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LX7175 3 Amp Step-Down Converter Evaluation Board

LX7175 User Guide Revision 2.0

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PCB Layout of Evaluation Board

The LX7175 Evaluation Board is a four-layer board. The following illustrations depict each of the board's
four layers.

Figure 3 • Top Silkscreen

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Содержание LX7175

Страница 1: ...LX7175 User Guide LX7175 3 Amp Step Down Converter Evaluation Board...

Страница 2: ...commended Operating Conditions 5 5 1 Mode Selection 5 5 2 Setting the Output Voltage 5 6 PCB Layout of Evaluation Board 6 7 Bill of Materials 11 8 Efficiency Plot 12 9 Dynamic Load Response Scope Shot...

Страница 3: ...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 Revis...

Страница 4: ...M with automatic transition between PWM and PSM mode depending on the load current This allows the converter s efficiency to remain high when load current drops Other features include cycle by cycle c...

Страница 5: ...3 Amp Step Down Converter Evaluation Board LX7175 User Guide Revision 2 0 3 3 Evaluation Board Schematic The following illustration shows the evaluation board schematic Figure 1 Schematic of Evaluatio...

Страница 6: ...Converter Evaluation Board LX7175 User Guide Revision 2 0 4 4 Basic Connection Instructions The following illustration shows how to connect the evaluation board to the power supply Figure 2 Power Supp...

Страница 7: ...EN Pull to GND 5 1 Mode Selection Mode Jumper set to HI means PWN or mode 1 Mode jumper set to LOW means power save mode PSM or mode 0 5 2 Setting the Output Voltage In case a different output voltage...

Страница 8: ...rter Evaluation Board LX7175 User Guide Revision 2 0 6 6 PCB Layout of Evaluation Board The LX7175 Evaluation Board is a four layer board The following illustrations depict each of the board s four la...

Страница 9: ...LX7175 3 Amp Step Down Converter Evaluation Board LX7175 User Guide Revision 2 0 7 Figure 4 Layer 1 Top Layer...

Страница 10: ...LX7175 3 Amp Step Down Converter Evaluation Board LX7175 User Guide Revision 2 0 8 Figure 5 Layer 2 Inner Layer 1...

Страница 11: ...LX7175 3 Amp Step Down Converter Evaluation Board LX7175 User Guide Revision 2 0 9 Figure 6 Layer 3 Inner Layer 2...

Страница 12: ...LX7175 3 Amp Step Down Converter Evaluation Board LX7175 User Guide Revision 2 0 10 Figure 7 Layer 4 Bottom Layer...

Страница 13: ...aneous component Microsemi IC LX7175 U1 1 2 Miscellaneous component Test point SW PGOOD VINSENSE VOSENSE GNDSENSE GNDSENSE FB MODE 8 3 Miscellaneous component Terminal VIN VOUT GND GND 4 4 Miscellaneo...

Страница 14: ...Amp Step Down Converter Evaluation Board LX7175 User Guide Revision 2 0 12 8 Efficiency Plot The following graph shows the efficiency of the LX7175 at a voltage output of 1 V Figure 8 Efficiency Plot...

Страница 15: ...r Evaluation Board LX7175 User Guide Revision 2 0 13 9 Dynamic Load Response Scope Shots The following graph shows the board s dynamic load response PWM Figure 9 Dynamic Load Response With 1 A 3 A Loa...

Страница 16: ...ision 2 0 14 10 Start up Scope Shots The following graphs show the scope shots for the LX7175 10 1 Start up with Enable Toggled The following graph shows startup with ENABLE toggled Figure 10 Start up...

Страница 17: ...Evaluation Board LX7175 User Guide Revision 2 0 15 10 2 Power up with No Load EN Tied to 5 V VIN PWM The following graph shows power up with no load Figure 11 Power up with No Load CH1 V CH2 V CH3 PG...

Страница 18: ...75 User Guide Revision 2 0 16 10 3 Power up with Resistive Load EN Tied to 5 V VIN PWM The following graph shows power up with resistive load Figure 12 Power up with Resistive Load EN Tied to 5 V VIN...

Страница 19: ...Board LX7175 User Guide Revision 2 0 17 10 4 Power up with No Load EN Tied to 5 V VIN PSM The following graph shows power up with no load Figure 13 Power up with No Load EN Tied to 5 V VIN PSM CH1 V...

Страница 20: ...18 11 Ordering Information The following table lists the ordering information for the LX7175 evaluation board and IC Table 3 Ordering Information Part Order Number Description LX7175CLD DFN 3 mm 3 mm...

Страница 21: ...ity 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 entire...

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