Analog Devices DC3089A User manual

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DEMO MANUAL DC3089A
DESCRIPTION
LTM4686B
Ultrathin Dual 14A or Single 28A µModule Regulator
With Digital Power System Management
Demonstration circuit 3089A is a dual-output, high effi-
ciency, high density, µModule regulator with 2.7V to 5.75V
input range. Each output can supply 14A maximum load
current. The demo board has a LTM4686BµModule
regulator, which is a dual 14A or single 28A step-down
regulator with digital power system management. Please
see LTM4686B data sheet for more detailed information.
DC3089A powers up to default settings and produce
power based on configuration resistors without the need
for any serial bus communication. This allows easy evalu-
ation of the DC/DC converter. To fully explore the extensive
power system management features of the part, download
the GUI software LTpowerPlay™onto your PC and use
LT C ’s I2C/SMBus/PMBus dongle DC1613A to connect to
All registered trademarks and trademarks are the property of their respective owners.
BOARD PHOTO
the board. LTpowerPlay allows the user to reconfigure the
part on the fly and store the configuration in EEPROM,
view telemetry of voltage, current, temperature and fault
status.
GUI Download
The software can be downloaded from: ltpowerplay
For more details and instructions of LTpowerPlay, please
refer to LTpowerPlay GUI for LTM4686B Quick Start Guide.
Design files for this circuit board are available.
Figure 1. Dual-Output LTM4686B/DC3089A Demo Circuit

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DEMO MANUAL DC3089A
PERFORMANCE SUMMARY
Specifications are at TA= 25°C
PARAMETER CONDITIONS VALUE
Input Voltage Range 2.7V to 5.75V
Output Voltage, VOUT0 VIN = 2.7-5.75V, IOUT0 = 0A to 14A 0.5V to 3.6V, Default: 0.5V
Maximum Output Current, IOUT0 VIN = 2.7-5.75V, VOUT0 = 0.5V to 3.6V 14A
Output Voltage, VOUT1 VIN = 2.7-5.75V, IOUT1 = 0A to 14A 0.5V to 3.6V, Default: 0.7V
Maximum Output Current, IOUT1 VIN = 2.7-5.75V, VOUT1 = 0.5V to 3.6V 14A
Typical Efficiency VIN = 5V, VOUT0 = 0.5V, IOUT0 = 14A 73.5% (See Figure 5)
VIN = 5V, VOUT1 = 0.7V, IOUT1 = 14A 78.2% (See Figure 6)
Default Switching Frequency 650kHz

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DEMO MANUAL DC3089A
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 VIN
(2.7V-5.75V*) and GND (input return).
2. Connect the 0.5V output load between VOUT0 and GND
(Initial load: no load).
3. Connect the 0.7V output load between VOUT1 and GND
(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. VOUT0 should be 0.5V ±0.5%,
and VOUT1 should be 0.7V ±0.5%.
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
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.
* –If 2.70V < VIN <5.50V,
R9=OPEN, R91=R92=0ohm
–If 4.50V < VIN < 5.75V,
R9=0ohm, R91=R92=OPEN

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DEMO MANUAL DC3089A
QUICK START PROCEDURE
Figure 2. Proper Measurement Equipment Setup
Figure 3. Measuring Output Voltage Ripple
+ –
VOUT GND
COUT

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DEMO MANUAL DC3089A
Figure 4. Demo Setup with PC
dc3089a F04
LTM4686B
Demo Board
DC3089A
USB to
I2C/PMBus Dongle
DC1613A
Input
Power Supply
LOAD0
USB CABLE
12-PIN (J1)
CONNECTOR
VOUT0
LOAD1
VOUT1
VIN
QUICK START PROCEDURE
Connecting a PC to DC3089A
You can use a PC to reconfigure the power management
features of the LTM4686B such as:nominal VOUT, mar-
gin set points, OV/UV limits, temperature fault limits,
sequencing parameters, the fault log, fault responses,
GPIOs and other functionalities. The DC1613A dongle
may be plugged when VIN is present.
Figure 5. Efficiency vs Load Current on CH0
Efficiency at VOUT = 0.5V, 650kHz
Figure 6. Efficiency vs Load Current on CH1
Efficiency at VOUT = 0.7V, 650kHz
VIN = 3.3V
VIN = 5V
OUTPUT LOAD CURRENT (A)
0
2
4
6
8
10
12
14
60
65
70
75
80
85
90
EFFICIENCY (%)
DC3089A F05
VIN = 3.3V
VIN = 5V
OUTPUT LOAD CURRENT (A)
0
2
4
6
8
10
12
14
60
65
70
75
80
85
90
EFFICIENCY (%)
DC3089A F06

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DEMO MANUAL DC3089A
QUICK START PROCEDURE
0A TO 7A
LOAD STEP
5A/DIV
ms/DIV
VOUT0
20mV/DIV
dc3089a F07
ms/DIV
dc3089a F08
0A TO 7A
LOAD STEP
5A/DIV
VOUT1
20mV/DIV
Figure 7. Output Voltage VOUT0 vs Load Current (VOUT0 = 0.5V)
Figure 9. Output Voltage Ripple at VIN = 3.3V,
VOUT0 = 0.5V, IOUT0 = 14A
Figure 8. Output Voltage VOUT1 vs Load Current (VOUT1 = 0.7V)
Figure 10. Output Voltage Ripple at VIN = 3.3V,
VOUT1 = 0.7V, IOUT1 = 14A
ms/DIV
50mV/DIV
dc3089a F09
ms/DIV
50mV/DIV
dc3089a F10

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DEMO MANUAL DC3089A
QUICK START PROCEDURE
Figure 11. Thermal at VIN = 3.3V, VOUT0 = 0.5V, IOUT0 = 14A, VOUT1 = 0.7V, IOUT1 = 14A, TA= 25°C, No Airflow

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DEMO MANUAL DC3089A
LTPOWERPLAY SOFTWARE GUI
LTpowerPlay is a powerful Windows based development
environment that supports Linear Technology power
system management ICs and μModules, including the
LTM4675, LTM4676A, LTM4677, LTM4678, LTM4686,
LTC3880, LTC3882 and LTC3883. The software supports
a variety of different tasks. You can use LTpowerPlay to
evaluate Linear Technology ICs by connecting to a demo
board system. LTpowerPlay can also be used in an offline
mode (with no hardware present) in order to build a mul-
tichip configuration file that can be saved and reloaded at
a later time. LTpowerPlay provides unprecedented diag-
nostic and debug features. It becomes a valuable diag-
nostic tool during board bring-up to program or tweak
the power management scheme in a system, or to diag-
nose power issues when bringing up rails. LTpowerPlay
utilizes the DC1613A USB-to-SMBus controller to com-
municate with one of many potential targets, including the
LTM4675, LTM4676A, LTM4677, LTM4686, LTC3880,
LTC3882, LTC3883’s demo system, or a customer board.
The software also provides an automatic update feature
to keep the software current with the latest set of device
drivers and documentation. The LTpowerPlay software
can be downloaded from: ltpowerplay
To access technical support documents for LTC Digital
Power Products visit the LTpowerPlay Help menu. Online
help also available through the LTpowerPlay.
Figure 12. LTpowerPlay Main Interface

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DEMO MANUAL DC3089A
LTPOWERPLAY QUICK START PROCEDURE
The following procedure describes how to use LTpower-
Play to monitor and change the settings of LTM4686B.
1. Download and install the LTPowerPlay GUI:
ltpowerplay
2. Launch the LTpowerPlay GUI.
a. The GUI should automatically identify the DC3089A. The
system tree on the left-hand side should look like this:
b. A green message box shows for a few seconds in the
lower left hand corner, confirming that LTM4686B is
communicating:
c. In the Toolbar, click the “R” (RAM to PC) icon to read the
RAM from the LTM4686B. This reads the configuration
from the RAM of LTM4686B and loads it into the GUI.
d. If you want to change the output voltage to a different
value, like 0.6V. In the Config tab, type in 0.6 in the
VOUT_COMMAND box, like this:
Then, click the “W” (PC to RAM) icon to write these
register values to the LTM4686B. After finishing this
step, you will see the output voltage will change to 0.6V.
If the write is successful, you will see the following
message:
e. You can save the changes into the NVM. In the tool bar,
click “RAM to NVM” button, as following:
f. Save the demo board configuration to a (*.proj) file.
Click the Save icon and save the file. Name it whatever
you want.

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DEMO MANUAL DC3089A
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER, PART NUMBER
Required Circuit Components
1 1 CIN1 CAP., 150µF, ALUM. ELECT., 35V, 20%, 8x10.2mm
SMD, RADIAL, AEC-Q200
PANASONIC, EEHZA1V151P
2 0 C16, C17 CAP., OPTION, 0603
3 2 C2, C15 CAP., 100pF, COG, 25V, 5%, 0603 KEMET, C0603X101J3GACAUTO
VISHAY, VJ0603A101JXXPW1BC
AVX, 06033U101JAT2A
4 6 COUT1, COUT2, COUT3, COUT6,
COUT7, COUT8
CAP., 100µF, X5R, 6.3V, 20%, 1206 AVX, 12066D107MAT2A
KEMET, C1206C107M9PAC7800
KEMET, C1206C107M9PACTU
MURATA, GRM31CR60J107ME39L
NIC, NMC1206X5R107M6.3TRPLPF
TDK, C3216X5R0J107M160AB
5 2 C1, C14 CAP., 1500pF, X7R, 100V, 10%, 0603 AVX, 06031C152KAT2A
WURTH, 885012206109
6 4 CIN2, CIN3, CIN4, CIN5 CAP., 22µF, X5R, 25V, 10%, 1206 AVX, 12063D226KAT2A
MURATA, GRM31CR61E226KE15L
SAMSUNG, CL31A226KAHNNNE
YAGEO, CC1206KKX5R8BB226
7 8 COUT4, COUT5, COUT9, COUT10,
COUT11, COUT12, COUT13,
COUT14
CAP., 180µF, ALUM POLY, 4V, 20%, SMD,
7.3x4.3mm
PANASONIC, EEF-CT0G181R
PANASONIC, EEFCT0G181R
8 2 CIN8, CIN9 CAP., 2.2µF, X7R, 25V, 10%, 0805 AVX, 08053C225KAT2A
KEMET, C0805C225K3RACTU
NIC, NMC0805X7R225K25TRPLPF
TDK, C2012X7R1V225K125AE
9 2 COUT15, COUT16 CAP., 47µF, X5R, 6.3V, 20%, 0805 AVX, 08056D476KAT2A
MURATA, GRM219R60J476ME44
10 3 C21, C22, C24 CAP., 1µF, X5R, 25V, 10%, 0603 AVX, 06033D105KAT2A
NIC, NMC0603X5R105K25TRPF
TAIYO YUDEN, TMK107BJ105KA-T
11 1 C23 CAP., 1µF, X7R, 25V, 10%, 0805 AVX, 08053C105KAT2A
WURTH, 885012207078
12 1 C26 CAP., 0.1µF, X5R, 25V, 10%, 0603 AVX, 06033D104KAT2A
SAMSUNG, CL10A104KA8NNNC
TAIYO YUDEN, TMK107BJ104KA-T
13 2 C27, C28 CAP., 0.01µF, X5R, 25V, 10%, 0603 AVX, 06033D103KAT2A
TDK, C1608X7R1E103K080AA
14 2 C29, C30 CAP., 4.7µF, X5R, 16V, 10%, 0603 AVX, 0603YD475KAT2A
MURATA, GRM188R61C475KAAJD
MURATA, GRM188R61C475KE11D
TDK, C1608X5R1C475K080AC
15 1 C31 CAP., 2.2µF, X7R, 10V, 10%, 0603 AVX, 0603ZC225KAT2A
MURATA, GRM188R71A225KE15D
TDK, C1608X7R1A225K080AC
YAGEO, CC0603KRX7R6BB225
16 0 D1, D2 DIODE, OPTION, SOD-323
17 1 D8 DIODE, SCHOTTKY, 20V, 0.5A, SOD-882,
LEADLESS
NEXPERIA, PMEG2005AEL, 315