Microchip Technology ARD00386 Data Sheet
MCP1640 12V/50 mA TWO CELLS
INPUT BOOST CONVERTER
REFERENCE DESIGN
© 2011 Microchip Technology Inc.
DS51999A-page 9
Chapter 1. Product Overview
1.1
INTRODUCTION
This chapter provides an overview of the MCP1640 12V/50 mA Two Cells Input Boost
Converter Reference Design and covers the following topics:
Converter Reference Design and covers the following topics:
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1.2
MCP1640 SHORT OVERVIEW
The MCP1640 device 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.
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/C device automatically selects the best operating mode for efficiency,
PWM (Pulse-Width Modulation) or PFM (Pulse Frequency Modulation). The
MCP1640B/D device is running in PWM mode only and is ideal for noise sensitive
applications. It has a low quiescent current (19 µA, PFM mode typical), a wide input
voltage range (0.35 to 5.5V) and a low start-up voltage (0.65V at 1 mA load current).
The MCP1640 device consumes less than 1 µA in Shutdown mode.
PWM (Pulse-Width Modulation) or PFM (Pulse Frequency Modulation). The
MCP1640B/D device is running in PWM mode only and is ideal for noise sensitive
applications. It has a low quiescent current (19 µA, PFM mode typical), a wide input
voltage range (0.35 to 5.5V) and a low start-up voltage (0.65V at 1 mA load current).
The MCP1640 device consumes less than 1 µA in Shutdown mode.
Microchip Technology Inc. provides the MCP1640 device in four variants, which help
engineers to meet different system requirements. The devices and their available
options are presented in
engineers to meet different system requirements. The devices and their available
options are presented in
.
TABLE 1-1:
PART NUMBER SELECTION
The MCP1640 is available in SOT23-6 and 8-LD DFN (2x3 mm) packages. For
additional information on the MCP1640 device, refer to the “MCP1640/B/C/D Data
Sheet” (DS22234).
additional information on the MCP1640 device, refer to the “MCP1640/B/C/D Data
Sheet” (DS22234).
Part Number
PWM/PFM
Mode
PWM
Mode
True Output
Disconnect
Shutdown
Option
Input to Output
Bypass
Shutdown
Option
MCP1640
X
—
X
—
MCP1640B
—
X
X
—
MCP1640C
X
—
—
X
MCP1640D
—
X
—
X