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)

EFFICIENCY (%)

DC3089A F05

VIN = 3.3V

VIN = 5V

OUTPUT LOAD CURRENT (A)

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

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

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