LTC3863

RECOMMENDED FOR NEW DESIGNS

60V Low I_QInverting DC/DC Controller

Data Sheet (Rev. B) Product Selection Table

Part Models: 16
1ku List Price: Starting From $2.49

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Overview

Wide Operating V_IN Range: 3.5V to 60V
Wide Negative V_OUT Range: –0.4V to Beyond –150V
Low Operating I_Q = 70µA
Strong High Voltage MOSFET Gate Driver
Constant Frequency Current Mode Architecture
Verified FMEA for Adjacent Pin Open/Short
Selectable High Efficiency Burst Mode^® Operation or Pulse-Skipping Mode at Light Loads

Programmable Fixed Frequency: 50kHz to 850kHz
Phase-Lockable Frequency: 75kHz to 750kHz
Accurate Current Limit
Programmable Soft-Start or Voltage Tracking
Internal Soft-Start Guarantees Smooth Start-Up
Low Shutdown I_Q = 7µA
Available in Small 12-Lead Thermally Enhanced MSOP and DFN Packages

The LTC3863 is a robust, inverting DC/DC PMOS controller optimized for automotive and industrial applications. It drives a P-channel power MOSFET to generate a negative output and requires just a single inductor to complete the circuit. Output voltages from –0.4V to –150V are typically achievable with higher voltages possible, only limited by external components.

The LTC3863 offers excellent light load efficiency, drawing only 70μA quiescent current in a user programmable Burst Mode operation. Its peak current mode, constant frequency PWM architecture provides for good control of switching frequency and output current limit. The switching frequency can be programmed from 50kHz to 850kHz with an external resistor and can be synchronized to an external clock from 75kHz to 750kHz.

The LTC3863 offers programmable soft-start or output tracking. Safety features include overvoltage, overcurrent and short-circuit protection including frequency foldback.

The LTC3863 is available in thermally enhanced 12-lead MSOP and 3mm × 4mm DFN packages.

Applications

Industrial and Automotive Power Supplies
Telecom Power Supplies
Distributed Power Systems

Part Models: 16
1ku List Price: Starting From $2.49

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
LTC3863EDE#PBF	12-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3863EDE#TRPBF	12-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3863EMSE#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3863EMSE#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3863HDE#PBF	12-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3863HDE#TRPBF	12-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3863HMSE#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3863HMSE#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3863IDE#PBF	12-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3863IDE#TRPBF	12-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3863IMSE#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3863IMSE#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3863MPDE#PBF	12-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3863MPDE#TRPBF	12-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3863MPMSE#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3863MPMSE#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	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
LTC3863EDE#PBF	PRODUCTION
LTC3863EDE#TRPBF	PRODUCTION
LTC3863EMSE#PBF	PRODUCTION
LTC3863EMSE#TRPBF	PRODUCTION
LTC3863HMSE#PBF	PRODUCTION
LTC3863HMSE#TRPBF	PRODUCTION
LTC3863IDE#PBF	PRODUCTION
LTC3863IDE#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
LTC3863EMSE#PBF	PRODUCTION
LTC3863EMSE#TRPBF	PRODUCTION
LTC3863HMSE#PBF	PRODUCTION
LTC3863HMSE#TRPBF	PRODUCTION
LTC3863IMSE#PBF	PRODUCTION
LTC3863IMSE#TRPBF	PRODUCTION
LTC3863MPMSE#PBF	PRODUCTION
LTC3863MPMSE#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
LTC3863EMSE#PBF	PRODUCTION
LTC3863EMSE#TRPBF	PRODUCTION
LTC3863HMSE#PBF	PRODUCTION
LTC3863HMSE#TRPBF	PRODUCTION
LTC3863IMSE#PBF	PRODUCTION
LTC3863IMSE#TRPBF	PRODUCTION
LTC3863MPMSE#PBF	PRODUCTION
LTC3863MPMSE#TRPBF	PRODUCTION
Apr 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper
		PCN25_0017_Form Material_Report Qualification Results Summary
LTC3863HDE#PBF	PRODUCTION
LTC3863HDE#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
Protection Switches & Controllers 1
LTC4364	RECOMMENDED FOR NEW DESIGNS	Surge Stopper with Ideal Diode

Tools & Simulations

LTspice 1

LTC3863 Demo Circuit - Low Iq Inverting DC/DC Converter (4.5-16V to -12V @ 1A)

Models for the following parts are available in LTspice:

LTC3863

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

LTC3863EMSE Demo Board | 4.5V-16V; VOUT = -5.2V @ 1.7A or -12V @ 1A

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Product Details

Demonstration circuit 1737A is a current-mode inverting DC/DC converter featuring the LTC3863. The board operates from an input range of 4.5V to 16V, and provides a –5.2V, 1.7A output or a –12V, 1A output (jumper selectable). It operates at 400kHz and may be synchronized to an external clock. A soft-start feature controls output voltage slew rate at start-up, reducing current surge and voltage overshoot. Burst Mode^® operation that improves efficiency at light loads can be enabled with a jumper. A power good output signal is provided. The demonstration board has options for larger MOSFET and diode packages on the back of the board for higher output current requirements.