LTC3440

PRODUCTION

Micropower Synchronous Buck-Boost DC/DC Converter

Data Sheet Product Selection Table

Part Models: 4
1ku List Price: Starting From $3.30

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Part Details

Single Inductor
Fixed Frequency Operation with Battery Voltages
Above, Below or Equal to the Output
Synchronous Rectification: Up to 96% Efficiency
25µA Quiescent Current in Burst Mode^® Operation
Up to 600mA Continuous Output Current
No Schottky Diodes Required (V_OUT < 4.3V)
V_OUT Disconnected from V_IN During Shutdown
2.5V to 5.5V Input and Output Range
Programmable Oscillator Frequency from 300kHz to 2MHz
Synchronizable Oscillator
Burst Mode Enable Control
<1µA Shutdown Current
Small Thermally Enhanced 10-Pin MSOP and (3mm × 3mm) DFN Packages

Part Models: 4
1ku List Price: Starting From $3.30

Documentation

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
LTC3440EDD#PBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3440EDD#TRPBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3440EMS#PBF	10-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3440EMS#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 4, 2020 - 20_0130 Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0130_Form Material_Report
LTC3440EMS#PBF	PRODUCTION
LTC3440EMS#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

LTC3440

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.

Evaluation Kits

LTC3440EMS Demo Board (MSOP)| 1MHz, Synchronous Buck-Boost, VIN = 2.5V to 5.5V, VOUT = 3.3V @ 0.6A

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Product Details

Demonstration Circuit 425B is a constant-frequency synchronous Buck-Boost converter using the LTC3440. The input range is from 2.5V to 5.5V, making it ideal for single-cell lithium-ion or three-cell NiCd/NiMH battery applications. For 2.7V minimum input voltage, this converter can provide up to 600mA load current. The output voltage is set at 3.3V. A different output voltage in the range of 2.5V to 5.5V can be obtained by changing one of the feedback resistors.

Resources

DC425B - Demo Manual
406.00K

DC425B - Design File
614.00K

LTC3440EDD Demo Board (DFN) | 1MHz, Synchronous Buck-Boost, VIN = 2.5V to 5.5V, VOUT = 3.3V @ 0.6A

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Product Details

Demonstration Circuit 797 is a constant-frequency synchronous Buck-Boost converter using the LTC3440EDD in the 3mm × 3mm DFN-10 package. The input range is from 2.5V to 5.5V, making it ideal for single-cell Lithium-Ion or three-cell NiCd/NiMH battery applications. For 2.7V minimum input voltage, this converter can provide up to 600mA load current. The output voltage is set at 3.3V. A different output voltage in the range of 2.5V to 5.25V can be obtained by changing one of the feedback resistors.