LTC3862

PRODUCTION

Multi-Phase Current Mode Step-Up DC/DC Controller

Data Sheet (Rev. E) Product Selection Table

Part Models: 22
1ku List Price: Starting From $3.95

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Overview

Wide V_IN Range: 4V to 36V Operation
2-Phase Operation Reduces Input and Output Capacitance
Fixed Frequency, Peak Current Mode Control
5V Gate Drive for Logic-Level MOSFETs
Adjustable Slope Compensation Gain
Adjustable Max Duty Cycle (Up to 96%)
Adjustable Leading Edge Blanking
±1% Internal Voltage Reference
Programmable Operating Frequency with One External Resistor (75kHz to 500kHz)

Phase-Lockable Fixed Frequency 50kHz to 650kHz
SYNC Input and CLKOUT for 2-, 3-, 4-, 6- or 12-Phase Operation (PHASEMODE Programmable)
Internal 5V LDO Regulator
24-Lead Narrow SSOP Package
5mm × 5mm QFN with 0.65mm Lead Pitch and 24-Lead Thermally Enhanced TSSOP Packages
AEC-Q100 Qualified for Automotive Applications

The LTC3862 is a two phase constant frequency, current mode boost and SEPIC controller that drives N-channel power MOSFETs. Two phase operation reduces system filtering capacitance and inductance requirements.

The operating frequency can be set with an external resistor over a 75kHz to 500kHz range and can be synchronized to an external clock using the internal PLL. Multi-phase operation is possible using the SYNC input, the CLKOUT output and the PHASEMODE control pin allowing 2-, 3-, 4-, 6- or 12-phase operation.

Other features include an internal 5V LDO with undervoltage lockout protection for the gate drivers, a precision RUN pin threshold with programmable hysteresis, soft-start and programmable leading edge blanking and maximum duty cycle.


Part Number	Vin Range	INTVcc	V_IN ON	V_IN OFF
LTC3862	4V to 36V	5V	3.3V	2.9V
LTC3862-1	8.5V to 36V	10V	7.5V	7.0V
LTC3862-2	5.5V to 36V	10V	4.4V	3.9V

APPLICATIONS

Automotive, Telecom and Industrial Power Supplies

Part Models: 22
1ku List Price: Starting From $3.95

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
LTC3862EFE#PBF	24-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3862EFE#TRPBF	24-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3862EGN#PBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3862EGN#TRPBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3862EUH#PBF	24-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3862EUH#TRPBF	24-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3862HFE#PBF	24-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3862HFE#TRPBF	24-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3862HFE#WPBF	24-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3862HFE#WTRPBF	TSSOP W/ THERMAL PAD	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3862HGN#PBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3862HGN#TRPBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3862HUH#PBF	24-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3862HUH#TRPBF	24-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3862IFE#PBF	24-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3862IFE#TRPBF	24-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3862IFE#WPBF	24-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3862IFE#WTRPBF	24-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3862IGN#PBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3862IGN#TRPBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3862IUH#PBF	24-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3862IUH#TRPBF	24-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Apr 17, 2025 - 25_0043 Change of Gold to Copper Wire and BOM (Automotive)
		PCN25_0043_Form Material_Report Delta Qualification Matrix Qualification Results Summary
LTC3862EFE#PBF	PRODUCTION
LTC3862EFE#TRPBF	PRODUCTION
LTC3862EUH#PBF	PRODUCTION
LTC3862EUH#TRPBF	PRODUCTION
LTC3862HFE#PBF	PRODUCTION
LTC3862HFE#TRPBF	PRODUCTION
LTC3862HFE#WPBF	PRODUCTION
LTC3862HFE#WTRPBF	PRODUCTION
LTC3862IFE#PBF	PRODUCTION
LTC3862IFE#TRPBF	PRODUCTION
LTC3862IFE#WPBF	PRODUCTION
LTC3862IFE#WTRPBF	PRODUCTION
LTC3862IUH#PBF	PRODUCTION
LTC3862IUH#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 Delta Qualification Matrix
LTC3862EFE#PBF	PRODUCTION
LTC3862EFE#TRPBF	PRODUCTION
LTC3862HFE#PBF	PRODUCTION
LTC3862HFE#TRPBF	PRODUCTION
LTC3862HFE#WPBF	PRODUCTION
LTC3862HFE#WTRPBF	PRODUCTION
LTC3862IFE#PBF	PRODUCTION
LTC3862IFE#TRPBF	PRODUCTION
LTC3862IFE#WPBF	PRODUCTION
LTC3862IFE#WTRPBF	PRODUCTION
Oct 3, 2024 - 24_0235 (QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking
		PCN24_0235_Form Material_Report Other Delta Qualification Matrix
LTC3862EGN#PBF	PRODUCTION
LTC3862EGN#TRPBF	PRODUCTION
LTC3862HGN#PBF	PRODUCTION
LTC3862HGN#TRPBF	PRODUCTION
LTC3862IGN#PBF	PRODUCTION
LTC3862IGN#TRPBF	PRODUCTION
Aug 10, 2022 - 22_0177 Laser Top Mark Conversion for QSOP20_24_28 Assembled in ADPG [PNG] and UTL
		PCN22_0177_Form Material_Report Delta Qualification Matrix
LTC3862EGN#PBF	PRODUCTION
LTC3862EGN#TRPBF	PRODUCTION
LTC3862HGN#PBF	PRODUCTION
LTC3862HGN#TRPBF	PRODUCTION
LTC3862IGN#PBF	PRODUCTION
LTC3862IGN#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
Oscillators 2
LTC6908		Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation
LTC6909	PRODUCTION	1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation
Protection Switches & Controllers 1
LT4363	RECOMMENDED FOR NEW DESIGNS	High Voltage Surge Stopper with Current Limit

Tools & Simulations

LTspice 1

LTC3862 Demo Circuit - High Power, High Voltage Boost Converter with Tapped Inductor Topology (12V to 120V @ 2.0A)

Models for the following parts are available in LTspice:

LTC3862
LTC3862-1
LTC3862-2

LTpowerCAD 2

Design tools for the following parts are available in LTpowerCAD:

LTC3862
LTC3862-1
LTC3862-2

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

LTC3862EGN Demo Board | 5V to 36VIN, 48VOUT @ 5A, Multiphase Boost Controller

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Product Details

Demonstration circuit 1286A is DC/DC boost converter featuring the LTC3862EGN/-1 constant frequency current mode boost controllers. The DC1286A-A (LTC3862) operates over 5V to 36V input and provides 2A-5A of output current at 48V output. The DC1286A-B (LTC3862-1, higher V_IN min and higher gate drive) operates over 8V to 36V input and provides 3A-5A of output current at 48V output. The 200kHz constant frequency operation results in small and efficient circuit. The converter provides high output voltage accuracy (typically ±3%) over wide load range with no minimum load requirement. The demonstration circuit can be easily modified to generate different output voltages.