ARD00386 Microchip Technology, ARD00386 Datasheet - Page 13

• Manufacturer Part Number: ARD00386
• Description: Power Management Modules MCP1640 12V 50mA Boost Converter
• Manufacturer: Microchip Technology

Specifications of ARD00386

• Product: DC-DC Converters / Regulators
• Input Voltage Max: 5 V
• Switching Frequency: 500 kHz
• Output Voltage: 12 V
• Output Current: 50 mA
• Input Voltage Min: 2 V

2.1
© 2011 Microchip Technology Inc.
INTRODUCTION
Chapter 2. Installation and Operation
The MCP1640 12V/50 mA Two Cells Input Boost Converter Reference Design is
developed to demonstrate how the MCP1640 device can operate as a high output
voltage DC-DC converter when powered from two batteries. This reference design
allows boosting from the input range of 2.0V-5V to an output higher than 5.5V of the
typical MCP1640 application. High-voltage outputs, such as 9V, 12V or 24V, can be
generated from just two alkaline cells.
For this reference design, the output voltage is set at 12V. Typically, a minimum of a
50 mA load can be supported from a 2.0V input. The board can deliver more output cur-
rent (up to 70 mA) if it is powered with 3.0V. A small 3x3x1 mm inductor offers a good
efficiency of up to 75%. Good converter stability is obtained with the B option of
MCP1640 (PWM Mode Only and True Output Disconnect options).
2.1.1
The MCP1640 Input Boost Converter has the following features:
• Input Voltage: Two Alkaline or Lithium Cells, 2.0-3.0V Typical
• Output Capability:
• No Load Input Current: 0.2 mA @ 3.0V Input
• Efficiency: up to 75%
• PWM Operation at 500 kHz
- Supports extended input range of 2.0V-5.0V
- Dependent on the input voltage
- 12V/50 mA typical @ 2.0V input
- 12V/70 mA @ 3.3V input
Board Features
MCP1640 12V/50 mA TWO CELLS
INPUT BOOST CONVERTER
REFERENCE DESIGN
DS51999A-page 13