Microchip MIC33M656 User Manual
MIC33M656
Evaluation Board
User’s Guide
2019 Microchip Technology Inc. DS50002914A
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and may be superseded by updates.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.
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OTHERWISE, RELATED TO THE INFORMATION,
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Trademarks
The Microchip name and logo, the Microchip logo, Adaptec,
AnyRate, AVR, AVR logo, AVR Freaks, BesTime, BitCloud, chipKIT,
chipKIT logo, CryptoMemory, CryptoRF, dsPIC, FlashFlex,
flexPWR, HELDO, IGLOO, JukeBlox, KeeLoq, Kleer, LANCheck,
LinkMD, maXStylus, maXTouch, MediaLB, megaAVR, Microsemi,
Microsemi logo, MOST, MOST logo, MPLAB, OptoLyzer,
PackeTime, PIC, picoPower, PICSTART, PIC32 logo, PolarFire,
Prochip Designer, QTouch, SAM-BA, SenGenuity, SpyNIC, SST,
SST Logo, SuperFlash, Symmetricom, SyncServer, Tachyon,
TempTrackr, TimeSource, tinyAVR, UNI/O, Vectron, and XMEGA
are registered trademarks of Microchip Technology Incorporated in
the U.S.A. and other countries.
APT, ClockWorks, The Embedded Control Solutions Company,
EtherSynch, FlashTec, Hyper Speed Control, HyperLight Load,
IntelliMOS, Libero, motorBench, mTouch, Powermite 3, Precision
Edge, ProASIC, ProASIC Plus, ProASIC Plus logo, Quiet-Wire,
SmartFusion, SyncWorld, Temux, TimeCesium, TimeHub,
TimePictra, TimeProvider, Vite, WinPath, and ZL 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, BlueSky, BodyCom, CodeGuard,
CryptoAuthentication, CryptoAutomotive, CryptoCompanion,
CryptoController, dsPICDEM, dsPICDEM.net, Dynamic Average
Matching, DAM, ECAN, EtherGREEN, In-Circuit Serial
Programming, ICSP, INICnet, Inter-Chip Connectivity, JitterBlocker,
KleerNet, KleerNet logo, memBrain, Mindi, MiWi, MPASM, MPF,
MPLAB Certified logo, MPLIB, MPLINK, MultiTRAK, NetDetach,
Omniscient Code Generation, PICDEM, PICDEM.net, PICkit,
PICtail, PowerSmart, PureSilicon, QMatrix, 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.
The Adaptec logo, Frequency on Demand, Silicon Storage
Technology, and Symmcom are registered trademarks 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.
© 2019, Microchip Technology Incorporated, All Rights Reserved.
For information regarding Microchip’s Quality Management Systems,
please visit www.microchip.com/quality.
ISBN: 978-1-5224-5089-4
DS50002914A-page 2 2019 Microchip Technology Inc.
MIC33M656
EVALUATION BOARD
USER’S GUIDE
Table of Contents
Preface ........................................................................................................................... 5
Introduction............................................................................................................ 5
Document Layout .................................................................................................. 5
Conventions Used in this Guide ............................................................................ 6
Recommended Reading........................................................................................ 7
The Microchip Website .......................................................................................... 7
Product Change Notification Service..................................................................... 7
Customer Support ................................................................................................. 7
Document Revision History ................................................................................... 7
Chapter 1. Product Overview........................................................................................ 9
1.1 Introduction ..................................................................................................... 9
1.2 MIC33M656 Short Overview .......................................................................... 9
1.3 What is the MIC33M656 Evaluation Board? ................................................ 10
1.4 Contents of the MIC33M656 Evaluation Board Kit ....................................... 10
Chapter 2. Installation and Operation ........................................................................ 11
2.1 Introduction ................................................................................................... 11
2.2 Features ....................................................................................................... 12
2.3 Getting Started ............................................................................................. 12
Chapter 3. GUI Installation and Operation................................................................. 17
3.1 Getting Started ............................................................................................. 17
3.2 Graphical User Interface Installation ............................................................ 17
2
3.3 I
C Monitor Graphical User Interface Uninstall ............................................ 20
Chapter 4. GUI Description ......................................................................................... 21
4.1 Introduction ................................................................................................... 21
4.2 The Graphical User Interface ....................................................................... 22
Appendix A. Schematic and Layouts......................................................................... 29
A.1 Introduction .................................................................................................. 29
A.2 Board – Schematic ....................................................................................... 30
A.3 Board – Top Silk .......................................................................................... 31
A.4 Board – Top Copper and Silk ....................................................................... 31
A.5 Board – Top Copper .................................................................................... 32
A.6 Board – Signal Layer 1 ................................................................................ 32
A.7 Board – Signal Layer 2 ................................................................................ 33
A.8 Board – Bottom Copper ............................................................................... 33
A.9 Board – Bottom Copper and Silk ................................................................. 34
A.10 Board – Bottom Silk ................................................................................... 34
2019 Microchip Technology Inc. DS50002914A-page 3
MIC33M656 Evaluation Board User’s Guide
Appendix B. Bill of Materials (BOM) ...........................................................................35
Appendix C. MIC33M656 Internal Registers...............................................................37
C.1 Register Map and I2C Programmability ....................................................... 37
Worldwide Sales and Service .....................................................................................42
DS50002914A-page 4 2019 Microchip Technology Inc.
MIC33M656
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
Select the Help menu, and then Topics, to open a list of available online help files.
®
IDE online help.
INTRODUCTION
This chapter contains general information that will be useful to know before using the
MIC33M656 Evaluation Board. Items discussed in this chapter include:
• Document Layout
• Conventions Used in this Guide
• Recommended Reading
• The Microchip Website
• Product Change Notification Service
• Customer Support
• Document Revision History
DOCUMENT LAYOUT
This document describes how to use the MIC33M656 Evaluation Board as a
development tool. The manual layout is as follows:
• Chapter 1. “Product Overview” – Important information about the MIC33M656
device.
• Chapter 2. “Installation and Operation” – Includes instructions on how to get
started with the MIC33M656 Evaluation Board and a description of each function.
• Chapter 3. “GUI Installation and Operation” – Includes instructions on how to
install the Graphical User Interface (GUI).
• Chapter 4. “GUI Description” – Describes the items included in the Graphical
User Interface.
• Appendix A. “Schematic and Layouts” – Shows the schematic and PCB layout
diagrams for the MIC33M656 Evaluation Board.
• Appendix B. “Bill of Materials (BOM)” – Lists the parts used to build the
MIC33M656 Evaluation Board.
• Appendix C. “MIC33M656 Internal Registers” – Describes the MIC33M656
device’s internal registers.
2019 Microchip Technology Inc. DS50002914A-page 5
MIC33M656 Evaluation Board User’s Guide
CONVENTIONS USED IN THIS GUIDE
This manual uses the following documentation conventions:
DOCUMENTATION CONVENTIONS
Description Represents Examples
Arial font:
Italic characters Referenced books MPLAB® IDE User’s Guide
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
Underlined, italic text with
right angle bracket
Bold characters A dialog button Click OK
N‘Rnnnn A number in verilog format,
Text in angle brackets < > A key on the keyboard Press <Enter>, <F1>
Courier New font:
Plain Courier New Sample source code #define START
Italic Courier New A variable argument file.o, where file can be
Square brackets [ ] Optional arguments mcc18 [options] file
Curly brackets and pipe
character: { | }
Ellipses... Replaces repeated text var_name [,
A menu path File>Save
A tab Click the Power tab
where N is the total number of
digits, R is the radix and n is a
digit.
Filenames autoexec.bat
File paths c:\mcc18\h
Keywords _asm, _endasm, static
Command-line options -Opa+, -Opa-
Bit values 0, 1
Constants 0xFF, ‘A’
Choice of mutually exclusive
arguments; an OR selection
Represents code supplied by
user
“Save project before build”
4‘b0010, 2‘hF1
any valid filename
[options]
errorlevel {0|1}
var_name...]
void main (void)
{ ...
}
DS50002914A-page 6 2019 Microchip Technology Inc.
RECOMMENDED READING
This user’s guide describes how to use the MIC33M656 Evaluation Board. Other
useful documents are listed below. The following Microchip document is available and
recommended as a supplemental reference resource:
• MIC33M656 Data Sheet – “6A, Power Module Buck Converter with
HyperLight Load
THE MICROCHIP WEBSITE
Microchip provides online support via our website at www.microchip.com. This website
is used as a means to make files and information easily available to customers.
Accessible by using your favorite Internet browser, the website 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
®
and I2C Interface” (DS20006256)
Preface
PRODUCT CHANGE NOTIFICATION SERVICE
Microchip’s customer notification service helps keep customers current on Microchip
products. Subscribers will receive e-mail 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 website 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 website at:
http://www.microchip.com/support.
DOCUMENT REVISION HISTORY
Revision A (September 2019)
• Initial Release of this Document.
2019 Microchip Technology Inc. DS50002914A-page 7
MIC33M656 Evaluation Board User’s Guide
NOTES:
DS50002914A-page 8 2019 Microchip Technology Inc.
Chapter 1. Product Overview
C3
47 µF
C4
47 µF
V
OUT
Enable
V
IN
2.4V to 5.5V
C
10 µF
1.0V/6A
V
IN
SCL
SDA
PG
SW
MIC33M656
OUT
V
OUT
PGND
AGND
PG
SCL
SDA
EN
PV
IN
AUX_PV
IN
SV
IN
SW
AUX_GND
1.1 INTRODUCTION
This chapter provides an overview of the MIC33M656 Evaluation Board and covers the
following topics:
• MIC33M656 Short Overview
• What is the MIC33M656 Evaluation Board?
• Contents of the MIC33M656 Evaluation Board Kit
1.2 MIC33M656 SHORT OVERVIEW
The MIC33M656 is an I2C programmable, high-efficiency, low-voltage input,
6A current, synchronous step-down regulator power module with integrated inductor.
The Constant-On-Time (COT) control architecture with HyperLight Load
vides very high efficiency at light loads, while still having ultra-fast transient response.
The user can program, via the I
voltage, on-time, soft start slope, high-side current limit, HLL or Forced PWM mode of
operation. The 2.4V to 5.5V input voltage range, low shutdown and quiescent currents
make the MIC33M656 ideal for single-cell Li-Ion, battery-powered applications.
An open-drain Power Good (PG) output is provided to indicate when the output voltage
is within 9% of regulation, and facilitates output voltage monitoring and sequencing.
When set in Shutdown mode (EN = GND), the current consumption of MIC33M656 is
reduced to 1.5 µA (typical).
The MIC33M656 is available in a thermally efficient, 53-Lead, 6 mm x 10 mm x 3 mm
QFN package, with an operating junction temperature range from -40°C to +125°C.
More detailed information regarding the capabilities of the MIC33M656 are available in
the “MIC33M656 Data Sheet”.
MIC33M656
EVALUATION BOARD
USER’S GUIDE
®
(HLL) pro-
2
C interface, various parameters, such as output
FIGURE 1-1: Typical MIC33M656 Step-Down Application.
2019 Microchip Technology Inc. DS50002914A-page 9
MIC33M656 Evaluation Board User’s Guide
1.3 WHAT IS THE MIC33M656 EVALUATION BOARD?
The MIC33M656 Evaluation Board is used to evaluate and demonstrate Microchip
Technology’s MIC33M656 device. This Evaluation Board demonstrates the
MIC33M656 in a buck converter application, supplied from an external voltage source
(2.4V-5.5V), with an I
comprehensive control and status reporting with the MIC33M656.
1.4 CONTENTS OF THE MIC33M656 EVALUATION BOARD KIT
The MIC33M656 Evaluation Board kit includes:
• MIC33M656 Evaluation Board (DT100108)
• Important Information Sheet
2
C programmed regulated output. The I2C monitor GUI allows
DS50002914A-page 10 2019 Microchip Technology Inc.
Chapter 2. Installation and Operation
MCP2221
MIC33M656
USB
I/F
V
USB
Data
PWR
V
IN
V
OUT
PWR
SCL
SDA
V
IN
PG
EN
SCL
SDA
PG
EN
Note 2
Note 1
Note 1: Three-way jumper fitted for selection of I2C pull-up voltage.
2: I
2
C bus (SDA, SCL), EN control and PG status via MCP2221 USB bridge.
2.1 INTRODUCTION
The MIC33M656 Evaluation Board has been developed to test the MIC33M656 module
capabilities, including loading up to 6A, control and monitor through the USB interface
(via the I
communication.
MIC33M656
EVALUATION BOARD
USER’S GUIDE
2
C monitor GUI). Pin headers are also fitted for Bode analysis and external I2C
FIGURE 2-1: MIC33M656 Step-Down Regulator with MCP2221 I
2
C Bridge.
2019 Microchip Technology Inc. DS50002914A-page 11
MIC33M656 Evaluation Board User’s Guide
2.2 FEATURES
The MIC33M656 Evaluation Board has the following features:
• Input Voltage Range: 2.4V to 5.5V
• 6A (maximum) Continuous Output Current
• Multiple Faults Indication through I
2
C Programmable:
•I
- Output voltage: 0.6-1.28V, 5 mV resolution
- Slew rate: 0.2-3.2 ms/V
- Switching frequency: up to 2.5 MHz
- High-side current limit: 3.5-10A
- Enable delay: 0.25-3 ms
- Output discharge when disabled
• High Efficiency (up to 95%)
• ±1.5% Output Voltage Accuracy Over Line/Load/Temperature Range
• Safe Start-up with Pre-Biased Output
• Typical 1.5 µA Shutdown Supply Current
• Low Dropout (100% Duty Cycle) Operation
• Ultra-Fast Transient Response
• Latch-Off Thermal Shutdown Protection
• Latch-Off Current Limit Protection
• Power Good Open-Drain Output
2
C
2.3 GETTING STARTED
The MIC33M656 Evaluation Board is fully assembled and tested to evaluate and
demonstrate the MIC33M656 module. This Evaluation Board requires the use of external lab supplies and a PC. The MIC33M656 is offered in four different product options,
depending on the default settings at power-up, prior to any I
differences among the various product options are described in the “MIC33M656 Data
Sheet”. The Evaluation Board carries the HAYMP option, whose default output voltage
is 1.0V. All of the device options may be fitted on the board, as is.
2
C write operation. The
DS50002914A-page 12 2019 Microchip Technology Inc.
Installation and Operation
2.3.1 Power Input and Output Connection
2.3.1.1 POWERING THE MIC33M656 EVALUATION BOARD
When the Evaluation Board is ready for evaluation, apply positive input voltage to the
V
terminal and the corresponding return to the GND_IN terminal. The maximum input
IN
voltage should not exceed 5.5V. An electronic load or resistive load can be used for
evaluation. Some electronic loads can sink the programmed current, starting from very
low output voltage levels during start-up. For a more realistic start-up behavior evaluation, a resistive load or Constant Resistance mode for electronic load is recommended.
Connect the positive voltage terminal of the load to the V
Board and connect the negative or return side of the load to the GND_OUT terminal. If
changing the regulator parameters is required, or simply to monitor the part, make sure
to connect the Micro-USB cable between the Evaluation Board and the PC. Then,
install the GUI according to Chapter 3. “GUI Installation and Operation” and follow
the indications in Chapter 2. “Installation and Operation” for more extensive
evaluation.
Note: The inductance associated with long wires on the board input may cause
voltage spikes at load stepping or start-up into a heavy load. If the spikes
exceed the 5.5V maximum input voltage rating, the MIC33M656 may fail.
This can be prevented by populating a 470
C8 footprint.
terminal on the Evaluation
OUT
µF electrolytic capacitor on the
2.3.1.2 EVALUATION BOARD POWER-UP PROCEDURE
For the power-up procedure, follow the steps bellow:
1. Connect the PC, input supply, voltmeter, ammeter and load as shown in
Figure 2-2. Set the ammeter on a 10A range.
2. Fit a jumper on the EN position across the J6 header, as marked on the
silkscreen.
3. Once the input voltage is greater than 2.35V typical at the board input (V
), the
IN
device begins to switch.
4. The voltmeter should now indicate an output voltage according to the preset
register values. Adjusting the input voltage, temperature or load should not
cause the output to vary more than ±1.5% over the operating range of the
converter.
5. Set the input voltage and the load to the desired values, with a maximum of 5.5V
on the input voltage and a maximum load of 6A.
6. Adjust the regulator output and monitor the STATUS Register, as described in
Chapter 4. “GUI Description”.
7. Optionally, for more advanced readings, place Oscilloscope Probe 1 in the “SW”
test point to monitor the switching waveforms and Probe 2 on the output header
to measure the AC ripple of the output voltage. Please note that for a more accurate output voltage ripple measurement, probing is facilitated by the availability
of test points for probe tip and ground spring connections close to the output
capacitor. A U.FL connector is also available for the same purpose.
2019 Microchip Technology Inc. DS50002914A-page 13
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