Quick Start Procedure - Analog Devices DC3089A Manual

QUICK START PROCEDURE

Demonstration circuit 3089A is easy to set up to evaluate
the performance of the LTM4686B. Refer to Figure 2 for
the proper measurement equipment setup and follow the
procedure below.
1. With power off, connect the input power supply to V
(2.7V-5.75V*) and GND (input return).
2. Connect the 0.5V output load between V
(Initial load: no load).
3. Connect the 0.7V output load between V
(Initial load: no load).
4. Connect the DVMs to the input and outputs. Set default
jumper position: JP1: ON; JP2: ON.
5. Turn on the input power supply and check for the
proper output voltages. V
and V should be 0.7V ±0.5%.
OUT1
* – If 2.70V < V <5.50V,
IN
R9=OPEN, R91=R92=0ohm
– If 4.50V < V < 5.75V,
IN
R9=0ohm, R91=R92=OPEN
and GND
OUT0
and GND
OUT1
should be 0.5V ±0.5%,
OUT0
DEMO MANUAL DC3089A
6. Once the proper output voltages are established, adjust
the loads within the operating range and observe the
output voltage regulation, ripple voltage and other
parameters.
7. Connect the dongle and control the output voltages
IN
from the GUI. See "LTpowerPlay GUI for the LTM4686B
Quick Start Guide" for details.
Note: When measuring the output or input voltage rip-
ple, do not use the long ground lead on the oscilloscope
probe. See Figure 3 for the proper scope probe technique.
Short, stiff leads need to be soldered to the (+) and (–)
terminals of an output capacitor. The probe's ground ring
needs to touch the (–) lead and the probe tip needs to
touch the (+) lead.
Rev 0
3