Performance Summary; Quick Start Procedure - Linear DC2053A Demo Manual

DEMO MANUAL DC2053A

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

Quick start proceDure

Demonstration circuit 2053A is easy to set up to evaluate
the performance of the LTM4675EY. 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
(4.5V to 17V) and GND (input return).
2. Connect the 1V output load between V
(Initial load: no load).
3. Connect the 1.8V 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
OUT0
should be 1.8 ±0.5%.
6. Once the proper output voltages are established, ad-
just the loads within the operating range and observe
the output voltage regulation, ripple voltage and other
parameters.
2
Specifications are at T
CONDITIONS
V = 4.5V – 17V, I
IN
V = 4.5V – 17V, V
IN
V = 4.5V – 17V, I
IN
V = 4.5V – 17V, V
IN
V = 12V, V
IN
and GND
OUT0
and GND
OUT1
should be 1V ±0.5%, and V
= 25°C
A
= 0A to 9A
OUT0
= 0.5V to 5.5V
OUT
= 0A to 9A
OUT1
= 0.5V to 5.5V
OUT
= 1.8V, I = 9A
OUT OUT
7. Connect the dongle and control the output voltages
from the GUI. See LTpowerPlay GUI for the LTM4675
Quick Start Guide for details.
Note: When measuring the output or input voltage ripple,
do not use the long ground lead on the oscilloscope probe.
IN
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.
Connecting a PC to DC2053A
You can use a LTpowerPlay on a PC to reconfigure the
power management features of the LTM4675 such as:
nominal VOUT, margin set points, OV/UV limits, tempera-
OUT1
ture fault limits, sequencing parameters, the fault log, fault
responses, GPIOs and more. The DC1613A dongle may
be plugged when VIN is present.
VALUE
4.5V to 17V
0.5V to 5.5V, Default: 1V
9A
0.5V to 5.5V, Default: 1.8V
9A
85.3%
500kHz
dc2053afa