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Summary of Contents for Microsemi LX7186A
- Page 1 User Guide LX7186A 1.4 MHz 1A Synchronous Buck Converter Evaluation Board...
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Page 2: Table Of Contents
LX7186A 1.4 MHz 1A Synchronous Buck Converter Evaluation Board Contents 1 Revision History ..........................1 1.1 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 ...................... -
Page 3: Revision History
LX7186A 1.4 MHz 1A Synchronous Buck Converter Evaluation Board 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. Revision 1.0 Revision 1.0 was published in August 2017. It was the first publication of this document. -
Page 4: Product Description
LX7186A 1.4 MHz 1A Synchronous Buck Converter Evaluation Board Product Description The LX7186A is 1.4 MHz fixed frequency, current-mode, synchronous PWM buck (step-down) DC-to-DC converter, capable of driving a 1 A load with high efficiency, and excellent line and load regulation. The devices integrate synchronous P-channel and N-channel power MOSFET switches with low on- resistance. -
Page 5: Evaluation Board Schematic
LX7186A 1.4 MHz 1A Synchronous Buck Converter Evaluation Board Evaluation Board Schematic The following illustrations show the evaluation board schematic for the LX7186A and LX7186A-UDFN device. Figure 1 • LX7186A Evaluation Board Schematic Figure 2 • LX7186A-UDFN Evaluation Board Schematic... -
Page 6: Basic Connection Instructions
LX7186A 1.4 MHz 1A Synchronous Buck Converter Evaluation Board Basic Connection Instructions The following illustration shows how to connect the evaluation board to the power supply. Figure 3 • Power Supply and Load Connection Microsemi Proprietary and Confidential. User Guide Revision 1.0... -
Page 7: Recommended Operating Conditions
LX7186A 1.4 MHz 1A Synchronous Buck Converter Evaluation Board Recommended Operating Conditions The following table lists the recommended operating conditions for the LX7186A evaluation board. Table 1 • Recommended Operating Conditions Description Symbol Unit Input voltage Output current Operating ambient temperature –40... -
Page 8: Pcb Layout Of Evaluation Board
LX7186A 1.4 MHz 1A Synchronous Buck Converter Evaluation Board PCB Layout of Evaluation Board The LX7186A evaluation board is four layers. The following illustrations depict each of the board's four layers. Figure 4 • LX7186A Top Silkscreen Figure 5 • LX7186A Top Layer... - Page 9 LX7186A 1.4 MHz 1A Synchronous Buck Converter Evaluation Board Figure 6 • LX7186A Bottom Layer Figure 7 • LX7186A-UDFN Top Silkscreen Microsemi Proprietary and Confidential. User Guide Revision 1.0...
- Page 10 LX7186A 1.4 MHz 1A Synchronous Buck Converter Evaluation Board Figure 8 • LX7186A-UDFN Top Layer Figure 9 • LX7186A-UDFN Bottom Layer Microsemi Proprietary and Confidential. User Guide Revision 1.0...
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Page 11: Bill Of Materials
LX7186A 1.4 MHz 1A Synchronous Buck Converter Evaluation Board Bill of Materials The following table lists the bill of materials for the LX7186A evaluation board. Table 2 • Bill of Materials Item Part Type Part Description Reference Miscellaneous Components Microsemi IC—LX7186A... -
Page 12: Efficiency Plot
LX7186A 1.4 MHz 1A Synchronous Buck Converter Evaluation Board Efficiency Plot The following graph shows LX7186A efficiency at a voltage output of 2.5 V. Figure 10 • LX7186A Efficiency with 2.5 V VOUT Microsemi Proprietary and Confidential. User Guide Revision 1.0... -
Page 13: Dynamic Load Response
LX7186A 1.4 MHz 1A Synchronous Buck Converter Evaluation Board 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 = 3.3 V, Load 35 mA↔0.6 A. -
Page 14: Soft Start
LX7186A 1.4 MHz 1A Synchronous Buck Converter Evaluation Board 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 load. Figure 14 • Startup with No Load VIN= 5 V, VOUT= 3.3 V, no load. - Page 15 LX7186A 1.4 MHz 1A Synchronous Buck Converter Evaluation Board 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 Resistive Load VIN = 5 V, VOUT = 3.3 V, 1 A load .
- Page 16 LX7186A 1.4 MHz 1A Synchronous Buck Converter Evaluation Board 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 Rise and 800 mA Resistive Load VIN = 5 V, VOUT = 3.3 V, 800 mA load.
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Page 17: Ordering Information
LX7186A 1.4 MHz 1A Synchronous Buck Converter Evaluation Board 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 UDFN 2x2 6L LX7186A EVALUATION BOARD... - Page 18 Microsemi. It is the 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 faults, and the Microsemi Corporate Headquarters entire risk associated with such information is entirely with the Buyer.
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