User Manual

Typical Performance Characteristics
The device can be expected to perform as characterized within these parameters
Characteristic Min Typical Max
Input voltage 5V 33.6V
Output Voltage, Min 3v
Output Voltage, Max 12v 12.5v 13v
Output Power 25W
Output Current
1
0A 3A
Output Ripple 10mV 25mV 40mV
Efficiency (See Figure 2) 66% 90% 96%
Power dissipation 120mW 1.12W
2
2W
Switching frequency 500kHz
1
Limited at high voltages by the max power output – see graph below
2
Rating at 16Vin to 6 Vout, with a load of 2A.
Absolute Maximum ratings
Operation beyond these parameters may permanently damage the device
Characteristic Min Max
Input voltage 4.9V 36v
Output Current 0A 3A
Power dissipation 3.4W
Ambient Temperature -20C 70C
Use
Connect your DE-SWADJ 3 to a power supply or battery and a voltmeter. Turn the worm gear
attached to the potentiometer (labeled Adjust) clockwise to reduce output voltage and
counterclockwise to increase it. Be sure to adjust to the desired output voltage before attaching the
DE-SWADJ 3 to your application!
Overcurrent/overtemperature behavior
If the current limit has been considerably exceeded or if the device is overheated the product will
gradually reduce the output voltage in an attempt to reduce the load on the device. Once the extra
load is removed or the temperature is brought down, the desired output voltage will be restored. It is
unlikely that you will destroy the regulator by exceeding the current/temperature ratings but we still
recommend practicing good engineering techniques and do not overload the device beyond the
recommended operating parameters.
Additional notes
DE-SWADJ 3 uses a 25 turn worm gear driven potentiometer and cannot wiggle loose. Do not
apply glue to the voltage adjustment pot.
For best performance, mount DE-SWADJ 3 in an open space with some air flowing across it to
keep it cool.