Note the following details of the code protection feature on Microchip devices:
YSTEM
CERTIFIED BY DNV
== ISO/TS 16949==
•Microchip products meet the specification contained in their particular Microchip Data Sheet.
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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.
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All other trademarks mentioned herein are property of their
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DS50002364A-page 2 2015 Microchip Technology Inc.
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
are for its PIC
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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
Object of Declaration: MCP1663 9V/12V/24V Output Boost Regulator Evaluation Board
DS50002364A-page 6 2015 Microchip Technology Inc.
MCP1663 9V/12V/24V OUTPUT
BOOST REGULATOR EVALUATION
BOARD USER’S GUIDE
Preface
NOTICE TO CUSTOMERS
All documentation becomes dated, and this manual is no exception. Microchip tools and
documentation are constantly evolving to meet customer needs, so some actual dialogs
and/or tool descriptions may differ from those in this document. Please refer to our web site
(www.microchip.com) to obtain the latest documentation available.
Documents are identified with a “DS” number. This number is located on the bottom of each
page, in front of the p age number. The numbering convention for the DS number is
“DSXXXXXXXA”, where “XXXXXXX” is the document number and “A” is the revision level of
the document.
For the most up-to-date information on development tools, see the MPLAB
Select the Help menu, and then Topics to open a list of available online help files.
®
IDE online help.
INTRODUCTION
This chapter contains general information that will be useful to know before using the
MCP1663 9V/12V/24V Output Boost Regulator 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 MCP1663 9V/12V/24V Output Boost
Regulator Evaluation Board as a development tool. The manual layout is as follows:
• Chapter 1. “Product Overview” – Important information about the MCP1663
Choice of mutually exclusive
arguments; an OR selection
Represents code supplied by
user
“Save project before build”
4‘b0010, 2‘hF1
any valid filename
[options]
errorlevel {0|1}
var_name...]
void main (void)
{ ...
}
®
IDE User’s Guide
DS50002364A-page 8 2015 Microchip Technology Inc.
RECOMMENDED READING
This user's guide describes how to use MCP1663 9V/12V/24V Output Boost Regulator
Evaluation Board. Another useful document is listed below. The following Microchip
document is available and recommended as a supplemental reference resource.
• MCP1663 Data Sheet - “High-Voltage Integrated Switch PWM Boost
Regulator with UVLO” (DS20005406)
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:
DS50002364A-page 10 2015 Microchip Technology Inc.
BOOST REGULATOR EVALUATION
Chapter 1. Product Overview
1.1INTRODUCTION
This chapter provides an overview of the MCP1663 9V/12V/24V Output Boost
Regulator Evaluation Board and covers the following topics:
• MCP1663 Short Overview
• What is the MCP1663 9V/12V/24V Output Boost Regulator Evaluation Board?
• What the MCP1663 9V/12V/24V Output Boost Regulator Evaluation Board
Contains
1.2MCP1663 DEVICE OVERVIEW
The MCP1663 is a compact, high-efficiency, fixed-frequency, non-synchronous step-up
DC/DC converter which integrates a 36V, 400 m switch. This product provides a
space-efficient high voltage step-up, easy-to-use power supply solution. The MCP1663
was developed for applications powered by two-cell or three-cell alkaline, Energizer
Lithium Primary, Ni-Cd, Ni-MH batteries, or Li-Ion or Li-Polymer batteries.
The MCP1663 operates in Pulse-Width Modulation (PWM), at a fixed 500 kHz
switching frequency. The device features an under-voltage lockout (UVLO) which
prevents fault operation below 1.85V (UVLO
discharged batteries. The MCP1663 starts its normal operation at 2.3V input voltage
(UVLO
For standby applications, MCP1663 can be put in Shutdown by pulling the EN pin to
GND. The device will stop switching and will consume a few µA of input current
(including feedback divider current; the device consumes 300 nA typical). In the Boost
configuration, the input voltage will be bypassed to output through the inductor and
Schottky diode.
MCP1663 also provides over-voltage protection(OVP) in the event of:
• Short-circuit of the feedback pin to GND
• Disconnected feedback divider
In these conditions, the OVP function will stop the internal driver and prevent damage
to the device. This feature is disabled during the start-up sequence and Thermal
Shutdown state.
The goal of the MCP1663 9V/12V/24V Output Boost Regulator Evaluation Board is to
demonstrate the higher output voltage and output current capabilities of the MCP1663
Boost Converter.
) and the operating input voltage ranges from 2.4V to 5.5V.
FIGURE 1-1:Typical MCP1663 Boost Converter Two Alkaline Cells Input.
1.2.1HIGH INPUT VOLTAGE CONFIGURATION
The MCP1663 9V/12V/24V Output Boost Regulator Evaluation Board comes with two
additional configurations that can be used to extend and overcome the typical low V
voltage range, providing significantly more flexibility for applications powered from a
higher input. The MCP1663 high-input voltage boost converter (the bottom circuit on
the evaluation board) comes with two different solutions that can be used to extend the
application's input voltage range beyond its typical values. For this circuit, V
represents the voltage applied between the VIN and GND test points on the board and
V
represents the voltage that will be present on the MCP1663 input pin.
DD
• The first option used for driving the MCP1663’s low input (V
) voltage internal
DD
circuitry is to use a linear dropout regulator (LDO) to step-down the application
supply voltage (V
• The second solution to limit the V
) to 5V.
IN
voltage is to use a Zener diode regulator.
IN
The MCP1663 low input quiescent current keeps the LDO and the Zener diode circuitry
power losses at a low level.
IN
IN
DS50002364A-page 12 2015 Microchip Technology Inc.
Product Overview
V
IN
EN
GND
V
FB
SW
V
OUT
24V, 350 - 500 mA
C
IN
10 µF
169 k
9.1 k
R
T
R
B
GND
+
-
V
OUT
GND
+
-
MCP1663
MBRA140T3G
V
IN
9V - 16V
V
IN
D
C
OUT
2 x10 µF
L
10
µH
ZENER
LDO
BIAS
BIAS
V
IN
9V - 16V
BIAS OPTION SELECT
FIGURE 1-2:MCP1663 24V Output Boost from HV Input (9V-16V).
1.3WHAT IS THE MCP1663 9V/12V/24V OUTPUT BOOST REGULATOR
EVALUATION BOARD?
The MCP1663 9V/12V/24V Output Boost Regulator Evaluation Board is used to
evaluate and demonstrate Microchip Technology’s MCP1663 Switching Boost
Regulator. This board demonstrates the MCP1663 capabilities in two different
applications:
• 9V or 12V selectable output Boost Converter application supplied from an
external voltage source (V
typical step-up configuration is meant to highlight the MCP1663 basic boost
operation.
• 24V Output Boost converter application supplied from high voltage input rail (e.g.
9V - 16V). This application provides solutions for the particular situation in which
the required input voltage is outside the typical operating range (e.g. V
boost to 24V
Output). J1 jumper is used to choose between stepping down the VIN
voltage using the LDO or the Zener diode circuitry.
The board can be used to evaluate the SOT-23-5 lead package. The MCP1663
DS50002364A-page 14 2015 Microchip Technology Inc.
Chapter 2. Installation and Operation
2.1INTRODUCTION
MCP1663 is a non-synchronous, fixed-frequency step-up DC/DC converter which has
been developed for applications that require higher output voltage capabilities.
MCP1663 can regulate the output voltage up to 32V and can deliver up to 250 mA load
at 3.3V input and 12V output (see Figure 2-3). At light loads, MCP1663 skips pulses to
keep the output ripple low. The regulated output voltage (V
the input voltage (V
Another important feature is that the device integrates the compensation and protection
circuitry, such that the final solution lowers total system cost, eases implementation and
requires a minimum number of additional components and board area.
2.1.1MCP1663 9V/12V/24V Output Boost Regulat or Evaluation Board
The MCP1663 9V/12V/24V Output Boost Regulator Evaluation Board has the
following features:
• MCP1663 device can be evaluated in two separate applications:
Typical 9V/12V Output supplied from low-input voltage source
DS50002364A-page 16 2015 Microchip Technology Inc.
2.2GETTING STARTED
The MCP1663 9V/12V/24V Output Boost Regulator Evaluation Board is fully
assembled and tested to evaluate and demonstrate the MCP1663 product. This board
requires the use of external laboratory supplies and load.
2.2.1Power Input and Output Connection
2.2.1.1POWERING THE MCP1663 9V/12V/24V OUTPUT BOOST REGULATOR
EVALUATION BOARD
The MCP1663 9V/12V/24V Output Boost Regulator Evaluation Board was designed
to be used to evaluate the MCP1663 device. The package selected is SOT-23.
Soldered test points are available for input voltage connections.
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 converter
will vary with input and output voltages; refer to Figure 2-3 or the MCP1663 data sheet
for more information on the maximum output current.
2.2.1.2BOARD POWER-UP PROCEDURE
TOP CIRCUIT
1. Connect the input supply as shown in Figure 2-2. The input voltage should not
be higher than 5.5V.
2. Connect system load to V
input and output voltage. Connect the (+) side of the load to V
negative (-) load to ground (GND).
3. The “VOUT SELECT” switch can be used to modify the output voltage between
two values:
- 9V, when the switch is in OFF position
- 12V, when the switch is in ON position
BOTTOM CIRCUIT
1. Connect the input supply as shown in Figure 2-2.
2. The MCP1663 can be used in the extended input voltage range 9V - 16V.
3. Connect system load to V
input and output voltage. Typically, the MCP1663 can supply a 24V output with
500 mA from a 12V input source at room temperature. Connect the (+) side of
the load to V
4. There are two distinct methods that can be used to extend the input voltage
range:
- Using an LDO to provide the necessary low voltage (V
in “LDO” position)
- Using a Zener diode (jumper on J1 in “Zener” position)
DS50002364A-page 18 2015 Microchip Technology Inc.
2.2.1.3ADJUSTABLE V
The top circuit comes with the output value set to 9V and 12V (V
SETTING
OUT
selective using a
OUT
switch). If a different output is desired, set the switch in the OFF state (button down)
and recalculate the resistor divider (RT1 and RB1) using Equation 2-1.
The Bottom circuit comes with V
set to 24V. As in the previous case, the same
OUT
equation can be used to calculate RT and RB and set another output voltage. Note that
V
IN
EQUATION 2-1:
must be lower than V
OUT
.
Installation and Operation
0
100
200
300
400
500
600
700
800
2.32.73.13.53.94.34.75.15.5
I
OUT
(mA)
VIN(V)
V
OUT
= 12V
V
OUT
= 9.0V
TA= 25°C
For output voltages higher than 15V, the inductor value should be increased. See
Ta bl e 2 - 1 for more information.
TABLE 2-1:RECOMMENDED RESISTOR DIVIDER AND INDUCTOR VALUES
V
OUT
6.0V4.7 µH1050 kΩ270 kΩ
9.0V4.7 µH1000 kΩ160 kΩ
12V4.7 µH1050 kΩ120 kΩ
24V10 µH1050 kΩ56 kΩ
32V10 µH1100 kΩ43 kΩ
Inductor ValueRTRB
2.3TEST RESULTS FOR TYPICAL APPLICATION USING MCP1663
2.3.1Test Results for MCP1663 - TOP Circuit
This chapter provides specific operation waveforms and graphs. Refer to the MCP1663
Data Sheet (DS20005406) for more information.
FIGURE 2-3:MCP1663 Boost - 9V and 12.0 V
Maximum 5% Output Drop.
DS50002364A-page 20 2015 Microchip Technology Inc.
Installation and Operation
V
OUT
50 mV/div, AC Coupled
20 MHz BW
I
L
500 mA/div
10 V/div
I
OUT
= 500 mA
2µs/div
VIN 12V
V
SW
0
200
400
600
800
68101214
I
OUT
(mA)
VIN(V)
V
OUT
= 24V
TA= 25°C
Note: VDD = 4.5V
2.3.2Test Results for MCP1663 - BOTTOM Circuit
The second circuit was developed for applications where an input voltage higher than
the typical working range is needed. Refer to Figure 2-7 for the maximum output
current that can be obtained for different input voltages.
When considering a power solution for a design, the battery needs to be carefully
selected. Alkaline batteries are a commonly available option that delivers good
performance in a variety of applications. Energizer
alternative power solution that provide superior-performance high drains and allows
designers to utilize the full power range of the MCP1663 without sacrificing size or
runtime.
Energizer Ultimate Lithium batteries utilize a primary cell chemistry that contain higher
energy than alkaline batteries, and have much better high drain performance. Ultimate
Lithium batteries produce a high, flat voltage profile that enables them to provide a high
energy capacity even at high drains. Additionally, Ultimate Lithium batteries have a very
low internal resistance, allowing them to maintain a high voltage at very high loads.
.
OUT
®
Ultimate Lithium batteries are an
DS50002364A-page 22 2015 Microchip Technology Inc.
Appendix A. Schematic and Layouts
A.1INTRODUCTION
This appendix contains the following schematics and layouts for the MCP1663
9V/12V/24V Output Boost Regulator Evaluation Board: