LTC3862-2

RECOMMENDED FOR NEW DESIGNS

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

Part Models: 18
1ku List Price: Starting From $3.95

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Part Details

Wide V_IN Range: 5.5V to 36V Operation
2-Phase Operation Reduces Input and Output Capacitance
Fixed Frequency, Peak Current Mode Control
Internal 10V LDO Regulator
Lower UVLO Thresholds Allows the Use of MOSFETs Rated at 6V V_GS
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)
24-Lead Narrow SSOP Package
5mm × 5mm QFN Package with 0.65mm Lead Pitch
24-Lead Thermally Enhanced TSSOP Package

The LTC3862-2 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. Multiphase 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 10V 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	UV+	UV-
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: 18
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-2#PBF	24-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3862EFE-2#TRPBF	24-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3862EGN-2#PBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3862EGN-2#TRPBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3862EUH-2#PBF	24-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3862EUH-2#TRPBF	24-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3862HFE-2#PBF	24-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3862HFE-2#TRPBF	24-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3862HGN-2#PBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3862HGN-2#TRPBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3862HUH-2#PBF	24-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3862HUH-2#TRPBF	24-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3862IFE-2#PBF	24-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3862IFE-2#TRPBF	24-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3862IGN-2#PBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3862IGN-2#TRPBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3862IUH-2#PBF	24-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3862IUH-2#TRPBF	24-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

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-2#PBF	PRODUCTION
LTC3862EFE-2#TRPBF	PRODUCTION
LTC3862HFE-2#PBF	PRODUCTION
LTC3862HFE-2#TRPBF	PRODUCTION
LTC3862IFE-2#PBF	PRODUCTION
LTC3862IFE-2#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-2#PBF	PRODUCTION
LTC3862EGN-2#TRPBF	PRODUCTION
LTC3862HGN-2#PBF	PRODUCTION
LTC3862HGN-2#TRPBF	PRODUCTION
LTC3862IGN-2#PBF	PRODUCTION
LTC3862IGN-2#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
Silicon Oscillators 1
LTC6908		Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LT4363	RECOMMENDED FOR NEW DESIGNS	High Voltage Surge Stopper with Current Limit

Tools & Simulations

LTspice 3

Models for the following parts are available in LTspice:

LTC3862
LTC3862-1
LTC3862-2

LTpowerCAD 1

LTC3862-2 Project - Multi-Phase Current Mode Step-Up DC/DC Controller (6-36V to 50V @ 10A)

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

LTC3862EUH-2 Demo Board | Boost Controller, 6V ≤ VIN ≤ 36V; VOUT = 50V @ 10A

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Product Details

Demonstration circuit 2006A-A is a multiphase high power, high voltage step-up DC/DC converter featuring the LTC3862-2 boost controller. This demo board converts a 6V to 36V input voltage to a 50V output at up to 10A with four phases by utilizing and synchronizing two LTC3862-2 controller IC’s.

Resources

DC2006A - Design Files
4/3/2015

DC2006A - Schematic
4/3/2015

DC2006A-A - Demo Manual
4/3/2015

LTC3862EUH-2 Demo Board | Boost Controller, 6V ≤ VIN ≤ 36V; VOUT = 120V @ 2A

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Product Details

Demonstration circuit 2006A-B is a multiphase high power, high voltage step-up DC/DC converter featuring two the LTC3862-2 boost controllers. This demo board converts a 6V to 36V input voltage to a 120V output at up to 2.5A with two stages. The first stage converts the input voltage to 50V. The second stage converts the 50V to 120V and each stage uses one LTC3862-2.

Resources

DC2006A - Design Files
4/3/2015

DC2006A - Schematic
4/3/2015

DC2006A-B - Demo Manual
4/3/2015

LTC3862EFE-2 Demo Board | 2-Phase SEPIC, 6V ≤ VIN ≤ 60V; VOUT = 12V @ 6A

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Product Details

Demonstration circuit 1891A is a 2-phase high efficiency nonisolated SEPIC (Single Ended Primary Inductor Converter) converter featuring the LTC3862-2 switching controller. The DC1891A converts a 6V to 60V input to a 12V output and provides 6A of output current. The DC1891A can be easily modified to generate output voltages in the range from 0.8V to 48V.

Resources

DC1891A - Demo Manual
10/3/2012

DC1891A - Schematic
10/3/2012

DC1891A - Design Files
10/3/2012

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Part Details

Documentation

Data Sheet 1

Reliability Data 1

User Guide 3

Software Resources

Can't find the software or driver you need?

Hardware Ecosystem

Tools & Simulations

LTspice 3

Models for the following parts are available in LTspice:

LTpowerCAD 1

Evaluation Kits

Product Details

Resources

Product Details

Resources

Product Details

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Latest Discussions

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