DESCRIPTION
The LTC®3429/LTC3429B are high efficiency synchronous, fixed frequency, step-up DC/DC converters with true output load disconnect, inrush current limiting and softstart in a low profile 6-lead ThinSOTTM package. These devices are capable of supplying 100mA from a single AA cell input or 250mA from a 2-cell AA with a 3.3V output.

FEATURES
■ Up to 96% Efficiency
■ True Output Load Disconnect
■ Inrush Current Limiting and Internal Soft-Start
■ Low Voltage Start-Up: 0.85V
■ Automatic Burst Mode® Operation with IQ ~ 20µA
■ Continuous Switching at Light Loads (LTC3429B)
■ Internal Synchronous Rectifier
■ Current Mode Control with Internal Compensation
■ Short-Circuit Protection
■ 500kHz Fixed Frequency Switching
■ Input Range: 0.5V to 4.4V
■ Output Range: 2.5V to 4.3V (Up to 5V with Schottky)
■ Shutdown Current: <1µA
■ Antiringing Control Minimizes EMI
■ Tiny External Components
■ Low Profile (1mm) SOT-23 Package

APPLICATIONS
■ MP3 Players
■ Digital Cameras
■ LCD Bias Supplies
■ Handheld Instruments
■ Wireless Handsets
■ GPS Receivers