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Summary of Contents for Microchip Technology MCP16251
- Page 1 MCP16251 One-Cell Boost Converter with External UVLO Circuit Reference Design 2017 Microchip Technology Inc. DS50002561A Arrow.com. Downloaded from...
- Page 2 GestIC is a registered trademark of Microchip Technology devices, Serial EEPROMs, microperipherals, nonvolatile memory and Germany II GmbH & Co. KG, a subsidiary of Microchip Technology analog products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001:2000 certified.
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Page 3: Table Of Contents
1.1 Introduction....................11 1.2 MCP16251 Device Short Overview ............... 11 1.2.1 MCP16251 Device Features ..............12 1.3 What is the MCP16251 One-Cell Boost Converter with External UVLO Circuit? ................13 1.4 What Does the MCP16251 One-Cell Boost Converter with External UVLO Circuit Kit Contain? ............13 Chapter 2. - Page 4 MCP16251 One-Cell Boost Converter with External UVLO Circuit NOTES: 2017 Microchip Technology Inc. DS50002561A-page 4 Arrow.com. Arrow.com. Arrow.com. Arrow.com. Downloaded from Downloaded from Downloaded from Downloaded from...
- Page 5 For information regarding the exclusive, limited warranties applicable to Microchip products, please see Microchip’s standard terms and conditions of sale, which are printed on our sales documentation and available at www.microchip.com. Signed for and on behalf of Microchip Technology Inc. at Chandler, Arizona, USA. 2017 Microchip Technology Inc.
- Page 6 MCP16251 One-Cell Boost Converter with External UVLO Circuit NOTES: 2017 Microchip Technology Inc. DS50002561A-page 6 Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from...
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Page 7: Preface
Customer Support • Document Revision History DOCUMENT LAYOUT This document describes how to use the MCP16251 One-Cell Boost Converter with External UVLO Circuit as an evaluation tool to test the external undervoltage lockout circuit. The manual layout is as follows: •... -
Page 8: Conventions Used In This Guide
MCP16251 One-Cell Boost Converter with External UVLO Circuit CONVENTIONS USED IN THIS GUIDE This manual uses the following documentation conventions: DOCUMENTATION CONVENTIONS Description Represents Examples Arial font: ® Italic characters Referenced books MPLAB IDE User’s Guide Emphasized text ...is the only compiler... -
Page 9: Recommended Reading
Preface RECOMMENDED READING This reference design describes how to use the MCP16251 One-Cell Boost Converter with External UVLO Circuit. Another useful document is listed below. The following Microchip document is available and recommended as a supplemental reference resource. • MCP16251/2 Data Sheet – “Low Quiescent Current, PFM/PWM Synchronous Boost Regulator with True Output Disconnect or Input/Output Bypass Option”... - Page 10 MCP16251 One-Cell Boost Converter with External UVLO Circuit NOTES: 2017 Microchip Technology Inc. DS50002561A-page 10 Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from...
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Page 11: Chapter 1. Product Overview
MCP16251 ONE-CELL BOOST CONVERTER WITH EXTERNAL UVLO CIRCUIT Chapter 1. Product Overview INTRODUCTION This chapter provides an overview of the MCP16251 One-Cell Boost Converter with External UVLO Circuit and covers the following topics: • MCP16251 Device Short Overview • MCP16251 Device Features •... -
Page 12: Mcp16251 Device Features
0.5V if its voltage is strictly monitored. Because the MCP16251 can operate from an input voltage as low as 0.35V once it has started, for applications powered from alkaline batteries, an Undervoltage Lockout (UVLO) circuit is recommended. -
Page 13: What Is The Mcp16251 One-Cell Boost Converter With External Uvlo Circuit
WHAT IS THE MCP16251 ONE-CELL BOOST CONVERTER WITH EXTERNAL UVLO CIRCUIT? The MCP16251 One-Cell Boost Converter with External UVLO Circuit is a simple, low quiescent current, one-cell Boost Converter with an external UVLO circuit. The converter will not (re)start if the battery voltage is lower than 1.1V and will stop working if the battery voltage drops below 0.8V. - Page 14 MCP16251 One-Cell Boost Converter with External UVLO Circuit NOTES: 2017 Microchip Technology Inc. DS50002561A-page 14 Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from...
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Page 15: Chapter 2. Installation And Operation
MCP16251 One-Cell Boost Converter with External UVLO Circuit Features The MCP16251 One-Cell Boost Converter with External UVLO Circuit is developed to provide a solution for applications that require fixed start-up/shutdown thresholds. The board features a discrete UVLO circuit implemented with bipolar junction transistors... -
Page 16: Short Battery Considerations Overview
MCP16251 One-Cell Boost Converter with External UVLO Circuit 2.1.2 Short Battery Considerations Overview Although the marking on an alkaline battery will show 1.5V, the Open-Circuit Voltage (OCV) can be as high as 1.7V. The Closed Circuit Voltage (CCV), or operating voltage, will always be smaller than the OCV because of non-idealities in the cell (i.e., the internal resistance). -
Page 17: Getting Started
J1 is open if there is also a battery in the AA battery holder. Also, the minimum input voltage for which the MCP16251 Boost Converter will start switching is 1.1V and the maximum input voltage must not exceed 3.3V (V <... -
Page 18: Mcp16251 One-Cell Boost Converter With External Uvlo Circuit Operation
For connecting the load and measuring the output voltage. Connected to the battery’s negative terminal. • Test Points For measuring the enable signal. It is connected to the MCP16251 device’s EN pin. Connected to the switching node. 2.2.2 MCP16251 One-Cell Boost Converter with External UVLO Circuit Operation MCP16251 device’s enable pin is a logic-level input used to enable or... - Page 19 0.8V, the Base-Emitter Voltage of transistor Q1 becomes too small, turning the transistor off. This pulls EN to Ground through the pull-down resistor R5, thus shutting down the MCP16251. Both thresholds are programmable and new values can be easily calculated using Equations 2-1 and 2-2.
- Page 20 MCP16251 One-Cell Boost Converter with External UVLO Circuit FIGURE 2-5: Board Hysteresis Profile; X-Axis is V and Y-Axis is EN. The UVLO circuit consumes approximately 0.2 µA before start-up and 1.6-2 µA when the Boost Converter is switching. Figure 2-6 shows the UVLO circuit current consumption vs.
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Page 21: Appendix A. Schematic And Layouts
MCP16251 ONE-CELL BOOST CONVERTER WITH EXTERNAL UVLO CIRCUIT Appendix A. Schematic and Layouts INTRODUCTION This appendix contains the following schematics and layouts for the MCP16251 One-Cell Boost Converter with External UVLO Circuit: • Board – Schematic • Board – Top Silk and Pads •... - Page 22 MCP16251 One-Cell Boost Converter with External UVLO Circuit 2017 Microchip Technology Inc. DS50002561A-page 22 Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Downloaded from Downloaded from...
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Page 23: Board - Top Silk And Pads
Schematic and Layouts BOARD – TOP SILK AND PADS BOARD – TOP COPPER 2017 Microchip Technology Inc. DS50002561A-page 23 Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. -
Page 24: Board - Bottom Silk And Pads
MCP16251 One-Cell Boost Converter with External UVLO Circuit BOARD – BOTTOM SILK AND PADS BOARD – BOTTOM COPPER 2017 Microchip Technology Inc. DS50002561A-page 24 Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. -
Page 25: Board - Top 3D View
Schematic and Layouts BOARD – TOP 3D VIEW BOARD – BOTTOM 3D VIEW 2017 Microchip Technology Inc. DS50002561A-page 25 Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. - Page 26 MCP16251 One-Cell Boost Converter with External UVLO Circuit NOTES: 2017 Microchip Technology Inc. DS50002561A-page 26 Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com.
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Page 27: Appendix B. Bill Of Materials (Bom)
J4, J5 Mechanical Hardware Jumper, 2.54 mm, 1x2, TE Connectivity, Ltd. 881545-2 Handle Gold Printed Circuit Board - MCP16251 One-Cell Microchip Technology Inc. 04-10604 Boost Converter with External UVLO Circuit Transistor, BJT, PNP, 60V, 800 mA, 350 mW, Fairchild Semiconductor... -
Page 28: Worldwide Sales And Service
Sweden - Stockholm Tel: 408-436-4270 Tel: 46-8-5090-4654 Fax: 86-29-8833-7256 Fax: 66-2-694-1350 Canada - Toronto UK - Wokingham Tel: 905-695-1980 Tel: 44-118-921-5800 Fax: 905-695-2078 Fax: 44-118-921-5820 2017 Microchip Technology Inc. DS50002561A-page 28 11/07/16 Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com.
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