MIC23356
Evaluation Board
User’s Guide
2018 Microchip Technology Inc. DS50002834A
Note the following details of the code protection feature on Microchip devices:
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®
MCUs and dsPIC® DSCs, KEELOQ
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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
Installation and Operation
SW
5V/div
PG
5V/div
V
OUT
50 mV/div
AC coupled
EN
5V/div
0
10
20
30
40
50
60
70
80
90
100
0.001 0.01 0.1 1 10
Efficiency (%)
I
OUT
(A)
V
OUT
= 1V
VIN= 3.3V
VIN= 5.0V
VIN= 2.5V
2.3.1.3 PERFORMANCE EVALUATION
The Oscilloscope screen capture in Figure 2-3 displays the MIC23356 switching
waveforms during normal operation, when supplied from 5V input at full load (3A).
FIGURE 2-3: Normal Operation at 0.6V Output, 3A Load.
FIGURE 2-4: Efficiency vs. I
OUT
at 1V.
2018 Microchip Technology Inc. DS50002834A-page 13
Installation and Operation
0
10
20
30
40
50
60
70
80
90
100
0.001 0.01 0.1 1 10
Efficiency (%)
I
OUT
(A)
V
OUT
= 0.6V
VIN= 3.3V
VIN= 5.0V
VIN= 2.5V
FIGURE 2-5: Efficiency vs. I
2.3.1.4 LOOP GAIN MEASUREMENT
The MIC23356 Evaluation Board provides injection points and a termination resistor
(R12) for AC loop gain measurements. If needed, the value of R12 can be changed to
optimize the injection signal level. Inject the oscillator at J9 through the insulation transformer (i.e., across resistor R12).
2.3.1.5 I
2
C PULL-UP VOLTAGE SELECTION
The MIC23356 Evaluation Board is equipped with a jumper for selecting the I
supply voltage. The J8 header can be used to select the I
V
or VIN. If a different pull-up voltage is desired, it can be injected into the PWR pin
USB
of J2. In this case, make sure that no jumper is installed on header J8, to prevent shorting of the externally injected pull-up voltage to either V
2.3.1.6 USING THE MIC23356 EVALUATION BOARD WITH THE EXTERNAL I
MASTER
In order to use the MIC23356 with an external I
microprocessor or another I
accomplish this, the pull-down resistor R10 must be populated to avoid any interference between the MCP2221 and the external I
can be connected to J2. If the external I
the SDA and SCL lines, then the I
MIC23356 Evaluation Board, are not needed and must be removed to prevent pull-up
voltage conflicts.
OUT
at 0.6V.
2
2
C pull-up voltage to either
or VIN.
USB
2
2
C master), the on-board MCP2221 must be disabled. To
2
C master already provides pull-up resistors for
2
C pull-up resistors R6 and R9, present on the
C master (like a microcontroller,
2
C master. Then, the desired I2C master
C pull-up
2
C
2018 Microchip Technology Inc. DS50002834A-page 14
Installation and Operation
2.3.1.7 STARTING THE MIC23356 WITH A CUSTOM OUTPUT VOLTAGE
To power-up the MIC23356 with a custom output voltage, the MIC23356 Evaluation
Board must be first powered-up with the MIC23356 disabled (either by placing the EN
jumper on the J6 header, SDN position, or applying a Logic ‘0’ voltage on the EN test
point). Program it via I
ing the EN jumper on J6, EN position (or by applying a Logic ‘1’ voltage on the EN test
point). The MIC23356 does not retain the set voltage and returns to the default configuration after a power cycle.
2.3.1.8 MIC23356 EVALUATION BOARD ENABLE OPTIONS
In order to enable the MIC23356 on the Evaluation Board, three options are provided:
1. The EN jumper placed on the J6 header – by placing a jumper on the EN position
as described by the silkscreen and by having EN_INT of register CTRL1
(address 0x00) set to ‘1’, the MIC23356 is enabled. By placing a jumper on the
SDN position, the MIC23356 is disabled. The MIC23356 Evaluation Board features a pull-down resistor R3 connected to the EN pin, so, by default, without any
jumper connected, the regulator will be disabled.
2. Software controlled – by clearing EN_INT (bit 1) of register CTRL1 (address
0x00), the MIC23356 status is controlled by EN_CON (bit 0) of the CTRL1 register and the EN pin status is ignored. By setting the EN_CON bit, the MIC23356
is enabled and by clearing the EN_CON bit, the MIC23356 is disabled.
3. MCP2221 GPIO control – by checking “Enable GP0 Control” in the I2CMonitor
GUI, the EN pin is controlled by the GP0 output of the MCP2221 and by using
the “GP0 active” button, the MIC23356 is enabled or disabled.
2
C interface to the desired output voltage and then start it by plac-
Note: When using MCP2221 GPIO control, remove any low-impedance connec-
tion between the EN pin and V
or GND (e.g., a jumper on the J6 header),
IN
as this may cause undefined behavior.
2.3.1.9 PCB LAYOUT CONSIDERATIONS
For the best performance with the minimum occupied board space, some proper layout
techniques should be applied. First, the input and output capacitors should be placed
as close to the MIC23356 as possible and on the same layer as the IC. This will ensure
low ripple and lower switching noise. Then, vias must be used under the MIC23356,
from its exposed pad to the GND plane, in order to improve heat dissipation. Lastly, the
switching node (from the SW pin of the MIC23356 to the inductor) should be as small
as possible to decrease EMI emission.
2.3.1.10 BENCH TESTING AT HIGH CURRENTS
When testing the MIC23356 device at high-load currents or when checking the overcurrent protection behavior, it may be necessary to remove the series ammeter shown
in Figure 2-2 or to replace it with a very low-value shunt resistor. This is because the
internal resistance of many Digital Multimeters (DMMs) used for current measurements
is generally too high.
2.3.1.11 THERMAL CONSIDERATIONS
The MIC23356 Junction-to-Ambient Thermal Resistance JA, as measured on the
Evaluation Board, is approximately +45°C/W. Depending on the loading conditions,
ambient temperature, and device settings, the junction temperature might exceed the
rated operating limit of +125°C due to internal power dissipation. Continuous operation
above the maximum operating limits stated in the data sheet should be avoided.
2018 Microchip Technology Inc. DS50002834A-page 15
Chapter 3. GUI Installation and Operation
3.1 GETTING STARTED
In order to install, use and evaluate the product, several software and hardware tools
are required.
3.1.1 Required Software
•I2C Monitor Graphical User Interface (minimum v.3.1.2)
•Microsoft
• Adobe Acrobat Reader
3.1.2 Required Hardware
• MIC23356 Evaluation Board
• USB-to-micro-USB Cable
®
MIC23356
EVALUATION BOARD
USER’S GUIDE
.NET Framework 4.5 or higher
3.2 GRAPHICAL USER INTERFACE INSTALLATION
The following steps describe how to install the I2C Monitor Graphical User Interface:
1. If Microsoft
Microsoft
instructions.
2. If Adobe Acrobat Reader is already installed, go to Step 3. If not, download
Adobe Acrobat Reader from http://get.adobe.com/reader/ and follow the
installation instructions.
3. Download the I
from www.microchip.com/MIC23356, under “Documentation&Software”.
4. Unzip the I
setup.exe file.
Note: If an older version or a corrupted version of the current I
5. Double click the setup.exe file to open the InstallShield Wizard window and
wait for the extraction to complete. If required, the installation can be stopped by
pressing the Cancel button.
®
.NET Framework is already installed, go to Step 3. If not, download
®
.NET Framework from www.microsoft.com and follow the installation
2
C Monitor Graphical User Interface (minimum v.3.1.2) archive
2
C Monitor Graphical User Interface archive, which contains the
Graphical User Interface is already installed on the computer, see
Section 3.3 “I
proceeding with the installation.
2
C Monitor Graphical User Interface Uninstall” before
2
C Monitor
2018 Microchip Technology Inc. DS50002834A-page 16
GUI Installation and Operation
6. In the Welcome to the InstallShield Wizard for I2CMonitor window, click the Next
button to start the installation.
FIGURE 3-1: Starting the I
7. The installation path can be changed, although it is recommended to keep the
default path. Click Next to continue.
2
C Monitor Graphical User Interface Installation.
FIGURE 3-2: Selecting the Destination Folder.
2018 Microchip Technology Inc. DS50002834A-page 17
GUI Installation and Operation
8. In the Ready to Install the Program window, click the Install button and wait for
the application to proceed with the installation. The progress can be observed in
the “Status” bar.
.
FIGURE 3-3: Installing the I2C Monitor Graphical User Interface.
2018 Microchip Technology Inc. DS50002834A-page 18
GUI Installation and Operation
9. Once the installation is complete, leave the “Launch the program” box checked
to automatically start the I
2
C Monitor GUI, or deselect this check box to start the
GUI at a later stage. Click Finish to end the installation.
To start the GUI at a later stage, either click the desktop icon or browse to
Windows Start>All Programs>Microchip>I2C Monitor
.
FIGURE 3-4: The Installation Complete Window.
3.3 I2C MONITOR GRAPHICAL USER INTERFACE UNINSTALL
In order to install a new version of the I2C Monitor Graphical User Interface, any
previous version or corrupted version should be removed from the computer.
To uninstall, go to Windows Start>Control Panel>Uninstall a program>I2CMonitor
2
I
C Monitor GUI will automatically close once the uninstallation process is complete.
2
FIGURE 3-5: Uninstalling the I
C Monitor Graphical User Interface.
. The
2018 Microchip Technology Inc. DS50002834A-page 19
4.1 INTRODUCTION
Status Bar
Progress Bar
MIC23356
Control by MCP2221 GP0 output
I2C Monitor Status
and
Control Bar
I2C Generic
Register View
MIC23356 I
2
C
Programmable
Features
MIC23356 I2C
Diagnostic
Device Menu
This chapter describes how to use the I2C Monitor Graphical User Interface, using the
MIC23356 Evaluation Board included in the kit.
This chapter provides information regarding the use of the GUI only in the case of the
MIC23356 device. For other devices using the I2C Monitor Graphical User Interface, see
their specific Data Sheets and User’s Guides.
MIC23356
EVALUATION BOARD
USER’S GUIDE
Chapter 4. GUI Description
NOTICE
FIGURE 4-1: I
2
C Monitor Graphical User Interface Main Window - MIC23356 View.
2018 Microchip Technology Inc. DS50002834A-page 20
4.2 THE GRAPHICAL USER INTERFACE
The following sections describe the items in the Graphical User Interface.
4.2.1 Device Menu
The Device drop-down menu allows the user to select the device to be evaluated. If an
evaluation (or added custom) board is used, the profile will automatically change to the
preselected profile.
4.2.2 File Menu
The File menu allows the user to save (Save registers to file) the registers of the
currently selected device to a file that can then be loaded into the GUI by using the
Load registers from file button. The saved file can also be edited (open it with a text
editor).
GUI Description
FIGURE 4-2: File Menu.
4.2.3 Settings Menu
From the Settings menu, add a new custom board to be automatically detected and
switch to its profile. To do this, go to Settings>Device
window, add the desired “Board” descriptor and select the desired “Device” profile.
descriptors and in the Descriptors
FIGURE 4-3: Custom Board Menu.
4.2.4 I2C Monitor Status and Control Bar
The “Status and Control” bar contains the items in Table 4-1.
FIGURE 4-4: I
2018 Microchip Technology Inc. DS50002834A-page 21
2
C Monitor Status and Control Bar.
GUI Description
TABLE 4-1: MONITOR STATUS AND CONTROL BAR
Item Description
Addr This drop-down menu shows the address of the available devices.
Connector
ScanAddr This button is used to scan for a valid address.
Connect/Disconnect
Voltage This drop-down menu is used to select the voltage level of the communication when
Rate This drop-down menu is used to select the corresponding communication rate for the
Pull Ups
Note 1: Optional. PICkit Serial Analyzer should first be connected on the I2C pin header, on the MIC23356 Evalu-
ation Board.
In the “Status and Control” bar the user can choose the hardware tool for the
communication with the device and the settings it should allow.
In order to connect to a device, the user must follow the steps described in
Section 2.3 “Getting Started”. After connecting the Micro-USB cable, the user must
scan for a valid address. Once a valid address is detected, clicking the Connect button
will initialize the connection with the device and the registers will be available for read
and write operations.
This drop-down menu shows the type of connector used to connect the board.
These buttons are used to connect/disconnect the current selected device.
using PICkit™ Serial Analyzer.
device.
This drop-down menu is used to activate the internal pull-ups from the PICkit Serial
Analyzer.
4.2.5 I2C Generic Register View
The I2C Generic Register View area contains the items in Tab le 4- 2. This section of the
2
I
C Monitor GUI is common for any device evaluated.
FIGURE 4-5: Generic Register View Area.
TABLE 4-2: I2C GENERIC REGISTER VIEW ITEMS
Panel Item Description
Operation Register This section shows the registers available for read/write operations.
Read/Write These buttons are used for single register read/write operations.
ReadAll/WriteAll These buttons are used for reading/writing all the available registers.
Number of Registers In this section, the user can set the number of available registers for
read/write operations.
Update This button sets the number of available registers for read/write
operations in the register area.
Register area This section shows the current status of the registers address and
their content.
The specific registers for MIC23356 are described in Appendix C. “MIC23356
Internal Registers”.
2018 Microchip Technology Inc. DS50002834A-page 22
GUI Description
4.2.6 MIC23356 I2C Programmable Features
The MIC23356 I2C “Programmable Features” area contains the items in Table 4-3.
2
FIGURE 4-6: MIC23356 I
C Programmable Features Area – Low Range.
FIGURE 4-7: MIC23356 I
2
C Programmable Features Area – High Range.
2018 Microchip Technology Inc. DS50002834A-page 23
GUI Description
TABLE 4-3: MIC23356 I
Panel/Button Items Description
Parameters EN Pin/Bit Enable
Control
Enable Bit This check box sets the MIC23356 enable bit register. Check the box for
Enable Delay This spin box allows setting the available start time delays.
Current Limit This spin box allows setting the available high-side current limits in order
ON Time This spin box allows setting the available ON-time values, that determine
Slew Rate This spin box allows setting the available output slew rates.
Activate output
pull-down when
disabled
Latch off after 4
OverTemp Cycles
Force PWM This check box sets forced PWM mode, regardless of output loading.
Disable 100% Duty
Cycle
Read/Write These buttons are used to read/write the registers that contain the
Output Voltage Voltage This spin box allows setting the available output voltages. If the evalu-
Read/Write These buttons are used to read/write the registers that contain the infor-
GP0 control Enable GP0 Control This check box allows enable control from the MCP2221 GP0 pin. If
GP0 active This check box sets the state of the MCP2221 GP0 pin. Leave
2
C Programmable Features
This check box allows switching between the I2C controlled device
enable (checked) and pin controlled enable (unchecked). Leave this box
unchecked to enable by jumper or MCP2221 GP0.
regulator enabling, uncheck for disabling. This bit value is considered
only if EN Pin/Bit Enable Control is checked.
to obtain the nominal load currents.
slower (high TON) or faster (lower TON) switching frequencies.
This check box activates automatic output pull-down resistor when the
MIC23356 is disabled.
This check box sets the latch off after four overtemperature (thermal
shutdown) cycles.
This check box disables 100% duty cycle operation on high side when
V
is close to V
IN
(option MIC23356-SAYFT).
information described above.
ated chip option is MIC23356-YFT, MIC23356-HAYFT or
MIC23356-FAYFT, the Low Range option must be selected. If the evaluated chip is MIC23356-SAYFT, High Range must be selected.
mation described above.
unchecked, pin GP0 is Tri-State.
To enable access to this feature and allow pin enable control, uncheck
EN Pin/Bit Enable Control.
The enable jumper must first be removed, to prevent short-circuiting GP0
with the jumper.
unchecked to disable the MIC23356 through Enable pin, or check the
box to enable the MIC23356 regulator.
OUT
. This feature is available only in High Range mode
This area of the GUI allows the user to modify the device features. For additional
information on the part, refer to the data sheet.
2018 Microchip Technology Inc. DS50002834A-page 24
4.2.7 MIC23356 I2C Diagnostic
The MIC23356 Diagnostic area contains the items in Tab l e 4- 4 .
GUI Description
FIGURE 4-8: MIC23356 I
TABLE 4-4: MIC23356 I
Panel Items Description
Status Power Good This box is checked if the output voltage reaches 91% of its set
Latched Off This box is checked if the regulator output is latched off, due to
OverTemp
Shutdown
Current Limit This box is checked if the high-side sensed current reaches the
Soft Start Done This box is checked after successful regulator soft start ramp.
Boot Up Error This box is checked if an error occurs while loading the trim and
Buck Enabled This box indicates the internal state of the regulator, determined
OverTemp
Warning
2
C Diagnostic Area.
2
C DIAGNOSTIC AREA ITEMS
value.
four consecutive hiccup events or thermal shutdown.
This box is checked if the MIC23356 enters Thermal Shutdown
(Typ. T
value set in the “Current Limit” spin box.
configuration data into the digital core. At successful start-up, this
box remains unchecked (clear).
by enable commands (via EN pin or I
This box is checked if the MIC23356 junction temperature
exceeds +118°C. This does not affect the normal operation of the
device.
= +165°C)
J
2
C)
2018 Microchip Technology Inc. DS50002834A-page 25
GUI Description
The MIC23356 I2C Diagnostic area resumes the information contained in the STATUS
register. The STATUS register contains latched (Flag) or non-latched (Status) bits. Flag
bits are set when the corresponding Fault condition occurs and do not return to zero
once the Fault condition ceases. If such a fault occurs, the user can clear the faults by
toggling the enable function or power cycling the device. Status bits are set when the
corresponding Fault condition has occurred, and return to zero automatically once the
Fault condition has ceased. This information is refreshed once every two seconds.
Because of this refresh traffic, when using a logic analyzer it is more difficult to
synchronize the exact moment of a certain command. In order to simplify this, an
auxiliary trigger signal is provided on pin GP2 of the MCP2221. This signal is triggered
for each user Read/Write command.
TABLE 4-5: STATUS BAR ITEMS
Item Description
Status Label The status label shows if there is any device connected to the board. Refer to
Ta bl e 4- 6 for a list of possible labels.
Progress Bar This bar shows the level of completion for a given command.
TABLE 4-6: STATUS LABELS
Status Label Description
STATUS: Connected! This message is shown when the GUI connects to a device.
STATUS: Disconnected! This message is shown when the GUI does not detect a connected
device.
2018 Microchip Technology Inc. DS50002834A-page 26
Appendix A. Schematic and Layouts
A.1 INTRODUCTION
This appendix contains the following schematic and layouts for the MIC23356
Evaluation Board:
• Board – Schematic
• Board – Top Silk
• Board – Top Copper and Silk
• Board – Top Copper
• Board – Middle Layer 1
• Board – Middle layer 2
• Board – Bottom Copper
• Board – Bottom Copper and Silk
• Board – Bottom Silk
MIC23356
EVALUATION BOARD
USER’S GUIDE
2018 Microchip Technology Inc. DS50002834A-page 27
DS50002834A-page 28 2018 Microchip Technology Inc.
J15 J19
TP LOOP Black
J20
TP LOOP Red
J21
TP LOOP Red
J14
J18
2k 0603
R6
100k
0603
R7
1uF
16V
0603
C1
SDA
EN
49.9R
0603
R1
0.1uF
16V
0603
C6
J3
0.1uF
16V
0402
C3
J17
470uF
16V
C8
HDR-2.54 Male 1x3
J6
J1
J4
J5
47uF
10V
1210
C5
J13 J12
SW
2k 0603
R9
1M
0603
R3
PG
SCL
Net Tie
0.5mm
NT1
DD+
0R
R8
0R
R11
SCL
SDA
EN
PG
HDR-2.54 Male 1x3
J8
PWR
0R
R5
0R
R4
VDD
2
3
RST
5
6
7
8
9
10
VUSB
D-
D+
VSS
VDD
VUS
VSS
MCP2221A
U2
DD+
ID
VBUS
GND
DD+
USB2.0 Micro-B Female
J7
SCL
SDA
1234
J2
PWR
350nH
L1
4.7uF
10V
0805
C2
4.7uF
10V
0805
C11
10R
0603
1%
R12
DNP
J9
22uF
10V
0805
C9
Shunt 2.54mm 1x2 Handle
JP1
Shunt 2.54mm 1x2 Handle
JP2
0R
DNP
R10
JP2 should be mounted on 1-2 pins J8
JP1 should be mounted on 1-2 pins J6
1
2
3
PVIN
PVIN
SVIN
SCL
SDA
EN
10
11
12
13
14
15
16
PV
PV
SV
SC
SDA
EN
MIC23356
U1
9,1
9,1
9,1
9,1
9,1
A.2 BOARD – SCHEMATIC
MIC23356 Evaluation Board User’s Guide
B
+
RST
IN
IN
IN
L
A.3 BOARD – TOP SILK
Schematic and Layouts
A.4 BOARD – TOP COPPER AND SILK
2018 Microchip Technology Inc. DS50002834A-page 29
A.5 BOARD – TOP COPPER
Schematic and Layouts
A.6 BOARD – MIDDLE LAYER 1
2018 Microchip Technology Inc. DS50002834A-page 30
A.7 BOARD – MIDDLE LAYER 2
Schematic and Layouts
A.8 BOARD – BOTTOM COPPER
2018 Microchip Technology Inc. DS50002834A-page 31
A.9 BOARD – BOTTOM COPPER AND SILK
Schematic and Layouts
A.10 BOARD – BOTTOM SILK
2018 Microchip Technology Inc. DS50002834A-page 32
MIC23356
EVALUATION BOARD
USER’S GUIDE
Appendix B. Bill of Materials (BOM)
TABLE B-1: MIC23356 EVALUATION BOARD – BILL OF MATERIALS (BOM)
Qty. Reference Description Manufacturer Part Number
1 C1 Ceramic capacitor, 1 F, 16V, 10%,
X7R, SMD, 0603
2 C2, C11 Ceramic capacitor, 4.7 F, 10V, 10%,
X7R, SMD, 0805
1 C3 Ceramic capacitor, 0.1 F, 16V, 10%,
X7R, SMD, 0402
1 C5 Ceramic capacitor, 47 F, 10V, 20%,
X7R, SMD, 1210
1 C6 Ceramic capacitor, 0.1 F, 16V, 10%,
X7R, SMD, 0603
1 C8 Aluminum capacitor, 470 F, 16V,
20%, RAD, P3.5D8H11.5
1 C9 Ceramic capacitor, 22 F, 10V, 20%,
X7S, SMD, 0805
4 J1, J3, J12, J13 Connector, HDR-2.54, Male, 1x2,
Gold, 5.84MH, TH, Vertical
2 J14, J21 Misc, Test Point, Multi Purpose, Mini,
Red
3 J17, J18, J20 Misc, Test Point, Multi Purpose, Mini,
Black
1 J2 Connector, HDR-2.54, Male, 1x4, Tin,
5.84MH, TH, Vertical
4 J4, J5, J15, J19 Connector, TP, PIN, Tin, TH Harwin Plc. H2121-01
2 J6, J8 Connector, HDR-2.54 Male, 1x3, Tin,
5.84MH, TH, Vertical
1 J7 Connector, USB 2.0, Micro-B, Female
SMD R/A
0J9 NOT POPULATED FCI 77311-118-02LF
1 L1 Inductor, 350 nH, 3.3A, 20%, SMD,
L3.2W3.5H1.5
1 PCB1 MIC23356 Evaluation Board – Printed
Circuit Board
1 R1 Resistor, TKF, 49.9R 1%, 1/10W,
SMD, 0603
0R10 NOT POPULATED Panasonic - ECG ERJ-3GSY0R00V
1 R12 Resistor, TKF, 10R 1%, 1/10W, SMD,
0603
1 R3 Resistor, TKF, 1M, 1%, 1/10W, 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.
Yageo Corporation CC0603KRX7R7BB105
TDK Corporation C2012X7R1A475K125AC
Murata Electronics
North America, Inc.
Taiyo Yuden Co., Ltd. LMK325B7476MM-TR
AVX Corporation 0603YC104KAT2A
Nichicon Corporation UVZ1C471MPD
TDK Corporation C2012X7S1A226M125AC
FCI 77311-118-02LF
Keystone
Electronics Corp.
Keystone
Electronics Corp.
FCI 68002-404HLF
Samtec, Inc. TSW-103-07-T-S
FCI 10118193-0001LF
Coilcraft XEL3515-351
Microchip
Technology Inc.
Panasonic
Panasonic - ECG ERJ-3EKF10R0V
Panasonic - ECG ERJ-3EKF1004V
®
- ECG ERJ-3EKF49R9V
GRM155R71C104KA88D
5000
5001
04-10741-R1
2018 Microchip Technology Inc. DS50002834A-page 33
Bill of Materials (BOM)
TABLE B-1: MIC23356 EVALUATION BOARD – BILL OF MATERIALS (BOM) (CONTINUED)
Qty. Reference Description Manufacturer Part Number
4 R4, R5, R8, R11 Resistor, TKF, 0R 1/10W, SMD, 0603 Panasonic - ECG ERJ-3GSY0R00V
2 R6, R9 Resistor, TKF, 2 k 1%, 1/10W, SMD,
0603
1R7 Resistor, TKF 100k 1% 1/10W SMD
0603
1 U1 Microchip Analog Switcher Buck 2.4V
to 5.5V MIC23356YFT FTQFN-16
1 U2 Microchip Interface USB I
MCP2221A-I/ST TSSOP-14
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.
2
C UART
TABLE B-2: BILL OF MATERIALS – MECHANICAL PARTS
Qty. Reference Description Manufacturer Part Number
2 JP1, JP2 Mechanical HW Jumper, 2.54 mm, 1x2,
Phosphor Bronze w/ Handle
1 LABEL1 Label, Assembly w/Rev Level (Small
Modules) Per MTS-0002
4PAD1, PAD2,
PAD3, PAD4
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.
Mechanical HW Rubber Pad, Cylindrical, D7.9 H5.3, Black
Panasonic - ECG ERJ-3EKF2001V
Panasonic - ECG ERJ-3EKF1003V
Microchip
Technology Inc.
Microchip
Technology Inc.
Jameco Valuepro 2012JH-R
——
3M SJ61A11
MIC23356YFT
MCP2221A-I/ST
2018 Microchip Technology Inc. DS50002834A-page 34
EVALUATION BOARD
Appendix C. MIC23356 Internal Registers
C.1 REGISTER MAP AND I2C PROGRAMMABILITY
The MIC23356 internal registers are summarized in Ta b le C - 1.
TABLE C-1: MIC23356 REGISTER MAP
Address Register Name
0x00 Control Register (CTRL1)
TON<1:0> Reserved ILIM EN_DELAY<1:0> EN_INT EN_CON
0x01 Output Control Register (CTRL2)
DIS_100PCT FPWM OT_LATCH PULL_DN SLEW_RATE<3:0>
0x02 Output Voltage Register (VOUT)
VO<7:0>
0x03 STATUS and FAULT Register (FAULT)
OT_WARN EN_STAT BOOT_ERR SSD HICCUP OT LATCH_OFF PG
MIC23356
USER’S GUIDE
REGISTER C-1: CTRL1 – CONTROL REGISTER (ADDRESS 0X00)
R/W-0 R/W-0 R-1 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
TON Reserved ILIM EN_DELAY EN_INT EN_CON
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
RC = Read-then-clear bit
bit 7-6 TON<7:6>: ON Time bits
00 = Low Frequency
01 = Medium Frequency
10 = High Frequency
11 = Very Fast Frequency
bit 5 Reserved bit
bit 4 ILIM: High-Side Peak Current Limit bit
0 = 3.5A
1 = 5A
bit 3-2 EN_DELAY<3:2>: Enable Delay bits
00 = 250 µs
01 = 1 ms
10 = 2 ms
11 = 3 ms
bit 1 EN_INT: Enable Bit Register Control bit
0 = Register Controlled
1 = Enable Controlled
2018 Microchip Technology Inc. DS50002834A-page 35
MIC23356 Internal Registers
REGISTER C-1: CTRL1 – CONTROL REGISTER (ADDRESS 0X00) (CONTINUED)
bit 0 EN_CON: Enable Control bit
0 = Off
1 = On
REGISTER C-2: CTRL2 – OUTPUT CONTROL REGISTER (ADDRESS 0X01)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
DIS_100PCT FPWM OT_LATCH PULLDN SLEW_RATE
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
RC = Read-then-clear bit
bit 7 DIS_100PCT: Disable 100% Duty Cycle bit
0 = 100% DC
1 = Disable 100% DC
bit 6 FPWM: Force PWM bit
0 = HLL
1 = FPWM
bit 5 OT_LATCH: Overtemperature Latch bit
0 = Latch Off Immediately
1 = Latch Off after 4 OT Cycles
bit 4 PULLDN: Enable/Disable Regulator Pull-Down When Power Down bit
0 = No Pull Down
1 = Pull Down
bit 3-0 SLEW_RATE<3:0>: Step Slew-Rate Time in µs/V bits
0000 = 200
0001 = 400
0010 = 600
0011 = 800
0100 = 1000
0101 = 1200
0110 = 1400
0111 = 1600
1000 = 1800
1001 = 2000
1010 = 2200
1011 = 2400
1100 = 2600
1101 = 2800
1110 = 3000
1111 = 3200
2018 Microchip Technology Inc. DS50002834A-page 36
MIC23356 Internal Registers
0x00-0x76 = 0.6V 0x80 = 0.645 0xA0 = 0.805V 0xC0 = 0.965 0xE0 = 1.125V
0x81 = 0.65V 0xA1 = 0.81V 0xC1 = 0.97V 0xE1 = 1.13V
0x82 = 0.655V 0xA2 = 0.815V 0xC2 = 0.975V 0xE2 = 1.135V
0x83 = 0.66V 0xA3 = 0.82V 0xC3 = 0.98V 0xE3 = 1.14V
0x84 = 0.665V 0xA4 = 0.825V 0xC4 = 0.985V 0xE4 = 1.145V
0x85 = 0.67V 0xA5 = 0.83V 0xC5 = 0.99V 0xE5 = 1.15V
0x86 = 0.675V 0xA6 = 0.835V 0xC6 = 0.995V 0xE6 = 1.155V
0x87 = 0.68V 0xA7 = 0.84V 0xC7 = 1V 0xE7 = 1.16V
0x88 = 0.685V 0xA8 = 0.845V 0xC8 = 1.005V 0xE8 = 1.165V
0x89 = 0.69V 0xA9 = 0.85V 0xC9 = 1.01V 0xE9 = 1.17V
0x8A = 0.695V 0xAA = 0.855V 0xCA = 1.015V 0xEA = 1.175V
0x8B = 0.7V 0xAB = 0.86V 0xCB = 1.02V 0xEB = 1.18V
0x8C = 0.705V 0xAC = 0.865V 0xCC = 1.025V 0xEC = 1.185V
0x8D = 0.71V 0xAD = 0.87V 0xCD = 1.03V 0xED = 1.19V
0x8E = 0.715V 0xAE = 0.875V 0xCE = 1.035V 0xEE = 1.195V
0x8F = 0.72V 0xAF = 0.88V 0xCF = 1.04V 0xEF = 1.2V
0x90 = 0.725V 0xB0 = 0.885V 0xD0 = 1.045V 0xF0 = 1.205V
0x91 = 0.73V 0xB1 = 0.89V 0xD1 = 1.05V 0xF1 = 1.21V
0x92 = 0.735V 0xB2 = 0.895V 0xD2 = 1.055V 0xF2 = 1.215V
0x93 = 0.74V 0xB3 = 0.9V 0xD3 = 1.06V 0xF3 = 1.22V
0x94 = 0.745V 0xB4 = 0.905V 0xD4 = 1.065V 0xF4 = 1.225V
0x95 = 0.75V 0xB5 = 0.91V 0xD5 = 1.07V 0xF5 = 1.23V
0x96 = 0.755V 0xB6 = 0.915V 0xD6 = 1.075V 0xF6 = 1.235V
0x77 = 0.6V 0x97 = 0.76V 0xB7 = 0.92V 0xD7 = 1.08V 0xF7 = 1.24V
0x78 = 0.605V 0x98 = 0.765V 0xB8 = 0.925V 0xD8 = 1.085V 0xF8 = 1.245V
0x79 = 0.61V 0x99 = 0.77V 0xB9 = 0.93V 0xD9 = 1.09V 0xF9 = 1.25V
0x7A = 0.615V 0x9A = 0.775V 0xBA = 0.935V 0xDA = 1.095V 0xFA = 1.255V
0x7B = 0.62V 0x9B = 0.78V 0xBB = 0.94V 0xDB = 1.1V 0xFB = 1.26V
0x7C = 0.625V 0x9C = 0.785V 0xBC = 0.945V 0xDC = 1.105V 0xFC = 1.265V
0x7D = 0.63V 0x9D = 0.79V 0xBD = 0.95V 0xDD = 1.11V 0xFD = 1.27V
0x7E = 0.635V 0x9E = 0.795V 0xBE = 0.955V 0xDE = 1.115V 0xFE = 1.275V
0x7F = 0.64V 0x9F = 0.8V 0xBF = 0.96V 0xDF = 1.12V 0xFF = 1.28V
REGISTER C-3: OUTPUT VOLTAGE CONTROL REGISTER (ADDRESS 0X02)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
VO
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
RC = Read-then-clear bit
bit 7-0 VO<7:0>: Output Voltage Control, options YFT, --HAYFT, -FAYFT bits
2018 Microchip Technology Inc. DS50002834A-page 37
MIC23356 Internal Registers
REGISTER C-3: OUTPUT VOLTAGE CONTROL REGISTER (ADDRESS 0X02) (CONTINUED)
bit 7-0 VO<7:0>: Output Voltage Control, option -SAYFT bits
0x00-0x3A =
0.6V
0x3B = 0.6V 0x5B = 0.92V 0x7B = 1.24V 0x98 = 1.84V 0xBB = 2.48V 0xDB = 3.12V 0xFB = 3.76V
0x3C = 0.61V 0x5C = 0.93V 0x7C = 1.25V 0x9C = 1.86V 0xBC = 2.5V 0xDC = 3.14V 0xFC = 3.78V
0x3D = 0.62V 0x5D = 0.94V 0x7D = 1.26V 0x9D = 1.88V 0xBD = 2.52V 0xDD = 3.16V 0xFD = 3.8V
0x3E = 0.63V 0x5E = 0.95V 0x7E = 1.27V 0x9E = 1.9V 0xBE = 2.54V 0xDE = 3.18V 0xFE = 3.82V
0x3F = 0.64V 0x5F = 0.96V 0x7F = 1.28V 0x9F = 1.92V 0xBF = 2.56V 0xDF = 3.2V 0xFF = 3.84V
0x40 = 0.65V 0x60 = 0.97V 0x80 = 1.3V 0xA0 = 1.94V 0xC0 = 2.58V 0xE0 = 3.22V
0x41 = 0.66V 0x61 = 0.98V 0x81=1.32V 0xA1 = 1.96V 0xC1 = 2.6V 0xE1 = 3.24V
0x42 = 0.67V 0x62 = 0.99V 0x82 = 1.34V 0xA2 = 1.98V 0xC2 = 2.62V 0xE2 = 3.26V
0x43 = 0.68V 0x63 = 1V 0x83 = 1.36V 0xA3 = 2V 0xC3 = 2.64V 0xE3 = 3.28V
0x44 = 0.69V 0x64 = 1.01V 0x84 = 1.38V 0xA4 = 2.02V 0xC4 = 2.66V 0xE4 = 3.3V
0x45 = 0.7V 0x65 = 1.02V 0x85 = 1.4V 0xA5 = 2.04V 0xC5 = 2.68V 0xE5 = 3.32V
0x46 = 0.71V 0x66 = 1.03V 0x86 = 1.42V 0xA6 = 2.06V 0xC6 = 2.7V 0xE6 = 3.34V
0x47 = 0.72V 0x67 = 1.04V 0x87 = 1.44V 0xA7 = 2.08V 0xC7 = 2.72V 0xE7 = 3.36V
0x48 = 0.73V 0x68 = 1.05V 0x88 = 1.46V 0xA8 = 2.1V 0xC8 = 2.74V 0xE8 = 3.38V
0x49 = 0.74V 0x69 = 1.06V 0x89 = 1.48V 0xA9 = 2.12V 0xC9 = 2.76V 0xE9 = 3.4V
0x4A = 0.75V 0x6A = 1.07V 0x8A = 1.5V 0xAA = 2.14V 0xCA = 2.78V 0xEA = 3.42V
0x4B = 0.76V 0x6B = 1.08V 0x8B = 1.52V 0xAB = 2.16V 0xCB = 2.8V 0xEB = 3.44V
0x4C = 0.77V 0x6C = 1.09V 0x8C = 1.54V 0xAC = 2.18V 0xCC = 2.82V 0xEC = 3.46V
0x4D = 0.78V 0x6D = 1.1V 0x8D = 1.56V 0xAD = 2.2V 0xCD = 2.84V 0xED = 3.48V
0x4E = 0.79V 0x6E = 1.11V 0x8E = 1.58V 0xAE = 2.22V 0xCE = 2.86V 0xEE = 3.5V
0x4F = 0.8V 0x6F=1.12V 0x8F = 1.6V 0xAF = 2.24V 0xCF = 2.88V 0xEF = 3.52V
0x50 = 0.81V 0x70 = 1.13V 0x90 = 1.62V 0xB0 = 2.26V 0xD0 = 2.9V 0xF0 = 3.54V
0x51 = 0.82V 0x71 = 1.14V 0x91 = 1.64V 0xB1 = 2.28V 0xD1 = 2.92V 0xF1 = 3.56V
0x52 = 0.83V 0x72 = 1.15V 0x92 = 1.66V 0xB2 = 2.3V 0xD2 = 2.94V 0xF2 = 3.58V
0x53 = 0.84V 0x73 = 1.16V 0x93 = 1.68V 0xB3 = 2.32V 0xD3 = 2.96V 0xF3 = 3.6V
0x54 = 0.85V 0x74 = 1.17V 0x94 = 1.7V 0xB4 = 2.34V 0xD4 = 2.98V 0xF4 = 3.62V
0x55 = 0.86V 0x75 = 1.18V 0x95 = 1.72V 0xB5 = 2.36V 0xD5 = 3V 0xF5 = 3.64V
0x56 = 0.87V 0x76=1.19V 0x96 = 1.74V 0xB6 = 2.38V 0xD6 = 3.02V 0xF6 = 3.66V
0x57 = 0.88V 0x77 = 1.2V 0x97 = 1.76V 0xB7 = 2.4V 0xD7 = 3.04V 0xF7 = 3.68V
0x58 = 0.89V 0x78 = 1.21V 0x98 = 1.78V 0xB8 = 2.42V 0xD8 = 3.06V 0xF8 = 3.7V
0x59 = 0.9V 0x79 = 1.22V 0x99 = 1.8V 0xB9 = 2.44V 0xD9 = 3.08V 0xF9 = 3.72V
0x5A = 0.91V 0x7A = 1.23V 0x9A = 1.82V 0xBA = 2.46V 0xDA = 3.1V 0xFA = 3.74V
2018 Microchip Technology Inc. DS50002834A-page 38
MIC23356 Internal Registers
REGISTER C-4: STATUS AND FAULT REGISTER (ADDRESS 0X03)
R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0
OT_WARN EN_STAT BOOT_ERR SSD HICCUP OT LATCH_OFF PG
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
RC = Read-then-clear bit
bit 7 OT_WARN: Overtemperature Warning bit
0 = No Fault
1 = Fault
bit 6 EN_STAT: Buck ON/OFF Control bit
0 = OFF
1 = ON
bit 5 BOOT_ERR: Boot-Up Error bit
0 = No Fault
1 = Fault
bit 4 SSD: Soft Start Done bit
0 = Ramp not Done
1 = Ramp Done
bit 3 HICCUP: Current Limit Hiccup bit
0 = Not in Hiccup
1 = In Hiccup
bit 2 OT: Overtemperature bit
0 = No Fault
1 = Fault
bit 1 LATCH_OFF: Overcurrent or Overtemperature Output Latch Off bit
0 = No Fault
1 = Fault
bit 0 PG: Power Good bit
0 = Power Not Good
1 = Power Good
2018 Microchip Technology Inc. DS50002834A-page 39
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2018 Microchip Technology Inc. DS50002834A-page 40
08/15/18
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