Analog Devices LTC3567

Description

The LTC®3567 is a highly integrated power management and battery charger IC for Li-Ion/Polymer battery applications. It includes a high effi ciency current limited switching PowerPath manager with automatic load prioritization, a battery charger, an ideal diode, and a high effi ciencysynchronous buck-boost switching regulator. Designed specifi cally for USB applications, the LTC3567’s switching power manager automatically limits input current to a maximum of either 100mA or 500mA for USB or 1A for adapter-powered applications.The LTC3567’s switching input stage transmits nearly all of the 2.5W available from the USB port to the system load with minimal power wasted as heat. This feature allows the LTC3567 to provide more power to the application and eas es thermal budgeting constraints in small spaces.The synchronous buck-boost DC/DC can provide up to 1A output current.The LTC3567 is available in a low profi le 24-pin (4mm ×4mm × 0.75mm) QFN surface mount package.

Features

Power Manager

• High Efficiency Switching PowerPath Controller with Bat-Track Adaptive Output Control

• Programmable USB or Wall Current Limit (100mA/500mA/1A)

• Full Featured Li-Ion/Polymer Battery Charger

• “Instant-On” Operation with a Discharged Battery

• 1.5A Maximum Charge Current

• Internal 180mΩ Ideal Diode Plus External Ideal Diode Controller Powers Load in Battery Mode

• Low No-Load IQ When Powered from BAT (<30μA)

• 1A Buck-Boost DC/DC

• High Efficiency (1A IOUT )

• 2.25MHz Constant Frequency Operation

• Low No-Load Quiescent Current (~13μA)

• Zero Shutdown Current

• I2C Control of All Functions

Typical applications

• PDA
• HDD Based MP3 Players
• Other USB Based Handheld Products
• PMP
• GPS

More information

• Datasheet
• IC product information