Features: 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
Automatic Burst Mode®Operation (LTC3400)
Continuous Switching at Light Loads (LTC3400B)
Logic Controlled Shutdown (<1µA)
Antiringing Control Minimizes EMI
Tiny External Components
Low Profile (1mm) ThinSOTTM Package
Application Pagers
MP3 Players
Digital Cameras
LCD Bias Supplies
Handheld Instruments
Wireless Handsets
GPS ReceiversPinout
SpecificationsVIN Voltage.................................................. 0.3V to 6V
SW Voltage................................................... 0.3V to 6V
SHDN , FB Voltage......................................... 0.3V to 6V
VOUT.............................................................. 0.3V to 6V
Operating Temperature Range (Note 2).30°C to 85°C
Storage Temperature Range..................... 65°C to 125°
Lead Temperature (Soldering, 10 sec)....................300°C
DescriptionThe LTC®3400/LTC3400B are synchronous, fixed fre-quency, step-up DC/DC converters delivering high effi-ciency in a 6-lead ThinSOT package. Capable of supplying3.3V at 100mA from a single AA cell input, the devicescontain 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 isinternallycompensated, reducing external parts count. The LTC3400 features automatic shifting to power saving Burst Mode operation at light loads, while the LTC3400B features continuous switching at lightloads. Antiringing control circuitry reduces EMI concerns by damping the inductor in discontinuous mode, and the devices feature low shutdown current of under 1µA.Both devices are available in the low profile (1mm) ThinSOT package.
LTC3400B Data Sheet
