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Summary of Contents for Microchip Technology LX7180A
- Page 1 LX7180A Evaluation Board User’s Guide 2023-2024 Microchip Technology Inc. and its subsidiaries DS50003547B...
- Page 2 Microchip intellectual property rights unless otherwise stated. GestIC is a registered trademark of Microchip Technology Germany II GmbH & Co. KG, a subsidiary of Microchip Technology Inc., in other countries. All other trademarks mentioned herein are property of their respective companies.
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Page 3: Table Of Contents
1.1 Introduction ..................... 9 1.2 LX7180A Short Overview ................9 1.3 What is the LX7180A Evaluation Board? ............. 10 1.4 Contents of the LX7180A Evaluation Board Kit ..........10 Chapter 2. Installation and Operation 2.1 Introduction ....................11 2.2 Features ....................... 12 2.3 Getting Started ..................... - Page 4 LX7180A Evaluation Board User’s Guide NOTES: 2023-2024 Microchip Technology Inc. and its subsidiaries DS50003547B-page 4...
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Page 5: Preface
• Customer Support • Document Revision History DOCUMENT LAYOUT This document describes how to use the LX7180A Evaluation Board as a development tool. The manual layout is as follows: • Chapter 1. “Product Overview” – Important information about the LX7180A Evaluation Board. -
Page 6: Conventions Used In This Guide
Choice of mutually exclusive errorlevel {0|1} character: { | } arguments; an OR selection Ellipses... Replaces repeated text var_name [, var_name...] Represents code supplied by void main (void) user { ... 2023-2024 Microchip Technology Inc. and its subsidiaries DS50003547B-page 6... -
Page 7: Recommended Reading
Preface RECOMMENDED READING This user's guide describes how to use the LX7180A Evaluation Board. Another useful document is the following Microchip document listed below, which is available and recommended as a supplemental reference resource: • LX7180A Data Sheet – “4A Step-Down Regulator”... - Page 8 LX7180A Evaluation Board User’s Guide NOTES: 2023-2024 Microchip Technology Inc. and its subsidiaries DS50003547B-page 8...
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Page 9: Chapter 1. Product Overview
0.6V to 1.195V through a high-speed (up to 3.4 MHz), bidirectional I C bus. The LX7180A operates from 3V to 5.5V rails and outputs 0.6V to 100% of the input volt- age. Cycle-by-cycle current limiting protects against over-current conditions. Hiccup mode provides protection for heavy over-load or short-circuit faults. -
Page 10: What Is The Lx7180A Evaluation Board
LX7180A Evaluation Board User’s Guide WHAT IS THE LX7180A EVALUATION BOARD? The LX7180A Evaluation Board is used to evaluate Microchip's Technology LX7180A product. The input voltage range for a typical 0.6V output application is 3V-5.5V and the load current can go up to 4A. -
Page 11: Chapter 2. Installation And Operation
USER’S GUIDE Chapter 2. Installation and Operation INTRODUCTION The LX7180A operates from 3V to 5.5V rails, outputs 0.6V to 100% of the input voltage and can deliver an output current of up to 4A. Using the I C interface, V can be adjusted between 0.6V and 1.195V. -
Page 12: Features
• Ro-HS Compliant GETTING STARTED The LX7180A Evaluation Board is fully assembled and tested to evaluate and demon- strate the features of LX7180A. This board requires the use of an external laboratory power supply and load. For I C operation, the I... - Page 13 ------------ Where: default is determined by the chip (0.6V and 0.9V options available). Note: Check the LX7180A Data Sheet for the Recommended Output Filter Com- ponents table. 2023-2024 Microchip Technology Inc. and its subsidiaries DS50003547B-page 13...
- Page 14 = 3 x 22 μF. 50 mV/div CH2 Offset = 0.6V 1A/div 40 μs/div FIGURE 2-4: LX7180A, Load Step Response, I = 2A to 4A, L = 0.47 μH, LOAD = 22 μF. 2023-2024 Microchip Technology Inc. and its subsidiaries DS50003547B-page 14...
- Page 15 50 mV/div CH2 Offset = 0.6V 2A/div 4 μs/div 5V/div FIGURE 2-6: LX7180A, Load Step Response, I = 2A to 4A, L = 0.47 μH, LOAD = 22 μF, Falling Edge. 2023-2024 Microchip Technology Inc. and its subsidiaries DS50003547B-page 15...
- Page 16 = 22 μF. 2.3.1.5 C PULL-UP VOLTAGE SELECTION The LX7180A Evaluation Board is equipped with a jumper (JP2) for selecting the I pull-up supply voltage. The J2 header can be used to select the I C pull-up voltage to either V or V .
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Page 17: Chapter 3. Gui Installation And Operation
If required, the installation can be stopped by pressing the Cancel button. 5. In the Welcome to the I C Monitor Setup Wizard window, click the Next button to start the installation. 2023-2024 Microchip Technology Inc. and its subsidiaries DS50003547B-page 17... - Page 18 LX7180A Evaluation Board User’s Guide FIGURE 3-1: Starting the I C Monitor GUI Installation. 6. Read the Software License Agreement, check the box for agreement, then click the Next button. FIGURE 3-2: License Agreement. 2023-2024 Microchip Technology Inc. and its subsidiaries DS50003547B-page 18...
- Page 19 7. The installation path can be changed, although it is recommended to keep the default path. Click Next to continue. FIGURE 3-3: Selecting the Destination Folder. 8. To confirm installation, click the Next button to start the installation. FIGURE 3-4: Confirm Installation. 2023-2024 Microchip Technology Inc. and its subsidiaries DS50003547B-page 19...
- Page 20 10. Once the installation is complete, click Close to end the installation. To start the GUI, either click the desktop icon or browse for “I C Monitor” in the Windows Search bar. FIGURE 3-6: The Installation Complete Window. 2023-2024 Microchip Technology Inc. and its subsidiaries DS50003547B-page 20...
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Page 21: Chapter 4. Gui Description
Board included in the kit. NOTICE This chapter provides information regarding the use of the GUI that applies only for the LX7180A device. For other devices using the I C Monitor GUI, refer to their specific Data Sheets and User's Guides. -
Page 22: The Graphical User Interface (Gui)
Custom Board Menu. 4.2.4 C Monitor Status and Control Bar The “Status and Control” bar contains the items listed in Table 4-1. FIGURE 4-4: C Monitor Status and Control Bar. 2023-2024 Microchip Technology Inc. and its subsidiaries DS50003547B-page 22... - Page 23 Update register area. Register Area This section shows the current status of the registers address and their content. The specific registers for LX7180A are described in Appendix C. “LX7180A Control Register Bit Definition”. 2023-2024 Microchip Technology Inc. and its subsidiaries...
- Page 24 C “Programmable Features” area contains the items listed in Table 4-3. FIGURE 4-6: LX7180A I C Programmable Features, Resistive Divider Disabled. FIGURE 4-7: LX7180A I C Programmable Features, Resistive Divider Enabled. 2023-2024 Microchip Technology Inc. and its subsidiaries DS50003547B-page 24...
- Page 25 This check box allows to enable/disable the Input Overvoltage Protection. If the box is checked, when the Over Voltage Rising Threshold (see LX7180A Data Sheet, Electrical Characteristics table) is exceeded, the output is immediately shut off to protect against permanent damage. If the box is unchecked, the device will continue to operate even after the Over Voltage Rising Threshold is exceeded.
- Page 26 200 mV/div 40 μs/div 40 μs/div Target Output Voltage Output Voltage Slew Rate = 5 mV/μs Reverse (Output -> Target) box checked 200 mV/div 20 ms/div FIGURE 4-8: Output Voltage Transitions. 2023-2024 Microchip Technology Inc. and its subsidiaries DS50003547B-page 26...
- Page 27 GUI Description 4.2.7 LX7180A I C Diagnostic The LX7180A Diagnostic area contains the items listed in Table 4-4. FIGURE 4-9: LX7180A I C Diagnostic Area. TABLE 4-4: LX7180A I C DIAGNOSTIC AREA Panel Items Description Status Power Good OK This box indicates green if the output voltage has reached 90% of its set value.
- Page 28 LX7180A Evaluation Board User’s Guide NOTES: 2023-2024 Microchip Technology Inc. and its subsidiaries DS50003547B-page 28...
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Page 29: Appendix A. Schematic And Layouts
LX7180A EVALUATION BOARD USER’S GUIDE Appendix A. Schematic and Layouts INTRODUCTION This appendix contains the following schematic and layouts for the LX7180A Evalua- tion Board: • Board – Schematic • Board – Top Copper and Silk Layer • Board – Signal Layer 1 •... -
Page 30: Board - Schematic
BOARD – SCHEMATIC... -
Page 31: Board - Top Copper And Silk Layer
Schematic and Layouts BOARD – TOP COPPER AND SILK LAYER BOARD – SIGNAL LAYER 1 2023-2024 Microchip Technology Inc. and its subsidiaries DS50003547B-page 31... -
Page 32: Board - Signal Layer 2
LX7180A Evaluation Board User’s Guide BOARD – SIGNAL LAYER 2 BOARD – BOTTOM COPPER AND SILK 2023-2024 Microchip Technology Inc. and its subsidiaries DS50003547B-page 32... -
Page 33: Appendix B. Bill Of Materials
04-11729 Printed Circuit Board Note 1: The components listed in this Bill of Materials are representative of the PCB assembly. The released BOM used in manufacturing uses all RoHS-compliant components. 2023-2024 Microchip Technology Inc. and its subsidiaries DS50003547B-page 33... - Page 34 - ECG ERJ-3EKF2403V SMD, 0603 Note 1: The components listed in this Bill of Materials are representative of the PCB assembly. The released BOM used in manufacturing uses all RoHS-compliant components. 2023-2024 Microchip Technology Inc. and its subsidiaries DS50003547B-page 34...
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Page 35: Appendix C. Lx7180A Control Register Bit Definition
LX7180A EVALUATION BOARD USER’S GUIDE Appendix C. LX7180A Control Register Bit Definition TABLE C-1: LX7180A CONTROL REGISTER BIT DEFINITION Name Value Description Status, Address 00h Reserved Latched to 1 if the over current limit is reached. Write a ‘1’ to reset the status flag. - Page 36 011-d V slews at 5 mV/μs; this is the default setting. SLEW slews at 10 mV/μs. slews at 20 mV/μs. slews at 40 mV/μs. Single Step Mode: No slew rate limiting. 2023-2024 Microchip Technology Inc. and its subsidiaries DS50003547B-page 36...
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Page 37: Worldwide Sales And Service
Tel: 46-31-704-60-40 Tel: 631-435-6000 Sweden - Stockholm San Jose, CA Tel: 46-8-5090-4654 Tel: 408-735-9110 UK - Wokingham Tel: 408-436-4270 Tel: 44-118-921-5800 Canada - Toronto Fax: 44-118-921-5820 Tel: 905-695-1980 Fax: 905-695-2078 2023-2024 Microchip Technology Inc. and its subsidiaries DS50003547B-page 37...
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