LTC3127

RECOMMENDED FOR NEW DESIGNS

1A Buck-Boost DC/DC Converter with Programmable Input Current Limit

Data Sheet Product Selection Table

Part Models: 4
1ku List Price: Starting From $3.54

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Part Details

Programmable (0.2A to 1A) ±4% Accurate Average Input Current Limit
Regulated Output with Input Voltages Above, Below or Equal to the Output
1.8V to 5.5V (Input) and 1.8V to 5.25V (Output) Voltage Range
0.6A Continuous Output Current: V_IN > 1.8V
1A Continuous Output Current: V_IN > 3V
Single Inductor
Synchronous Rectification: Up to 96% Efficiency
Burst Mode^® Operation: I_Q = 35μA (Pin Selectable)
Output Disconnect in Shutdown
<1μA Shutdown Current
Small, Thermally Enhanced 10-Lead (3mm × 3mm × 0.75mm) DFN and 12-Lead MSOP Packages

Part Models: 4
1ku List Price: Starting From $3.54

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
LTC3127EDD#PBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3127EDD#TRPBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3127EMSE#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3127EMSE#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper
		PCN25_0017_Form Material_Report Qualification Results Summary
LTC3127EMSE#PBF	PRODUCTION
LTC3127EMSE#TRPBF	PRODUCTION
Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)
		PCN24_0003_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC3127EMSE#PBF	PRODUCTION
LTC3127EMSE#TRPBF	PRODUCTION
Feb 4, 2020 - 20_0129 Laser Mark Conversion for 12-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0129_Form Material_Report
LTC3127EMSE#PBF	PRODUCTION
LTC3127EMSE#TRPBF	PRODUCTION

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

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Power Monitors 1
LT2940	PRODUCTION	Power and Current Monitor
PowerPath, Ideal Diodes, and Load Switches 1
LTC4417	RECOMMENDED FOR NEW DESIGNS	Prioritized PowerPath^™ Controller

Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

LTC3127

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

LTC3127EDD Demo Board | Programmable Average Input Current Limit, 1.2MHz, 1.8V ≤ VIN ≤ 5.5V, VOUT = 3.8V @ 2A Pulsed

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Product Details

Demonstration circuit 1451A is a Buck-Boost DC/DC converter featuring the LTC3127EDD and is ideally suited for pulsed load applications where the input current needs to be limited. Demonstration circuit 1451A is configured for 1.0A maximum input current limit and can handle pulsed load currents of up to 2A, with duty cycles of up to 15%. The input voltage range is 1.8V to 5.5V. The fixed input current limit can be adjusted by replacing one resistor (R6).

Resources

DC1451A - Design Files
2.00M

DC1451A - Schematic
71.00K

DC1451A - Demo Manual
945.00K

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