MCP1665 12V OUTPUT BOOST

REGULATOR EVALUATION BOARD

USER’S GUIDE

 2017 Microchip Technology Inc.

DS50002686A-page 9

Chapter 1. Product Overview

1.1

INTRODUCTION

This chapter provides an overview of the MCP1665 12V Output Boost Regulator

Evaluation Board and covers the following topics:

• MCP1665 Device Overview

• What is the MCP1665 12V Output Boost Regulator Evaluation Board?

• What DOES the MCP1665 12V Output Boost Regulator Evaluation Board Kit

Contain?

1.2

MCP1665 DEVICE OVERVIEW

The MCP1665 is a compact, high-efficiency, fixed-frequency, nonsynchronous step-up

DC/DC converter that integrates a 36V, 100 m

 NMOS switch. This product provides

a space-efficient high-voltage step-up, easy-to-use power supply solution. The

MCP1665 was developed for applications powered by Li-Ion or Li-Polymer batteries,

batteries.

The MCP1665 operates in Pulse-Width Modulation (PWM), at a fixed 500 kHz

switching frequency. The device features an undervoltage lockout (UVLO) which

discharged batteries. The MCP1665 starts its normal operation at 2.9V input voltage

For standby applications, MCP1665 can be set in Shutdown by pulling the EN pin to

GND. The device will stop switching and will consume tens of μA of input current

including the feedback divider (the chip itself consumes approx.1 μA). In the Boost

configuration, the input voltage will be bypassed to output through the inductor and the

Schottky diode.

MCP1665 also provides two protection features:

• An open-load protection (OLP) in the event of:

- Short-circuit of the feedback pin to GND

- Disconnected feedback divider

In these conditions, the OLP function stops the internal driver and prevents dam-

aging the device and load. This feature is disabled during start-up sequence and

Thermal Shutdown state.

• An overvoltage protection (OVP) in the event of feedback voltage increasing more

than 5% above its nominal value, meant to protect the device and the load against

excessive overshoots during load steps.

The goal of the MCP1665 12V Output Boost Regulator Evaluation Board is to

demonstrate the higher output voltage and output current capabilities of the MCP1665

Boost Converter.