ADM00864

MIC2800 Evaluation Board User’s Guide  2017 Microchip Technology Inc. DS50002656A Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property. • Microchip is willing to work with the customer who is concerned about the integrity of their code. • Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as “unbreakable.” Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act. Information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer’s risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights unless otherwise stated. Microchip received ISO/TS-16949:2009 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India. The Company’s quality system processes and procedures are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001:2000 certified. QUALITY MANAGEMENT SYSTEM CERTIFIED BY DNV Trademarks The Microchip name and logo, the Microchip logo, AnyRate, AVR, AVR logo, AVR Freaks, BeaconThings, BitCloud, CryptoMemory, CryptoRF, dsPIC, FlashFlex, flexPWR, Heldo, JukeBlox, KEELOQ, KEELOQ logo, Kleer, LANCheck, LINK MD, maXStylus, maXTouch, MediaLB, megaAVR, MOST, MOST logo, MPLAB, OptoLyzer, PIC, picoPower, PICSTART, PIC32 logo, Prochip Designer, QTouch, RightTouch, SAM-BA, SpyNIC, SST, SST Logo, SuperFlash, tinyAVR, UNI/O, and XMEGA are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. ClockWorks, The Embedded Control Solutions Company, EtherSynch, Hyper Speed Control, HyperLight Load, IntelliMOS, mTouch, Precision Edge, and Quiet-Wire are registered trademarks of Microchip Technology Incorporated in the U.S.A. Adjacent Key Suppression, AKS, Analog-for-the-Digital Age, Any Capacitor, AnyIn, AnyOut, BodyCom, chipKIT, chipKIT logo, CodeGuard, CryptoAuthentication, CryptoCompanion, CryptoController, dsPICDEM, dsPICDEM.net, Dynamic Average Matching, DAM, ECAN, EtherGREEN, In-Circuit Serial Programming, ICSP, Inter-Chip Connectivity, JitterBlocker, KleerNet, KleerNet logo, Mindi, MiWi, motorBench, MPASM, MPF, MPLAB Certified logo, MPLIB, MPLINK, MultiTRAK, NetDetach, Omniscient Code Generation, PICDEM, PICDEM.net, PICkit, PICtail, PureSilicon, QMatrix, RightTouch logo, REAL ICE, Ripple Blocker, SAM-ICE, Serial Quad I/O, SMART-I.S., SQI, SuperSwitcher, SuperSwitcher II, Total Endurance, TSHARC, USBCheck, VariSense, ViewSpan, WiperLock, Wireless DNA, and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. Silicon Storage Technology is a registered trademark of Microchip Technology Inc. in other countries. 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. © 2017, Microchip Technology Incorporated, All Rights Reserved. ISBN: 978-1-5224-2361-4 == ISO/TS 16949 == DS50002656A-page 2  2017 Microchip Technology Inc. MIC2800 EVALUATION BOARD USER’S GUIDE Table of Contents Preface ........................................................................................................................... 6 Introduction............................................................................................................ 6 Document Layout .................................................................................................. 6 Conventions Used in this Guide ............................................................................ 7 Warranty Registration............................................................................................ 7 Recommended Reading........................................................................................ 8 The Microchip Web Site ........................................................................................ 8 Product Change Notification Service..................................................................... 8 Customer Support ................................................................................................. 8 Document Revision History ................................................................................... 8 Chapter 1. Product Overview 1.1 Introduction ................................................................................................... 10 1.2 MIC2800 Device Short Overview ................................................................. 10 1.3 MIC2800 Evaluation Board Overview .......................................................... 11 1.4 MIC2800 Evaluation Board Kit Contents ...................................................... 12 Chapter 2. Installation and Operation 2.1 Introduction ................................................................................................... 14 2.2 Getting Started ............................................................................................ 14 2.3 Evaluation Board Description ....................................................................... 15 Appendix A. Schematic and Layouts A.1 Introduction .................................................................................................. 18 A.2 Board – Schematic ....................................................................................... 19 A.3 Board – Top Silk .......................................................................................... 20 A.4 Board – Top Copper and Silk ....................................................................... 21 A.5 Board – Top Copper .................................................................................... 22 A.6 Board – Bottom Copper ............................................................................... 23 A.7 Board – Bottom Copper and Silk ................................................................. 24 A.8 Board – Bottom Silk ..................................................................................... 25 Appendix B. Bill of Materials (BOM)........................................................................... 26 Worldwide Sales and Service .................................................................................... 28  2017 Microchip Technology Inc. DS50002656A-page 3 MIC2800 Evaluation Board User’s Guide NOTES: DS50002656A-page 4  2017 Microchip Technology Inc. MIC2800 EVALUATION BOARD USER’S GUIDE Preface NOTICE TO CUSTOMERS All documentation becomes dated, and this manual is no exception. Microchip tools and documentation are constantly evolving to meet customer needs, so some actual dialogs and/or tool descriptions may differ from those in this document. Please refer to our website (www.microchip.com) to obtain the latest documentation available. Documents are identified with a “DS” number. This number is located on the bottom of each page, in front of the page number. The numbering convention for the DS number is “DSXXXXXXXXA”, where “XXXXXXXX” is the document number and “A” is the revision level of the document. For the most up-to-date information on development tools, see the MPLAB® IDE online help. Select the Help menu, and then Topics, to open a list of available online help files. INTRODUCTION This chapter contains general information that will be useful to know before using the MIC2800 Evaluation Board. Items discussed in this chapter include: • • • • • • • Document Layout Conventions Used in this Guide Warranty Registration Recommended Reading The Microchip Web Site Customer Support Document Revision History DOCUMENT LAYOUT This document describes how to use the MIC2800 Evaluation Board as a development tool to emulate and debug firmware on a target board. The manual layout is as follows: • Chapter 1. “Product Overview” – Important information about the MIC2800 Evaluation Board. • Chapter 2. “Installation and Operation” – Includes instructions on installing and starting the Microchip Chip Manager application. • Appendix A. “Schematic and Layouts” – Shows the schematic and layout diagrams for the MIC2800 Evaluation Board. • Appendix B. “Bill of Materials (BOM)” – Lists the parts used to build the MIC2800 Evaluation Board.  2017 Microchip Technology Inc. DS50002656A-page 5 MIC2800 Evaluation Board User’s Guide CONVENTIONS USED IN THIS GUIDE This manual uses the following documentation conventions: DOCUMENTATION CONVENTIONS Description Represents Examples Arial font: MPLAB® IDE User’s Guide Italic characters Referenced books Emphasized text ...is the only compiler... Initial caps A window the Output window A dialog the Settings dialog A menu selection select Enable Programmer Quotes A field name in a window or dialog “Save project before build” Underlined, italic text with right angle bracket A menu path File>Save Bold characters A dialog button Click OK A tab Click the Power tab N‘Rnnnn A number in verilog format, 4‘b0010, 2‘hF1 where N is the total number of digits, R is the radix and n is a digit. Text in angle brackets < > A key on the keyboard Press , Sample source code #define START Filenames autoexec.bat File paths c:\mcc18\h Keywords _asm, _endasm, static Command-line options -Opa+, -Opa- Bit values 0, 1 Courier New font: Plain Courier New DS50002656A-page 6 Constants 0xFF, ‘A’ Italic Courier New A variable argument file.o, where file can be any valid filename Square brackets [ ] Optional arguments mcc18 [options] file [options] Curly brackets and pipe character: { | } Choice of mutually exclusive arguments; an OR selection errorlevel {0|1} Ellipses... Replaces repeated text var_name [, var_name...] Represents code supplied by user void main (void) { ... }  2017 Microchip Technology Inc. Preface RECOMMENDED READING This user’s guide describes how to use the MIC2800 Evaluation Board. Another useful document is listed below. The following Microchip document is available and recommended as a supplemental reference resource: MIC2800 Data Sheet – “Digital Power Management IC 2 MHz, 600 mA DC/DC with Dual 300 mA/300 mA Low VIN LDOs” (DS20005839A) THE MICROCHIP WEB SITE Microchip provides online support via our web site at www.microchip.com. This web site is used as a means to make files and information easily available to customers. Accessible by using your favorite Internet browser, the web site contains the following information: • Product Support – Data sheets and errata, application notes and sample programs, design resources, user’s guides and hardware support documents, latest software releases and archived software • General Technical Support – Frequently Asked Questions (FAQs), technical support requests, online discussion groups, Microchip consultant program member listing • Business of Microchip – Product selector and ordering guides, latest Microchip press releases, listing of seminars and events, listings of Microchip sales offices, distributors and factory representatives PRODUCT CHANGE NOTIFICATION SERVICE Microchip’s customer notification service helps keep customers current on Microchip products. Subscribers will receive email notifications whenever there are changes, updates, revisions or errata related to a specified product family or development tool of interest. To register, access the Microchip web site at www.microchip.com, click on Product Change Notification and follow the registration instructions. CUSTOMER SUPPORT Users of Microchip products can receive assistance through several channels: • • • • Distributor or Representative Local Sales Office Field Application Engineer (FAE) Technical Support Customers should contact their distributor, representative or field application engineer (FAE) for support. Local sales offices are also available to help customers. A listing of sales offices and locations is included in the back of this document. Technical support is available through the web site at: http://www.microchip.com/support DOCUMENT REVISION HISTORY Revision A (November 2017) • Initial Release of this Document.  2017 Microchip Technology Inc. DS50002656A-page 7 MIC2800 Evaluation Board User’s Guide NOTES: DS50002656A-page 8  2017 Microchip Technology Inc. MIC2800 EVALUATION BOARD USER’S GUIDE Chapter 1. Product Overview 1.1 INTRODUCTION This chapter provides an overview of the MIC2800 Evaluation Board and covers the following topics: • MIC2800 Device Short Overview • MIC2800 Evaluation Board Overview • MIC2800 Evaluation Board Kit Contents 1.2 MIC2800 DEVICE SHORT OVERVIEW 1.2.1 MIC2800 Key Features The key features of the MIC2800 include: • 2.7V to 5.5V input voltage range • 2 MHz DC/DC converter and two LDOs - LDO1 is powered from DC/DC converter for highest efficiency - LDO2 is powered directly from VIN • Integrated power-on reset (AND function for all outputs) • Adjustable delay time • LOWQ mode for DC/DC and LDOs • 30 µA Total IQ when in LOWQ mode • Thermal Shutdown Protection • Current Limit Protection • Tiny 16-pin 3 mm x 3 mm QFN package DC to DC Converter • • • • • Output current to 600 mA in PWM mode LOWQ Mode: NO NOISE Light load mode 75 µVRMS output noise in LOWQ mode 2 MHz PWM operation in normal mode >90% efficiency LDOs • LDO1: input voltage directly connected to DC/DC converter output voltage for maximum efficiency - Ideal for 1.8V to 1.5V conversion - 300 mA output current from 1.8V input - Output voltage down to 0.8V • LDO2: 300 mA output current capable  2017 Microchip Technology Inc. DS50002656A-page 9 MIC2800 Evaluation Board User’s Guide 1.2.2 MIC2800 Device Overview The MIC2800 device is a high-performance power management IC, giving three output voltages with maximum efficiency. Combining a 2 MHz DC/DC converter with an LDO regulator (LDO1), the MIC2800 gives two high-efficiency outputs (DC/DC and LDO1), combined with the flexibility of a third output, a 300 mA LDO (LDO2). The MIC2800 features a LOWQ mode, reducing the total current draw in this mode to less than 30 µA. In LOWQ mode, the output noise of the DC to DC converter is 75 µVRMS, significantly lower than other converters which use a PFM light load mode that can interfere with sensitive RF circuitry. The DC to DC converter uses small values of the inductor and capacitors to reduce board space, but still retains efficiencies over 90%, at load currents up to 600 mA. The MIC2800 is a µCap design, operating with very small ceramic output capacitors and inductors for stability, reducing required board space and component cost and it is available in fixed output voltages in the 16-pin 3 mm x 3 mm QFN lead-free package. FIGURE 1-1: 1.3 MIC2800 Typical Application Circuit. MIC2800 EVALUATION BOARD OVERVIEW The MIC2800 Evaluation Board has been developed to evaluate the capabilities of the MIC2800 multi-output (DC-DC and 2 x LDO) device. The board is populated with the MIC2800-G1JS device and it is set to the following voltages: • VOUT1 (DC-DC Buck converter): 1.8V • VOUT2 (LDO1): 1.25V • VOUT3 (LDO2): 3.3V The MIC2800-G1JS allows support of the SAMA5D2 family MPUs when operating off a 5V input rail. However, by populating the board with another MIC2800 IC voltage option, other power supply solutions can be demonstrated. The MIC2800 Evaluation Board features independent Enable connectors (EN1 and EN2). To disable the regulators, a jumper must be placed on J1 (to disable the DC/DC converter and LDO1) or to J2 (to disable LDO2). Since it is not recommended to leave EN pins floating, the MIC2800 Evaluation Board features 100 kΩ pull-up resistors, so the default value when the board is powered is ON. DS50002656A-page 10  2017 Microchip Technology Inc. Product Overview The MIC2800 Evaluation Board also features a LOWQ pin to switch the functionality of the DC/DC converter. When the LOWQ is logic high (>1V), the DC/DC converter works in PWM mode (normal operation mode with 600 mA output current capability). When the LOWQ is logic low (2.7V is applied. To disable the device, apply a voltage of 0V to the EN1, EN2 terminals (J1 and/or J2). 5. Power-on Reset (POR) test point is provided to monitor the POR function (J10). The power-on reset output will go high after all the output voltages have reached 96% of their nominal voltage and will go low as son as one of the output voltages go below 91% of its nominal voltage. The POR flag has programmable assertion delay set by the capacitor placed on CSET pin to ground. 6. The inductance associated with long wires between the power supply and the board input may cause voltage spikes at load stepping, start-up into heavy loads or hot wire plug conditions. If the spikes exceed 6V absolute maximum input voltage, the MIC2800 may fail. This behavior is prevented by C9 capacitor (100µF Al-Electrolytic capacitor) by absorbing voltage spikes.  2017 Microchip Technology Inc. DS50002656A-page 13 MIC2800 Evaluation Board User’s Guide VOUT2 LDO1 VOUT3 LDO2 VOUT1 BUCK POWER SUPPLY FIGURE 2-1: 2.3 MIC2800 Evaluation Board – Test Points Description. EVALUATION BOARD DESCRIPTION 2.3.1 Power-on Reset Pull-up Resistor The MIC2800 Evaluation Board offers the possibility of connecting the POR pin to either VIN or VOUT3 (LDO2, 3.3V) by using J4. This provides the flexibility for direct interfacing with 3.3V systems or directly to VIN when the 3.3V rail is disabled. 2.3.2 Power-on Reset Capacitor (C7) The MIC2800 has a programmable POR delay set by placing a capacitor on the CSET pin. This pin is a current source output that charges a capacitor that sets the delay time for the POR output, from low to high. The current source of 1.25 µA charges a capacitor up from 0V. When the capacitor reaches 1.25V, the output of the POR is allowed to go high. The delay time in microseconds is equal to the CSET capacitor in picofarads (Equation 2-1). EQUATION 2-1: PORDelay  uS  = CSET  pF  2.3.3 LOWQ Mode MIC2800 is 2 MHz 600 mA DC/DC converter with two integrated 300 mA LDOs. This design combines good overall efficiency with low output noise. However, the DC/DC converter is always switching in PWM mode. To reduce quiescent current in light-load conditions, the MIC2800 features a LOWQ pin. In this mode, the DC/DC converter is disabled and the output voltage is provided by a low noise linear regulator (LDO) capable of supplying 60 mA to the load. In this mode, the other linear regulators (LDO1 and LDO2) will also be internally limited to 10 mA. DS50002656A-page 14  2017 Microchip Technology Inc. Installation and Operation 2.3.4 Using Fixed and Adjustable Voltage Options The MIC2800 Evaluation Board is designed for both fixed and adjustable options. Resistors R1 and R2 are used for setting the output voltage of the adjustable option of the DC/DC converter: R1 is the top voltage divider resistor and R2 is the bottom voltage divider resistor. The feedback voltage is 0.8V (nominal) and the output voltage can be adjusted from 1V to 2V. Note that LDO1 is powered from the DC/DC converter's output, so in order for LDO1 to maintain good regulation, the DC/DC output voltage should be minimum VDCDC - VDO. 2.3.5 Output Noise and Ripple Measurements The MIC2800 Evaluation Board is populated with headers used for measuring output noise and ripple on both the DC/DC converter and the LDOs (J5, J8 and J9). Each connector is designed to probe the output signal using the local ground as reference. This is the proper way of measuring low-amplitude ripple signals because it eliminates any noise caused by long oscilloscope ground leads or ground plane noise. 2.3.6 Board Layout Considerations It is recommended that the connection between the GND pins of the MIC2800 and GND terminals of the input capacitors is kept on the TOP of the PCB and no vias should be placed between them. This will improve transient behavior and decrease noise. It is also recommended that the TOP GND plane should extend under the device for optimal noise performance.  2017 Microchip Technology Inc. DS50002656A-page 15 MIC2800 Evaluation Board User’s Guide NOTES: DS50002656A-page 16  2017 Microchip Technology Inc. MIC2800 EVALUATION BOARD USER’S GUIDE Appendix A. Schematic and Layouts A.1 INTRODUCTION This appendix contains the following schematics and layouts for the MIC2800 Evaluation Board: • • • • • • • Board – Schematic Board – Top Silk Board – Top Copper and Silk Board – Top Copper Board – Bottom Copper Board – Bottom Copper and Silk Board – Bottom Silk  2017 Microchip Technology Inc. DS50002656A-page 17 BOARD – SCHEMATIC VOUT1 VIN U1 100uF 10V AL-C GND C1 10uF 35V 0603 R7 100k 0603 1% 100k 0603 1% 7 100k 0603 1% EN1 LOWQ EN2 VIN SW 15 EN1 1 LOWQ 16 EN2 FB TP2 C5 C6 0.1uF 16V 0603 GND GND 4 0.1uF 16V 0603 GND GND PGND MIC2800 L1 5 9 LDO1 LDO2 R1 0R 0603 11 GND VOUT3 12 POR 13 CSET 3 SGND C7 0.010uF 25V 0603 GND GND R2 C2 C3 10uF 35V 0603 10uF 35V 0603 GND GND GND 10uF 35V 0603 GND 2 1 2 1 LOWQ GND GND GND 100k 0603 1% J10 POR GND 0.1uF 16V 0603 GND C8 TP3 TP4 GND GND Shunt 2.54mm 1x2 HDR-2.54 Male 1x3 VOUT3 TP6 TP7 TP8 GND GND GND 2.2uF 16V 0603 J4 JP1 3 2 1 R6 2 1 2 1 J3 EN1 C12 C4 DNP J1 EN2 VOUT2 8 VIN J2 VOUT1 J5 2.2uH VOUT2 GND 14 CBYP 2 BIAS 10 J8 VOUT3 J9 2 1 C9 R4 R5 LDO 2 1 TP1 VIN 2 1 6 TP5 GND MIC2800 Evaluation Board User’s Guide DS50002656A-page 18 A.2  2017 Microchip Technology Inc. Schematic and Layouts A.3 BOARD – TOP SILK 
  5,31d  %)/ %d A