DESCRIPTION
The LTC®3576/LTC3576-1 are highly integrated power management and battery charger ICs for Li-Ion/Polymer battery applications. They each include a high efficiency, bidirectional switching PowerPath™ manager with automatic load prioritization, a battery charger, an ideal diode, a controller for an external high voltage switching regulator and three general purpose step-down switching regulators with I2C adjustable output voltages. The internal switching regulators automatically limit input current for USB compatibility and can also generate 5V at 500mA for USB on-the-go applications when powered from the battery.

FEATURES
■ Bidirectional Switching Regulator with
   BatTrack™ Adaptive Output Control Provides Efficient
   Charging and a 5V Output for USB On-The-Go
■ Bat-Track Control of External High Voltage
   StepDown Switching Regulator
■ Overvoltage Protection Guards Against Damage
■ “Instant-On” Operation with Discharged Battery
■ Triple Step-Down Switching Regulators with I2C
   Adjustable Outputs (1A/400mA/400mA IOUT)
■ 180mΩ Internal Ideal Diode + External Ideal Diode
   Controller Powers the Load in Battery Mode
■ Li-Ion/Polymer Battery Charger (1.5A Max ICHG)
■ Battery Float Voltage: 4.2V (LTC3576), 4.1V (LTC3576-1)
■ Compact (4mm × 6mm × 0.75mm) 38-pin QFN Package

APPLICATIONS
■ HDD-Based Media Players
■ GPS, PDAs, Digital Cameras, Smart Phones
■ Automotive Compatible Portable Electronics