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DEMO MANUAL SCP-LT8618-BEVALZ 

 

Rev. 0 

 

 

DESCRIPTION

 

Demonstration circuit SCP-LT8618-BEVALZ is a high effi-
ciency 60V, 100mA synchronous step-down regulator. The 
wide input range also allows output voltage inversion by 
using the SCP-LT8618-IEVALZ version of this board. 

Like all boards in the Signal Chain Power series, this board 
is designed to be easily plugged into other SCP boards to 
form a complete signal chain power system, enabling fast 
evaluation  of  low  power  signal  chains.  To  evaluate  this 
board, some universal SCP hardware is required, namely: 

SCP-INPUT-EVALZ 

SCP-FILTER-EVALZ 

SCP-OUTPUT-EVALZ 

SCP-1X2BKOUT-EVALZ 

SCP-1X5BKOUT-EVALZ 

SCP-5X1-EVALZ 

SCP-THRUBRD-EVALZ 

To  properly  evaluate  SCP  series  demo  boards,  you  will 
need  the  SCP  Configurator  companion  software.  SCP 
Configurator can help you choose the right board and to-
pology for your design. 

Note  that  this  Demo  Manual  does  not  cover  details  im-
portant to the operation and configuration regarding the 

LT8618

Please refer to the 

LT8618 datasheet

 for a com-

plete description of the part.  

Design files for this circuit board are available. 

All registered trademarks and trademarks are property of their respective owners.

Table 1.

 

Performance Summary 

SYMBOL 

PARAMETER 

NOTES 

MIN 

TYP 

MAX 

UNITS 

V

IN(MAX) 

Max Input Voltage 

 

 

 

60 

V

OUT(MAX) 

Max Output Voltage  

 

 

 

48 

I

OUT(MAX) 

Max Output Current 

 

 

 

100 

mA 

 

BOARD IMAGE 

 

Figure 1.

 

SCP-LT8618-BEVALZ Evaluation Board

 

 

DEMO MANUAL 

SCP-LT8618-BEVALZ 

Signal Chain Power Series 

LT8618 High Efficiency 

Synchronous Buck Converter 

Summary of Contents for Linear ADI Power SCP-LT8618-BEVALZ

Page 1: ...CP THRUBRD EVALZ To properly evaluate SCP series demo boards you will need the SCP Configurator companion software SCP Configurator can help you choose the right board and to pology for your design Note that this Demo Manual does not cover details im portant to the operation and configuration regarding the LT8618 Please refer to the LT8618 datasheet for a com plete description of the part Design f...

Page 2: ...SCP LT8618 BEVALZ powers up into regulation and sweep VSOURCE through the desired range of operation NOTE Make sure that the input voltage is always within spec If using a dynamic load to measure output volt age make sure the load is initially set to zero 3 Check for proper output voltage The output should be regulated at the programmed value 5 4 Once the proper output voltage is established power...

Page 3: ...function use Molex part 0510650300 with crimp pin 50212 8000 To use an active run signal use a 1 00M resistor for either pull up or pull down resistors R1 and R6 short R11 with 0W and use the drive signal from connector P1 Also short R12 with 0W for output voltage monitoring If precision UVLO operation is desired program enable di vider R1 and R6 such that R6 is 10k to 100k nominal The LT8618 has ...

Page 4: ...nductor and compensation component values Contact the SCP team for applications support if shifting the switching frequency greater than 10 Table4 Resistor Selection Guide for Switching Frequency Setting fSW R2 Ω fSW R2 Ω 200kHz 221k 1 30MHz 30 1k 300kHz 143k 1 40MHz 27 4k 400kHz 110k 1 50MHz 25 5k 500kHz 86 6k 1 60MHz 23 7k 600kHz 71 5k 1 70MHz 22 1k 700kHz 60 4k 1 80MHz 20 5k 800kHz 52 3k 1 90MH...

Page 5: ...IND 33uH 0 42A 0 66OHM WURTH ELEKTRONIK 44031330 13 1 OUTPUT CONN FEMALE 3POS 2 54MM PITCH R A SULLINS PPPC031LGBN RC 14 1 P1 CONN PCB 3POS HEADER WIRE TO BRD WAFER ASSY STRAIGHT 2MM PITCH Note 1 MOLEX 53253 0370 15 1 R1 RES 1M 1 THICK FILM 0805 YAGEO RC0805JR 071ML 16 6 R6 R8 R10 R11 R12 R13 RED THICK FILM 0805 Note 1 N A 17 3 R14 R15 R16 RES 0 OHM 1 3 4W 0612 VISHAY RCL06120000Z0EA 18 2 R17 R18 ...

Page 6: ...9 R15 R6 PG VPOS BIAS VIOC PG VNEG RUN VNEG V VO VO RUN GND VO VNEG VIOC VO GND GND BIAS PAD P 2 N 3 1 9 6 4 8 5 7 10 1 2 3 1 2 3 1 2 1 2 3 GND EN UV VIN PG TR SS FB OUT BIAS RT INTVCC SW BST D THIS DRAWING IS THE PROPERTY OF ANALOG DEVICES INC IN PART OR USED IN FURNISHING INFORMATION TO OTHERS OR FOR ANY OTHER PURPOSE DETRIMENTAL TO THE INTERESTS THE EQUIPMENT SHOWN HEREON MAY BE PROTECTED BY PA...

Page 7: ...ge without notice No license is granted by implication or otherwise under any patent or patent rights of Analog Devices Information furnished by Analog Devices is believed to be accurate and reliable However no responsibility is assumed by Analog Devices for its use nor for any infringements of patents or other rights of third parties that may result from its use Specifications subject to change w...

Page 8: ...not disclose or transfer any portion of the Evaluation Board to any other party for any reason Upon discontinuation of use of the Evaluation Board or termination of this Agreement Customer agrees to promptly return the Evaluation Board to ADI ADDITIONAL RESTRICTIONS Customer may not disassemble decompile or reverse engineer chips on the Evaluation Board Customer shall inform ADI of any occurred da...

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