Microchip Technology MCP16301 User guide

MCP16301

300 mA D2PAK

Demo Board

User’s Guide

© 2011 Microchip Technology Inc. DS51983A

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
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ensure that your application meets with your specifications.
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K

EELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, PICSTART,

32

PIC

logo, rfPIC and UNI/O are registered trademarks of
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All other trademarks mentioned herein are property of their
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© 2011, Microchip Technology Incorporated, Printed in the
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Printed on recycled paper.

ISBN: 978-1-61341-179-7

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and India. The Company’s quality system processes and procedures
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analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.

®

MCUs and dsPIC® DSCs, KEELOQ

®

code hopping

DS51983A-page 2 © 2011 Microchip Technology Inc.

MCP16301 300 mA D2PAK

DEMO 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 Web Site........................................................................................ 7

Customer Support................................................................. ................................7

Document Revision History................................................................................... 7

Chapter 1. Product Overview

1.1 Introduction .....................................................................................................9

1.2 MCP16301 Short Overview ............................................................................9

1.3 What is the MCP16301 300 mA D

1.4 What Does the MCP16301 300 mA D

2

PAK Demo Board? ...............................10

2

PAK Demo Board Kit Contain? .......10

Chapter 2. Installation and Operation

2.1 Introduction ...................................................................................................11

2.2 Getting Sta rted ............................................................................................. 12

Appendix A. Schematics and Layouts

A.1 Introduction ..................................................................................................13

A.2 Board – Schematic ... .................................................................... ................ 14

A.3 Board – Top Silk and Pads ..........................................................................15

A.4 Board – Top Copper Layer ..........................................................................15

A.5 Board – Bottom Copper Layer .....................................................................16

Appendix B. Bill of Materials (BOM)

Worldwide Sales and Service ....................................................................................18

© 2011 Microchip Technology Inc. DS51983A-page 3

MCP16301 300 mA D2PAK Demo Board Use r’s Guide

DS51983A-page 4 © 2011 Microchip Technology Inc.

MCP16301 300 mA D2PAK

DEMO 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
“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 on-line help.

INTRODUCTION

This chapter contains general information that will be useful to know before using the
MCP16301 300 mA D

• 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 MCP16301 300 mA D2PAK Demo 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 MCP16301
300 mA D

• Chapter 2. “Installation and Operation” – Includes instructions on how to get
started with MCP16301 300 mA D
user’s guide.

• Appendix A. “Schematics and Layouts” – Shows the schematic and layout
diagrams for the MCP16301 300 mA D

• Appendix B. “Bill of Materials (BOM)” – Lists the parts used to build the
MCP16301 300 mA D

2

PAK Demo Board. Items discussed in this chapt er include:

2

PAK Demo Board.

2

PAK Demo Board.

2

PAK Demo Board and a description of the

2

PAK Demo Board.

© 2011 Microchip Technology Inc. DS51983A-page 5

MCP16301 300 mA D2PAK Demo Board Use r’s Guide

CONVENTIONS USED IN THIS GUIDE

This manual uses the following docum entat io n conven tion s:

DOCUMENTATION CONVENTIONS

Description Represents Examples

Arial font:

Italic chara c ters Referenced books MPLAB

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 brac kets < > 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 r epeated text var_name [,

A menu path File>Save

A tab Click the Power tab

where N is the tota l number of
digits, R is th e radi x 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 mut ually exclus ive
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)

{ ...
}

®

IDE User’s Guide

DS51983A-page 6 © 2011 Microchip Technology Inc.

RECOMMENDED READING

This user's guide describes how to use the MCP16301 300 mA D2PAK Demo Board.
Other useful documents are listed below. The following Microchip documents are avail­able and recommended as supplemental reference resources.

• MCP16301 Data Sheet – “High Voltage Input Integrated Switch Step-Down
Regulator” (DS25004)

• AN1385 Application Note – “Dynamic Analysis of the MCP16301 Switch-
mode Power Converter Utilizing the MCP16301 Design Analyzer” (DS01385)

• MCP16301 User’s Guide – “MCP16301 600 mA Demo Board User’s Guide”
(DS51978)

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

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 web site at:
http://www.microchip.com/support.

DOCUMENT REVISION HISTORY

Revision A (May 201 1)

• Initial Release of this Document.

© 2011 Microchip Technology Inc. DS51983 A-page 7

MCP16301 300 mA D2PAK Demo Board Use r’s Guide

NOTES:

DS51983A-page 8 © 2011 Microchip Technology Inc.

Chapter 1. Product Overview

1.1 INTRODUCTION

This chapter provides an overview of the MCP16301 300 mA D2P AK Demo Board, and
covers the following topics:

• MCP16301 Short Overview

• What is the MCP16301 300 mA D

• What Does the MCP16301 300 mA D

1.2 MCP16301 SHORT OVERVIEW

The MCP16301 device is a highly integrated, high-efficiency, fixed frequency,
step-down DC-DC c onverter in a popular 6-pin SOT-23 package, that operates from
input voltage sources up to 30V. The integrated features include a high- side switch,
fixed frequency p eak current m ode control, intern al compensation , peak current limit
and overtemperature pr ote ction . Mi nim al ex ternal c omp onen ts are nee ded to d ev elo p
a high-efficiency power supply, operating from a high-voltage input.

High-converter efficiency is achieved by integrating the current limited, low resistance,
high-speed N-Channel MOSFET and associated drive circuitry. High-switching
frequency minimizes the size of the exter nal filter ing compo nents, re sulting in a sm all
solution size.

The MCP16301 300 mA D
rent, while regulat ing the ou tput vol tage from 2.0V t o 15V. An integrated, high-perfor­mance peak cu rrent mo de archit ecture keeps the output vo ltag e tightl y regula ted, ev en
during input voltage steps and outpu t current transi ent conditio ns that are common in
power systems. For this evaluation board, the external components are sized such that
they can fit into a smaller s pace than a D
nents, namely the Schottky di ode and the inductor, limit the maximum outp ut current
for this application to less than 300 mA.

MCP16301 300 mA D2PAK

DEMO BOARD USER’S GUIDE

2

PAK Demo Board?

2

PAK Demo Board Kit Contain?

2

PAK Demo Board can supply 300 mA of continuous cur-

2

PAK linear regulator. The external compo-

1N4448

V

IN

4.0V to 26V

C

IN

2.2 µF

BOOST

V

IN

EN

GND

SW

V

FB

C

BOOST

100 nF

L

1

15 µH

30V
Schottky
Diode

V

3.3V @ 150 mA

31.2 KΩ

10 KΩ

OUT

C

OUT

22 µF

FIGURE 1-1: 300 mA Typical, MCP16301 Step-Down Application.

© 2011 Microchip Technology Inc. DS51983A-page 9

MCP16301 300 mA D2PAK Demo Board Use r’s Guide

1.3 WHAT IS THE MCP16301 300 MA D2PAK DEMO BOARD?

The MCP16301 300 mA D2PAK Demo Board is designed to operate from a 4V to 26V
input and regulate the output to 3.3V while delivering 300 mA of load current. Test
points for input power and load are provided to demonstrate the capability of the demo
board over the entire range. The board was designed using small surface mount
components, to show the small board area necessary for a high-input voltage, 300 mA
design, that fits into less board area than the popular D
regulators.

1.4 WHAT DOES THE MCP16301 300 MA D2PAK DEMO BOARD KIT CONTAIN?

The MCP16301 300 mA D2PAK Demo Board kit includes:

2

• MCP16301 300 mA D

• Important Information Sheet.

PAK Demo Board (102-00360)

2

P AK, commonly used for linear

DS51983A-page 10 © 2011 Microchip Technology Inc.

Chapter 2. Installation and Operation

2.1 INTRODUCTION

2.1.1 MCP16301 Features

The MCP16301 device has been developed to provide high input voltage applications
with a precise low voltage regulated rail, while operating at high efficiency.

The key features of the MCP16301 include:

• Up to 96% Typical Efficiency

• Input Voltage Range: 4.0V to 30V

• Output Voltage Range: 2.0V to 15V

• 2% Output Voltage Accuracy

• Integrated N-Channel Buck Switch: 460 mΩ

• 600 mA Output Current

• 500 kHz Fixed Frequency

• Adjustable Output Voltage

• Low Device Shutdown Current

• Peak Current Mode Control

• Internal Compensation

• Stable with Ceramic Capacitors

• Internal Soft-Start

• Cycle-by-Cycle Peak Current Limit

• Under Voltage Lockout (UVLO): 3.5V

• Overtemperature Protection

• Available Package: SOT-23 -6

A high performance peak current mode control system is used to deliver fast response
to sudden line and load changes.

MCP16301 300 mA D2PAK

DEMO BOARD USER’S GUIDE

2.1.2 MCP16301 300 mA D2PAK Demo Board Features

The MCP16301 300 mA D2PAK Demo Board is developed to demonstrate how the
MCP16301 operates over a wide input voltage and load range. T est points are provided
for input and output, allowing the demo board to be connected directly to a system.

© 2011 Microchip Technology Inc. DS51983A-page 11

MCP16301 300 mA D2PAK Demo Board Use r’s Guide

2.2 GETTING STARTED

The MCP16301 300 mA D2PAK Demo Board is fully assembled and tested to evaluate
and demonstrate the MCP16301 capability.

2.2.1 Power Input and Output Connection

2.2.1.1 POWERING THE MCP16301 300 MA D2PAK DEMO BOARD The MCP16301 300 mA D

evaluation. Apply positive input voltage to the V
return to the GND terminal. The maximum input voltage should not exceed 26V. An
electronic load or resistive load can be used for evaluation or the intended system load
can be connected. The electronic loads attempt to sink current at 0V during startup. A
resistive load or constant resistance is recommended for startup evaluation. Connect
the positive voltage terminal of the load to the V
connect the negative or return side of the load to the GND terminal.

2.2.1.2 BOARD TESTING To test the board, follow the next steps:

1. Apply the input voltage.

2. An internal pull up resistor is connected from V
MCP16301. Once the input voltage is greater than 3.5V, the device begins to
switch. Apply greater than 4V supply to the input for proper operation. A minimum
load is required to regulate the output to 3.3V. For minimum load requirements
(light load conditions), detailed information is provided in the data sheet.

3. The measured output voltage should be 3.3V typical. 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.

2

PAK Demo Board is fully assembled, tested and ready for

terminal and the corresponding

IN

terminal on the demo board, and

OUT

to the EN input of the

IN

2.2.2 How the MCP16301 300 mA D2PAK Demo Board Boost Strap

Operates

The MCP16301 integrates a low resistance N-Channel MOSFET. A high side or
floating supply is needed to drive the gate of the N-Channel MOSFET above the input
voltage to turn it on. The demo board uses the output voltage (3.3V) to charge the boost
cap, while inductor current flows, clamping the SW node to a diode drop below ground.
Prior to start up, there is no inductor current, so an internal pre-charge circuit charges
the boost cap up to a minimum threshold. Once charged, the N-Channel can be turned
on, ramping current into the inductor.

The worst case operating conditions for charging the boost capacitor occur at minimum
V

and no load. At minimum VIN (4V), there is not enough head room to pre-charge

IN

the boost cap to a high value. At no load, the converter is operating at a minimum or
very low duty cycle, putting a small amount of current into the inductor. When the switch
turns off the inductor, current decays very quickly, resulting in a small time to recharge
the boost capacitor.

DS51983A-page 12 © 2011 Microchip Technology Inc.

Appendix A. Schematics and Layouts

A.1 INTRODUCTION

MCP16301 300 mA D2PAK

DEMO BOARD USER’S GUIDE

This appendix contains the following schematics and layouts for the
MCP16301 300 mA D

• Board – Schematic

• Board – Top Silk and Pads

• Board – Top Copper Layer

• Board – Bottom Copper Layer

2

PAK Demo Board:

© 2011 Microchip Technology Inc. DS51983A-page 13

MCP16301 300 mA D2PAK Demo Board Use r’s Guide

A.2 BOARD – SCHEMATIC

OUT

V

1

TP3

C2

22µ

GND1

0603

1

TP4

D2

R3

10k

2

0402

1

R2

2

31.6k

0603

D1

30V 1A

SCHOTTKY

1

2

1

L1

15µ

LPS3015

SOD-323

2

1

2

C3

0402

0.1 µF

U1

1

BOOST

MCP16301 SOT23

Vin

5

6

SW

EN

4

3

FB

GND

2

100k

0805

GND

2

0402

TP2

1

1

R1

C1

2.2 µ

TP1

1

VIN

DS51983A-page 14 © 2011 Microchip Technology Inc.

A.3 BOARD – TOP SILK AND PADS

Schematics and Layouts

A.4 BOARD – TOP COPPER LAYER

© 2011 Microchip Technology Inc. DS51983A-page 15

MCP16301 300 mA D2PAK Demo Board Use r’s Guide

A.5 BOARD – BOTTOM COPPER LAYER

DS51983A-page 16 © 2011 Microchip Technology Inc.

MCP16301 300 mA D2PAK

DEMO 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 CAP CER 2.2 µF 50V X5R 0805 TDK
1 C2 CAP CER 10uF 6.3V X5R 0603 Taiyo Yuden
1 C3 CAP CER 0.10uF 6.3V X5R 0402 TDK Corporation C1005X5R0J104M
1 D1 DIODE SCHOTTKY 30V 1A

PWRDI-323

1 D2 DIODE SWITCH 75V 200mW

SOD-323
1 L1 Sheilded Power Inductor 15 µH Coilcraft® Inc. LPS3015-153MLB
1 PCB RoHS Compliant Bare PCB MCP16301

1 R1 RES 1.00M OHM 1/10W 1% 0402 SMD Panasonic®-ECG ERJ-2RKF1004X
1 R2 RES 31.6K OHM 1/10W 1% 0402 SMD Panasonic-ECG ERJ-2RKF3162X
1 R3 RES 10.0K OHM 1/10W 1% 0402 SMD Panasonic-ECG ERJ-2RKF1002X
4TP1, TP2,

TP3, TP4

1 U1 MCP16301 High Input Buck Converter

2

PAK Board

D

PC TEST POINT TIN SMD Harwin Inc S1751-46R

SOT-23

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.

®

Corporation C2012X5R1H225K

®

®

Diodes

Diodes Incorporated 1N4448WS-7-F

Microchip Technology Inc. MCP16301T-I/CHY

Incorporated PD3S130HDICT-ND

— 104-00360

JMK107BJ106MA-T

© 2011 Microchip Technology Inc. DS51983A-page 17

Worldwide Sales and Service

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DS51983A-page 18 © 2011 Microchip Technology Inc.