Performance Summary; Quick Start Procedure - Linear Technology LTM4677EY Demo Manual

DEMO MANUAL DC2066A

performance summary

Table 1. Performance Summary (T
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

Table 2. LTM4677 Demo Boards for Up To 140A Point-of-Load Regulation
MAXIMUM OUTPUT CURRENT
Dual 18A
70A
105A
140A
Demonstration circuit 2066A is easy to set up to evaluate
the performance of the LTM4677EY. 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 16V) and GND (input return).
2. Connect the 1.0V 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: SW1: ON; SW2: ON.
5. Turn on the input power supply and check for the proper
output voltages. V
OUT0
should be 1.8V ±1%.
2
= 25°C)
A
CONDITIONS
V
IN
V
IN
V
IN
V
IN
V
IN
NUMBER OF OUTPUTS
2
1
1
1
and GND
OUT0
and GND
OUT1
should be 1.0V ±1%, and V
= 4.5V to 16V, I = 0A to 18A
OUT0
= 4.5V to 16V, V = 0.5V to 1.8V
OUT0
= 4.5V to 16V, I = 0A to 18A
OUT1
= 4.5V to 16V, V = 0.5V to 1.8V
OUT1
= 12V, V = 1.8V, I = 18A
OUT1 OUT1
NUMBER OF LTM4676
µMODULE REGULATORS ON THE BOARD
1
2
3
4
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 LTM4677
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.
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.
OUT1
MIN TYP MAX UNITS
4.5 16
0.5 1.8
18
0.5 1.8
18
87.9
(See Figures 5 and 6)
500
DEMO BOARD NUMBER
DC2066A
DC2143A-A
DC2143A-B
DC2143A-C
dc2066af
V
V
A
V
A
%
kHz