1
dc2052af
DEMO MANUAL DC2052A
DESCRIPTION
LTC3880EUJ/LTC3883EUH
3-Phase Step-Down DC/DC
Controller with Power System
Management
Demonstration circuit 2052A is a 3-phase single output
synchronous buck converter featuring the LTC3880EUJ, a
dual-phase current mode controller, and the LTC3883EUH,
a single-phase current mode controller with input current
sensing capability. Both the
LTC
®
3880
and
LTC3883
have
a PMBus interface and the power system management
functions.
The layout of DC2052A is very compact with the total
solution within a 1.1 inch by 1.2 inch area for LTC3880,
and 1.1 inch by 0.35inch for LTC3883. The input volt-
age range of this board is from 6.5V to 14V. The output
voltage can be programmed from 0.5V to 1.8V, with an
output current of up to 60A total. The factory default set-
ting for the output voltage is 1.0V. The DC2052A also has
an onboard pulse generator circuit and the dynamic load
circuit which make it easy for the customer to evaluate
the transient performances.
The DC2052A powers up to default settings and produces
power based on configuration resistors or the non-volatile
memory settings (NVM) without the need for any serial
L
, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
LTpowerPlay is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
PERFORMANCE SUMMARY
bus communication. This allows easy evaluation of the
DC/DC converter. To fully explore the extensive digital
power management features of these parts, download the
GUI software LTpowerPlay™ onto your PC and use LTC’s
I
2
C/SMBus/PMBus Dongle DC1613A to connect to the
board. LTpowerPlay allows the user to reconfigure the part
on the fly and store the configuration in EEPROM, view
telemetry of voltage, current, temperature and fault status.
GUI Download
The software can be downloaded from:
http://www.linear.com/ltpowerplay
For more details and instructions of LTpowerPlay, please
refer to “LTpowerPlay for LTC3880 Quick Start Guide.”
Design files for this circuit board are available at
http://www.linear.com/demo
Specifications are at T
A
= 25°C
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
IN
Input Supply Range
6.5
12
14
V
V
OUT
Output Voltage Range
I
OUT
= 0A to 60A, V
IN
= 6.5V to 14V
0.5
1.0
1.8
V
I
OUT
Output Current Range
0
60
A
F
SW
Factory Default Switching
350
kHz
EFF
Peak Efficiency
V
OUT
= 1.0V, See Figure 4
87.5
%
