Microchip Technology MIC28514 User Manual

MIC28514

Evaluation Board

User’s Guide

 2017 Microchip Technology Inc. DS50002565B

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and may be superseded by updates.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
WARRANTIES OF ANY KIND WHETHER EXPRESS OR
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OTHERWISE, RELATED TO THE INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
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and India. The Company’s quality system processes and procedures
are for its PIC
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
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and manufacture of development systems is ISO 9001:2000 certified.

®

MCUs and dsPIC® DSCs, KEELOQ

®

code hopping

QUALITY MANAGEMENT S

Trademarks

The Microchip name and logo, the Microchip logo, AnyRate, AVR,
AVR logo, AVR Freaks, BeaconThings, BitCloud, CryptoMemory,
CryptoRF, dsPIC, FlashFlex, flexPWR, Heldo, JukeBlox, K

EELOQ logo, Kleer, LANCheck, LINK MD, maXStylus,

K
maXTouch, MediaLB, megaAVR, MOST, MOST logo, MPLAB,
OptoLyzer, PIC, picoPower, PICSTART, PIC32 logo, Prochip
Designer, QTouch, RightTouch, SAM-BA, SpyNIC, SST, SST
Logo, SuperFlash, tinyAVR, UNI/O, and XMEGA 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.

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

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

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.

© 2017, Microchip Technology Incorporated, All Rights Reserved.

ISBN: 978-1-5224-1724-8

EELOQ,

DS50002565B-page 2  2017 Microchip Technology Inc.

EU Declaration of Conformity

This declaration of conformity is issued by the manufacturer.
The development/evaluation tool is designed to be used for research and development in a laboratory environment. This
development/evaluation tool is not a Finished Appliance, nor is it intended for incorporation into Finished Appliances that are made
commercially available as single functional units to end users under EU EMC Directive 2004/108/EC and as supported by the European
Commission's Guide for the EMC Directive 2004/108/EC (8th February 2010).
This development/evaluation tool complies with EU RoHS2 Directive 2011/65/EU.
This development/evaluation tool, when incorporating wireless and radio-telecom functionality, is in compliance with the essential
requirement and other relevant provisions of the R&TTE Directive 1999/5/EC and the FCC rules as stated in the declaration of conformity
provided in the module datasheet and the module product page available at www.microchip.com.

For information regarding the exclusive, limited warranties applicable to Microchip products, please see Microchip’s standard terms and

conditions of sale, which are printed on our sales documentation and available at www.microchip.com.
Signed for and on behalf of Microchip Technology Inc. at Chandler, Arizona, USA.

Object of Declaration: MIC28514 Evaluation Board User’s Guide

 2017 Microchip Technology Inc. DS50002565B-page 3

NOTES:

DS50002565B-page 4  2017 Microchip Technology Inc.

MIC28514 EVALUATION BOARD

USER’S GUIDE

Table of Contents

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

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

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

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

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

The Microchip Web Site ........................................................................................ 9

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

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

Chapter 1. Product Overview

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

1.2 MIC28514 Evaluation Board Overview ........................................................ 11

1.3 MIC28514 Evaluation Board Features ......................................................... 12

1.4 What the MIC28514 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 ................................................................................................... 15

2.3.3 Current Limit .............................................................................................. 15

2.3.4 Loop Gain Measurement ........................................................................... 15

2.3.5 Setting the Switching Frequency ............................................................... 15

2.3.6 Setting the Soft Start Time ........................................................................ 16

2.3.7 Auxiliary Bootstrap LDO (EXTVDD) .......................................................... 16

Appendix A. Schematic and Layouts

A.1 Introduction .................................................................................................. 17

A.2 Board – Schematic ....................................................................................... 18

A.3 Board – Top Silk .......................................................................................... 19

A.4 Board – Top Copper and Silk ....................................................................... 19

A.5 Board – Top Copper .................................................................................... 20

A.6 Board – MID Copper Layer 1 ....................................................................... 20

A.7 Board – Mid Copper Layer 2 ........................................................................ 21

A.8 Board – Bottom Copper .............................................................................. 21

A.9 Board – Bottom Copper and Silk ................................................................. 22

Appendix B. Bill of Materials (BOM)...........................................................................23

Worldwide Sales and Service ....................................................................................26

 2017 Microchip Technology Inc. DS50002565B-page 5

MIC28514 Evaluation Board User’s Guide

DS50002565B-page 6  2017 Microchip Technology Inc.

MIC28514 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 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 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
MIC28514 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 MIC28514 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 MIC28514

Evaluation Board.

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

starting the MIC28514 Evaluation Board.

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

diagrams for the MIC28514 Evaluation Board.

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

MIC28514 Evaluation Board.

 2017 Microchip Technology Inc. DS50002565B-page 7

MIC28514 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)

{ ...
}

DS50002565B-page 8  2017 Microchip Technology Inc.

RECOMMENDED READING

This user’s guide describes how to use the MIC28514 Evaluation Board. Another
useful document is listed below. The following Microchip document is available and
recommended as a supplemental reference resource:

• MIC28514 Data Sheet – “75V/5A Hyper Speed Control® Synchronous DC/DC
Buck Regulator with External Soft Start” (DS20005693)

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 B (May 2017)

• Updated Figure 2-1.

Revision A (February 2017)

• Initial Release of this Document.

 2017 Microchip Technology Inc. DS50002565B-page 9

MIC28514 Evaluation Board User’s Guide

NOTES:

DS50002565B-page 10  2017 Microchip Technology Inc.

MIC28514 EVALUATION BOARD

Chapter 1. Product Overview

1.1 INTRODUCTION

This chapter provides an overview of the MIC28514 Evaluation Board and covers the
following topics:

• MIC28514 Evaluation Board Overview

• MIC28514 Evaluation Board Features

• What the MIC28514 Evaluation Board Kit Contains

1.2 MIC28514 EVALUATION BOARD OVERVIEW

The MIC28514 Evaluation Board is a constant frequency, synchronous buck controller
featuring a unique adaptive on-time control architecture. The MIC28514 operates over
an input supply range of 4.5V to 75V. The output voltage is adjustable down to 0.6V
with an ensured accuracy of ±1%. The device operates with a programmable switching
frequency from 270 kHz to 800 kHz.

USER’S GUIDE

FIGURE 1-1: MIC28514 Evaluation Board.

 2017 Microchip Technology Inc. DS50002565B-page 11

MIC28514 Evaluation Board User’s Guide

1.3 MIC28514 EVALUATION BOARD FEATURES

The MIC28514 Evaluation Board:

• Features a Soft Start (SS) time selection pin, which allows the user to adjust the
output Soft Start time to reduce inrush current from mains during start-up.

• Features six selectable output voltages: 0.8V, 1.2V, 2.5V, 3.3V, 5V and 12V.

• Features an auxiliary bootstrap Low Dropout (LDO) which improves the system
efficiency by supplying the internal bias power from the output of the converter.

• Features a logic level Enable (EN) signal that 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.

The basic parameters of the evaluation board are:

• Input: 10V to 75V (optimized for 48V)

• Output: 0.8V, 1.2V, 2.5V, 3.3V, 5V or 12V Selectable through jumper J10 at 5A
(default option is set to 5V)

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

1.4 WHAT THE MIC28514 EVALUATION BOARD KIT CONTAINS

The MIC28514 Evaluation Board includes the following items:

• MIC28514 Evaluation Board (ADM00804)

• Important Information Sheet

DS50002565B-page 12  2017 Microchip Technology Inc.

MIC28514 EVALUATION BOARD

Chapter 2. Installation and Operation

2.1 SYSTEM AND CONFIGURATION REQUIREMENTS

The MIC28514 Evaluation Board requires only a single power supply with at least 5A
current capability. The MIC28514 has an internal V
lator is required to power the internal biasing of the IC. In applications with V
PV

should be tied to VIN to bypass the internal linear regulator. The output load can

DD

either be a passive or an active load.

Note: The MIC28514 Evaluation Board does not have reverse polarity protection.

2.2 BOARD SETUP

Follow these steps prior to using the MIC28514 Evaluation Board:

1. Connect a supply to the V
and the supply range (10V < V
input voltage at the 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 MIC28514 Evaluation Board.

4. Turn on the V
specific selected voltage.

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

OUT

could damage the device.

IN

IN

and GND terminals with a voltmeter. Do not apply power

IN

OUT

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

supply and verify that the output voltage is regulated to the

IN

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

IN

and GND terminals, paying attention to the polarity

< 75V). Monitor IIN with a current meter, and the

IN

and GND terminals. The load can be either a passive

terminal.

OUT

and GND terminals may damage the

IN

USER’S GUIDE

LDO so no external linear regu-

DD

<+5.5V,

IN

 2017 Microchip Technology Inc. DS50002565B-page 13

MIC28514 Evaluation Board User’s Guide

PV

DD

SW

FB

R

20

R

2

EN

C

10

R

15

V

OUT

L

1

MIC28514

C

1

BST

C

4

P

GND

V

IN

up to 75V

PG

C

OUT

V

DD

C

9

R

14

SS

FREQ

V

IN

R

7

R

8

A

GND

C

5

R

9

SV

IN

V

IN

R

11

I

LIM

EXTVDD

C

8

EXTVDD

C

IN

C

3

C

7

R

12

V

DD

V

DD

PG

R

10

R

3

R

4

R

5

R

6

R

18

R

19

V

IN

R

1

EN

R

bot

R3V

REF



V

OUTVREF

–

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

Where:

V

REF

= 0.6V

R

3

= 10 kOhm

2.3 CIRCUIT DESCRIPTION

This section describes the working principles and limitations that should be taken into
account when using the MIC28514 Evaluation Board. The external components have
been selected in order to optimize performance for the specific conditions of V
and V
voltages, further optimization (fine-tuning of the inductor, output capacitors and ripple
injection components) can be done in order to improve efficiency and transient
response.

= 5V. Although the application will behave correctly for other output and input

OUT

IN

= 48V

FIGURE 2-1: Evaluation Board Circuit Description.

2.3.1 Feedback Resistors

The output voltages available on the MIC28514 Evaluation Board are: 0.8V, 1.2V, 2.5V,

3.3V, 5V and 12V, which are selectable using jumper J10.

Voltages other than the ones already available can be set by modifying the R
resistors according to Equation 2-1.

DS50002565B-page 14  2017 Microchip Technology Inc.

EQUATION 2-1:

Note that the output voltage should not be set to exceed 15V due to the 16V voltage
rating on the output capacitors.

For output voltage higher than 15V, output capacitors of a voltage rating higher than the
set output voltage should be used.

bot

Installation and Operation

Where:

I

CLIM

= Desired output current limit

∆IL

PP

= Inductor current peak-to-peak

R

DS(ON)

= On resistance of low-side power MOSFET(25 mΩ)

I

CL

= Current-limit source current, the typical value is 135 µA

R11 =

(I

CLIM

+ ILPP  0.5)  R

DS(ON)

I

CL

2.3.2 SW Node

Test point J2 (VSW) is placed for monitoring the switching waveform, one of the most
critical waveforms for the converter.

2.3.3 Current Limit

The MIC28514 Evaluation Board uses the low-side MOSFET R

DS(ON)

to sense
inductor current. In each switching cycle of the MIC28514 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 the low-side MOSFET is on. An internal
current source of 135 µA generates a voltage across the external Current-Limit
Resistor, R

The I

LIM

MOSFET and the voltage across the resistor (V

.

CL

Pin Voltage (V

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

ILIM

). The sensed voltage, V

CL

ILIM

, 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

CL

), the
MIC28514 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 internal MOSFETs, and protects the load and supply from severe short conditions.

The short-circuit current limit can be programmed by using the formula shown in

Equation 2-2.

EQUATION 2-2:

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 into
Hiccup mode and may not finish the Soft Start successfully.

The MOSFET R

DS(ON)

recommended to add a 30% margin to the I
current limiting due to an increased MOSFET junction temperature rise.

2.3.4 Loop Gain Measurement

Resistor R20 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 10Ω to 50Ω.

2.3.5 Setting the Switching Frequency

The MIC28514 Evaluation Board is an adjustable frequency, synchronous buck
converter featuring a unique adaptive on-time control architecture. The switching

 2017 Microchip Technology Inc. DS50002565B-page 15

frequency can be adjusted between 270 kHz and 800 kHz by changing the resistor
divider network consisting of R

can vary up to 30%-40% with temperature. Therefore, it is

in the above equation to avoid false

CLIM

and R8.

7

MIC28514 Evaluation Board User’s Guide

f

SW

f

0

R

8

R7R8+

------------------ -



=

Where:

f

0

= Switching Frequency when FREQ pin is connected to the input voltage, f0 is

typically 800 kHz

C

3

I

SStSS



V

REF

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

Where:

C

3

= Capacitor from SS pin to A

GND

I

SS

= Internal Soft Start current (1.4 µA typical)

t

SS

= Output Soft Start time

V

REF

= Reference voltage (0.6V)

Equation 2-3 shows the estimated switching frequency:

EQUATION 2-3:

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.

2.3.6 Setting the Soft Start Time

The output voltage Soft Start time can be set by connecting a capacitor from SS to
A

.

GND

The value of the capacitor can be calculated using Equation 2-4:

EQUATION 2-4:

2.3.7 Auxiliary Bootstrap LDO (EXTVDD)

The MIC28514 Evaluation Board features an auxiliary bootstrap LDO which improves
the system efficiency by supplying the MIC28514 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 the output voltage to power the MIC28514, which will increase system efficiency.
The J1 jumper can be shorted to use the output voltage as EXTVDD.

, is

IN

DS50002565B-page 16  2017 Microchip Technology Inc.

Appendix A. Schematic and Layouts

A.1 INTRODUCTION

This appendix contains the following schematics and layouts for the MIC28514
Evaluation Board:

• Board – Schematic

• Board – Top Silk

• Board – Top Copper and Silk

• Board – Top Copper

• Board – MID Copper Layer 1

• Board – Mid Copper Layer 2

• Board – Bottom Copper

• Board – Bottom Copper and Silk

MIC28514 EVALUATION BOARD

USER’S GUIDE

 2017 Microchip Technology Inc. DS50002565B-page 17

DS50002565B-page 18  2017 Microchip Technology Inc.

MIC28514/0.6V to 32V

I

LIM

1

P

GND

2

SW

3

BST

4

V

IN

5

V

IN

6

V

IN

7

V

IN

8

V

IN

9

V

IN

10

V

IN

11

SW

12

SW

13

SW

14

SW

15

P

GND

16

P

GND

17

P

GND

18

P

GND

19

SW

20

PV

DD

21

P

GND

22

EXTVDD

23

EN

24

FREQ

25

MODE/SS

26

FB

27

A

GND

28

P

GND

29

V

DD

30

SV

IN

31

PG

32

EP

33

U1

V

DD

SV

IN

PV

IN

V

OUT

47 μF
16V
1210

C12

0.1 μF
16V
0603

C16

1
2

HDR-2.54 Male 1x2

J2

49.9R

06031%

R17

V

OUT

JACK Banana

1

V

OUT

1R
0603
1%

DNP

R16

1000 pF
50V
0603

DNP

C11

330 μF
25V
AL-F

C15

8.2 μH

L1

16.2k
0603
1%

R15

2.2 μF
100V
1210

C19

0.1 μF
100V

C17

2.2 μF
100V
1210

C20

PV

IN

39 μF
100V
P3.5D8H15

C21

HDR-2.54 Male 1x2

1

2

J3

0.1 μF
100V

C7

2.1k
0603
1%

R11

GND

2.2 μF
16V
0603

C4

1 μF
100V
0805

C5

2R
0603
1%

R9

GND

10k
0603
1%

R10

V

DD

PV

IN

V

DD

4700 pF

50V

0603

C1

0.1 μF
100V

C10

V

OUT

V

DD

2.2 μF
100V
1210

C18

47 μF
16V
1210

C13

47 μF
16V
1210

C14

HDR-2.54 Male 1x2

1

2

J4

JACK Banana

1

J13

JACK Banana

1

J14

JACK Banana

1

PV

IN

0R
0603

R12

10k 0603

1%

R3

20.1k
0603
1%

R7

10k
0603
1%

R8

10 pF
50V
0603

DNP

C2

0.010 μF
25V
0603

C3

1R

06031%

R13

2.2 μF
16V
0603

C8

4.7 μF
25V
0805

C9

1R

06031%

R14

1
2

HDR-2.54 Male 1x2

J1

HDR-2.54 Male 1x3

1

1

2
3

J5

PV

IN

100k
0603
5%

R1

GND

1

1

2

3

J6

GND

HDR-2.54 Male 1x2

1

2

J7

HDR-2.54 Male 1x2

1

2

J8

HDR-2.54 Male 1x2

1
2

J9

GND

0.8V

1.2V

2.5V

3.3V

5.0V

12V

HDR-2.54 Male 2x6

1234567891011

12

J10

GND

30k

R2

10k

R4

3.16k

R5

2.2k

R6

1.37k

R18

523R

R19

PGOOD

GND

GND

GND

GND

SW

FB

MODE/SS

15R

0603

1%

R20

HDR-2.54 Male 1x2

1

2

J11

HDR-2.54 Male 1x2

1

2

J12

MIC28514 Evaluation Board User’s Guide

A.2 BOARD – SCHEMATIC

A.3 BOARD – TOP SILK

Schematic and Layouts

A.4 BOARD – TOP COPPER AND SILK

 2017 Microchip Technology Inc. DS50002565B-page 19

MIC28514 Evaluation Board User’s Guide

A.5 BOARD – TOP COPPER

A.6 BOARD – MID COPPER LAYER 1

DS50002565B-page 20  2017 Microchip Technology Inc.

A.7 BOARD – MID COPPER LAYE R 2

Schematic and Layouts

A.8 BOARD – BOTTOM COPPER

 2017 Microchip Technology Inc. DS50002565B-page 21

MIC28514 Evaluation Board User’s Guide

A.9 BOARD – BOTTOM COPPER AND SILK

DS50002565B-page 22  2017 Microchip Technology Inc.

MIC28514 EVALUATION BOARD

USER’S GUIDE

Appendix B. Bill of Materials (BOM)

TABLE B-1: BILL OF MATERIALS (BOM)

Qty. Reference Description Manufacturer Part Number

1 C1 Capacitor Ceramic, 4700 pF, 50V, 10%, X7R,

SMD, 0603

1 C2 Do Not Populate – Capacitor Ceramic, 10 pF,

50V, 0.5 pF, C0G, SMD, 0603

1 C3 Capacitor Ceramic, 0.010 µF, 25V, 10%, X7R,

SMD, 0603

2 C4, C8 Capacitor Ceramic, 2.2 µF, 16V, 10%, X5R,

SMD, 0603

1 C5 Capacitor Ceramic, 1 µF, 100V, 10%, X7S,

SMD, 0805

3 C7, C10,

C17

1 C9 Capacitor Ceramic, 4.7 µF, 25V, 20%, X5R,

1 C11 Do Not Populate – Capacitor Ceramic,

3C12, C13,

C14

1 C15 Capacitor Aluminum, 330 µF, 25V, 20%,

1 C16 Capacitor Ceramic, 0.1 µF, 16V, 10%, X7R,

3C18, C19,

C20

1 C21 Capacitor Aluminum, 39 µF, 100V, 20%, RAD,

9 J1, J2, J3,

J4, J7, J8,
J9, J11, J12

2 J5, J6 Connector Header-2.54 Male, 1x3, Gold,

1 J10 Connector Header-2.54 Male, 2x6, Gold,

2 J13, J14 Connector Jack Banana Blue Female,

1 L1 Inductor, 8.2 µH, 17.1A, 20%, SMD,

1 PCB1 Printed Circuit Board Microchip Technology

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.

Capacitor Ceramic, 0.1 µF, 100V, 10%, X7R,
SMD, 0603

SMD, 0805

1000 pF, 50V, 20%, X7R, SMD, 0603

Capacitor Ceramic, 47 µF, 16V, 20%, X5R,
SMD, 1210

SMD, F

SMD, 0603

Capacitor Ceramic, 2.2 µF, 100V, 10%, X7R,
SMD, 1210

P3.5D8H15

Connector Header-2.54 Male, 1x2, Gold,

5.84MH, TH, Vertical

5.84MH, TH, Vertical

5.84MH, TH, Vertical

4.0 mm, TH, R/A

L11.3W10H10

KEMET C0603C472K5RACTU

TDK Corporation C1608C0G1H100D

Yageo Corporation CC0603KRX7R8BB103

TDK Corporation C1608X5R1C225K

TDK Corporation C2012X7S2A105K125AB

Murata Electronics
North America, Inc.

TDK Corporation C2012X5R1E475M125AB

TDK Corporation C1608X7R2A102K080AA

Yageo Corporation CC1210MKX5R7BB476

Nichicon Corporation UWT1E331MNL1GS

AVX Corporation 0603YC104KAT2A

KEMET C1210C225K1RACTU

United Chemi-Con EKZE101ELL390MH15D

FCI 77311-118-02LF

FCI 68000-103HLF

Samtec, Inc. TSW-106-07-G-D

Multicomp Inc. 24.243.5

Coilcraft XAL1010-822MEB

Inc.

GRM188R72A104KA35D

04-10614-R1

 2017 Microchip Technology Inc. DS50002565B-page 23

MIC28514 Evaluation Board User’s Guide

TABLE B-1: BILL OF MATERIALS (BOM) (CONTINUED)

Qty. Reference Description Manufacturer Part Number

2PVIN, V

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.

Connector Jack Banana Red Female,

OUT

4.0 mm, TH, R/A

Multicomp Inc. 24.243.1

DS50002565B-page 24  2017 Microchip Technology Inc.

Bill of Materials (BOM)

TABLE B-1: BILL OF MATERIALS (BOM) (CONTINUED)

Qty. Reference Description Manufacturer Part Number

1 R1 Resistor, TKF, 100k, 5%, 1/10W, SMD, 0603 Panasonic® - ECG ERJ-3GEYJ104V

1 R2 Resistor, TKF, 30k, 1%, 1/10W, SMD, 0603 Stackpole Electronics,

Inc.

4 R3, R4, R8,

R10

1 R5 Resistor, TKF, 3.16k, 1%, 1/10W, SMD, 0603 Panasonic® - ECG ERJ-3EKF3161V

1 R6 Resistor, TKF, 2.2k, 1%, 1/10W, SMD, 0603 Panasonic

1 R7 Resistor, TKF, 20k, 1%, 1/10W, SMD, 0603 Panasonic® - ECG ERJ-3EKF2002V

1 R9 Resistor, TKF, 2R, 1%, 1/4W, SMD, 0603 Vishay/Dale CRCW06032R00FKEAHP

1 R11 Resistor, TKF, 2.1k, 1%, 1/10W, SMD, 0603 Panasonic

1 R12 Resistor, TKF, 0R, 1/10W, SMD, 0603 Panasonic® - ECG ERJ-3GSY0R00V

2 R13, R14 Resistor, TKF, 1R, 1%, 1/10W, SMD, 0603 Yageo Corporation RC0603FR-071RL

1 R15 Resistor, TKF, 16.2k, 1%, 1/10W, SMD, 0603 Panasonic

1 R16 Do Not Populate – Resistor, TKF, 1R, 1%,

1 R17 Resistor, TKF, 49.9R, 1%, 1/10W, SMD, 0603 Panasonic

1 R18 Resistor, TKF, 1.37k, 1%, 1/10W, SMD, 0603 Yageo Corporation RC0603FR-071K37L

1 R19 Resistor, TKF, 523R, 1%, 1/10W, SMD, 0603 Panasonic® - ECG ERJ-3EKF5230V

1 R20 Resistor, TKF, 15R, 1%, 1/16W, SMD, 0603 Stackpole Electronics,

1 U1 MCHP Analog Switcher, Buck, 0.6V to 32V,

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.

Resistor, TKF, 10k, 1%, 1/8W, SMD, 0603 Vishay Beyschlag MCT06030C1002FP500

®

- ECG ERJ-3EKF2201V

®

- ECG ERJ-3EKF2101V

®

- ECG ERJ-3EKF1622V

Yageo Corporation RC0603FR-071RL

1/10W, SMD, 0603

®

- ECG ERJ-3EKF49R9V

Inc.

Microchip Technology

MIC28514T-E/PHA VQFN-32

Inc.

RMCF0603FT30K0

RMCF0603FT15R0

MIC28514T-E/PHA

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

Qty. Reference Description Manufacturer Part Number

1 JP1 Mechanical Hardware Jumper, 2.54 mm,

1x2, Handle Gold

1 LABEL1 Label, Assembly w/Rev. Level (Small

Modules) per MTS-0002

4 PAD1, 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 Hardware, Rubber Pad,
Cylindrical, D9.53H5.97

TE Connectivity, Ltd. 881545-2

3M SJ61A2

 2017 Microchip Technology Inc. DS50002565B-page 25

®

MIC28514 Evaluation Board User’s Guide

NOTES:

DS50002565B-page 26  2017 Microchip Technology Inc.

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DS50002565B-page 26  2017 Microchip Technology Inc.

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