LTC3865
LTC3865-1

Name: LTC3865
Brand: Analog Devices
Price: 4.37 USD
Availability: InStock

PRODUCTION

Dual, 2-Phase Synchronous DC/DC Controller with Pin Selectable Outputs

Data Sheet Product Selection Table

Part Models: 12
1ku List Price: Starting From $4.04

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Overview

Dual, 180° Phased Controllers
2-Pin VID Output Voltage Programming from 0.6V to 5V
High Efficiency: Up to 95%
R_SENSE or DCR Current Sensing
Phase-Lockable Fixed Frequency 250kHz to 770kHz
Adjustable Current Limit
Dual N-Channel MOSFET Synchronous Drive
Wide V_IN Range: 4.5V to 38V Operation
Adjustable Soft-Start Current Ramping or Tracking
Output OV Protection With Reverse Current Limit
Power Good Output Voltage Monitor
32-Pin 5mm × 5mm QFN and 38-Lead TSSOP Packages

Part Models: 12
1ku List Price: Starting From $4.04

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
LTC3865EFE#PBF	38-Lead TSSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3865EFE#TRPBF	38-Lead TSSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3865EUH#PBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3865EUH#TRPBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3865EUH-1#PBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3865EUH-1#TRPBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3865IFE#PBF	38-Lead TSSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3865IFE#TRPBF	38-Lead TSSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3865IUH#PBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3865IUH#TRPBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3865IUH-1#PBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3865IUH-1#TRPBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

May 18, 2026 - 26_0072 Epoxy Change for Select TSSOP Products
		PCN26_0072_Form Material_Report
LTC3865EFE#PBF	PRODUCTION
LTC3865EFE#TRPBF	PRODUCTION
LTC3865IFE#PBF	PRODUCTION
LTC3865IFE#TRPBF	PRODUCTION
Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL
		PCN22_0068_Form Material_Report
LTC3865EFE#PBF	PRODUCTION
LTC3865EFE#TRPBF	PRODUCTION
LTC3865IFE#PBF	PRODUCTION
LTC3865IFE#TRPBF	PRODUCTION
Jan 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products
		PCN21_0269_Form Material_Report Detailed Change Description
LTC3865EUH#PBF	PRODUCTION
LTC3865EUH#TRPBF	PRODUCTION
LTC3865EUH-1#PBF	PRODUCTION
LTC3865EUH-1#TRPBF	PRODUCTION
LTC3865IUH#PBF	PRODUCTION
LTC3865IUH#TRPBF	PRODUCTION
LTC3865IUH-1#PBF	PRODUCTION
LTC3865IUH-1#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
Circuit Monitors 1
LTC2960	RECOMMENDED FOR NEW DESIGNS	36V Nano-Current Two-Input Voltage Monitor
Overvoltage & Overcurrent Protectors 1
LTC4365	RECOMMENDED FOR NEW DESIGNS	Overvoltage, Undervoltage and Reverse Supply Protection Controller
Power System Management (PSM) & Sequencers 1
LTC2974	RECOMMENDED FOR NEW DESIGNS	4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Switching Regulators & Controllers 1
LTC3880	RECOMMENDED FOR NEW DESIGNS	Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management

Tools & Simulations

LTspice 1

LTC3865 Demo Circuit - High Efficiency 1.5V @ 15A, 1.2V @ 15A Step-Down Converter Using Sense Resistors

Models for the following parts are available in LTspice:

LTC3865
LTC3865-1

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

LTC3865EUH Demo Board | 4.5V ≤ VIN ≤ 14V, VOUT1 = 1.5V @ 15A, VOUT2 = 1.2V @ 15A

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Product Details

Demonstration circuit 1479A is a dual output synchronous buck DC/DC converter featuring the LTC3865EUH. The input voltage range is from 4.5V to 14V. The outputs are 1.5V/15A and 1.2V/15A. Each output voltage can be precisely programmed to a preset value within 1% error using two 3-state programming pins. The output voltage can be set to 1.0V, 1.1V, 1.2V, 1.5V, 1.8V, 2.5V 3.3V or 5V. The LTC3865 differs from the LTC3865-1 in that the "-1" has a fixed current limit threshold. The 32-pin package options for both devices have no SGND pin and only one PGND pin.

Resources

DC1479A - Design Files
1/28/2010

DC1479A - Schematic
1/28/2010

DC1479A - Demo Manual
1/28/2010

LTC3865EUH-1 Demo Board | 4.5V ≤ VIN ≤ 14V, VOUT1 = 3.3V @ 5A, VOUT2 = 1.8V @ 5A

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Product Details

Demonstration circuit 1480A is a dual output synchronous buck DC/DC converter featuring the LTC3865EUH-1. The input voltage range is from 4.5V to 14V. The default outputs are 3.3V/5A and 1.8V/5A, but pin programming allows each output to be set at 5V, 3.3V, 2.5V, 1.8V, 1.5V, 1.2V, 1.1V, 1V or an adjustable voltage.