Microchip Technology MIC23356, MIC23656 User Manual
MIC23356
Evaluation Board
User’s Guide
2018 Microchip Technology Inc. DS50002834A
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code hopping
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© 2018, Microchip Technology Incorporated, All Rights Reserved.
ISBN: 978-1-5224-4006-2
2018 Microchip Technology Inc. DS50002834A-page 2
MIC23356
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
Customer Support ................................................................................................. 7
Document Revision History ................................................................................... 7
Chapter 1. Product Overview
1.1 Introduction ..................................................................................................... 8
1.2 MIC23356 Short Overview ............................................................................. 8
1.3 What is the MIC23356 Evaluation Board? ..................................................... 9
1.4 Contents of the MIC23356 Evaluation Board Kit ............................................ 9
Chapter 2. Installation and Operation
2.1 Introduction ................................................................................................... 10
2.2 Features ....................................................................................................... 11
2.3 Getting Started ............................................................................................. 11
2.3.1 Power Input and Output Connection ......................................................... 11
Chapter 3. GUI Installation and Operation
3.1 Getting Started ............................................................................................. 16
3.1.1 Required Software ..................................................................................... 16
3.1.2 Required Hardware ................................................................................... 16
3.2 Graphical User Interface Installation ............................................................ 16
2
3.3 I
C Monitor Graphical User Interface Uninstall ............................................ 19
Chapter 4. GUI Description
4.1 Introduction ................................................................................................... 20
4.2 The Graphical User Interface ....................................................................... 21
4.2.1 Device Menu ............................................................................................. 21
4.2.2 File Menu ................................................................................................... 21
4.2.3 Settings Menu ........................................................................................... 21
4.2.4 I2C Monitor Status and Control Bar .......................................................... 21
4.2.5 I2C Generic Register View ........................................................................ 22
4.2.6 MIC23356 I2C Programmable Features .................................................... 23
4.2.7 MIC23356 I2C Diagnostic ......................................................................... 25
Appendix A. Schematic and Layouts
A.1 Introduction .................................................................................................. 27
A.2 Board – Schematic ....................................................................................... 28
2018 Microchip Technology Inc. DS50002834A-page 3
A.3 Board – Top Silk .......................................................................................... 29
A.4 Board – Top Copper and Silk ....................................................................... 29
A.5 Board – Top Copper .................................................................................... 30
A.6 Board – Middle Layer 1 ................................................................................ 30
A.7 Board – Middle layer 2 ................................................................................. 31
A.8 Board – Bottom Copper ............................................................................... 31
A.9 Board – Bottom Copper and Silk ................................................................. 32
A.10 Board – Bottom Silk ................................................................................... 32
Appendix B. Bill of Materials (BOM)
Appendix C. MIC23356 Internal Registers
C.1 Register MAP and I2C programmability ...................................................... 35
Worldwide Sales and Service .................................................................................... 40
2018 Microchip Technology Inc. DS50002834A-page 4
MIC23356
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
“DSXXXXXA”, where “XXXXX” 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 on-line help files.
®
IDE online help.
INTRODUCTION
This chapter contains general information that will be useful to know before using the
MIC23356 Evaluation Board. Items discussed in this chapter include:
• Document Layout
• Conventions Used in this Guide
• Recommended Reading
• The Microchip Website
• Customer Support
• Document Revision History
DOCUMENT LAYOUT
This document describes how to use the MIC23356 Evaluation Board as a
development tool. The manual layout is as follows:
• Chapter 1. “Product Overview” – Important information about the MIC23356.
• Chapter 2. “Installation and Operation” – Includes instructions on how to get
started with the MIC23356 Evaluation Board and a description of each function.
• Chapter 3. “GUI Installation and Operation” – Includes instructions on how to
install the Graphical User Interface.
• Chapter 4. “GUI Description” – Describes the items in the Graphical User
Interface
• Appendix A. “Schematic and Layouts” – Shows the schematic and layout
diagrams for the MIC23356.
• Appendix B. “Bill of Materials (BOM)” – Lists the parts used to build the
MIC23356 Evaluation Board.
• Appendix C. “MIC23356 Internal Registers” – Describes the internal registers.
2018 Microchip Technology Inc. DS50002834A-page 5
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
Initial caps A window the Output window
Quotes A field name in a window or
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 [,
Preface
Emphasized text ...is the only compiler...
A dialog the Settings dialog
A menu selection select Enable Programmer
“Save project before build”
dialog
A menu path File>Save
A tab Click the Power tab
4‘b0010, 2‘hF1
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’
any valid filename
[options]
Choice of mutually exclusive
arguments; an OR selection
Represents code supplied by
user
errorlevel {0|1}
var_name...]
void main (void)
{ ...
}
2018 Microchip Technology Inc. DS50002834A-page 6
RECOMMENDED READING
This user’s guide describes how to use the MIC23356 Evaluation Board. Another
useful document is listed below. The following Microchip document is available and
recommended as a supplemental reference resource:
• MIC23356 Data Sheet - “3A, Step-Down Converter with HyperLight Load™
2
and I
C Interface” (DS20006130)
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
Preface
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 (December 2018)
• Initial release of this document
2018 Microchip Technology Inc. DS50002834A-page 7
Chapter 1. Product Overview
SW
PG
V
IN
EN
MIC23356
V
OUT
P
GND
A
GND
V
OUT
EN
SDA
SCL
PV
IN
SV
IN
I2C
P
GOOD
1F
22
F
47
F
0.35 H
1.1 INTRODUCTION
This chapter provides an overview of the MIC23356 Evaluation Board and covers the
following topics:
• MIC23356 Short Overview
• What is the MIC23356 Evaluation Board?
• Contents of the MIC23356 Evaluation Board Kit
1.2 MIC23356 SHORT OVERVIEW
The MIC23356 device is a compact I2C programmable, high-efficiency, 3A continuous
current, synchronous step-down regulator. The Constant-ON-Time (COT) control
architecture with HyperLight Load™ (HLL) provides very high efficiency at light loads,
while still having ultra-fast transient response. The user can program, via the I
interface, various parameters, such as: output 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 MIC23356 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 MIC23356 is
reduced to 1.5 µA (typical).
MIC23356
EVALUATION BOARD
USER’S GUIDE
2
C
The MIC23356 is available in a thermally-efficient, 16-Lead 2.5 x 2.5 x 0.55 mm thin
MLF package, with an operating junction temperature range from -40°C to +125°C.
More detailed information regarding the capabilities of the MIC23356 are available in
the data sheet.
FIGURE 1-1: Typical MIC23356 Step-Down Application.
2018 Microchip Technology Inc. DS50002834A-page 8
Product Overview
1.3 WHAT IS THE MIC23356 EVALUATION BOARD?
The MIC23356 Evaluation Board is used to evaluate and demonstrate Microchip
Technology’s MIC23356 product. This board demonstrates the MIC23356 in a buck
converter application supplied from an external voltage source (2.4V-5.5V), with I
programmed regulated output. The I
status reporting with the MIC23356 device.
1.4 CONTENTS OF THE MIC23356 EVALUATION BOARD KIT
The MIC23356 Evaluation Board kit includes:
• MIC23356 Evaluation Board (ADM00881)
• Important Information Sheet.
2
C Monitor GUI allows comprehensive control and
2
C
2018 Microchip Technology Inc. DS50002834A-page 9
Chapter 2. Installation and Operation
MCP2221
MIC23356
USB
I/F
VUSB
Data
PWR
V
IN
*
* Three way jumper fitted for selection of I
2
C pull-up voltage.
** I
2
C bus (SDA, SCL), EN control and PG status via MCP2221 USB bridge.
V
OUT
PWR
SCL
SDA
V
IN
PG
EN
**
SCL
SDA
PG
EN
2.1 INTRODUCTION
The MIC23356 Evaluation Board has been developed to test the MIC23356 device’s
capabilities, including loading up to 3A and controlling and monitoring through the USB
interface (via I
external I
MIC23356
EVALUATION BOARD
USER’S GUIDE
2
C Monitor GUI). Pin headers are also fitted for Bode Analysis and
2
C communication.
FIGURE 2-1: MIC23356 Step-Down Regulator with MCP2221 I
2
C Bridge.
2018 Microchip Technology Inc. DS50002834A-page 10
2.2 FEATURES
The MIC23356 Evaluation Board has the following features:
• Input Voltage Range 2.4V to 5.5V
• 3A Continuous Output Current
• Multiple Faults Indication through I
•I
• High Efficiency (up to 95%)
• ±1.5% Output Voltage Accuracy Overline/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
•I
• Latch-Off Thermal Shutdown Protection
• Latch-Off Current Limit Protection
• Power Good Open-Drain Output
2
2
C Programmable:
C
- Output voltage: 0.6V-1.28V, 5 mV resolution
- Slew rate: 0.2 ms/V-3.2 ms/V
- Switching ON time (frequency)
- High-Side current limit: 3.5A - 5A
- Enable delay: 0.25 ms-3 ms
- Output discharge when disabled
2
C Control up to 3.4 MHz
Installation and Operation
2.3 GETTING STARTED
The MIC23356 Evaluation Board is fully assembled and tested to evaluate and
demonstrate the MIC23356 product. This board requires the use of external lab
supplies and a PC. The MIC23356 is offered in four different product options, depending on the default settings at power-up, prior to any I
among the various product options are described in the MIC23356 data sheet. The
Evaluation Board carries the -YFT option, whose default output voltage is 0.6V. All the
device options may be fitted on the board, as is.
2.3.1 Power Input and Output Connection
2.3.1.1 POWERING THE MIC23356 EVALUATION BOARD
When the board is ready for evaluation, apply positive input voltage to the V
and the corresponding return to the GND-IN terminal. The maximum input 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 is recommended. Connect the positive voltage
terminal of the load to the V
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.
2
C write operation. The differences
terminal on the evaluation board and connect the
OUT
terminal
IN
2018 Microchip Technology Inc. DS50002834A-page 11
Installation and Operation
Oscilloscope
CH1
CH2
Voltmete r
Load
Ammeter (10A)
Power
Supply
-
+
I2C Monitor
(PC)
Note: The inductance associated with long wires on the board input may cause
voltage spikes at load stepping or start-up into heavy load. If the spikes
exceed the 5.5V maximum input voltage rating, the MIC23356 may fail.
This can be prevented by populating a 470
footprint.
2.3.1.2 BOARD POWER-UP PROCEDURE
For the power-up procedure, follow the steps below:
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 at the board input (V
begins to switch.
4. The Voltmeter should now indicate an output voltage according to the preset
register values. Adjusting the input voltage and load should not cause the output
to vary more than a few mV 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 3A.
6. Adjust the regulator output and monitor the STATUS registers, as described in
Chapter 4. “GUI Description”.
7. Optionally, for more advanced readings, place Oscilloscope probe 1 in “SW” test
point to monitor the switching waveforms and probe 2 on the output header
(close to the output capacitors) to measure the AC ripple of the output voltage.
µF Electrolytic Capacitor on C8
), the device
IN
FIGURE 2-2: MIC23356 Evaluation Board Test Setup.
2018 Microchip Technology Inc. DS50002834A-page 12
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