MIC2125/6
Demonstration Board
User’s Guide
2015 Microchip Technology Inc.
DS20005469A
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and may be superseded by updates.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
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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.
Trademarks
The Microchip name and logo, the Microchip logo, dsPIC,
FlashFlex, flexPWR, JukeBlox, KEELOQ, KEELOQ logo, Kleer,
LANCheck, MediaLB, MOST, MOST logo, MPLAB,
OptoLyzer, PIC, PICSTART, PIC32 logo, RightTouch, SpyNIC,
SST, SST Logo, SuperFlash and UNI/O are registered
trademarks of Microchip Technology Incorporated in the
U.S.A. and other countries.
The Embedded Control Solutions Company and mTouch are
registered trademarks of Microchip Technology Incorporated
in the U.S.A.
Analog-for-the-Digital Age, BodyCom, chipKIT, chipKIT logo,
CodeGuard, dsPICDEM, dsPICDEM.net, ECAN, In-Circuit
Serial Programming, ICSP, Inter-Chip Connectivity, KleerNet,
KleerNet logo, MiWi, motorBench, MPASM, MPF, MPLAB
Certified logo, MPLIB, MPLINK, MultiTRAK, NetDetach,
Omniscient Code Generation, PICDEM, PICDEM.net, PICkit,
PICtail, RightTouch logo, REAL ICE, SQI, Serial Quad I/O,
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.
© 2015, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
ISBN: 978-1-5224-0069-1
QUALITYMANAGEMENTSYSTEM
CERTIFIEDBYDNV
== ISO/TS16949==
DS20005469A-page 2
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.
2015 Microchip Technology Inc.
Object of Declaration: MIC2125/6 Demonstration Board
2015 Microchip Technology Inc.
DS20005469A-page 3
NOTES:
DS20005469A-page 4
2015 Microchip Technology Inc.
MIC2125/6 DEMONSTRATION BOARD
USER’S GUIDE
Table of Contents
Preface ........................................................................................................................... 7
Chapter 1. Product Overview
1.1 Introduction ................................................................................................... 11
1.2 MIC2125/6 Short Overview .......................................................................... 11
1.2.1 MIC2125/6 Key Features .......................................................................... 11
1.2.2 MIC2125/6 Overview ................................................................................. 11
1.3 What is the MIC2125/6 Demo Board? .......................................................... 12
1.3.1 Requirements ............................................................................................. 12
1.3.2 Precautions ................................................................................................ 12
1.3.3 Feedback Resistors.................................................................................... 13
1.3.4 SW Node .................................................................................................... 13
1.3.5 Current Limit ............................................................................................... 13
1.3.6 Loop Gain Measurement ............................................................................ 14
1.3.7 Setting the Switching Frequency ................................................................ 15
1.4 MIC2125/6 Demo Board Kit Contents .......................................................... 16
Chapter 2. Installation and Operation
2.1 Overview ...................................................................................................... 17
2.2 Getting Started ............................................................................................. 17
2.2.1 VIN Supply ................................................................................................. 17
2.2.2 Connect Load and Monitor Output ............................................................. 17
2.2.3 Enable Input ............................................................................................... 17
2.2.4 Turn On the Power ..................................................................................... 17
Appendix A. Schematics and Layouts
A.1 Introduction .................................................................................................. 19
A.2 Board - Schematic (16-Lead QFN Part) ....................................................... 20
A.3 Board - Top Layer ........................................................................................ 21
A.4 Board - Mid Layer 1 (Ground Plane) ............................................................ 21
A.5 Board - Mid Layer 2 ..................................................................................... 22
A.6 Board - Bottom Layer ................................................................................... 22
Appendix B. Bill of Materials (BOM) .................................................................................. 23
Worldwide Sales and Service .................................................................................... 26
2015 Microchip Technology Inc.
DS20005469A-page 5
MIC2125/6 Demonstration Board User’s Guide
NOTES:
DS20005469A-page 6
2015 Microchip Technology Inc.
MIC2125/6 DEMONSTRATION
BOARD
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 web site
(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
MIC2125/6 Demo Board. Items discussed in this chapter include:
•
•
•
•
•
•
Document Layout
Conventions Used in this Guide
Recommended Reading
The Microchip Web Site
Customer Support
Document Revision History
DOCUMENT LAYOUT
This document describes how to use the MIC2125/6 Demo Board as a development
tool to emulate and debug firmware on a target board, as well as how to program
devices. The document is organized as follows:
• Chapter 1. “Product Overview” – Provides important information about the
MIC2125/6 Demo Board and shows the hardware details of its components.
• Chapter 2. “Installation and Operation” – Includes instructions on how to use,
power and test the MIC2125/6 Demo Board.
• Appendix A. “Schematics and Layouts” – Shows the schematic and layout
diagrams for the MIC2125/6 Demo Board.
• Appendix B. “Bill of Materials (BOM)” – Lists the parts used to build the
MIC2125/6 Demo Board.
2015 Microchip Technology Inc.
DS20005469A-page 7
MIC2125/6 Demonstration Board User’s Guide
CONVENTIONS USED IN THIS GUIDE
This manual uses the following documentation conventions:
DOCUMENTATION CONVENTIONS
Description
Arial font:
Italic characters
Represents
Referenced books
Emphasized text
A window
A dialog
A menu selection
A field name in a window or
dialog
A menu path
MPLAB® IDE User’s Guide
...is the only compiler...
the Output window
the Settings dialog
select Enable Programmer
“Save project before build”
A dialog button
A tab
A number in verilog format,
where N is the total number of
digits, R is the radix and n is a
digit.
A key on the keyboard
Click OK
Click the Power tab
4‘b0010, 2‘hF1
Italic Courier New
Sample source code
Filenames
File paths
Keywords
Command-line options
Bit values
Constants
A variable argument
Square brackets [ ]
Optional arguments
Curly brackets and pipe
character: { | }
Ellipses...
Choice of mutually exclusive
arguments; an OR selection
Replaces repeated text
#define START
autoexec.bat
c:\mcc18\h
_asm, _endasm, static
-Opa+, -Opa0, 1
0xFF, ‘A’
file.o, where file can be
any valid filename
mcc18 [options] file
[options]
errorlevel {0|1}
Initial caps
Quotes
Underlined, italic text with
right angle bracket
Bold characters
N‘Rnnnn
Text in angle brackets < >
Courier New font:
Plain Courier New
Represents code supplied by
user
DS20005469A-page 8
Examples
File>Save
Press <Enter>, <F1>
var_name [,
var_name...]
void main (void)
{ ...
}
2015 Microchip Technology Inc.
Preface
RECOMMENDED READING
This user's guide describes how to use the MIC2125/6 Demo Board. Another useful
document is listed below. The following Microchip document is available and
recommended as a supplemental reference resource:
• MIC2125/6 Data Sheet – “28V Synchronous Buck Controllers Featuring
Adaptive ON-Time Control” (DS20005459)
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
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 (December 2015)
• Initial release of this document.
2015 Microchip Technology Inc
.DS20005469A-page 9
MIC2125/6 Demonstration Board User’s Guide
NOTES:
DS20005469A-page 10
2015 Microchip Technology Inc.
MIC2125/6 DEMONSTRATION BOARD
USER’S GUIDE
Chapter 1. Product Overview
1.1
INTRODUCTION
This chapter provides an overview of the MIC2125/6 Demo Board and covers the
following topics:
• MIC2125/6 Short Overview
• What is the MIC2125/6 Demo Board?
• MIC2125/6 Demo Board Kit Contents
1.2
MIC2125/6 SHORT OVERVIEW
1.2.1
MIC2125/6 Key Features
The key features of the MIC2125/6 include:
• Hyper Speed Control® Architecture Enables:
- High delta V operation (VIN = 28V and VOUT = 0.6V)
• Any Capacitor™ stable
• 4.5V to 28V Input Voltage
• Adjustable Output Voltage from 0.6V to 24V
• 200 kHz to 750 kHz Programmable Switching Frequency
• HyperLight Load® (MIC2125)
• Hyper Speed Control (MIC2126)
• Enable Input and Power Good Output
• Built-in 5V Regulator for Single-Supply Operation
• Programmable Current Limit and “Hiccup” Mode Short-Circuit Protection
• 7 ms Internal Soft-Start, Internal Compensation, and Thermal Shutdown
• Supports Safe Start-Up into a Prebiased Output
• –40°C to +125°C Junction Temperature Range
• 16-pin, 3 mm × 3 mm QFN Package
1.2.2
MIC2125/6 Overview
The MIC2125 and MIC2126 are constant-frequency synchronous buck controllers
featuring a unique adaptive ON-time control architecture. The MIC2125/6 operate over
an input voltage range from 4.5V to 28V and can be used to supply load current up to
25A. The output voltage is adjustable down to 0.6V with an accuracy of ±1%. The
device operates with programmable switching frequency from 200 kHz to 750 kHz.
HyperLight Load® architecture operates in pulse-skipping mode at light loads, but
operates in fixed-frequency CCM mode from medium loads to heavy loads. Hyper
Speed Control® architecture operates in fixed-frequency CCM mode under all load
conditions.
2015 Microchip Technology Inc.
DS20005469A-page 11
MIC2125/6 Demonstration Board User’s Guide
The basic parameters of the evaluation board are:
• Input: 5V to 28V
• Output: 0.6V to 5V at 20A
• 350 kHz Switching Frequency (Adjustable from 200 kHz to 750 kHz)
VIN
4.5V TO 28V
FREQ
PVDD
2.2μF
×3
VIN
VDD
220μF
BST
MIC2125/6
4.7μF
AGND
0.1μF
DH
EN
EN
PG
PG
SW
9.09kΩ
DL
VOUT
VOUT
3.3V/20A
0.72μH
10kΩ
4.7nF
100μF 470μF
0.1μF
56.2kΩ
OVP
PGND
10kΩ
FB
2.26kΩ
ILIM
1.2kΩ
FIGURE 1-1:
1.3
Typical Application Circuit.
WHAT IS THE MIC2125/6 DEMO BOARD?
The MIC2125/6 Demo Board has been developed to demonstrate the capabilities of
the MIC2125/6 device with two adaptive ON-time control architectures:
• Hyper Speed Control (MIC2126)
• HyperLight Load (MIC2125)
1.3.1
Requirements
The MIC2125 and MIC2126 evaluation boards require only a single power supply with
at least 10A current capability. The MIC2125/6 each have an internal VDD LDO, so no
external linear regulator is required to power the internal biasing of the IC. In
applications with VIN < +5.5V, VDD should be tied to VIN to by-pass the internal linear
regulator. The output load can either be a passive or an active load.
1.3.2
Precautions
The MIC2125/6 evaluation boards do not have reverse polarity protection. Applying a
negative voltage to the VIN and GND terminals may damage the device. The maximum
VIN of the board is rated at 28V.
CAUTION
Exceeding 28V on the VIN pin can damage the device.
DS20005469A-page 12
2015 Microchip Technology Inc.
Product Overview
1.3.3
Feedback Resistors
The output voltage on the MIC2125/6 evaluation boards, which are preset to 1.2V, is
determined by the feedback divider:
EQUATION 1-1:
R1
V OUT = V REF 1 + -------------------------
R BOTTOM
Where:
VREF
0.6V
RBOTTOM
R4 = 0.9V
R5 = 1.0V
R6 = 1.2V
R7 = 1.5V
R8 = 1.8V
R9 = 2.5V
R10 = 3.3V
R11 = 5V
OPEN = 0.6V
All other voltages not listed above can be set by modifying RBOTTOM value according
to Equation 1-2.
EQUATION 1-2:
R1 V REF
R BOTTOM = ---------------------------------V OUT – V REF
Note that the output voltage should not be set to exceed 5V due to the 6.3V voltage
rating on the output capacitors.
1.3.4
SW Node
Test point J1 (VSW) is placed for monitoring the switching waveform, one of the most
critical waveforms for the converter.
1.3.5
Current Limit
The MIC2125/6 use the RDS(ON) of the low-side MOSFET and an external resistor
connected from the ILIM pin to the SW node to determine the current limit.
In each switching cycle of the MIC2125/6, the inductor current is sensed by monitoring
the low-side MOSFET in the OFF period. The sensed voltage V(ILIM) is compared with
the power ground (PGND) after a blanking time of 150 ns. In this way, the drop voltage
over resistor R17 (VCL) is compared with the drop over the bottom FET, generating the
short current limit. The small capacitor (C18) connected from the ILIM pin to PGND
filters the switching node ringing during the OFF-time, allowing a better short current
limit measurement. The time constant created by R17 and C18 should be much less
than the minimum OFF-time.
The VCL drop allows the programming of the short current limit through the value of the
resistor (RCL). If the absolute value of the voltage drop on the bottom FET is greater
than VCL, then V(ILIM) is lower than PGND and a short-circuit event is triggered. A hiccup
cycle is then generated to treat the short-circuit event.
2015 Microchip Technology Inc.
DS20005469A-page 13
MIC2125/6 Demonstration Board User’s Guide
The hiccup sequence, including the soft-start, reduces the stress on the switching FETs
and protects the load and supply in severe short conditions.
FIGURE 1-2:
MIC2125/6 Current-Limiting Circuit.
The short-circuit current-limit can be programmed by using the following formula.
EQUATION 1-3:
I CLIM + PP 0.5 R DS ON – V CL
R17 = ---------------------------------------------------------------------------------------------I CL
Where:
ICLIM
Desired Current Limit
∆PP
Inductor Current Peak-to-Peak
RDS(ON)
On-Resistance of Low-Side Power MOSFET
VCL
Current-Limit Threshold (Typical Value is 14 mV)
ICL
Current-Limit Source Current (Typical Value is 36 µA)
The MOSFET RDS(ON) varies 30% to 40% with temperature; therefore, it is
recommended to add a 50% margin to ICL in the equation above to avoid false current
limiting due to any rise in MOSFET junction temperature. It is also recommended to
connect the SW pin directly to the drain of the low-side MOSFET to accurately sense
the MOSFET’s RDS(ON).
1.3.6
Loop Gain Measurement
The resistor, R14, is placed in series with the regulator feedback path. The control loop
gain can be measured by connecting an impedance analyzer across the resistor and
selecting a resistor value in between 20Ω to 50Ω.
DS20005469A-page 14
2015 Microchip Technology Inc.
Product Overview
1.3.7
Setting the Switching Frequency
The MIC2125/6 are adjustable-frequency, synchronous buck controllers that feature a
unique adaptive ON-time control architecture. The switching frequency can be
adjusted between 200 kHz and 750 kHz by changing the resistor divider network, which
consists of R19 and R20.
MIC2125/6
VDD/PVDD
VDD
5V
4.7μF
AGND
VIN
VIN
BST
SW
CS
R19
2.2μF
x3
FREQ
R20
FB
PGND
FIGURE 1-3:
Switching Frequency Adjustment.
The following formula gives the estimated switching frequency:
EQUATION 1-4:
R20
f SW ADJ = f O --------------------------R19 + R20
Where:
fO
Switching Frequency When R19 is 100kΩ and R20 is open; fO is typically
750 kHz.
For more precise setting, it is recommended to use the following graph.
FIGURE 1-4:
Switching Frequency vs. R20.
The evaluation board design is optimized for a switching frequency of 350 kHz. If the
switching frequency is programmed to either the lower end or higher end, the design
needs optimization.
2015 Microchip Technology Inc.
DS20005469A-page 15
MIC2125/6 Demonstration Board User’s Guide
1.4
MIC2125/6 DEMO BOARD KIT CONTENTS
This MIC2125/6 Demo Board kit includes the following items:
• MIC2125/6 Demo Board (MIC2125YML-20A-EV or MIC2126YML-20A-EV)
• Important Information Sheet
DS20005469A-page 16
2015 Microchip Technology Inc.
MIC2125/6 DEMONSTRATION BOARD
USER’S GUIDE
Chapter 2. Installation and Operation
2.1
OVERVIEW
The following sections describe how to use the MIC2125/6 Demo Board to fully evaluate and demonstrate the capabilities of the MIC2125/6 device.
2.2
GETTING STARTED
2.2.1
VIN Supply
Connect a supply to the VIN and GND terminals, paying careful attention to the polarity
and the supply range (5V < VIN < 28V). Monitor IIN with a current meter and input voltage at VIN and GND terminals with voltmeter. Do not apply power until step 2.2.4.
2.2.2
Connect Load and Monitor Output
Connect a load to the VOUT and GND terminals. The load can be either a passive
(resistive) or an active (as in an electronic load) type. A current meter may be placed
between the VOUT terminal and the load to monitor the output current. Ensure the output voltage is monitored at the VOUT terminal.
2.2.3
Enable Input
The EN pin has an on board 100kΩ pull-up resistor (R22) to VIN that allows the output
to be turned on when VDD exceeds its UVLO threshold. An EN connector is provided
on the evaluation board for users to easily access the enable feature. Applying an
external logic signal on the EN pin to pull it low or using a jumper to short the EN pin to
GND will shut off the output of the MIC2125/6 evaluation board.
2.2.4
Turn On the Power
Turn on the VIN supply and verify that the output voltage is regulated to 3.3V.
2015 Microchip Technology Inc.
DS20005469A-page 17
MIC2125/6 Demonstration Board User’s Guide
NOTES:
DS20005469A-page 18
2015 Microchip Technology Inc.
MIC2125/6 DEMONSTRATION
BOARD
Appendix A. Schematics and Layouts
A.1
INTRODUCTION
This Appendix contains the following schematics and layouts for the MIC2125/6 Demo
Board (MIC2125YML-20A-EV or MIC2126YML-20A-EV):
•
•
•
•
•
Board - Schematic (16-Lead QFN Part)
Board - Top Layer
Board - Mid Layer 1 (Ground Plane)
Board - Mid Layer 2
Board - Bottom Layer
2015 Microchip Technology Inc.
DS20005469A-page 19
MIC2125/6 Demonstration Board User’s Guide
A.2
BOARD - SCHEMATIC (16-LEAD QFN PART)
EN
D1
R22
10kΩ
1μF
R14
0Ω
178kΩ
R25
10kΩ
OPEN
10
R24
NC
VIN
G
VOUT
2Ω
C7
4.7μF
VDD
G
Q2
D5 D6D7 D8
C4
10μF
C3
10μF
R21
S1 S2 S3
49.9Ω
IRFH4234TRPB OPEN
C2
10μF
TP8
+ C1
220μF
TP13
J1
VSW
VOUT
L1
VOUT
720nH
Q3
D5 D6D7 D8
DL
R16
Q1
D5 D6D7 D8
S1 S2 S3
SW 8
4
3
VDD
U1
PVVD
C9
0.47μF
J9
R19
121kΩ
14 PG
DH
U1
7
MIC2125YML
15
EN
FREQ 6
16 VIN
PGND
5
2
R23
1Ω
GND
FB
1
TP1
TP2
AGND
13
11
12
R18
49.9kΩ
PG
R20
R15 0.1μF
0Ω
BST 9
GND
C6
OPEN
C8
OVP
TP5
TP6
ILIM
TP3
TP4
G
R17
G
S1 S2 S3
1.2kΩ
C17
4.7μF C18
Q4
D5 D6D7 D8
S1 S2 S3
IRFH4213TRPB
C12
4.7nF
C11
2.2nF
C10
0.1μF
IRFH4213TRPB
C20
100μF
C21
1μF
R3
9.09kΩ
R2
1.21Ω
R1
10kΩ
C14
100μF
C19
100μF
+ C15
OPEN
C5
OPEN
+ C13
470μF
C16
0.1μF
TP14
TP7
FB
J2
2PIN
J12
J3
R4
30.1kΩ
0.8V
2PIN
J4
2PIN
R5
15kΩ
1.0V
2PIN
2PIN
J5
2PIN
DS20005469A-page 20
R6
10kΩ
1.2V
2PIN
R7
6.65kΩ
1.5V
J6
R8
4.99kΩ
1.8V
J7
R9
3.16kΩ
2.5V
J8
R10
2.26kΩ
3.3V
J11
R11
1.37kΩ
5V
2PIN
J13
J14
R12
OPEN
2PIN
R13
OPEN
2PIN
OPEN
2015 Microchip Technology Inc.
Schematics and Layouts
A.3
BOARD - TOP LAYER
A.4
BOARD - MID LAYER 1 (GROUND PLANE)
2015 Microchip Technology Inc.
DS20005469A-page 21
MIC2125/6 Demonstration Board User’s Guide
A.5
BOARD - MID LAYER 2
A.6
BOARD - BOTTOM LAYER
DS20005469A-page 22
2015 Microchip Technology Inc.
MIC2125/6 DEMONSTRATION
BOARD
Appendix B. Bill of Materials (BOM)
TABLE B-1:
Qty.
BILL OF MATERIALS (BOM)
Reference
Description
Manufacturer
Part Number
1
C1
220 µF/35V Aluminum Capacitor
Nichicon
UHE1V221MPD6
3
C2, C3, C4
10 µF/35V, Ceramic Capacitor, X7R,
Size 1210
Murata
GRM32ER7YA106K
TDK
C3216X7R1V106K160AC
3
C14, C19,
C20
100 µF/6.3V Ceramic Capacitor, X5R, Size 1210
Murata
GRM32ER60J107M
AVX
12106D107KAT2A
3
2
2
C6, C16, C10 0.1 µF/50V Ceramic Capacitor, X7R, Size 0603
C7, C17
C8, C21
4.7 µF/10V Ceramic Capacitor, X7R, Size 0603
1 µF/6.3V Ceramic Capacitor, X7R, Size 0603
TDK
C3225X5R0J107M250AC
Murata
GRM188R71H104K
AVX
06035C104KAT2A
TDK
C1608X7R1H104K
Murata
GRM188C71A475K
AVX
0603ZD475KAT2A
TDK
CGB3B1X5R1A475K
Murata
GRM188R70J105K
AVX
06036C105KAT2A
TDK
1
C9
0.47 µF/50V Ceramic Capacitor, X7R, Size 0805 Murata
AVX
1
1
C11
2.2 nF/100V Ceramic Capacitor, X7R, Size 0603 Murata
C12
4.7 nF/50V Ceramic Capacitor, C0G, Size 0603
C1608X5R0J105K
GRM21BR71H474K
08055C474KAT2A
GRM188R72A222K
AVX
06031C222KAT2A
TDK
C1608X7R2A222K
Murata
GRM1885C1H472J
AVX
06035A471JAT2A
TDK
C1608C0G1H471J080AA
1
C13
470 µF/6.3V, 7mΩ, OSCON
Sanyo
6SEPC470MX
1
C15 (OPEN)
470 µF/6.3V, POSCAP
Sanyo
6TPB470M
1
C5 (OPEN)
100 µF/6.3V Ceramic Capacitor, X5R, Size 1210 Murata
1
C18 (OPEN)
10 pF/50V Ceramic Capacitor, C0G, Size 0603
GRM32ER60J107M
Murata
GRM1885C1H100J
AVX
06035A100JAT2A
D1 (OPEN)
1
L1
0.72 µH, 35 ASAT, 22 ARMS for 40ºC rise
Wurth
744325072
1
Q1
MOSFET, N-CH, Power SO-8
IRF
IRFH4234TRPB
2
Q3, Q4
MOSFET, N-CH, Power SO-8
IRF
IRFH4213TRPB
1
R1
10 kΩ Resistor, Size 0603, 1%
Vishay Dale
CRCW060310K0FKEA
1
R2
1.21 Ω Resistor, Size 0805, 5%
Vishay Dale
CRCW08051R21FKEA
1
R3
9.09 kΩ, 1%, 1/10W, 0603
Vishay Dale
CRCW06039K09FKEA
1
R4
30.1 kΩ Resistor, Size 0603, 1%
Vishay Dale
CRCW060330K1FKEA
Note:
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.
2015 Microchip Technology Inc.
DS20005469A-page 23
Bill of Materials (BOM)
TABLE B-1:
Qty.
BILL OF MATERIALS (BOM) (CONTINUED)
Reference
Description
Manufacturer
Part Number
1
R5
15 kΩ Resistor, Size 0603, 1%
Vishay Dale
CRCW060315K0FKEA
1
R6
10 kΩ Resistor, Size 0603, 1%
Vishay Dale
CRCW060310K0FKEA
1
R7
6.65 kΩ Resistor, Size 0603, 1%
Vishay Dale
CRCW06036K65FKEA
1
R8
4.99 kΩ Resistor, Size 0603, 1%
Vishay Dale
CRCW06034K99FKEA
1
R9
3.16 kΩ Resistor, Size 0603, 1%
Vishay Dale
CRCW06033K16FKEA
1
R10
2.26 kΩ Resistor, Size 0603, 1%
Vishay Dale
CRCW06032K26FKEA
1
R11
1.37 kΩ Resistor, Size 0603, 1%
Vishay Dale
CRCW06031K37FKEA
Vishay Dale
CRCW06030000Z0EA
R12, R13,
R25 (OPEN)
2
R14, R15
0Ω Resistor, Size 0603, 5%
1
R16
2Ω Resistor, Size 0603, 1%
Vishay Dale
CRCW06032R00FKEA
1
R17
750Ω Resistor, Size 0603, 1%
Vishay Dale
CRCW0603750RFKEA
1
R18
49.9 kΩ Resistor, Size 0603, 1%
Vishay Dale
CRCW060349K9FKEA
1
R19
178 kΩ Resistor, Size 0603, 1%
Vishay Dale
CRCW0603178KFKEA
1
R20
121 kΩ Resistor, Size 0603, 1%
Vishay Dale
CRCW0603121KFKEA
1
R21
49.9Ω Resistor, Size 0603, 1%
Vishay Dale
CRCW060349R9FKEA
2
R22, R24
10 kΩ Resistor, Size 0603, 1%
Vishay Dale
CRCW060310K0FKEA
1
R23
1Ω Resistor, Size 0603, 1%
Vishay Dale
CRCW06031R00FKEA
1
U1
28V Synchronous Buck Controllers Featuring
Adaptive ON-Time Control
Microchip
Technology Inc.
MIC2125YML
Note:
MIC2126YML
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.
2015 Microchip Technology Inc.
DS20005469A-page 24
Bill of Materials (BOM)
NOTES:
2015 Microchip Technology Inc.
DS20005469A-page 25
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07/14/15
DS20005469A-page 26
2015 Microchip Technology Inc.