DESCRIPTION
The LTC®3499/LTC3499B are synchronous, fixed frequency step-up DC/DC power converters with integrated reverse battery protection that protect and disconnect the devices and load when the battery polarity is reversed while delivering high efficiency in a small (3mm × 3mm) DFN package. True output disconnect eliminates inrush current and allows zero load current in shutdown.

FEATURES
■ Reverse-Battery Protection for DC/DC Converter
   and Load
■ High Efficiency: Up to 94%
■ Generates 5V at 175mA from a 1.8V Input
■ Operates from 1.8V to 5.5V Input Supply
■ 2V to 6V Adjustable Output Voltage
■ Inrush Current Controlled During Start-Up
■ Output Disconnnect in Shutdown
■ Low Noise 1.2MHz PWM Operation
■ Tiny External Components
■ Automatic Burst Mode® Operation (LTC3499)
■ Continuous Switching at Light Loads (LTC3499B)
■ Overvoltage Protection
■ 8-Lead (3mm × 3mm × 0.75mm) DFN
   and MSOP Packages

APPLICATIONS
n Medical Equipment
n Digital Cameras
n MP3 Players
n Handheld Instruments