DESCRIPTION
The LTC®3401 is a high efficiency, fixed frequency, step-up DC/DC converter that operates from an input voltage below 1V. The device includes a 0.16ΩN-channel MOSFET switch and a 0.18Ω P-channel synchronous rectifier. Switching frequencies up to 3MHz are programmed with an external timing resistor and the oscillator can be synchronized to an external clock. An external Schottky diode is optional but will slightly improve efficiency.

FEATURES
■ Synchronous Rectification: Up to 97% Efficiency
■ 1A Switch Current Rating
■ Fixed Frequency Operation Up to 3MHz
■ Wide Input Range: 0.5V to 5.5V (Operating)
■ Very Low Quiescent Current: 38μA (Burst Mode® Operation)
■ 2.6V to 5.5V Adjustable Output Voltage
■ 0.85V (Typ) Start-Up Voltage
■ No External Schottky Diode Required (VOUT < 4.3V)
■ Synchronizable Switching Frequency
■ Burst Mode Enable Control
■ Antiringing Control Reduces Switching Noise
■ PGOOD Output
■ OPTI-LOOP® Compensation
■ Very Low Shutdown Current: <1μA
■ Small 10-Pin MSOP Package

APPLICATIONS
■ Pagers
■ Handheld Instruments
■ Cordless Phones
■ Wireless Handsets
■ GPS Receivers
■ Battery Backup
■ CCFL Backlights