LT3080EDD Datasheet, PDF (1/5 Pages) Linear Integrated Systems – QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 995A

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 995A
ADJUSTABLE LDO LINEAR REGULATOR
LT3080EDD
DESCRIPTION
Demonstration circuit 995A is an adjustable 1.1A lin-
ear regulator featuring LT^®3080. Architected as a
precision current source and voltage follower, it al-
lows this new regulator to be used in many applica-
tions requiring high current, adjustability to zero out-
put, and no heat sink. Also the device brings out the
collector of the pass transistor to allow low dropout
operation when used with multiple supplies.
A key feature of the LT3080 is the capability to sup-
ply a wide output voltage range. By using a reference
current through a single resistor, the output voltage
can be programmed to any level between zero and
36V. The DC995A has a reduced input voltage 25V
due to input capacitor voltage rating. And DC995A is
capable of delivering up to 1.1A output current.
Therefore, the DC995A can be used as a high current
linear regulator, post regulator for switching supply,
variable voltage supply or low output voltage power
supply.
Internal protection circuitry includes current limiting
and thermal limiting.
LT3080 regulator is offered in 8-lead MSOP (with an
Exposed Pad for better thermal characteristics), a
3mm × 3mm DFN, 5-lead TO-220 and a simple-to-
use 3-lead SOT-223 version.
The LT3080 datasheet gives a complete description
of the part, operation and application information.
The datasheet should be read in conjunction with this
quick start guide for working on or modifying the
demo circuit 995A.
If more output current is required or heat-spreading
is needed, LT3080 can be easily paralleled. See
DC1294A for details.
Design files for this circuit board are available.
Call the LTC factory.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Table 1. Performance Summary ( TA = 25oC )
PARAMETER
CONDITION
Minimum Vin Voltage
Vout=1.8V
Maximum Vin Voltage
Minimum Vcontrol Voltage
Vout=1.8V
Maximum Vcontrol Voltage
Output Voltage
JP1, Vout=1.8V
JP1, Vout=0V-5V
Minimum Output Current
Maximum Output Current
Vin-Vout<3.5V
VALUE
2.3V
25V
3.4V
25V
1.8V ±3%
0V-5V±3%
1mA
1.1A
1