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dc2066af

DEMO MANUAL DC2066A

Description

LTM4677EY 

Dual 18A or Single 36A µModule Regulator 

With Digital Power System Management

Demonstration circuit 2066A is a dual-output, high ef-

ficiency, high density,  µModule regulator with 4.5V to 

16V input range. Each output can supply 18A maximum 

load current. The demo board has a 

LTM

®

4677

 µModule 

regulator, which is a dual 18A or single 36A step-down 

regulator with digital power system management. Please 

see the LTM4677 data sheet for more detailed information.
DC2066A powers up to default settings and produces power 

based on configuration resistors without the need for any 

serial bus communication. This allows easy evaluation 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 LTC’s 

I

2

C/SMBus/PMBus dongle DC1613A to connect to the 

L

, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear 

Technology Corporation. All other trademarks are the property of their respective owners.

BoarD photo

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:  

http://www.linear.com/ltpowerplay

For more details and instructions of LTpowerPlay, please 

refer to LTpowerPlay GUI for LTM4677 Quick Start Guide.

Design files for this circuit board are available at  

http://www.linear.com/demo/DC2066A

Figure 1. Dual-Output LTM4677/DC2066A Demo Circuit

Summary of Contents for LTM4677EY

Page 1: ...verter To fully explore the extensive power system management features of the part download the GUI software LTpowerPlay onto your PC and use LTC s I2C SMBus PMBus dongle DC1613A to connect to the L L...

Page 2: ...e lead 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 pow...

Page 3: ...AL DC2066A LOAD1 0A TO 18A IOUT1 VOUT1 LOAD0 0A TO 18A IOUT0 VOUT0 IIN 4 5V TO 16V VIN DC2066A F02 VOUT GND COUT Figure 2 Proper Measurement Equipment Setup Figure 3 Measuring Output Voltage Ripple Qu...

Page 4: ...0 VOUT1 12 PIN J1 CONNECTOR USB CABLE VIN INPUT POWER SUPPLY LOAD0 LOAD 1 USB TO I2 C PMBus DONGLE DC1613A LTM4677 DEMO BOARD DC2066A LOAD CURRENT A 0 0 EFFICIENCY 95 65 85 75 90 80 70 60 10 0 6 0 14...

Page 5: ...Output Voltage VOUT1 vs Load Current VOUT1 1 8V Measured by 1X Probe on COUT3 Figure 10 Output Voltage Ripple at VIN 12V VOUT1 1 8V IOUT1 18A Measured by 1X Probe on COUT3 Figure 11 Thermal at VIN 12V...

Page 6: ...providesunprecedenteddiagnostic and debug features It becomes a valuable diagnostic tool during board bring up to program or tweak the power management scheme in a system or to diagnose power issues w...

Page 7: ...Toolbar click the R RAM to PC icon to read the RAM from the LTM4677 This reads the configuration from the RAM of LTM4677 and loads it into the GUI Then click the W PC to RAM icon to write these regis...

Page 8: ...CAP X7R 1 8nF 25V 5 0603 AVX 06033C182JAT2A Additional Demo Board Circuit Components 16 0 C2 C15 C17 OPT CAP 0603 OPTIONAL 17 1 Q1 N CHANNEL 30 V MOSFET VISHAY SUD50N03 09P 18 10 R3 R7 R9 R25 R31 R32...

Page 9: ...S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY C...

Page 10: ...CUIT THAT MEETS CUSTOMER SUPPLIED SPECIFICATIONS HOWEVER IT REMAINS THE CUSTOMER S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION COMPONENT SUBSTITUTION AND PRINTED C...

Page 11: ...ER SUPPLIED SPECIFICATIONS HOWEVER IT REMAINS THE CUSTOMER S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MA...

Page 12: ...DING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE EXCEPT TO THE EXTENT OF THIS INDEMNITY NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONS...

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