LTC3400-1 Datasheet

• Up to 92% Efficiency
• Generates 3.3V at 100mA from a Single AA Cell
• Low Start-Up Voltage: 0.85V
• V_OUT Connected to V_IN in Shutdown
• Internal Synchronous Rectifier
• 2.5V to 5V Output Range
• Automatic Burst Mode^® Operation
• 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 LTC3400-1 is a synchronous, fixed frequency, stepup DC/DC converter delivering high efficiency in a 6-lead ThinSOT^™ package. Capable of supplying 3.3V at 100mA from a single AA cell input, the device contains 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 LTC3400-1 features automatic shifting to power saving Burst Mode operation at light loads. In shutdown, V_OUT and V_IN are connected, which allows the input battery to be used for backup power. The LTC3400-1 features low shutdown current of under 1µA.

The LTC3400-1 is offered in the low profile (1mm)SOT-23 package.

US Patent Numbers 5,481,178; 6,580,258; 6,304,066; 6,127,815; 6,498,466; 6,611,131.