1
dc2605af
DEMO MANUAL DC2605A
DESCRIPTION
LTC3884ERHE-1, LTC3874EUF-1
Polyphase Single 120A Output Synchronous Buck
Converter with Power System Management
Demonstration circuit 2605A is a high efficiency, high
density, single-output buck converter with 7V to 14V input
range. The output voltage is adjustable from 0.5V to 1.5V,
and can supply up to 120A of load current with a 1V out-
put. The demo board features the
paired with
a slave controller LTC3874-1 to provide a 4-phase buck
converter solution. The LTC3884-1 is a dual output poly
phase step-down controller for ultra-low DCR sensing
with digital power system management. The LTC
®
3874-1
is a dual PolyPhase
®
current mode synchronous step-
down slave controller. Please see LTC3884-1 data sheet
for more detailed information.
DC2605A powers up to default settings and produces
power based on configuration resistors or with its
non-volatile memory without the need for any serial
bus communication. This allows easy evaluation of the
DC/DC converter. To fully explore the extensive power
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PERFORMANCE SUMMARY
system management features of the part, 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 GUI for LTC3884-1 demo manual.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2605A
Specifications are at T
A
= 25°C
PARAMETER
CONDITIONS
VALUE
Input Voltage Range
7V to 14V
Output Voltage, V
OUT
V
IN
= 7-14V, Single Output, I
OUT
= 0A to 120A
Default: 1V
Maximum Output Current, I
OUT
V
IN
= 7-14V, Single Output, V
OUT
= 0.5V to 1.5V
120A
Typical Efficiency
V
IN
= 12V, Single Output, V
OUT
= 1.0V, 120A Load
90.2%
Peak Efficiency
V
IN
= 12V, Single Output, V
OUT
= 1.0V, 70A Load
92.2%
Default Switching Frequency
425kHz
