LTC3441
PRODUCTIONHigh Current Micropower Synchronous Buck-Boost DC/DC Converter
- Part Models
- 2
- 1ku List Price
- Starting From $5.99
Overview
- Regulated Output with Input Above, Below or Equal to the Output
- Single Inductor, No Schottky Diodes
- High Efficiency: Up to 95%
- 25µA Quiescent Current in Burst Mode® Operation
- Up to 1.2A Continuous Output Current from a Single Lithium-Ion
- True Output Disconnect in Shutdown
- 2.4V to 5.5V Input Range
- 2.4V to 5.25V Output Range
- 1MHz Fixed Frequency Operation
- Synchronizable Oscillator
- Selectable Burst Mode or Fixed Frequency Operation
- <1µA Quiescent Current in Shutdown
- Small, Thermally Enhanced 12-Lead (4mm × 3mm) DFN package
The LTC3441 is a high efficiency, fixed frequency, buck-boost DC/DC converter that operates efficiently from input voltages above, below or equal to the output voltage. The topology incorporated in the IC provides a continuous transfer function through all operating modes, making the product ideal for single lithium ion or multicell applications where the output voltage is within the battery voltage range.
The device includes two 0.10Ω N-channel MOSFET switches and two 0.11Ω P-channel switches. External Schottky diodes are optional, and can be used for a moderate efficiency improvement. The operating frequency is internally set to 1MHz and can be synchronized up to 1.7MHz. Quiescent current is only 25µA in Burst Mode operation, maximizing battery life in portable applications. Burst Mode operation is user controlled and can be enabled by driving the MODE/SYNC pin high. If the MODE/SYNC pin is driven low or with a clock, then fixed frequency switching is enabled.
Other features include a 1µA shutdown, soft-start control, thermal shutdown and current limit. The LTC3441 is available in a thermally enhanced 12-lead (4mm × 3mm) DFN package.
Applications
- Handheld Computers
- Handheld Instruments
- MP3 Players
- Digital Cameras
Documentation
Data Sheet 1
User Guide 2
Technical Articles 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC3441EDE#PBF | 12-Lead DFN (4mm x 3mm w/ EP) | ||
| LTC3441EDE#TRPBF | 12-Lead DFN (4mm x 3mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC3441
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
