Microchip MCP1640 Synchronous boost converter evaluation board Datasheet

MCP1640
Synchronous Boost Converter
Evaluation Board
User’s Guide
 2010 Microchip Technology Inc.
DS51880A
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DS51880A-page 2
 2010 Microchip Technology Inc.
MCP1640 SYNCHRONOUS BOOST
CONVERTER EVALUATION 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 ................................................................................... 8
Chapter 1. Product Overview
1.1 Introduction ..................................................................................................... 9
1.2 What is the MCP1640 Synchronous Boost Converter Evaluation Board? ..... 9
1.3 What the MCP1640 Synchronous Boost Converter Evaluation Board
Includes .................................................................................................. 10
Chapter 2. Installation and Operation
2.1 Introduction ................................................................................................... 11
2.2 Features ....................................................................................................... 12
2.3 Getting Started ............................................................................................. 12
Appendix A. Schematic and Layouts
A.1 Introduction .................................................................................................. 15
A.2 Board – Schematic ....................................................................................... 16
A.3 Board – Top Silk and Pads .......................................................................... 17
A.4 Board – Top Copper Layer .......................................................................... 18
A.5 Board – Bottom Copper Layer ..................................................................... 19
Appendix B. Bill of Materials (BOM)
Worldwide Sales and Service .................................................................................... 22
 2010 Microchip Technology Inc.
DS51880A-page 3
MCP1640 Synchronous Boost Converter Evaluation Board User’s Guide
NOTES:
DS51880A-page 4
 2010 Microchip Technology Inc.
MCP1640 SYNCHRONOUS BOOST
CONVERTER 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 on-line help.
Select the Help menu, and then Topics to open a list of available on-line help files.
INTRODUCTION
This chapter contains general information that will be useful to know before using the
MCP1640 Synchronous Boost Converter 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 MCP1640 Synchronous Boost Converter
Evaluation Board as a development tool. The manual layout is as follows:
• Chapter 1. “Product Overview” – Important information about the MCP1640
Synchronous Boost Converter Evaluation Board.
• Chapter 2. “Installation and Operation” – Includes instructions on how to get
started with this user’s guide and a description of the user’s guide.
• Appendix A. “Schematic and Layouts” – Shows the schematic and layout
diagrams for the MCP1640 Synchronous Boost Converter Evaluation Board.
• Appendix B. “Bill of Materials (BOM)” – Lists the parts used to build the
MCP1640 Synchronous Boost Converter Evaluation Board.
 2010 Microchip Technology Inc.
DS51880A-page 5
MCP1640 Synchronous Boost Converter 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
DS51880A-page 6
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)
{ ...
}
 2010 Microchip Technology Inc.
Preface
RECOMMENDED READING
This user's guide describes how to use MCP1640 Synchronous Boost Converter
Evaluation Board. Other useful documents are listed below. The following Microchip
documents are available and recommended as supplemental reference resources.
• MCP1640/B/C/D Data Sheet (DS22234)
This data sheet provides detailed information regarding the MCP1640 device.
• 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:
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• General Technical Support – Frequently Asked Questions (FAQs), technical
support requests, online discussion groups, Microchip consultant program
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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://support.microchip.com
 2010 Microchip Technology Inc.
DS51880A-page 7
MCP1640 Synchronous Boost Converter Evaluation Board User’s Guide
DOCUMENT REVISION HISTORY
Revision A (February 2010)
• Initial Release of this Document.
DS51880A-page 8
 2010 Microchip Technology Inc.
MCP1640 SYNCHRONOUS BOOST
CONVERTER EVALUATION BOARD
USER’S GUIDE
Chapter 1. Product Overview
1.1
INTRODUCTION
The MCP1640 is a compact, high-efficiency, fixed frequency, step-up DC-DC converter.
It provides 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 MCP1640 automatically selects the best operating mode for efficiency, Pulse
Width Modulation (PWM) or Pulse Frequency (PFM); it has a low quiescent current
(20 µA), a wide input voltage range (0.35 to 5.5V) and low start-up voltage (0.65V).
The MCP1640 is available in SOT-23-6 and 2x3mm-8 DFN packages.
This chapter provides an overview of the MCP1640 Boost Controller Evaluation Board
and covers the following topics:
• What is the MCP1640 Synchronous Boost Converter Evaluation Board?
• Contents of the MCP1640 Synchronous Boost Converter Evaluation Board
L1
4.7 µH
VIN
0.9V To 1.7V
SW V
OUT
VIN
ALKALINE
+
-
FIGURE 1-1:
1.2
CIN
4.7 µF
EN
VOUT
3.3V @ 100 mA
536 k
VFB
COUT
10 µF
309 k
GND
Typical MCP1640 Boost Converter Single Cell Battery Input.
WHAT IS THE MCP1640 SYNCHRONOUS BOOST CONVERTER
EVALUATION BOARD?
The MCP1640 Synchronous Boost Converter Evaluation Board is used to evaluate and
demonstrate Microchip Technology’s MCP1640 products. This board demonstrates the
MCP1640 in two boost-converter applications with multiple output voltages. It can be
used to evaluate both package options (SOT-23-6 and 2x3-8 DFN). The MCP1640
Synchronous Boost Converter 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.
 2010 Microchip Technology Inc.
DS51880A-page 9
MCP1640 Synchronous Boost Converter Evaluation Board User’s Guide
An enable (EN Switch selection) is used to enable and disable the MCP1640. When
enabled, the MCP1640 will regulate the output voltage; when disabled, the MCP1640
disconnects the path from input to output for “true-disconnect”.
Additional, MCP1640 options provide continuous switching and input to output bypass.
For more information on these options, refer to the MCP1640/B/C/D datasheet.
1.3
CONTENTS OF THE MCP1640 SYNCHRONOUS BOOST CONVERTER
EVALUATION BOARD
This MCP1640 Synchronous Boost Converter Evaluation Board kit includes:
• One MCP1640 Synchronous Boost Converter Evaluation Board unit, 102-00283
• Important Information "Read First"
DS51880A-page 10
 2010 Microchip Technology Inc.
MCP1640 SYNCHRONOUS BOOST
CONVERTER EVALUATION BOARD
USER’S GUIDE
Chapter 2. Installation and Operation
2.1
INTRODUCTION
The MCP1640 is a compact, high-efficiency, fixed frequency, synchronous step-up
dc-dc converter. It provides an easy-to-use power supply solution for applications
powered by one-cell, two-cell, or three-cell alkaline, NiCd, NiMH, one-cell Li-Ion or
Li-Polymer batteries in addition to distributed 3.3V to 5.0V applications.
The MCP1640 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. Additional device features are: automatic PWM / PFM
transition to optimize efficiency, low device quiescent current (20 µA in PFM mode and
1 µA in stand-by mode), multiple and selectable, logic controlled shutdown states (true
load disconnect or “bypass”, output connected to input), low noise and discontinuous
current anti-ring control.
4,7 µH
3.3V
U1
P1
1
SW
2 GND
3
EN
VIN
VOUT
FB
+ VOUT
_
GND
P1
2.0V
6
5
4
VOUT SEL
C2
10 µF
MCP1640
SOT-23-6
1
C1
10 µF
2
1
EN Switch
1
2
L1
324 k
1
RT2
GND _
1
536 k
1
RT1
+
VIN
RB1
309 k
Note: Calculate RT resistors
for a particular VOUT as:
P1
S1
P1
RT = RB * ((VOUT / VFB) -1)
S1
P1
VFB = 1.21V
FIGURE 2-1:
MCP1640 Synchronous Boost SOT-23-6 Application.
Two enable mode options are available: true disconnect and bypass. 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. The bypass option uses the synchronous boost converter P-Channel
switch to connect the input to the output through the boost inductor while disabled
providing voltage to the load, while consuming less than 1 µA of current from VIN.
The MCP1640 is available in SOT-23-6 and 2x3 mm DFN-8 lead packages.
 2010 Microchip Technology Inc.
DS51880A-page 11
MCP1640 Synchronous Boost Converter Evaluation Board User’s Guide
The MCP1640 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
FEATURES
The MCP1640 Synchronous Boost Converter 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; 1 mA load after startup
• 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 100 mA @ 3.3V Output, 1.2V Input or 300 mA @ 5.0V
Output, 3.3V Input
• Start-up voltage: 0.65V at VIN = 1.2V, VOUT = 3.3V and IOUT = 1mA, resistive load
• Automatic PFM/PWM Operation
• PWM Switching Frequency = 500 kHz
• Enable state selectable using mini-dip switch on board
• Peak Input Current Limit
• Overtemperature (if the die temperature exceeds 150°C, 10°C hysteresis)
2.3
GETTING STARTED
The MCP1640 Synchronous Boost Converter Evaluation Board is fully assembled and
tested to evaluate and demonstrate the MCP1640 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 MCP1640 SYNCHRONOUS BOOST CONVERTER
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 MC1640 Synchronous Boost Converter Evaluation Board has two independent
circuit applications, one using the MCP1640 SOT-23-6 package, while the other one
uses the MCP1640 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 MCP1640 switch peak current
limit will provide a safe maximum current value. The maximum output current for the
MCP1640 will vary with input and output voltages; refer to the MCP1640 datasheet for
more information on the maximum output current. As an example, the MCP1640 can
typically supply a 3.3V load with 100 mA with a 1.2V input.
DS51880A-page 12
 2010 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 MCP1640 datasheet for more information on
the maximum load. Typically, the MCP1640 can supply a 3.3V output with
100 mA from a 1.2V input source. 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. Set the enable to the desired state using the EN mini dip switch.
4. When EN is set ON or high, the MCP1640 is enabled and VOUT can be measured
on the VOUT and GND terminals. When EN is low, the MCP1640 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
FIGURE 2-2:
2.3.1.3
V -meter
V -meter
1.2V Cell
Resistive (min
33Ω/1W)
MCP1640 Evaluation Board Setup.
EN AND VOUT SEL SWITCHES FUNCTION
TABLE 2-1:
FUNCTION OF BOARD SWITCHES
State of Switches
SW3 or SW4
EN Switch
VOUT [V] for
SW1 or SW2
VOUT SEL Switch
SOT-23-6
Converter
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.
 2010 Microchip Technology Inc.
DS51880A-page 13
MCP1640 Synchronous Boost Converter Evaluation Board User’s Guide
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 the open or OFF position, the output voltage can be calculated
using the following equation:
V OUT
RT 1 = RB 1   ------------- – 1
V FB
OR
V OUT
–1
RT 4 = RB 2   ----------- V FB-
Where: VFB = 1.21V
Note:
DS51880A-page 14
The VOUT SELL switch will not be used.
 2010 Microchip Technology Inc.
MCP1640 SYNCHRONOUS BOOST
CONVERTER EVALUATION BOARD
USER’S GUIDE
Appendix A. Schematic and Layouts
A.1
INTRODUCTION
This appendix contains the following schematics and layouts for the MCP1640
Synchronous Boost Converter Evaluation Board:
•
•
•
•
Board – Schematic
Board – Top Silk and Pads
Board – Top Copper Layer
Board – Bottom Copper Layer
 2010 Microchip Technology Inc.
DS51880A-page 15
MCP1640 Synchronous Boost Converter Evaluation Board User’s Guide
A.2
BOARD – SCHEMATIC
DS51880A-page 16
 2010 Microchip Technology Inc.
Schematic and Layouts
A.3
BOARD – TOP SILK AND PADS
 2010 Microchip Technology Inc.
DS51880A-page 17
MCP1640 Synchronous Boost Converter Evaluation Board User’s Guide
A.4
BOARD – TOP COPPER LAYER
DS51880A-page 18
 2010 Microchip Technology Inc.
Schematic and Layouts
A.5
BOARD – BOTTOM COPPER LAYER
 2010 Microchip Technology Inc.
DS51880A-page 19
MCP1640 Synchronous Boost Converter Evaluation Board User’s Guide
NOTES:
DS51880A-page 20
 2010 Microchip Technology Inc.
MCP1640 SYNCHRONOUS BOOST
CONVERTER 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 CER 10UF 10V X7R 0805
Murata Electronics
North America
GRM21BR71A106KE51L
0
C3, C4, C6, C7
CAP TANT LOW ESR SMD
6032-EIA / C case
1
C5
CAP CER 10UF 10V X7R 1206
Murata Electronics
North America
GRM31CR71A106KA01L
2
L1, L2
INDUCTOR POWER 4.7UH 2.0A
SMD
EPCOS Inc
B82462G4472M
1
PCB
RoHS Compliant Bare PCB,
MCP1640 Sync Boost Converter
Evaluation Board
Microchip Technology 104-00283
Inc.
—
—
2
RB1, RB2
RES 309K OHM 1/8W 1% 0805 SMD Rohm Semiconductor MCR10EZPF3093
1
RT1
RES 536K OHM 1/8W 1% 0805 SMD Yageo
1
RT2
RES 324K OHM 1/8W 1% 0805 SMD Rohm Semiconductor MCR10EZPF3243
1
RT4
RES 976K OHM 1/8W 1% 0805 SMD Rohm Semiconductor MCR10EZHF9763
1
RT5
RES 1.20M OHM 1/8W 1% 0805
SMD
Rohm Semiconductor MCR10EZHF1204
4
SW1, SW2,
SW3, SW4
SWITCH SLIDE SPDT SMD GULL
Copal Electronics Inc
CJS-1200TB
8
TP1, TP2, TP3,
TP5, TP6, TP7,
TP8, TP9
PC Test Point Compact SMT
Keystone Electronics
5016
1
U1
MCP1640 Syncronous Boost
Converter - SOT23-6
Microchip Technology MCP1640
Inc.
1
U2
MCP1640 Syncronous Boost
Converter – DFN2x3mm
Microchip Technology MCP1640
Inc.
Note 1:
RC0805FR-07536KL
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.
 2010 Microchip Technology Inc.
DS51880A-page 21
WORLDWIDE SALES AND SERVICE
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Technical Support:
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Web Address:
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Kokomo
Kokomo, IN
Tel: 765-864-8360
Fax: 765-864-8387
Los Angeles
Mission Viejo, CA
Tel: 949-462-9523
Fax: 949-462-9608
Santa Clara
Santa Clara, CA
Tel: 408-961-6444
Fax: 408-961-6445
Toronto
Mississauga, Ontario,
Canada
Tel: 905-673-0699
Fax: 905-673-6509
Australia - Sydney
Tel: 61-2-9868-6733
Fax: 61-2-9868-6755
China - Beijing
Tel: 86-10-8528-2100
Fax: 86-10-8528-2104
China - Chengdu
Tel: 86-28-8665-5511
Fax: 86-28-8665-7889
Korea - Daegu
Tel: 82-53-744-4301
Fax: 82-53-744-4302
China - Chongqing
Tel: 86-23-8980-9588
Fax: 86-23-8980-9500
Korea - Seoul
Tel: 82-2-554-7200
Fax: 82-2-558-5932 or
82-2-558-5934
China - Hong Kong SAR
Tel: 852-2401-1200
Fax: 852-2401-3431
Malaysia - Kuala Lumpur
Tel: 60-3-6201-9857
Fax: 60-3-6201-9859
China - Nanjing
Tel: 86-25-8473-2460
Fax: 86-25-8473-2470
Malaysia - Penang
Tel: 60-4-227-8870
Fax: 60-4-227-4068
China - Qingdao
Tel: 86-532-8502-7355
Fax: 86-532-8502-7205
Philippines - Manila
Tel: 63-2-634-9065
Fax: 63-2-634-9069
China - Shanghai
Tel: 86-21-5407-5533
Fax: 86-21-5407-5066
Singapore
Tel: 65-6334-8870
Fax: 65-6334-8850
China - Shenyang
Tel: 86-24-2334-2829
Fax: 86-24-2334-2393
Taiwan - Hsin Chu
Tel: 886-3-6578-300
Fax: 886-3-6578-370
China - Shenzhen
Tel: 86-755-8203-2660
Fax: 86-755-8203-1760
Taiwan - Kaohsiung
Tel: 886-7-536-4818
Fax: 886-7-536-4803
China - Wuhan
Tel: 86-27-5980-5300
Fax: 86-27-5980-5118
Taiwan - Taipei
Tel: 886-2-2500-6610
Fax: 886-2-2508-0102
China - Xian
Tel: 86-29-8833-7252
Fax: 86-29-8833-7256
Thailand - Bangkok
Tel: 66-2-694-1351
Fax: 66-2-694-1350
Italy - Milan
Tel: 39-0331-742611
Fax: 39-0331-466781
Netherlands - Drunen
Tel: 31-416-690399
Fax: 31-416-690340
Spain - Madrid
Tel: 34-91-708-08-90
Fax: 34-91-708-08-91
UK - Wokingham
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
01/05/10
DS51880A-page 22
 2010 Microchip Technology Inc.
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