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LX7186A 1.4 MHz 1A Synchronous Buck Converter Evaluation Board

Microsemi Proprietary and Confidential. User Guide Revision 1.0

Basic Connection Instructions

The following illustration shows how to connect the evaluation board to the power supply.

Figure 3 • Power Supply and Load Connection

Summary of Contents for LX7186A

Page 1: ...User Guide LX7186A 1 4 MHz 1A Synchronous Buck Converter Evaluation Board...

Page 2: ...Revision 1 0 1 2 Product Description 2 2 1 Applications 2 2 2 Key Features 2 3 Evaluation Board Schematic 3 4 Basic Connection Instructions 4 5 Recommended Operating Conditions 5 5 1 Setting the Outpu...

Page 3: ...r Guide Revision 1 0 1 1 Revision History The revision history describes the changes that were implemented in the document The changes are listed by revision starting with the most current publication...

Page 4: ...n battery A standard series of inductors available from several different manufacturers is optimized for use with the LX7186A This feature greatly simplifies the design of switch mode power supplies T...

Page 5: ...rietary and Confidential User Guide Revision 1 0 3 3 Evaluation Board Schematic The following illustrations show the evaluation board schematic for the LX7186A and LX7186A UDFN device Figure 1 LX7186A...

Page 6: ...Evaluation Board Microsemi Proprietary and Confidential User Guide Revision 1 0 4 4 Basic Connection Instructions The following illustration shows how to connect the evaluation board to the power sup...

Page 7: ...recommended operating conditions for the LX7186A evaluation board Table 1 Recommended Operating Conditions Description Symbol Min Max Unit Input voltage VIN 2 5 5 5 V Output current IOUT 0 1 A Operat...

Page 8: ...crosemi Proprietary and Confidential User Guide Revision 1 0 6 6 PCB Layout of Evaluation Board The LX7186A evaluation board is four layers The following illustrations depict each of the board s four...

Page 9: ...LX7186A 1 4 MHz 1A Synchronous Buck Converter Evaluation Board Microsemi Proprietary and Confidential User Guide Revision 1 0 7 Figure 6 LX7186A Bottom Layer Figure 7 LX7186A UDFN Top Silkscreen...

Page 10: ...LX7186A 1 4 MHz 1A Synchronous Buck Converter Evaluation Board Microsemi Proprietary and Confidential User Guide Revision 1 0 8 Figure 8 LX7186A UDFN Top Layer Figure 9 LX7186A UDFN Bottom Layer...

Page 11: ...Description Reference Qty 1 Miscellaneous Components Microsemi IC LX7186A U1 1 2 Miscellaneous Components Test Point SW VIN VOUT GND GND 5 3 Miscellaneous Components Terminal VIN VOUT GND GND 4 4 Mis...

Page 12: ...ck Converter Evaluation Board Microsemi Proprietary and Confidential User Guide Revision 1 0 10 8 Efficiency Plot The following graph shows LX7186A efficiency at a voltage output of 2 5 V Figure 10 LX...

Page 13: ...tial User Guide Revision 1 0 11 9 Dynamic Load Response The following graphs show the dynamic load response of the LX7186A device Figure 11 Dynamic Load Response with IOUT 35 mA 600 mA VIN 5 V VOUT 3...

Page 14: ...d Microsemi Proprietary and Confidential User Guide Revision 1 0 12 10 Soft Start The following graphs show the soft start for the LX7186A device Figure 13 Startup with No Load VIN 5 V VOUT 3 3 V no l...

Page 15: ...Converter Evaluation Board Microsemi Proprietary and Confidential User Guide Revision 1 0 13 Figure 15 Startup with 1 A Resistive Load VIN 5 V VOUT 3 3 V 1 A load Figure 16 Start up with 1 A Resistiv...

Page 16: ...oard Microsemi Proprietary and Confidential User Guide Revision 1 0 14 Figure 17 Start up with Fast VIN Rise and 10 mA Resistive Load VIN 5 V VOUT 3 3 V 10 mA load Figure 18 Start up with Fast VIN Ris...

Page 17: ...5 11 Ordering Information The following table lists the ordering information for the LX7186A evaluation board Table 3 Ordering Information Part Order Number Description LX7186AISE SOT23 5L LX7186AILD...

Page 18: ...Buyer s responsibility to independently determine suitability of any products and to test and verify the same The information provided by Microsemi hereunder is provided as is where is and with all f...