LTC3400B Datasheet

• Up to 92% Efficiency
• Generates 3.3V at 100mA from a Single AA Cell
• Low Start-Up Voltage: 0.85V
• 1.2MHz Fixed Frequency Switching
• Internal Synchronous Rectifier
• 2.5V to 5V Output Range
• Continuous Switching at Light Loads
• Logic Controlled Shutdown (<1µA)
• Antiringing Control Minimizes EMI
• Tiny External Components
• Low Profile (1mm) SOT-23 Package

• Pagers
• MP3 Players
• Digital Cameras
• LCD Bias Supplies
• Handheld Instruments
• Wireless Handsets
• GPS Receivers

The LTC3400B is synchronous, fixed frequency, step-up DC/DC converters delivering high efficiency in a 6-lead ThinSOT^™ package. Capable of supplying 3.3V at 100mA from a single AA cell input, the devices contain an internal NMOS switch and PMOS synchronous rectifier.

A switching frequency of 1.2MHz minimizes solution footprint by allowing the use of tiny, low profile inductors and ceramic capacitors. The current mode PWM design is internally compensated, reducing external parts count.The LTC3400B features continuous switching at light loads. Antiringing control circuitry reduces EMI concerns by damping the inductor in discontinuous mode, and the devices feature low shutdown current of under 1µA.

The LTC3400B is available in the low profile (1mm) SOT-23 package.