in the data sheet, output current de-rating is
L
, LT, LTC, LTM, Linear Technology, the Linear logo and μModule are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
performance summary
necessary for certain V
IN
, V
OUT
, and thermal conditions.
These features and the availability of the LTM4630EY-1
in a compact 16mm × 16mm × 5.01mm BGA package
make it ideal for use in many high-density point-of-load
applications. The LTM4630-1 data sheet must be read
in conjunction with this demo manual for working on or
modifying the demo circuit DC2081A-B.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2081A-B
Specifications are at T
A
= 25°C
PARAMETER
CONDITIONS
VALUE
Input Voltage Range
4.5V ~ 15V
Output Voltage V
OUT
V
IN
= 4.5 ~ 15V, I
OUT
= 0 ~ 36A (for LTM4630-1A)
1.0V ± 0.8% (0.992V ~ 1.008V)
Maximum Continuous Output Current
De-rating is Necessary for Certain V
IN
, V
OUT
and
Thermal Conditions, See Data Sheet for Detail
36A
Default Operating Frequency
400kHz
Efficiency
V
IN
= 5V, V
OUT
= 1.0V, I
OUT
= 36A, f
SW
= 400kHz
85.7%, See Figure 2
Load Transient
V
IN
= 12V, V
OUT
= 1.0V, I
STEP
= 0 ~ 9A
< 56.3mV
P-P
, See Figure 3
