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MCP1650/1/2/3 EVALUATION

BOARD USER’S GUIDE

 2004 Microchip Technology Inc.

DS51462A-page 5

Chapter 2. Installation and Operation

2.1

INTRODUCTION

The MCP1650 Boost Controller Evaluation Board is designed to demonstrate

Microchip’s family of high-frequency boost controllers. The product family consists of

four high-frequency, boost-converter devices having different combinations of features.

All devices in the family feature 750 kHz high-frequency, low quiescent current,

shutdown capability and the MSOP package. The MCP1650 8-pin MSOP is the base

device. The MCP1651 8-pin MSOP includes all of the features of the MCP1650, with

the addition of a low battery detect and low battery output (LBO) indicator. The

MCP1652 8-pin MSOP includes all of the features of the MCP1650, with the addition

of a power good (PG) indicator. The PG indicator is an open-drain output that is

high-impedance when the output voltage of the converter is within ±15% of its intended

regulation range. When the output of the regulator is not within the ±15% range, the PG

pin will sink up to 10 mA. The MCP1653 10-pin MSOP has all features; the LBO and

PG, along with the base features of the MCP1650.

2.2

FEATURES

The MCP1650 Boost Controller Evaluation Board has the following features:

• Evaluation of the MCP1651 in a boost application configured in the Bootstrap

mode. This application circuit will regulate the output to 5V while delivering 1A of

current as the input voltage varies from 2.8V to 4.8V.

• Evaluation of the MCP1653 in a boost application configured in the non-Bootstrap

mode. This application circuit will regulate the output voltage to 12V while

delivering 400 mA of output current as the input voltage varies from 3.0V to 3.6V.

2.3

GETTING STARTED

The MCP1650 Boost Controller Evaluation Board is fully assembled and tested for

evaluation and demonstration of the MCP1650 family of boost controllers. This board

requires the use of external lab supplies and loads. Both application circuits have a

fuse for input overcurrent protection. As with all boost converters, there is a path from

put, there is no means of protecting the inductor and diode, so an external fuse is

provided.

MCP1651R Application Circuit

1. Powering the MCP1651 bootstrap application circuit:

- Apply the input voltage to the surface-mount test points provided. The input

voltage source should be limited to the 2.8V to 4.8V range to regulate the

5V output. The input voltage must not exceed the +5.5V maximum rating of

the MCP165X. The source current necessary to regulate the output voltage

to +5V at 1A should be approximately 3A.

_1 test point

(TP1). Connect the negative, or return side, (-) of the input source to the

_1.