MCP16251 and MCP1640B
Synchronous Boost Converters
Evaluation Board
User’s Guide
2013 Microchip Technology Inc.
DS50002110B
Note the following details of the code protection feature on Microchip devices:
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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
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•
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
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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
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Information contained in this publication regarding device
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Printed on recycled paper.
ISBN: 978-1-62077-320-8
QUALITY MANAGEMENT SYSTEM
CERTIFIED BY DNV
== ISO/TS 16949 ==
DS50002110B-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.
2013 Microchip Technology Inc.
Object of Declaration: MCP16251 and MCP1640B Synchronous Boost Converters Evaluation Board
2013 Microchip Technology Inc.
DS50002110B-page 3
MCP16251 and MCP1640B Synchronous Boost Converters Evaluation Board User’s Guide
NOTES:
DS50002110B-page 4
2013 Microchip Technology Inc.
MCP16251 AND MCP1640B
SYNCHRONOUS BOOST CONVERTERS
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 ................................................................................. 10
Chapter 1. Product Overview
1.1 Introduction ................................................................................................... 11
1.2 What is the MCP16251 and MCP1640B Synchronous Boost Converters
Evaluation Board? .................................................................................. 12
1.3 What the MCP16251 and MCP1640B Synchronous Boost Converters
Evaluation Board Contains ..................................................................... 12
Chapter 2. Installation and Operation
2.1 Introduction ................................................................................................... 13
2.2 Board Features ............................................................................................. 14
2.3 Getting Started ............................................................................................. 14
2.3.1 Power Input and Output Connection ......................................................... 14
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 – Bottom Copper ............................................................................... 20
Appendix B. Bill of Materials (BOM)
Worldwide Sales and Service .................................................................................... 22
2013 Microchip Technology Inc.
DS50002110B-page 5
MCP16251 and MCP1640B Synchronous Boost Converters Evaluation Board User’s Guide
NOTES:
DS50002110B-page 6
2013 Microchip Technology Inc.
MCP16251 AND MCP1640B
SYNCHRONOUS BOOST CONVERTERS
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 page number. The numbering convention for the DS number is
“DSXXXXXA”, where “XXXXX” is the document number and “A” is the revision level of the
document.
For the most up-to-date information on development tools, see the MPLAB® 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
MCP16251 and MCP1640B Synchronous Boost Converters Evaluation 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 MCP16251 and MCP1640B Synchronous
Boost Converters Evaluation Board as a development tool. The manual layout is as
follows:
• Chapter 1. “Product Overview” – Important information about the MCP16251
and MCP1640B Synchronous Boost Converters Evaluation Board.
• Chapter 2. “Installation and Operation” – Includes instructions on how to get
started with this user’s guide and a description of the board.
• Appendix A. “Schematic and Layouts” – Shows the schematic and layout
diagrams for the MCP16251 and MCP1640B Synchronous Boost Converters
Evaluation Board.
• Appendix B. “Bill of Materials (BOM)” – Lists the parts used to build the
MCP16251 and MCP1640B Synchronous Boost Converters Evaluation Board.
2013 Microchip Technology Inc.
DS50002110B-page 7
MCP16251 and MCP1640B Synchronous Boost Converters Evaluation Board User’s Guide
CONVENTIONS USED IN THIS GUIDE
This manual uses the following documentation conventions:
DOCUMENTATION CONVENTIONS
Description
Arial font:
Italic characters
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
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
Represents code supplied by
user
DS50002110B-page 8
Examples
File>Save
Press <Enter>, <F1>
#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}
var_name [,
var_name...]
void main (void)
{ ...
}
2013 Microchip Technology Inc.
Preface
RECOMMENDED READING
This user’s guide describes how to use the MCP16251 and MCP1640B Synchronous
Boost Converters Evaluation Board. Other useful documents are listed below. The
following Microchip documents are available and recommended as supplemental
reference resources.
• MCP16251/2 Data Sheet – Low Quiescent Current, PFM/PWM Synchronous
Boost Regulator with True Output Disconnect or Input/Output Bypass
Option (DS25173)
This data sheet provides detailed information regarding the MCP16251/2 device.
• MCP1640/B/C/D Data Sheet – “0.65V Start-up Synchronous Boost Regulator
with True Output Disconnect or Input/Output Bypass Option” (DS22234)
This data sheet provides detailed information regarding the MCP1640B device.
• MCP1623/24 Data Sheet – “Low-Voltage Input Boost Regulator for PIC®
Microcontrollers” (DS41420)
This data sheet provides detailed information regarding the MCP1623/4device.
• AN1311 – “Single Cell Input Boost Converter Design” (DS01311)
This application note details how to use the MCP1640 device in specific applications.
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.
2013 Microchip Technology Inc.
DS50002110B-page 9
MCP16251 and MCP1640B Synchronous Boost Converters Evaluation Board User’s Guide
DOCUMENT REVISION HISTORY
Revision B (July 2013)
• Updated Appendix B. “Bill of Materials (BOM)”.
Revision A (April 2013)
• Initial Release of this Document.
DS50002110B-page 10
2013 Microchip Technology Inc.
MCP16251 AND MCP1640B
SYNCHRONOUS BOOST CONVERTERS
EVALUATION BOARD USER’S GUIDE
Chapter 1. Product Overview
1.1
INTRODUCTION
The MCP16251 and MCP1640B devices are compact, high-efficiency, fixed frequency,
step-up DC-DC converters. These products provide an easy-to-use power supply
solution, with a minimum number of external components for applications powered by
one-cell, two-cell, or three-cell alkaline, NiCd, NiMH, one-cell Li-Ion or Li-Polymer
batteries.
The MCP16251 automatically selects the best operating mode for efficiency,
pulse-width modulation (PWM) or pulse frequency (PFM). The device has a very low
quiescent current 4 µA (not switching, measured at output), a wide input voltage range
(0.35 to 5.5V) and a low start-up voltage (0.82V) at 1 mA load current.
The MCP1640B is a PWM-only controller, with a typical of 19 µA quiescent current (not
switching, measured at output), a wide input voltage range (0.35V to 5.5V) and a
start-up voltage of 0.65V at 1 mA load current.
The major differences between the two device families (MCP16251/2 and
MCP1640/B/C/D) are the very low quiescent current for the MCP16251/2, and the
voltage reference (1.21V for the MCP1640/B/C/D, 1.23V for the MCP16251/2,
respectively).
The available package types for these devices are: SOT-23-6 and 2x3 mm (T)DFN-8.
The scope of this evaluation board is to demonstrate the low quiescent current for the
PWM/PFM MCP16251 device, and the low-noise output for the MCP1640B PWM-only
option.
This chapter provides an overview of the MCP16251 and MCP1640B Synchronous
Boost Converters Evaluation Board, and covers the following topics:
• What is the MCP16251 and MCP1640B Synchronous Boost Converters Evaluation Board?
• What the MCP16251 and MCP1640B Synchronous Boost Converters Evaluation
Board Contains
L1
4.7 µH
VIN
0.9V to 1.7V
SW V
OUT
VIN
Alkaline
+
-
FIGURE 1-1:
2013 Microchip Technology Inc.
CIN
4.7 µF
VOUT
3.3V @ 75 mA
1.69 M
VFB
EN
COUT
10 µF
1 M
GND
Typical MCP16251 Boost Converter Single-Cell Battery Input.
DS50002110B-page 11
MCP16251 and MCP1640B Synchronous Boost Converters Evaluation Board User’s Guide
1.2
WHAT IS THE MCP16251 AND MCP1640B SYNCHRONOUS BOOST
CONVERTERS EVALUATION BOARD?
The MCP16251 and MCP1640B Synchronous Boost Converters Evaluation Board is
used to evaluate and demonstrate Microchip Technology’s MCP16251 and MCP1640B
products. This board demonstrates the MCP16251/MCP1640B in two boost-converter
applications with multiple output voltages. It can be used to evaluate both package
options (SOT-23-6 and 2x3 mm 8-(T)DFN). The MCP16251 and MCP1640B
Synchronous Boost Converters Evaluation Board was developed to help engineers
reduce the product design cycle time.
Three common output voltages can be selected: 2.0V, 3.3V and 5.0V. The output
voltage can be changed with a mini-dip switch that changes the external resistor
divider.
A switch connected to the EN pin is used to enable and disable the converters. When
enabled, the MCP16251/MCP1640B will regulate the output voltage; when disabled,
the MCP16251/MCP1640B disconnects the path from input to output for
“true-disconnect”.
1.3
WHAT THE MCP16251 AND MCP1640B SYNCHRONOUS BOOST
CONVERTERS EVALUATION BOARD CONTAINS
This MCP16251 and MCP1640B Synchronous Boost Converters Evaluation Board kit
includes:
• MCP16251 and MCP1640B Synchronous Boost Converters Evaluation Board
(ADM00458)
• Important information sheet
DS50002110B-page 12
2013 Microchip Technology Inc.
MCP16251 AND MCP1640B
SYNCHRONOUS BOOST CONVERTERS
EVALUATION BOARD USER’S GUIDE
Chapter 2. Installation and Operation
2.1
INTRODUCTION
The MCP1640B is capable of regulating the output voltage over a wide 2.0V to 5.5V
range, and typically can deliver over 100 mA of load current at 3.3V output when
supplied from a single 1.2V cell. The input voltage range is 0.35V to 5.5V with a low
0.65V start-up voltage. The regulated output voltage (VOUT) should be greater than or
equal to the input voltage (VIN). In particular, the MCP1640B is PWM-only with True
Disconnect shutdown option.
The MCP16251 can regulate the output voltage over a 1.8V to 5.5V range, and can
deliver a minimum of 75 mA of load current at 3.3V VOUT when supplied from a one
alkaline battery. Compared to the MCP1640B, the MCP16251 has both pulse-width
modulation (PWM) and pulse frequency modulation (PFM) operating modes, and
automatically selects the best operating mode for efficiency.
VIN
GND _
_ GND
4,7 µH
L1
VOUT1
U1
EN Switch
1 SW
2 GND
3
EN
RT2
+ VOUT
RT1
+
6
VOUT 5
FB 4
VOUT2
VIN
C1
10 µF
VOUT SEL
C2
10 µF
RB1
Note:
Calculate RT resistors for a particular VOUT as:
VOUT
R T = RB ------------- – 1
VFB
VFB = 1.23V (for MCP16251)
VFB = 1.21V (for MCP1640B)
FIGURE 2-1:
Synchronous Boost Application for SOT-23-6 package type.
When disabled, the True Disconnect option removes the normal boost topology path
from input to output by opening the diode path, using a P-Channel synchronous switch
with a reversible body diode.
2013 Microchip Technology Inc.
DS50002110B-page 13
MCP16251 and MCP1640B Synchronous Boost Converters Evaluation Board User’s Guide
The MCP16251 and MCP1640B Synchronous Boost Converters Evaluation Board
offers both package types in two boost-converter applications for 2.0V, 3.3V and 5.0V
output voltage options that can be selected using a mini-dip switch. The enable input
is controlled in both boost converter applications using a mini-dip switch.
2.2
BOARD FEATURES
The MCP16251 and MCP1640B Synchronous Boost Converters Evaluation Board has
the following features:
• It can be powered by one-cell, two-cell, or three-cell alkaline, NiCd, NiMH,
one-cell Li-Ion or Li-Polymer batteries
• Input voltage range (VIN): 0.35V to 5.5V, with VIN VOUT
• Fixed output voltage: 2.0V or 3.3V and 3.3V or 5.0V, selected using a mini-dip
switch on board
• Output current: typical 125 mA @ 3.3V Output, 1.5V Input or 200 mA @ 5.0V
Output, 3V Input
• Start-up voltage: 0.82V (for MCP16251’s Converter) or 0.65V (for MCP1640B’s
Converter) at VOUT = 3.3V and IOUT = 1mA, resistive load
• Automatic PFM/PWM Operation for the MCP16251 Converter
• PWM Switching Frequency = 500 kHz
• Enable state, selectable using the mini-dip switch on board
• Peak Input Current Limit (800mA for MCP1640 or 650mA for MCP16251)
• Overtemperature Protection
2.3
GETTING STARTED
The MCP16251 and MCP1640B Synchronous Boost Converters Evaluation Board is
fully assembled and tested to evaluate and demonstrate the MCP16251 and the
MCP1640B products. This board requires the use of external lab supplies and load.
2.3.1
Power Input and Output Connection
2.3.1.1
POWERING THE MCP16251 AND MCP1640B SYNCHRONOUS BOOST
CONVERTERS EVALUATION BOARD
Soldered test points are available for input voltage connections. The maximum input
voltage should not exceed 6.0V. The output voltage will not remain in regulation for
input voltages that are greater than or equal to the output voltage.
The MCP16251 and MCP1640B Synchronous Boost Converters Evaluation Board has
two independent circuit applications, one using the MCP16251 SOT-23-6 package,
while the other uses the MCP1640B DFN-8 package. The SOT-23-6 package has two
output voltage settings (2.0V and 3.3V) selectable by an on-board mini-dip switch. The
DFN-8 package has two output voltage settings (3.3V and 5.0V), also selectable by an
on-board mini-dip switch.
Soldered test points are available to connect a load. The switch peak current limit will
provide a safe maximum current value. The maximum output current for the converters
will vary with input and output voltages; refer to the MCP16251/2 and MCP1640/B/C/D
data sheets for more information on the maximum output current.
DS50002110B-page 14
2013 Microchip Technology Inc.
Installation and Operation
2.3.1.2
BOARD POWER-UP PROCEDURE
1. Connect system load to VOUT and GND terminals; maximum load varies with
input and output voltage (see the MCP16251/2 and MCP1640/B/C/D data sheets
for more information on the maximum load). Connect the (+) side of the load to
VOUT and the negative (-) load to ground (GND).
2. Set the desired output voltage using the VOUT SEL mini-dip switch.
3. Turn the device ON/OFF using the EN mini-dip switch.
4. When EN is set ON or high, the converter is enabled and VOUT can be measured
on the VOUT and GND terminals. When EN is low, the converter is disabled and
VOUT is floating, and disconnected from the input.
Capacitors C3, C4, C6 and C7 are not populated. The component pads are provided for
experimental use.
VOUT SEL switch
between 2 and 3.3V
A-meter
A-meter
V-meter
V-meter
Resistive
(100Ω/1W)
1.2V Cell
FIGURE 2-2:
MCP16251 and MCP1640B Synchronous Boost Converters Evaluation Board Setup.
2013 Microchip Technology Inc.
DS50002110B-page 15
MCP16251 and MCP1640B Synchronous Boost Converters Evaluation Board User’s Guide
2.3.1.3
EN AND VOUT SEL SWITCHES FUNCTION
Table 2-1 shows how the switches affect the functionality of the evaluation board.
TABLE 2-1:
FUNCTION OF BOARD SWITCHES
State of Switches
VOUT [V] for
SW3 or SW4
EN Switch
SW1 or SW2
VOUT SEL Switch
MCP16251T-E/CH
SOT-23-6
Converter
MCP1640BT-I/MC
2x3 mm DFN
Converter
ON
ON
2
3.3
ON
OFF
3.3
5
OFF
ON
0
0
OFF
OFF
0
0
Note that SW2 (VOUT SEL) and SW4 (EN) are used for the SOT-23-6 circuit. Switches
SW1 (VOUT SEL) and SW3 (EN) are used for the 2x3 mm DFN-8 circuit.
2.3.1.4
ADJUSTABLE VOUT SETTING
The resistor divider RT and RB are used to set the converter output voltage. By setting
the VOUT SEL switch in ON or OFF position, the output voltage can be calculated using
the following equation:
EQUATION 2-1:
V OUT
RT 1 = RB 1 ------------- – 1
V FB
or
V OUT
RT 4 = RB 2 ------------- – 1
V FB
Where: VFB = 1.21V for MCP1640B
VFB = 1.23V for MCP16251
Note:
DS50002110B-page 16
If the feedback loop is recalculated, the VOUT SEL switch will not be used,
as it will add a resistor in parallel with the calculated component.
2013 Microchip Technology Inc.
MCP16251 AND MCP1640B
SYNCHRONOUS BOOST CONVERTERS
EVALUATION BOARD USER’S GUIDE
Appendix A. Schematic and Layouts
A.1
INTRODUCTION
This appendix contains the following schematics and layouts for the MCP16251 and
MCP1640B Synchronous Boost Converters Evaluation Board:
•
•
•
•
•
Board – Schematic
Board – Top Silk
Board – Top Copper and Silk
Board – Top Copper
Board – Bottom Copper
2013 Microchip Technology Inc.
DS50002110B-page 17
BOARD – SCHEMATIC
VIN +
1
1
TP5
L1
TP2
GND
C1
+
dnp
10UF
1M
1
TP3
2.0V
3.3V
U1
6
1
VIN
SW
2
5
GND VOUT
3
4
EN
FB
SW4
EN SWITCH
C3
4 U7
RT2
1
RT1
GND -
1.69M
TP1
+
VOUT
-
GND
GND
SW2
C2
VOUT SEL
C4
+
10uF
Note:
Calculate RT resistors
for a particular VOUT as:
dnp
MCP16251 – SOT-23
RT = RB *((Vout/VFB) - 1)
GND GND GND
VIN +
GND
GND
GND
GND
1
2013 Microchip Technology Inc.
C6
dnp
+
EP
8
VIN
FB 1 FB
7
2
SW3
SGND VOUT
EN Switch
3 PGND VOUTP 6
C8
4
5
SW
EN
10uF
GND
1M2
RT5
976k
TP8
RT4
U2
MCP1640B – DFN 2X3mm
L2
1
9
GND -
4u7
TP9
GND
VOUT
1
TP6
GND
SW1
FB
VOUT SEL
C5
10uF
+ C7
dnp
RB2
309k
GND GND GND
1
+
TP7
GND
3.3V
5.0V
VFB = 1.23V - MCP16251
VFB = 1.21V - MCP1640B
GND GND
GND
MCP16251 and MCP1640B Synchronous Boost Converters Evaluation Board User’s Guide
DS50002110B-page 18
A.2
Schematic and Layouts
A.3
BOARD – TOP SILK
A.4
BOARD – TOP COPPER AND SILK
2013 Microchip Technology Inc.
DS50002110B-page 19
MCP16251 and MCP1640B Synchronous Boost Converters Evaluation Board User’s Guide
A.5
BOARD – TOP COPPER
A.6
BOARD – BOTTOM COPPER
DS50002110B-page 20
2013 Microchip Technology Inc.
MCP16251 AND MCP1640B
SYNCHRONOUS BOOST CONVERTERS
EVALUATION BOARD USER’S GUIDE
Appendix B. Bill of Materials (BOM)
TABLE B-1:
Qty
BILL OF MATERIALS (BOM)
Reference
Description
Manufacturer
Part Number
4
Bump
Bumpon Hemisphere 44X.20 white
3M
SJ-5003 (WHITE)
3
C1, C2, C8
Cap. ceramic 10 µF 10V X7R 0805
Murata Electronics®
GRM21BR71A106KE51L
1
C5
Cap. ceramic 10 µF 10V X7R 1206
Murata Electronics
GRM31CR71A106KA01L
1
L1
Inductor Power 4.7 µH 1.55A SMD
Wurth Electronics
744043004
1
L2
Inductor Power 4.7 µH 2.0A SMD
EPCOS AG
PCB
Printed Circuit Board – MCP16251 and
—
MCP1640B Synchronous Boost Converters
Evaluation Board
2
RB1, RT2
Res. 1000 kOhm 1/8W 1% 0805 SMD
Panasonic®-ECG
ERJ-6ENF1004V
1
RB2
Res. 309 kOhm 1/8W 1% 0805 SMD
Panasonic-ECG
ERJ-6ENF3093V
1
RT1
Res. 1690 kOhm 1/8W 1% 0805 SMD
Yageo Corporation
RC0805FR-071M69L
1
RT4
Res. 976 kOhm 1/8W 1% 0805 SMD
Panasonic-ECG
ERJ-6ENF9763V
1
RT5
Res. 1.20 MOhm 1/8W 1% 0805 SMD
Rohm Semiconductor MCR10EZHF1204
4
SW1, SW2, Switch slide SPDT SMD Gull
SW3, SW4
Nidec Copal
Electronics Inc.
CJS-1200TB
8
TP1, TP2,
TP3, TP5,
TP6, TP7,
TP8, TP9
PC test point compact SMT
Keystone
Electronics Corp.
5016
1
U1
MCP16251 Synchronous Step-up DC-DC
Converter, SOT-23
Microchip
Technology inc.
MCP16251T-I/CH
1
U2
MCP1640B Synchronous Boost Converter, Microchip
DFN 2x3 mm
Technology inc.
MCP1640BT-I/MC
Note 1:
B82462G4472M
104-00458
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.
2013 Microchip Technology Inc.
DS50002110B-page 21
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Fax: 886-3-5770-955
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Fax: 886-7-330-9305
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Tel: 86-27-5980-5300
Fax: 86-27-5980-5118
Taiwan - Taipei
Tel: 886-2-2508-8600
Fax: 886-2-2508-0102
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Tel: 86-29-8833-7252
Fax: 86-29-8833-7256
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Tel: 66-2-694-1351
Fax: 66-2-694-1350
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Tel: 39-0331-742611
Fax: 39-0331-466781
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Tel: 31-416-690399
Fax: 31-416-690340
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Tel: 34-91-708-08-90
Fax: 34-91-708-08-91
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Tel: 44-118-921-5869
Fax: 44-118-921-5820
China - Xiamen
Tel: 86-592-2388138
Fax: 86-592-2388130
China - Zhuhai
Tel: 86-756-3210040
Fax: 86-756-3210049
DS50002110B-page 22
Japan - Tokyo
Tel: 81-3-6880- 3770
Fax: 81-3-6880-3771
11/29/12
2013 Microchip Technology Inc.