Linear Technology DC2269A-A Demo Manual

Description
Demonstration circuit 2269A-A is a dual-output, high ef-
ficiency, high density, µModule
PCB board with 4.5V to 26.5V input range. Each output
can supply 13A maximum load current. The demo board
has a LTM 4676 µModule regulator, which is a dual 13A
®
or single 26A step-down regulator with PMBus power
system management. The DC2269A can be easily inserted
to an edge connector for testing and debugging. It has an
optional input filter inductor (L1) to further reduce input
ripple EMI noise.
DC2269A-A powers up to default settings and produce
power based on configuration resistors without the need
for any serial bus communication. This allows easy evalu-
ation of the DC/DC converter. To fully explore the extensive
power system management features of the part, download
the GUI software LTpowerPlay™ onto your PC and use
performance summary
PARAMETER
Input Voltage Range
Output Voltage, V
OUT0
Maximum Output Current, I
OUT0
Output Voltage, V
OUT1
Maximum Output Current, I
OUT1
Typical Efficiency
Default Switching Frequency
Dual Step-Down µModule Regulator
with PMBus Power System Management
supply on a small 1.5"×1.2"
®
Specifications are at T
CONDITIONS
V = 4.5V to 26.5V, I
IN
V = 4.5V to 26.5V, V
IN
V = 4.5V to 26.5V, I
IN
V = 4.5V to 26.5V, V
IN
V = 12V, V = 1.8V, I
IN OUT
Figure 1. Dual-Output LTM4676/DC2269A-A Demo Circuit
DEMO MANUAL DC2269A-A
2
LTC's I C/SMBus/PMBus dongle DC2086A together with
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, cur-
rent, 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 LTM4676 Quick Start Guide.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2269A-A
L, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks
and LTpowerPlay is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
= 25°C
A
= 0A to 13A
OUT0
= 0.5V to 4V
OUT
= 0A to 13A
OUT1
= 0.5V to 5.4V
OUT
= 13A
OUT
LTM4676EY
VALUE
4.5V to 26.5V
0.5V to 4V, Default: 1V
13A
0.5V to 5.4V, Default: 1.8V
13A
86.3%
500kHz
dc2269aaf
1