Linear Technology DC2086A Demo Manual

Description
Demonstration circuit 2086A is an accessory board to
the DC1613A, DC2026A and DC590B that allows for a
higher current 3.4V or 5V output rail and the ability to
adapt different input cables to output cables. Extra power
is supplied to the downstream device from the DC2086A
when it is plugged into an external supply. This can be
done via any one of the three input methods: (a) 2.1mm
DC input jack, (b) 2-positon screw-terminal block, and
(c) USB 3.0 Micro-B connector. The DC590B and DC2026A
USB dongles both use a 14-pin ribbon cable for power and
communication to a connected system board, whereas the
DC1613A USB dongle uses a 12-pin ribbon cable for the
same purpose. The DC2086A can take either of these 12-
pin or 14-pin ribbon cable inputs and adapt to the 12-pin,
14-pin, or newer and smaller 4-pin or 3-pin connectors.
This means you are able to use the same USB dongle to
power and talk to any of your demo boards even when it
does not have the mating connector for the dongle. The
DC2086A also allows your PSM devices on your hardware
DEMO MANUAL DC2086A
Adapter for Digital Power System
Management (PSM) Products
to be powered via the dongle as well as the ability to keep
the "brains" of the PSM device alive independent of the
power supply rails on the board, which is extremely useful
in any debugging situation.
The 2.1mm DC input jack and 2-position screw-terminal
block are in parallel and can accept any DC input be-
tween 4.5V and 18V. The USB 3.0 Micro-B connector is
backwards-compatible with any USB Micro-B connec-
tor, exactly like those found on modern cell phones and
consumer electronics. This simplifies cable requirements
when you can reach into your bag and pull out one cable
that powers all your devices, and plug this board in as if
it were your cell phone.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2086A
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
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All other trademarks are the property of their respective owners. Protected by U.S. Patents,
including 7382303 and 7420359.
Figure 1. DC2086A Input and Output Connections
Powered Programming
dc2086afb
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