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LX7180A 4 Amp Step-Down Converter Evaluation Board

Microsemi Proprietary and Confidential. LX7180A User Guide Revision 1.0

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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.

1.1

Revision 1.0

This document was published in November 2017. It was the first publication of this document.

Содержание LX7180A

Страница 1: ...LX7180A User Guide LX7180A 4 Amp Step Down Converter Evaluation Board...

Страница 2: ...Applications 2 2 2 Key Features 2 3 Evaluation Board Schematic 3 4 Basic Connection Instructions 4 5 Recommended Operating Conditions 5 5 1 Enabling Regulator from I C Bus 5 5 2 Setting the Output Vol...

Страница 3: ...ide 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 1 1...

Страница 4: ...faults Thermal protection shuts down the regulator under over temperature conditions Over voltage conditions will immediately shut off the output to protect against permanent damage The LX7180A automa...

Страница 5: ...nverter Evaluation Board Microsemi Proprietary and Confidential LX7180A User Guide Revision 1 0 3 3 Evaluation Board Schematic The following illustration shows the evaluation board schematic Figure 1...

Страница 6: ...tructions The following illustration shows how to connect the evaluation board to the power supply while I C is 2 implemented Figure 2 Power Supply and Load Connection with I C Implemented The followi...

Страница 7: ...ramming the control register During disable the regulator and most of the support circuitry is turned off However the I C bus circuitry is still active and may be programmed 2 5 2 Setting the Output V...

Страница 8: ...ntial LX7180A User Guide Revision 1 0 6 6 PCB Layout of Evaluation Board The LX7180A evaluation board is a four layer board The recommended distance between ground layer and the top layer is 6 mil The...

Страница 9: ...LX7180A 4 Amp Step Down Converter Evaluation Board Microsemi Proprietary and Confidential LX7180A User Guide Revision 1 0 7 Figure 5 Layer 2 Ground...

Страница 10: ...LX7180A 4 Amp Step Down Converter Evaluation Board Microsemi Proprietary and Confidential LX7180A User Guide Revision 1 0 8 Figure 6 Layer 3 Sense...

Страница 11: ...LX7180A 4 Amp Step Down Converter Evaluation Board Microsemi Proprietary and Confidential LX7180A User Guide Revision 1 0 9 Figure 7 Layer 4 Bottom...

Страница 12: ...75 evaluation board Table 2 BOM Item Part Description Reference Quantity 1 Microsemi IC LX7180A xy U1 1 2 Test Point J3 SW PGOOD VIN_S VO_S GND_S GND_S 6 3 Terminal VIN VOUT GND GND 4 4 Jumper 4 pin J...

Страница 13: ...onverter Evaluation Board Microsemi Proprietary and Confidential LX7180A User Guide Revision 1 0 11 8 Efficiency Plot The following graph shows the efficiency of the LX7180A at a voltage output of 1 V...

Страница 14: ...oard Microsemi Proprietary and Confidential LX7180A User Guide Revision 1 0 12 9 Dynamic Load Response Scope Shots The following illustrations show the dynamic load response for the evaluation board F...

Страница 15: ...LX7180A 4 Amp Step Down Converter Evaluation Board Microsemi Proprietary and Confidential LX7180A User Guide Revision 1 0 13 Figure 10 Step Response Rising Edge Note CH2 VOUT CH3 SW Node CH4 I LOAD...

Страница 16: ...LX7180A 4 Amp Step Down Converter Evaluation Board Microsemi Proprietary and Confidential LX7180A User Guide Revision 1 0 14 Figure 11 Step Response Falling Edge Note CH2 VOUT CH3 SW Node CH4 I LOAD...

Страница 17: ...Proprietary and Confidential LX7180A User Guide Revision 1 0 15 10 Start up and Short Condition Scope Shots The following illustrations show the scope shots for the LX7180A Figure 12 Start up With ENA...

Страница 18: ...80A 4 Amp Step Down Converter Evaluation Board Microsemi Proprietary and Confidential LX7180A User Guide Revision 1 0 16 Figure 13 Soft Start VIN Tied to ENABLE Note CH1 PG CH3 V CH4 inductor current...

Страница 19: ...umber Description LX7180A 01CLQ QFN 2 mm 2 mm 12L IC LX7180A 11CLQ LX7180A 21CLQ LX7180A 31CLQ LX7180A xyCLQ1 LX7176A EVAL BOARD Evaluation PCB for LX7180A 1Consult factory for other I C slave address...

Страница 20: ...uyer 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 fau...

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