LTC3871

RECOMMENDED FOR NEW DESIGNS

Bidirectional PolyPhase Synchronous Buck or Boost Controller

Data Sheet (Rev. D) Product Selection Table

Part Models: 14
1ku List Price: Starting From $6.36

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Part Details

Unique Architecture Allows Dynamic Regulation of Input Voltage, Output Voltage or Current
V_HIGH Voltages Up to 100V
V_LOW Voltages Up to 30V
Synchronous Rectification: Up to 97% Efficiency
ADI-Proprietary Advanced Current Mode Control
±1% Voltage Regulation Accuracy Over Temperature
Accurate, Programmable Output Current Monitoring and Regulation for Both Buck and Boost Operation

Selectable Buck and Boost Current Sense Limits
Programmable DRV_CC/EXTV_CC Optimizes Efficiency
Programmable V_HIGH UV and OV Thresholds
Programmable V_LOW OV Threshold
Phase-Lockable Frequency: 60kHz to 460kHz
Multiphase/Multi-ICs Operation Up to 12 Phases
Selectable CCM/DCM Modes
Thermally Enhanced 48-Lead LQFP Package
AEC-Q100 Qualified for Automotive Applications

Part Models: 14
1ku List Price: Starting From $6.36

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
LTC3871ELXE#PBF	48-Lead LQFP (7mm x 7mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3871ELXE-1#PBF	48-Lead LQFP (7mm x 7mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3871ELXE-1#TRPBF	48-Lead LQFP (7mm x 7mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3871HLXE#3ZZPBF	48-Lead LQFP (7mm x 7mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3871HLXE#PBF	48-Lead LQFP (7mm x 7mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3871HLXE#WPBF	48-Lead LQFP (7mm x 7mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3871HLXE-1#PBF	48-Lead LQFP (7mm x 7mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3871HLXE-1#WPBF	48-Lead LQFP (7mm x 7mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3871ILXE#PBF	48-Lead LQFP (7mm x 7mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3871ILXE#WPBF	48-Lead LQFP (7mm x 7mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3871ILXE-1#3OZPBF	48-Lead LQFP (7mm x 7mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3871ILXE-1#3ZZPBF	48-Lead LQFP (7mm x 7mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3871ILXE-1#PBF	48-Lead LQFP (7mm x 7mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3871ILXE-1#WPBF	48-Lead LQFP (7mm x 7mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jun 24, 2021 - 21_0046 Transfer of LQFP and LQFP_EP from AEM to AET
		PCN21_0046_Form Material_Report Qualification Results Summary Other
LTC3871ELXE#PBF	PRODUCTION
LTC3871ELXE-1#PBF	PRODUCTION
LTC3871ILXE#PBF	PRODUCTION
LTC3871ILXE-1#PBF	PRODUCTION
Dec 17, 2021 - 21_0046 Transfer of LQFP and LQFP_EP from AEM to AET
		PCN21_0046_Form Material_Report Qualification Results Summary Other
LTC3871HLXE#PBF	PRODUCTION
LTC3871HLXE-1#PBF	PRODUCTION

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

Hardware Ecosystem

Parts	Product Life Cycle	Description
High Voltage Hot Swap Controllers 1
LTC4380	RECOMMENDED FOR NEW DESIGNS	Low Quiescent Current Surge Stopper
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LTC4368	RECOMMENDED FOR NEW DESIGNS	100V UV/OV and Reverse Protection Controller with Bidirectional Circuit Breaker

Tools & Simulations

LTspice 3

Models for the following parts are available in LTspice:

LTC3871

LTpowerCAD 2

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.

LTpowerCAD^® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

Evaluation Kits

LTC3871HLXE#PBF Demo Board | Bidirectional Controller, Buck Mode: 30V ≤ VIN ≤ 75V, VOUT = 12V @ 30A; Boost Mode: 10V ≤ VIN ≤ 13V, VOUT = 48V @ 7.5A

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Product Details

Demonstration circuit 2348A is a high power high efficiency bi-directional synchronous buck or boost converter featuring the LTC3871 and is available in two versions. The DC2348A-A operates with two each LTC3871 devices with four phases and the DC2348A-B utilizes one LTC3871 device with two phases.