深圳市中立信电子科技有限公司

MAX8969EWL37+T

Step-Up Converter for Handheld Applications

开关稳压器 1A Boost Converter with Track mode

MAX8969EWL37+T General Description

The MAX8969 is a simple 1A step-up converter in a small

package that operates in any single-cell Li-ion application.

This IC provides protection features such as input undervoltage

lockout, short circuit, and overtemperature shutdown.

The IC transitions to skip mode seamlessly under lightload

conditions to improve efficiency. Under these conditions,

switching occurs only as needed, reducing switching

frequency and supply current to maintain high efficiency.

MAX8969EWL37+T Applications

● Cell Phones

● Smartphones

● Mobile Internet Devices

● GPS, PND

● eBooks

MAX8969EWL37+T Benefits and Features

● Flexible System Integration

• Up to 1A Output Current

• 2.5V to 5.5V Input Voltage Range

• 3.3V to 5.5V Output Voltage Options

● Integrated Protection Increases System Robustness

• Undervoltage Lockout (UVLO)

• Short-Circuit Protection

• Overtemperature Shutdown

● High Efficiency and Low Quiescent Current Extends Battery Life

• Over 90% Efficiency with Internal Synchronous Rectifier

• 60μA IQ in Automatic Track Mode

• 45μA IQ in Step-Up Mode

• 30μA IQ in Track Mode

• 1μA Shutdown Current

• Skip Mode Under Light Load Condition Improves Efficiency

• True Shutdown™ Prevents Current Flow from OUT_ to LX_

• Soft-Start Limits Inrush Current to 480mA

● Small Package and High Frequency Operation Reduce Board Space

• 9-Bump 1.25mm x 1.25mm WLP Package

• 3MHz PWM Switching Frequency

• Small External Components