Microchip Technology MIC2128 User Manual

MIC2128

Evaluation Board

User’s Guide

 2016 Microchip Technology Inc. DS50002533A

Note the following details of the code protection feature on Microchip devices:

YSTEM

CERTIFIED BY DNV

== ISO/TS 16949 ==

• 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and may be superseded by updates.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
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®

MCUs and dsPIC® DSCs, KEELOQ

®

code hopping

QUALITY MANAGEMENT S

Trademarks

The Microchip name and logo, the Microchip logo, AnyRate,
dsPIC, FlashFlex, flexPWR, Heldo, JukeBlox, KeeLoq,
KeeLoq logo, Kleer, LANCheck, LINK MD, 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.

ClockWorks, The Embedded Control Solutions Company,
ETHERSYNCH, Hyper Speed Control, HyperLight Load,
IntelliMOS, mTouch, Precision Edge, and QUIET-WIRE are
registered trademarks of Microchip Technology Incorporated
in the U.S.A.

Analog-for-the-Digital Age, Any Capacitor, AnyIn, AnyOut,
BodyCom, chipKIT, chipKIT logo, CodeGuard, dsPICDEM,
dsPICDEM.net, Dynamic Average Matching, DAM, ECAN,
EtherGREEN, In-Circuit Serial Programming, ICSP, Inter-Chip
Connectivity, JitterBlocker, KleerNet, KleerNet logo, MiWi,
motorBench, MPASM, MPF, MPLAB Certified logo, MPLIB,
MPLINK, MultiTRAK, NetDetach, Omniscient Code
Generation, PICDEM, PICDEM.net, PICkit, PICtail,
PureSilicon, RightTouch logo, REAL ICE, Ripple Blocker,
Serial Quad I/O, SQI, SuperSwitcher, SuperSwitcher II, Total
Endurance, TSHARC, USBCheck, VariSense, ViewSpan,
WiperLock, Wireless DNA, and ZENA are trademarks of
Microchip Technology Incorporated in the U.S.A. and other
countries.

SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.

Silicon Storage Technology is a registered trademark of
Microchip Technology Inc. in other countries.

GestIC is a registered trademarks 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.

© 2016, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.

ISBN: 978-1-5224-0916-8

DS50002533A-page 2  2016 Microchip Technology Inc.

Object of Declaration: MIC2128 Evaluation Board

 2016 Microchip Technology Inc. DS50002533A-page 3

NOTES:

DS50002533A-page 4  2016 Microchip Technology Inc.

MIC2128 EVALUATION BOARD

USER’S GUIDE

Table of Contents

Preface ...........................................................................................................................7

Introduction............................................................................................................ 7

Document Layout .................................................................................................. 7

Conventions Used in this Guide ............................................................................ 8

Warranty Registration............................................................................................ 8

Recommended Reading........................................................................................ 9

The Microchip Website.......................................................................................... 9

Product Change Notification Service..................................................................... 9

Customer Support ................................................................................................. 9

Document Revision History ................................................................................... 9

Chapter 1. Product Overview

1.1 Introduction ................................................................................................... 11

1.2 MIC2128 Evaluation Board Overview .......................................................... 11

1.3 MIC2128 Evaluation Board Features ........................................................... 12

1.4 What the MIC2128 Evaluation Board Kit Contains ....................................... 12

Chapter 2. Installation and Operation

2.1 System and Configuration Requirements ..................................................... 13

2.2 Board Setup ................................................................................................. 13

2.3 Circuit Description ........................................................................................ 14

2.3.1 Feedback Resistors ................................................................................... 14

2.3.2 SW Node ................................................................................................... 14

2.3.3 Current Limit .............................................................................................. 14

2.3.4 Loop Gain Measurement ........................................................................... 16

2.3.5 Setting the Switching Frequency ............................................................... 16

2.3.6 Setting the Soft-Start Time ........................................................................ 17

2.3.7 Auxiliary Bootstrap LDO (EXTVDD) .......................................................... 18

Appendix A. Schematic and Layouts

A.1 Introduction .................................................................................................. 19

A.2 Board – Schematic ....................................................................................... 20

A.3 Board – Top Silk Layer ................................................................................ 21

A.4 Board – Top Copper layer ............................................................................ 22

A.5 Board – Mid Copper Layer 1 ........................................................................ 23

A.6 Board – Mid Copper Layer 2 ........................................................................ 24

A.7 Board – Bottom Copper layer ...................................................................... 25

A.8 Board – Bottom Silk Layer ........................................................................... 26

Appendix B. Bill of Materials (BOM)...........................................................................27

Worldwide Sales and Service ....................................................................................30

 2016 Microchip Technology Inc. DS50002533A-page 5

MIC2128 Evaluation Board User ’s Guide

NOTES:

DS50002533A-page 6  2016 Microchip Technology Inc.

MIC2128 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 p age number. The numbering convention for the DS number is
“DSXXXXXXXXA”, where “XXXXXXXX” is the document number and “A” is the revision level
of the document.

For the most up-to-date information on development tools, see the MPLAB
Select the Help menu, and then Topics, to open a list of available online help files.

INTRODUCTION

This chapter contains general information that will be useful to know before using the
MIC2128 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

®

IDE online help.

DOCUMENT LAYOUT

This document describes how to use the MIC2128 Evaluation Board as a development
tool to emulate and debug firmware on a target board. The manual layout is as follows:

• Chapter 1. “Product Overview” – Important information about the MIC2128

Evaluation Board.

• Chapter 2. “Installation and Operation” – Includes instructions on installing and

starting the MIC2128 Evaluation Board.

• Appendix A. “Schematic and Layouts” – Shows the schematic and layout

diagrams for the MIC2128 Evaluation Board.

• Appendix B. “Bill of Materials (BOM)” – Lists the parts used to build the

MIC2128 Evaluation Board.

 2016 Microchip Technology Inc. DS50002533A-page 7

MIC2128 Evaluation Board User’s Guide

CONVENTIONS USED IN THIS GUIDE

This manual uses the following documentation conventions:

DOCUMENTATION CONVENTIONS

Description Represents Examples

Arial font:

Italic characters Referenced books MPLAB® IDE User’s Guide

Emphasized text ...is the only compiler...

Initial caps A window the Output window

A dialog the Settings dialog

A menu selection select Enable Programmer

Quotes A field name in a window or

dialog

Underlined, italic text with
right angle bracket

Bold characters A dialog button Click OK

N‘Rnnnn A number in verilog format,

Text in angle brackets < > A key on the keyboard Press <Enter>, <F1>

Courier New font:

Plain Courier New Sample source code #define START

Italic Courier New A variable argument file.o, where file can be

Square brackets [ ] Optional arguments mcc18 [options] file

Curly brackets and pipe
character: { | }

Ellipses... Replaces repeated text var_name [,

A menu path File>Save

A tab Click the Power tab

where N is the total number of
digits, R is the radix and n is a
digit.

Filenames autoexec.bat
File paths c:\mcc18\h
Keywords _asm, _endasm, static
Command-line options -Opa+, -Opa-
Bit values 0, 1
Constants 0xFF, ‘A’

Choice of mutually exclusive
arguments; an OR selection

Represents code supplied by
user

“Save project before build”

4‘b0010, 2‘hF1

any valid filename

[options]
errorlevel {0|1}

var_name...]
void main (void)

{ ...
}

DS50002533A-page 8  2016 Microchip Technology Inc.

RECOMMENDED READING

This user’s guide describes how to use the MIC2128 Evaluation Board. Another
useful document is listed below. The following Microchip document is available and
recommended as a supplemental reference resource:

• MIC2128YML Data Sheet – “75V, Synchronous Buck Controllers Featuring
Adaptive On-Time Control” (DS20005620A)

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 (September 2016)

• Initial release of this document.

 2016 Microchip Technology Inc. DS50002533A-page 9

MIC2128 Evaluation Board User’s Guide

NOTES:

DS50002533A-page 10  2016 Microchip Technology Inc.

MIC2128 EVALUATION BOARD

Chapter 1. Product Overview

1.1 INTRODUCTION

This chapter provides an overview of the MIC2128 Evaluation Board and covers the
following topics:

• MIC2128 Evaluation Board Overview

• MIC2128 Evaluation Board Features

• What the MIC2128 Evaluation Board Kit Contains

1.2 MIC2128 EVALUATION BOARD OVERVIEW

The MIC2128 Evaluation Board is a constant-frequency, synchronous buck controller
featuring a unique adaptive on-time control architecture. The MIC2128 operates over
an input supply range of 4.5V to 75V. The output voltage is adjustable down to 0.6V
with a guaranteed accuracy of ±1%. The device operates with programmable switching
frequency from 270 kHz to 800 kHz.

USER’S GUIDE

FIGURE 1-1: MIC2128 Evaluation Board Overview.

 2016 Microchip Technology Inc. DS50002533A-page 11

MIC2128 Evaluation Board User’s Guide

1.3 MIC2128 EVALUATION BOARD FEATURES

The MIC2128 Evaluation Board:

• Features soft-start (SS) time selection pin which allows the user to adjust the
output soft-start time to reduce inrush current from mains during startup

• Features an auxiliary bootstrap low-dropout (LDO) which improves the system
efficiency by supplying the internal bias power from the output of the converter. A
logic level enable (EN) signal can be used to enable or disable the controller.

• Can start up monotonically into a pre-biased output

• Features an open drain power good signal (PG) which signals when the output is
in regulation

• Operates in discontinuous conduction mode during soft start at light loads

The basic parameters of the evaluation board are:

• Input: 7V to 75V (Optimized for 48V)

• Output: 5V at 5A

• 300 kHz Switching Frequency (adjustable 270 kHz to 800 kHz)

1.4 WHAT THE MIC2128 EVALUATION BOARD KIT CONTAINS

The MIC2128 Evaluation Board includes the following items:

• MIC2128 Evaluation Board (ADM00770)

• Important Information Sheet

DS50002533A-page 12  2016 Microchip Technology Inc.

MIC2128 EVALUATION BOARD

Chapter 2. Installation and Operation

2.1 SYSTEM AND CONFIGURATION REQUIREMENTS

The MIC2128 Evaluation Board requires only a single power supply with at least 10A
current capability. The MIC2128 has internal V
is required to power the internal biasing of the IC. In the applications with V
P

should be tied to VIN to by-pass the internal linear regulator. The output load can

VDD

either be a passive or an active load.

Note: The MIC2128 Evaluation Board does not have reverse polarity protection.

2.2 BOARD SETUP

Follow these steps prior to using the MIC2128 Evaluation Board:

1. Connect a supply to the V
polarity and the supply range (7V < V
and input voltage at V
until Step 4.

2. Connect a load to the V
(resistive) or an active (electronic) type. A current meter may be placed between
the V
voltage is monitored at the V

3. Enable Input. 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 MIC2128 Evaluation Board.

4. Turn on the V

Applying a negative voltage to the V
the device. The maximum V
on the V

terminal and load to monitor the output current. Ensure the output

OUT

could damage the device.

VIN

and GND terminals, paying careful attention to the

IN

and GND terminals with voltmeter. Do not apply power

VIN

and GND terminals. The load can be either a passive

OUT

OUT

supply and verify that the output voltage is regulated to 5V.

VIN

of the board is rated at 75V. Exceeding 75V

VIN

VIN

terminal.

LDO so no external linear regulator

DD

and GND terminals may damage

VIN

< 75V). Monitor IIN with a current meter

USER’S GUIDE

<+5.5V,

IN

 2016 Microchip Technology Inc. DS50002533A-page 13

MIC2128 Evaluation Board User’s Guide

V

OUT

V

REF

1

R10
R11

--------- -+





=

R11

R10 V

REF



V

OUT

V

REF

–

-------------------------------- -=

2.3 CIRCUIT DESCRIPTION

This section describes the working principles and limitations that should be taken into
account when using the MIC2128 Evaluation Board.

2.3.1 Feedback Resistors

The output voltage on the MIC2128 Evaluation Board, which is preset to 5V, is
determined by the feedback divider:

EQUATION 2-1: EQUATION 1

The MIC2128 output is optimized for 5V output. All other voltages other than 5V can be
set by modifying R11 value according to:

EQUATION 2-2: EQUATION 2

where:

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.

For output voltage higher than 5V, output capacitors and EXTV
(C13) of voltage rating higher than the set output voltage should be used.

= 0.6V

pin bypass capacitor

DD

2.3.2 SW Node

Test point JU3 (VSW) is placed for monitoring the switching waveform, one of the most
critical waveforms for the converter.

2.3.3 Current Limit

The MIC2128 Evaluation Board uses the low-side MOSFET R
current. In each switching cycle of the MIC2128 converter, the inductor current is
sensed by monitoring the voltage across the low-side MOSFET during the OFF period
of the switching cycle during which low-side MOSFET is ON. An internal current source
of 96 µA generates a voltage across the external current limit setting resistor RCL as
show in Figure 2-1.

The ILIM pin voltage (V
MOSFET and the voltage across the resistor (VCL). The sensed voltage VILIM is
compared with the power ground (PGND) after a blanking time of 150 ns.

If the absolute value of the voltage drop across the low-side MOSFET is greater than
the absolute value of the voltage across the current setting resistor (V
triggers the current limit event. Consecutive eight current limit events trigger the Hiccup
mode. The hiccup sequence, including the soft start, reduces the stress on the switch­ing field-effect transistors (FETs) and protects the load and supply from severe short
conditions.

) is the difference of the voltage across the low-side

ILIM

to sense inductor

DS(ON)

), the MIC2128

CL

DS50002533A-page 14  2016 Microchip Technology Inc.

Installation and Operation

R

7

I

CLIMPP

0.5+R

DSON

VCL+

I

CL

---------------------------------------------------------------------------------------- -=

SW

P

GND

V

IN

I

LIM

Control

Logic

Current

Limit

Detection

+

-

V

CL

DL

DH

C18

R7

L1

I

CL

The short circuit current limit can be programmed by using the following formula:

EQUATION 2-3: EQUATION 3

where:

I

CLIM



PP

R

DS(ON)

V

CL

I

CL

The short circuit current limit is depicted in Figure 2-1:

= Desired current limit
= Inductor current peak-to-peak

=

On resistance of low-side power MOSFET

= Current-limit threshold. The maximum value is +15 mV.
= Current-limit source current. The typical value is 96 µA.

FIGURE 2-1: MIC2128 Current-Limiting Circuit.

It is mandatory to make sure that the inductor current used to charge the output
capacitance during soft start is under the current limit, otherwise the supply will go in
Hiccup mode and may not finish the soft start successfully.

The MOSFET R

varies 30% to 40% with temperature. Therefore, it is

DS(ON)

recommended to add a 30% margin to ICL in the above equation to avoid false current
limiting due to increased MOSFET junction temperature rise. It is also recommended
to connect the SW pin directly to the drain of the low-side MOSFET to accurately sense
the MOSFET’s R

DS(ON)

.

 2016 Microchip Technology Inc. DS50002533A-page 15

MIC2128 Evaluation Board User’s Guide

f

SW

f

0

R3

R2 R3+

-------------------- -=

V

IN

FREQ

A

GND

MIC2128

V

VIN

R2

R3

11

16

14

2.3.4 Loop Gain Measurement

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 the resistor value between 20 to 50.

2.3.5 Setting the Switching Frequency

The MIC2128 Evaluation Board is an adjustable-frequency, synchronous buck
controller featuring a unique adaptive on-time control architecture. The switching
frequency can be adjusted between 270 kHz and 800 kHz by changing the resistor
divider network consisting of R2 and R3.

The following formula provides the estimated switching frequency:

EQUATION 2-4: EQUATION 4

where:

f

0

The evaluation board design is optimized for a switching frequency of 300 kHz. If the
switching frequency is programmed to either lower end or higher end, the design needs
optimization. The switching frequency adjustment is depicted in Figure 2-2:

= Switching Frequency when R2 is 100and R3 is open, fO is typically

800 kHz. For a more precise setting, it is recommended to use the
Switching Frequency graph from the data sheet.

FIGURE 2-2: Switching Frequency Adjustment.

DS50002533A-page 16  2016 Microchip Technology Inc.

Installation and Operation

MIC2128

g

m

0.6V

V

REF

Comparator

COMPENSATION

13

12

C

SS

I

SS

1.3 uA

FB

SS

C

19

I

SStSS



V

REF

--------------------=

2.3.6 Setting the Soft-S tart Time

The output soft-start time can be set by connecting a capacitor from SS to AGND as
shown in Figure 2-3.

FIGURE 2-3: Setting the Soft-Start Time.

The value of the capacitor can be calculated using the following equation:

EQUATION 2-5: EQUATION 5

where:

C

19

I

SS

t

SS

V

REF

 2016 Microchip Technology Inc. DS50002533A-page 17

= Capacitor from SS pin to AGND
= Internal soft-start current (1.3 µA typical)

= Output soft-start time

= Reference voltage (0.6V)

MIC2128 Evaluation Board User’s Guide

2.3.7 Auxiliary Bootstrap LDO (EXTVDD)

The MIC2128 Evaluation Board features an auxiliary bootstrap LDO which improves
the system efficiency by supplying the MIC2128 internal circuit bias power from the
converter output voltage. This LDO is enabled when the voltage on the EXTVDD pin is
above 4.6V (typical) and at the same time, the main LDO which operates from V
disabled to reduce power consumption. If the regulator output voltage is 5V and 12V,
use output voltage to power the MIC2128, which will increase system efficiency. The
JU1 jumper can be shorted to use output voltage as EXTVDD.

, is

IN

DS50002533A-page 18  2016 Microchip Technology Inc.

Appendix A. Schematic and Layouts

A.1 INTRODUCTION

This appendix contains the following schematics and layouts for the MIC2128
Evaluation Board :

• Board – Schematic

• Board – Top Silk Layer

• Board – Top Copper layer

• Board – Mid Copper Layer 1

• Board – Mid Copper Layer 2

• Board – Bottom Copper layer

• Board – Bottom Silk Layer

MIC2128 EVALUATION BOARD

USER’S GUIDE

 2016 Microchip Technology Inc. DS50002533A-page 19

DS50002533A-page 20  2016 Microchip Technology Inc.

PG

ILIM

SW

BST

DH

PGND

DL PVDD

EXTVDD

EN

FREQ

SS

FBAGNDVDD

VIN

DL

DL

DH

DH

VIN

VDD

EXTVDD

EN

VDD

0.1uF

2.2uF

C1

100uF

C2

2.2uF

C3

2.2uF

C4

C20

C5

330uF

C6 C7 C8

C21

47uF OPEN OPEN

0.1uF

L1

10uH

R14

0ё

R10

7.5Kё

R9

18Kё

R11
1Kё

C15

100nF

C17

OPEN

C16

4.7nF

Q1

Q2

Q3

Q4

R2

100Kё

R3

60Kё

C19

10nF

C13

1uF

C11

4.7uF

R5

10ё

R6
0ё

R13

0ё

R7

1.5kё

C12

0.1uF

C18

OPEN

R1
0ё

VDD

R8

10Kё

C9

0.1uF

C10

4.7uF

VIN

PGND

VOUT

PGND

1

V

VIN

VOUT

R4

0ё

JU1

JU2

JU3

R12

49.9

R15
OPEN

C14
OPEN

OPEN

D2

MIC2128

1

2

3

4

56

7

8

9

10

11

12

13

14

15

16

FB

FB

7Vto75V

5V@5A

AGND

PG

VIN

VIN

MIC2128 Evaluation Board User’s Guide

A.2 BOARD – SCHEMATIC

A.3 BOARD – TOP SILK LAYER

Schematic and Layouts

 2016 Microchip Technology Inc. DS50002533A-page 21

MIC2128 Evaluation Board User ’s Guide

A.4 BOARD – TOP COPPER LAYER

DS50002533A-page 22  2016 Microchip Technology Inc.

A.5 BOARD – MID COPPER LAYER 1

Schematic and Layouts

 2016 Microchip Technology Inc. DS50002533A-page 23

MIC2128 Evaluation Board User ’s Guide

A.6 BOARD – MID COPPER LAYER 2

DS50002533A-page 24  2016 Microchip Technology Inc.

A.7 BOARD – BOTTOM COPPER LAYER

Schematic and Layouts

 2016 Microchip Technology Inc. DS50002533A-page 25

MIC2128 Evaluation Board User ’s Guide

A.8 BOARD – BOTTOM SILK LAYER

DS50002533A-page 26  2016 Microchip Technology Inc.

MIC2128 EVALUATION BOARD

USER’S GUIDE

Appendix B. Bill of Materials (BOM)

TABLE B-1: BILL OF MATERIALS (BOM)

Qty. Reference Description Manufacturer Part Number

C1 100 µF,100V, 20%, 330 m, United Chemi-Con EMVY101ARA101MKE0S

1

C2, C3, C4 2.2 µF, X7R, 100V, 10% Murata Electronics

3

C5 330 µF,10V,17 m, Panasonic® - ECG 10SVP330M

1

C6 47 µF, X7R, 10V, 10% Murata Electronics GRM32ER71A476K

1

C7, C8 1210 mm size MLCC capacitor

0

C9, C20, C21 0.1 µF, X7R, 100V, 10% Murata Electronics GRM188R72A104K

3

C10, C11 4.7 µF, X7R, 10V, 10% Samsung Electro-Mechanics

2

C12 0.1 µF, X7R, 16V, 10% Murata Electronics GRM188R71C104K

1

C13 1uF, X7R, 10V, 10% Murata Electronics GRM188R71A105K

1

C14 0603 size capacitor

0

C15 100 nF, 100V, 10%, X7R Murata Electronics GRM188R72A104K

1

C16 4.7 nF, X7R,1 6V Murata Electronics GRM188R71C472KA

1

C17 0603 size MLCC capacitor

0

C18 0603 size MLCC capacitor

0

C19 10 nF, X7R, 6.3V,1 0% Murata Electronics GRM188R70J103K

1

PCB MIC2128 Evaluation Board Microchip Technology Inc. 02-10568

1

R1,R4,R6,R13,R14 0 , 0603 size resistor Yageo Corporation RC0603FR-070RL

5

R2 100K, 0603 size resistor Yageo Corporation RC0603FR-07100KL

1

R3 60K, 0603 size resistor Yageo Corporation RC0603FR-0760K4L

1

R5 10, 0603 size resistor Yageo Corporation RC0603FR-0710RL

1

R7 1.3K, 0603 size resistor Yageo Corporation RC0603FR-071K3L

1

R8 10K, 0603 size resistor Yageo Corporation RC0603FR-0710KL

1

R9 18K, 0603 size resistor Yageo Corporation RC0603FR-0718KL

1

R10 7.5K, 0603 size resistor Yageo Corporation RC0603FR-077K5L

1

R11 1K, 0603 size resistor Yageo Corporation RC0603FR-071KL

1

R12 49.9K, 0603 size resistor Yageo Corporation RC0603FR-0749R9L

R15 0805 size resistor

0

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.

DO NOT POPULATE

America, Inc.

DO NOT POPULATE

DO NOT POPULATE

DO NOT POPULATE

DO NOT POPULATE

®

GRM32ER72A225K

CL10B475KQ8NQNC

 2016 Microchip Technology Inc. DS50002533A-page 27

MIC2128 Evaluation Board User’s Guide

TABLE B-2: BILL OF MATERIALS (BOM) - MECHANICAL PARTS

Qty. Reference Description Manufacturer Part Number

0 D2 100V Schottky diode, power PAK S08

2 JU1, JU3 2-pin Header (100 mil pitch) TE Connectivity, Ltd. 5-146278-2

1 JU2 3-pin Header (100 mil pitch) TE Connectivity, Ltd. 5-146282-3

9 PG, AGND, VDD, EN,

EXTVDD, VIN, PGND,
VOUT, PGND

1 L1 10 µH inductor,

2 Q1, Q4 N-Channel MOSFET, power PAK S08

2 Q2, Q3 100V,40A N-Channel MOSFET, power PAK

4 VIN, PGND, VOUT,

PGND

2 Shunt Shunts with closed top,

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.

(5.15 mm X 6.15 mm)

DO NOT POPULATE

Terminal double turret
(through hole, noninsulated)

size 13.5 mm X 12.5 mm X 6.2 mm

(5.15 mm X 6.15 mm)

DO NOT POPULATE

S08 (5.15 mm X 6.15 mm)

Noninsulated banana jack Keystone

(100 mil pitch)

Keystone
Electronics Corp.

®

Bourns

Vishay
Intertechnology, Inc.

Electronics Corp.

Sullins Connector
Solutions

1593-2

, Inc. SRP1265A-100M

SIR878ADP

575-4

SPC02SYAN

DS50002533A-page 28  2016 Microchip Technology Inc.

NOTES:

Bill of Materials (BOM)

 2016 Microchip Technology Inc. DS50002533A-page 29

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06/23/16

DS50002533A-page 30  2016 Microchip Technology Inc.

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