MCP19035
300 kHz Synchronous
Buck Controller
Evaluation Board
User’s Guide
2012 Microchip Technology Inc.
DS52099A
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.
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Microchip is willing to work with the customer who is concerned about the integrity of their code.
•
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Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
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ISBN: 978-1-62076-662-0
QUALITY MANAGEMENT SYSTEM
CERTIFIED BY DNV
== ISO/TS 16949 ==
DS52099A-page 2
Microchip received ISO/TS-16949:2009 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
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and India. The Company’s quality system processes and procedures
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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.
2012 Microchip Technology Inc.
MCP19035 300 kHz Synchronous Buck Controller Evaluation Board User’s Guide
Object of Declaration: MCP19035 300 kHz Synchronous Buck Controller Evaluation Board
2012 Microchip Technology Inc.
DS52099A-page 3
MCP19035 300 kHz Synchronous Buck Controller Evaluation Board User’s Guide
NOTES:
2012 Microchip Technology Inc.
DS52099A-page 4
MCP19035 300 KHZ SYNCHRONOUS
BUCK CONTROLLER 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 MCP19035 Short Overview .......................................................................... 11
1.3 What Is the MCP19035 300 kHz Synchronous Buck Controller
Evaluation Board? .................................................................................. 12
1.4 What the MCP19035 300 kHz Synchronous Buck Controller
Evaluation Board Kit Contains ................................................................ 12
Chapter 2. Installation and Operation
2.1 Introduction ................................................................................................... 13
2.2 Getting Started ............................................................................................. 13
2.2.1 Necessary Instruments and Tools ............................................................. 13
2.2.2 Setup Procedure ....................................................................................... 13
2.2.3 Board Testing ............................................................................................ 14
Appendix A. Schematic and Layouts
A.1 Introduction .................................................................................................. 17
A.2 Board – Schematic ....................................................................................... 18
A.3 Board – Top Silk and Pads .......................................................................... 19
A.4 Board – Top Copper and Silk ....................................................................... 20
A.5 Board – Top Copper .................................................................................... 21
A.6 Board – Mid Layer 1 ..................................................................................... 22
A.7 Board – Mid Layer 2 ..................................................................................... 23
A.8 Board – Bottom Copper and Pads ............................................................... 24
A.9 Board – Bottom Copper, Silk and Pads ....................................................... 25
Appendix B. Bill of Materials
Appendix C. Typical Performance Data, Curves and Waveforms
C.1 Introduction .................................................................................................. 29
Worldwide Sales and Service .................................................................................... 36
2012 Microchip Technology Inc.
DS52099A-page 5
MCP19035 300 kHz Synchronous Buck Controller Evaluation Board User’s Guide
DS52099A-page 6
2012 Microchip Technology Inc.
MCP19035 300 KHZ SYNCHRONOUS
BUCK CONTROLLER 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
MCP19035 300 kHz Synchronous Buck Controller 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 MCP19035 300 kHz Synchronous Buck
Controller 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” – Shows a brief description of the MCP19035
300 kHz Synchronous Buck Controller Evaluation Board
• Chapter 2. “Installation and Operation” – Includes instructions on how to get
started with the MCP19035 300 kHz Synchronous Buck Controller Evaluation
Board
• Appendix A. “Schematic and Layouts” – Shows the schematic and layout
diagrams for the MCP19035 300 kHz Synchronous Buck Controller Evaluation
Board
• Appendix B. “Bill of Materials” – Lists the parts used to build the MCP19035
300 kHz Synchronous Buck Controller Evaluation Board
• Appendix C. “Typical Performance Data, Curves and Waveforms” – Shows
the typical performance graphs
2012 Microchip Technology Inc.
DS52099A-page 7
MCP19035 300 kHz Synchronous Buck Controller 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
DS52099A-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)
{ ...
}
2012 Microchip Technology Inc.
Preface
RECOMMENDED READING
This user's guide describes how to use MCP19035 300 kHz Synchronous Buck
Controller Evaluation Board. Other useful documents are listed below. The following
Microchip documents are available and recommended as supplemental reference
resources.
• MCP19035 Data Sheet – “High-Speed Synchronous Buck Controller”
(DS22326)
• AN1452 – “Using the MCP19035 Synchronous Buck Converter Design Tool”
(DS01452)
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
DOCUMENT REVISION HISTORY
Revision A (November 2012)
• Initial Release of this Document.
2012 Microchip Technology Inc.
DS52099A-page 9
MCP19035 300 kHz Synchronous Buck Controller Evaluation Board User’s Guide
NOTES:
DS52099A-page 10
2012 Microchip Technology Inc.
MCP19035 300 KHZ SYNCHRONOUS
BUCK CONTROLLER EVALUATION
BOARD USER’S GUIDE
Chapter 1. Product Overview
1.1
INTRODUCTION
This chapter provides an overview of the MCP19035 300 kHz Synchronous Buck
Controller Evaluation Board, and covers the following topics:
• Short Overview: MCP19035
• What Is the MCP19035 300 kHz Synchronous Buck Controller Evaluation Board?
• What the MCP19035 300 kHz Synchronous Buck Controller Evaluation Board Kit
Contains
1.2
SHORT OVERVIEW: MCP19035
The MCP19035 is a highly-featured, highly-integrated, Synchronous Buck Controller in
a space-saving 10-pin DFN 3 x 3 mm package, that operates from input voltage
sources up to 30V. Integrated features include high and low-side MOSFET drivers,
fixed-frequency voltage mode control, internal oscillator and reference voltage
generator, overcurrent protection on both the high- and low-side devices, Power Good
circuit and overtemperature protection. A minimal number of external components are
necessary to develop a complete, high-performance Synchronous Buck Converter
power supply.
The MCP19035 Synchronous Buck Controller is intended to be used for applications
requiring medium to high-output currents (up to 20A) and input voltages up to 30V.
Typical applications include:
•
•
•
•
Medium current Point-of-Load converters
FPGA/DSP power supplies
Digital Set-Top boxes
Industrial 24V rails converters
The internal linear voltage regulator (LDO) allows low current loads (for example, PIC
microcontrollers) to be powered directly from this controller without any additional
components.
2012 Microchip Technology Inc.
DS52099A-page 11
MCP19035 300 kHz Synchronous Buck Controller Evaluation Board User’s Guide
+VIN
CIN
ON
MCP19035
SHDN
OFF
BOOT
Q1
CBOOT
HDRV
VIN
L
PHASE
PWRGD
C2
COMP
LDRV
FB
+VCC
COUT
CVCC
GND
C3
+VOUT
Q2
R4
R1
C1
R3
R2
FIGURE 1-1:
1.3
Typical Application.
WHAT IS THE MCP19035 300 KHZ SYNCHRONOUS BUCK CONTROLLER
EVALUATION BOARD?
The MCP19035 300 kHz Synchronous Buck Controller Evaluation Board is a compact,
highly efficient, step-down voltage regulator that will convert the input voltage rail
(typically 12V) to 1.8V regulated output voltage. The maximum output current for this
step-down converter is 15A. The board demonstrates the capabilities of the MCP19035
300 kHz synchronous buck converter, as well as Microchip’s high-performance power
MOSFET transistors. Test points for various signals are provided for measuring
different parameters of the converter. The evaluation board can be modified to support
output voltages from 0.9V to 3.3V by changing a single resistor.
1.4
WHAT THE MCP19035 300 KHZ SYNCHRONOUS BUCK CONTROLLER
EVALUATION BOARD KIT CONTAINS
The MCP19035 300 kHz Synchronous Buck Controller Evaluation Board kit includes:
• MCP19035 300 kHz Synchronous Buck Controller Evaluation Board (ADM00434)
• Important Information Sheet
DS52099A-page 12
2012 Microchip Technology Inc.
MCP19035 300 KHZ SYNCHRONOUS
BUCK CONTROLLER EVALUATION
BOARD USER’S GUIDE
Chapter 2. Installation and Operation
2.1
INTRODUCTION
The MCP19035 300 kHz Synchronous Buck Controller Evaluation Board was developed to provide a compact, low-cost and highly efficient step-down conversion for low
to medium output currents.
The key features of this board include:
• Input Voltage Range: 8V to 14V
• Output Voltage: 1.8V (can be adjusted by changing one resistor between 0.9V
and 3.3V)
• Maximum Output Current: 15A
• 91% typical efficiency at 1.8V/15A output and 12V input
• 300 kHz fixed switching frequency
• On-board High Performance Power MOSFET Transistors
• Overcurrent Protection for High and Low-Side MOSFETs
• Power Good (PGOOD) output for monitoring the output voltage quality
• Shutdown input for placing the converter in a low-power Standby mode
• Under Voltage Lockout (UVLO) with 4.2V and 3.6V (typical) thresholds
2.2
GETTING STARTED
The MCP19035 300 kHz Synchronous Buck Controller Evaluation Board is fully
assembled and tested to evaluate and demonstrate the MCP19035 capabilities.
2.2.1
Necessary Instruments and Tools
The list of required instruments and tools include:
•
•
•
•
•
•
Adjustable DC power supply with 0V – 15V/5 ADC range output capability
Electronic load with at least 25A current capability and load stepping capability
Digital oscilloscope with a minimum bandwidth of 50 MHz
Digital voltmeter/ammeter
Optionally, a Network Analyzer/Bode Plot Analyzer for loop analysis
Wires for connections: they must sustain high current, 5A for the connection
between adjustable DC power supply and board, 15A for the connection between
board and the electronic load
2.2.2
Setup Procedure
To power-up the MCP19035 300 kHz Synchronous Buck Controller Evaluation Board,
the following steps must be completed:
1. Connect the Electronic Load to J2 connector of the demo board; the positive (+)
and negative (-) connector pins are marked on the board silkscreen.
2. Connect the Adjustable DC Power Supply to J1 connector on the demo board;
the positive (+) and negative (-) connector pins are marked on the board silkscreen.
3. The DC voltage supplied by the Adjustable DC Power Supply should be 12V.
2012 Microchip Technology Inc.
DS52099A-page 13
MCP19035 300 kHz Synchronous Buck Controller Evaluation Board User’s Guide
2.2.3
Board Testing
The typical test setup is depicted in Figure 2-1. Table 2-1 shows all the available test
points on the board.
The user can connect various instruments at the listed test points to evaluate the
parameters of the converter. The typical performance data, curves and waveforms are
shown in Appendix C. “Typical Performance Data, Curves and Waveforms”.
FIGURE 2-1:
Typical Test Setup.
TABLE 2-1:
TEST POINTS DESCRIPTION
Test Point
TP1, TP8, TP12, TP15
Description
GND
Power GND
SGND
Signal GND
TP2
VIN
Input voltage
TP3
SHDN
TP7, TP16, TP19
TP4
SHDN
TP5
PGOOD
TP6
Shutdown input pull-up resistor
Shutdown input
Power Good output
EXTPGOOD External Pull-up for PGOOD signal
TP9
HIGHDR
TP10
LOWDR
TP11
SW
TP13
PREBIAS
TP14
VOUT
TP17, TP18
DS52099A-page 14
Label
High-Side MOSFET drive signal
Low-Side MOSFET drive signal
Main switch node
Pre-bias load point
Output Voltage
CH A, CH B Signal Injection points for loop measurement
2012 Microchip Technology Inc.
Installation and Operation
2.2.3.1
ADJUSTING THE OUTPUT VOLTAGE
The output voltage can be modified by changing the value of R12 from the feedback
divider. The output voltage is set according to Equation 2-1.
EQUATION 2-1:
OUTPUT VOLTAGE
R11 + R12
V OUT = V REF --------------------------R12
Where:
VREF = 0.6V
R11 = 20 k
Do not modify the value of the R11 resistor (20 k), as this will affect the system’s loop
compensation.
Some parameters, including efficiency, overcurrent protection thresholds, and input
and output voltage ripple, can be affected by the modification of the output voltage.
Table 2-2 shows the standard values of R12 resistor for some usual output voltages.
TABLE 2-2:
2012 Microchip Technology Inc.
OUTPUT VOLTAGE VERSUS R12 VALUE
VOUT (V)
R12 (k)
0.9
40.2
1
30
1.2
20
1.5
13.3
1.8
10
2
8.45
2.25
7.32
2.5
6.34
3.3
4.42
DS52099A-page 15
MCP19035 300 kHz Synchronous Buck Controller Evaluation Board User’s Guide
NOTES:
DS52099A-page 16
2012 Microchip Technology Inc.
MCP19035 300 KHZ SYNCHRONOUS
BUCK CONTROLLER EVALUATION
BOARD USER’S GUIDE
Appendix A. Schematic and Layouts
A.1
INTRODUCTION
This appendix contains the following schematics and layouts for the
MCP19035 300 kHz Synchronous Buck Controller Evaluation Board:
•
•
•
•
•
•
•
•
Board – Schematic
Board – Top Silk and Pads
Board – Top Copper and Silk
Board – Top Copper
Board – Mid Layer 1
Board – Mid Layer 2
Board – Bottom Copper and Pads
Board – Bottom Copper, Silk and Pads
2012 Microchip Technology Inc.
DS52099A-page 17
BOARD – SCHEMATIC
TP1
GND
1
J1
1
2
ED120/2DS
TP2
TP10
TP9
LOWDR HIGHDR
1
1
TP11
SW
1
PGND
TP8
GND
1
TP12
GND
1
PGND
PGND
1
VIN
C3
C1
C2
22uF 22uF 10uF
R1
5.1k
TP3
R2
100k
PGND
R3
0
G
1
D
Q1
MCP87050
S
1
SHDN
C4
R5
3
6.8nF
C10
7.5k
68pF
4
5
C11
1uF
R8
1
COMP
BOOT
LOWDR
VIN
PWRGD
GND
VCC
10
PGND
1
PGOOD
2012 Microchip Technology Inc.
R12
10k
R14
10k
TP6
1
1
SGND
SGND
J2
2
1
1
1
TP17
CH A
1
TP18
CH B
SGND
TP16
GND
1
SGND
NET_TIE_0.5 mm
0 NT1
SGND
C6
C8
C7
C9
100uF 100uF 100uF 1uF
GND
PGND
R10
TP19
GND
1
1
VOUT
TP15
PGND
49.9
C13
MCP87022
Q2
11
20k
820pF
0.33uF G
S
R11
750
D
ED120/2DS
PGND
R13
TP14
1.5uH/19.5A
C12
4.7uF
0805
EXTPGOOD
TP7
GND
3.3
7
C5
6
R9
5.1k
TP5
PGOOD
R6
8
1
B0530WS
L1
9
100k
Q3
2N7002-7-F
5.1k
PHASE
MCP19035
R7
PGOOD
TP4
HIGHDR
FB
TP13
R4
100
U1
2
D1
SGND
PGND
MCP19035 300 kHz Synchronous Buck Controller Evaluation Board User’s Guide
DS52099A-page 18
A.2
Schematic and Layouts
A.3
BOARD – TOP SILK AND PADS
2012 Microchip Technology Inc.
DS52099A-page 19
MCP19035 300 kHz Synchronous Buck Controller Evaluation Board User’s Guide
A.4
BOARD – TOP COPPER AND SILK
DS52099A-page 20
2012 Microchip Technology Inc.
Schematic and Layouts
A.5
BOARD – TOP COPPER
2012 Microchip Technology Inc.
DS52099A-page 21
MCP19035 300 kHz Synchronous Buck Controller Evaluation Board User’s Guide
A.6
BOARD – MID LAYER 1
DS52099A-page 22
2012 Microchip Technology Inc.
Schematic and Layouts
A.7
BOARD – MID LAYER 2
2012 Microchip Technology Inc.
DS52099A-page 23
MCP19035 300 kHz Synchronous Buck Controller Evaluation Board User’s Guide
A.8
BOARD – BOTTOM COPPER AND PADS
DS52099A-page 24
2012 Microchip Technology Inc.
Schematic and Layouts
A.9
BOARD – BOTTOM COPPER, SILK AND PADS
2012 Microchip Technology Inc.
DS52099A-page 25
MCP19035 300 kHz Synchronous Buck Controller Evaluation Board User’s Guide
NOTES:
DS52099A-page 26
2012 Microchip Technology Inc.
MCP19035 300 KHZ SYNCHRONOUS
BUCK CONTROLLER EVALUATION
BOARD USER’S GUIDE
Appendix B. Bill of Materials
TABLE B-1:
Qty
BILL OF MATERIALS (BOM)
Reference
Description
Manufacturer
Part Number
4
BUMP
Bumpon Hemisphere .44X.20 White
3M
SJ-5003 (WHITE)
2
C1, C3
Cap. Cer. 22 µF 25V 10% X7R 1210
Murata Electronics®
GRM32ER71E226KE15L
1
C2
Cap. Cer. 10 µF 25V 10% X7R 121
TDK Corporation
C3225X7R1E106K
1
C4
Cap. Cer. 6800 PF 50V 5% NP0 0603
KEMET®
C0603C682J5GACTU
1
C5
Cap. Cer. 0.33 µF 16V 10% X7R 0603
Murata Electronics
GRM188R71C334KA01D
3
C6, C7, C8
Cap. Cer. 100 µF 6.3V 20% X5R 1210
TDK Corporation
C3225X5R0J107M
2
C9, C11
Cap. Cer. 1 µF 35V 10% X7R 0805
TDK Corporation
CGA4J3X7R1V105K
1
C10
Cap. Cer. 68 PF 100V 5% NP0 0603
KEMET
C0603C680J1GACTU
1
C12
Cap. Cer. 4.7 µF 25V X5R 0805
TDK Corporation
C2012X5R1E475K
1
C13
Cap. Cer. 820 PF 50V 5% NP0 0603
KEMET
C0603C821J5GACTU
®
1
D1
Diode Schottky 0.5A 30V SOD 323
Diodes Incorporated
B0530WS-7-F
2
J1, J2
Terminal Block 5.08 MM vert. two pos.
On-Shore
Technology, Inc.
ED120/2DS
1
L1
Inductor Power 1.5µH 19.5A SMD
Wurth® Elektronik
Group
7443320150
PCB
Printed Circuit Board - MCP19035 300 kHz —
Synchronous Buck Controller Evaluation
Board
104-00434
1
Q1
High Performance MOSFET Transistor
Microchip
Technology Inc.
MCP87050-U/MF
1
Q2
High Performance MOSFET Transistor
Microchip
Technology Inc.
MCP87022-U/MF
1
Q3
MOSFET N-Ch. 60V 115 MA SOT-23-3
Diodes Incorporated
2N7002-7-F
3
R1, R8, R9
Res. 5.1kOhm 1/10W 1% 0603 SMD
Panasonic® - ECG
ERJ-3EKF5101V
2
R2, R7
Res. 100kOhm 1/10W 1% 0603 SMD
Panasonic - ECG
ERJ-3EKF1003V
1
R3
Res. 0 Ohm 1/10W 0603 SMD
Panasonic - ECG
ERJ-3GEY0R00V
1
R4
Res. 100 Ohm 1/10W 1% 0603 SMD
Panasonic - ECG
ERJ-3EKF1000V
1
R5
Res. 7.50kOHMhm 1/10W 1% 0603 SMD
Panasonic - ECG
ERJ-3EKF7501V
1
R6
Res. 3.3 Ohm 1/10W 1% 0603
Panasonic - ECG
ERJ-3RQF3R3V
1
R10
Res. 49.9 Ohm .25W 1% 0603 SMD
Vishay/Dale
CRCW060349R9FKEAHP
1
R11
Res. 20k Ohm 1/10W 1% 0603 SMD
Panasonic - ECG
ERJ-3EKF2002V
2
R12, R14
Res. 10k Ohm 1/10W 1% 0603 SMD
Panasonic - ECG
ERJ-3EKF1002V
1
R13
Res. 750 Ohm 1/10W 1% 0603 SMD
Vishay/Dale
CRCW0603750RFKEA
19
TP1 – TP19 Test Point PC Multi Purpose Black
Keystone
Electronics Corp.
5011
1
U1
Microchip
Technology Inc.
MCP19035-AAABE/MF
Note 1:
High Speed Synchronous Buck Controller
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.
2012 Microchip Technology Inc.
DS52099A-page 27
MCP19035 300 kHz Synchronous Buck Controller Evaluation Board User’s Guide
NOTES:
DS52099A-page 28
2012 Microchip Technology Inc.
MCP19035 300 KHZ SYNCHRONOUS
BUCK CONTROLLER EVALUATION
BOARD USER’S GUIDE
Appendix C. Typical Performance Data, Curves and Waveforms
C.1
INTRODUCTION
This chapter shows some of the typical performace parameters and curves of the
MCP19035 300 kHz Synchronous Buck Controller Evaluation Board.
TABLE C-1:
CONVERTER PARAMETERS
Parameter
Value
Input Voltage Range (V)
Comments
8 - 14
Output Voltage (V)
1.8
Maximum Output Current (A)
15
±2.5% tolerance
Steady State output current
Output Voltage Ripple (mV)
<30
VIN = 12V, IOUT = 15A
Input Voltage Ripple (mV)
<300
VIN = 12V, IOUT = 15A
Output Voltage Overshoot during Step
Load (mV)
<100
Step Load 0A to 5A
Switching Frequency (kHz)
100
250 – 350
VIN = 8V
90
Efficiency (%)
Typical 300 kHz
VIN = 14V
80
VIN = 12V
70
60
50
40
0
FIGURE C-1:
2012 Microchip Technology Inc.
5000
10000
IOUT (mA)
15000
Efficiency.
DS52099A-page 29
VOUT (V)
Typical Performance Data, Curves and Waveforms
1.8
1.799
1.798
1.797
1.796
1.795
1.794
1.793
1.792
1.791
1.79
VOUT
0
FIGURE C-2:
FIGURE C-3:
5000
10000
IOUT (mA)
15000
Load Regulation (VIN = 12V).
Output Voltage Ripple/Noise (VIN = 12V, IOUT = 10A, BW = 20 MHz).
2012 Microchip Technology Inc.
DS52099A-page 30
Typical Performance Data, Curves and Waveforms
FIGURE C-4:
Input Voltage Ripple/Noise (VIN = 12V, IOUT = 10A, BW = 20 MHz).
FIGURE C-5:
BW = 300 MHz).
SW (TP11), LDRV (TP10) and HDRV (TP9) signals (VIN = 12V, IOUT = 10A,
2012 Microchip Technology Inc.
DS52099A-page 31
Typical Performance Data, Curves and Waveforms
FIGURE C-6:
LDRV (TP10) and HDRV (TP9) signals (VIN = 12V, IOUT = 10A, BW = 300 MHz).
FIGURE C-7:
Dead Times 1 (VIN = 12V, IOUT = 1A, BW = 300 MHz).
2012 Microchip Technology Inc.
DS52099A-page 32
Typical Performance Data, Curves and Waveforms
FIGURE C-8:
Dead Times 2 (VIN = 12V, IOUT = 1A, BW = 300 MHz).
FIGURE C-9:
The Body Diode Conduction Time (VIN = 12V, IOUT = 10A, BW = 300 MHz).
2012 Microchip Technology Inc.
DS52099A-page 33
Typical Performance Data, Curves and Waveforms
FIGURE C-10:
Step Load 1 (VIN = 12V).
FIGURE C-11:
Step Load 2 (VIN = 12V).
2012 Microchip Technology Inc.
DS52099A-page 34
Typical Performance Data, Curves and Waveforms
FIGURE C-12:
Power Good Signal (PGOOD).
FIGURE C-13:
Soft Start.
2012 Microchip Technology Inc.
DS52099A-page 35
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DS52099A-page 36
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10/26/12
2012 Microchip Technology Inc.