MCP1665 12V OUTPUT BOOST

REGULATOR EVALUATION BOARD

USER’S GUIDE

 2017 Microchip Technology Inc.

DS50002686A-page 11

Chapter 2. Installation and Operation

2.1

INTRODUCTION

MCP1665 is a non-synchronous, fixed-frequency step-up DC/DC converter that has

been developed for applications that require higher output voltage capabilities.

MCP1665 can regulate the output voltage up to 32V and can deliver up to 1A to the

load at 5V input and 12V output (see Figure 2-3).

At light loads, there are two ways the MCP1665 keeps its input current low. The first

one is SKIPPING pulses to keep the output ripple low (this happens when the MODE

PFM mode. This reduces the input current even further by completely stopping the

switching as long as the output voltage remains within the permitted range. It comes at

the cost of a higher output ripple, in the range of hundreds of millivolts.

Another important feature is that the device integrates the compensation and protection

circuitry, such that the final solution lowers total system cost, eases implementation and

requires a minimum number of additional components and board area.

2.1.1

MCP1665 12V Output Boost Regulator Evaluation Board

Features

The MCP1665 12V Output Boost Regulator Evaluation Board has the following

features:

• Typical 12V Output when supplied from a low-input voltage source

• Output Current: max 1 A @ 12V Output with 5V Input

• Enabled state is selectable by using EN jumper

• Light-load power saving method is selectable by toggling the MODE switch

• Undervoltage Lockout (UVLO)

- UVLO Start: 2.9V

- UVLO Stop: 2.7V

• PWM/PFM Operation

• PWM Switching Frequency: 500 kHz

• Peak Input Current Limit of 3.6A (typical)

• Internal Compensation, so no compensation network is needed on the board

• Soft Start

• Protection in case of feedback pin shorted to GND

• Overtemperature Protection (if the die temperature exceeds +150°C, with 15°C

hysteresis)