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DESCRIPTION
Demonstration circuit SCP-LT8618-IEVALZ is a high effi-
ciency 65V, 100mA synchronous step-down regulator
configured as an inverting buck topology for positive to
negative DC voltage conversion.
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-OUTPUT-EVALZ
SCP-FILTER-EVALZ
SCP-THRUBRD-EVALZ
Table 1. Performance Summary
SYMBOL
PARAMETER
V
Max Input Voltage
IN(MAX)
V
Max Output Voltage
OUT(MAX)
I
Switch Current Limit
SW(LIM)
BOARD IMAGE
Arrow.com.
Downloaded from
DEMO MANUAL SCP-LT8618-IEVALZ
SCP-1X2BKOUT-EVALZ
SCP-1X5BKOUT-EVALZ
SCP-5X1-EVALZ
NOTES
Figure 1. SCP-LT8618-IEVALZ Evaluation Board
DEMO MANUAL
SCP-LT8618-IEVALZ
Signal Chain Power Series
LT8618 Inverting Regulator
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
plete description of the part.
Design files for this circuit board are available.
All registered trademarks and trademarks are property of their respective owners.
LT8618 datasheet
for a com-
MIN
TYP
MAX
UNITS
60
–48
150
200
250
V
V
mA
Rev. 0
1
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Related Manuals for Linear ADI Power LT8618
Summary of Contents for Linear ADI Power LT8618
- Page 1 DEMO MANUAL DEMO MANUAL SCP-LT8618-IEVALZ SCP-LT8618-IEVALZ Signal Chain Power Series LT8618 Inverting Regulator DESCRIPTION Demonstration circuit SCP-LT8618-IEVALZ is a high effi- To properly evaluate SCP series demo boards, you will ciency 65V, 100mA synchronous step-down regulator need the SCP Configurator companion software. SCP configured as an inverting buck topology for positive to Configurator can help you choose the right board and to- negative DC voltage conversion.
- Page 2 DEMO MANUAL SCP-LT8618-IEVALZ QUICK START PROCEDURE Demonstration circuit SCP-LT8618-IEVALZ is easy to set NOTE: Make sure that the input voltage is always within up to evaluate the performance of any SCP hardware spec. If using a dynamic load to measure output volt- configuration.
- Page 3 VIOC cannot be implemented with the board in the invert- –4.0 422k 102k ing buck configuration. If using a VIOC-capable negative –4.5 511k 107k linear regulator, ensure R8 and R13 are open and inde- –5.0 1.02M 187k pendently set fixed output voltages for both the SCP- –5.5 698k 115k LT8618-IEVALZ board and the negative linear regulator –6.0...
- Page 4 DEMO MANUAL SCP-LT8618-IEVALZ FREQUENCY PIN CONFIGURATION The LT8618 allows the user to program an operating fre- quency by a single resistor. The default operating fre- quency is 2.0MHz. Note that changing the switching fre- quency may affect other parameters and likely necessi- tates a change in inductor and compensation component values.
- Page 5 DEMO MANUAL SCP-LT8618-IEVALZ PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER ANALOG DEVICES 08_059761a CAP 22uF 63V ALUM 8x10.5 SUN ELECTRONIC 63CE22BSA CAP 1uF 100V CER, X7R 1206 TAIYO YUDEN HMK316B7105KL-T CAP 0.1uF 100V CER X7R 0603 SAMSUNG CL10B104KC8NNNC CAP 47nF 50V CER X7R 0603 KEMET C0603X473K5RACTU CAP MLCC 0603 (Note 1)
- Page 6 DEMO MANUAL SCP-LT8618-IEVALZ SCHEMATIC DIAGRAM Rev. 0 Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from...
- Page 7 DEMO MANUAL SCP-LT8618-IEVALZ Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog 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.
- Page 8 DEMO MANUAL SCP-LT8618-IEVALZ ESD Caution ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality. Legal Terms and Conditions By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and conditions set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern.
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