LTC3896

RECOMMENDED FOR NEW DESIGNS

LTC3896

150V Low I_Q, Synchronous Inverting DC/DC Controller

RECOMMENDED FOR NEW DESIGNS

Part Details

High Efficiency 36V–72V to –48V/2A Inverting Regulator slide

Efficiency and Power Loss vs Load Current slide

High Efficiency 36V–72V to –48V/2A Inverting Regulator

Efficiency and Power Loss vs Load Current

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Part Models 6

1ku List Price Starting From $5.61

Features

Wide V_IN + |V_OUT^–| Range: 4V to 140V (150V Abs Max)
Wide Output Voltage Range: –60V to –0.8V
Ground-Referenced Control / Interface Pins
Adjustable Gate Drive Level 5V to 10V (OPTI-DRIVE)
Integrated Bootstrap Diode
Low Operating I_Q: 40μA (Shutdown = 10μA)
Selectable Gate Drive UVLO Thresholds
Onboard LDO or External NMOS LDO for DRV_CC
EXTV_CC LDO Powers Drivers from Output
Phase-Lockable Frequency (75kHz to 850kHz)
Programmable Fixed Frequency (50kHz to 900kHz)
Selectable Continuous, Pulse-Skipping or Low Ripple Burst Mode^® Operation at Light Loads
Adjustable Burst Clamp and Current Limit
Power Good Output Voltage Monitor
Programmable Input Overvoltage Lockout
38-Lead TSSOP High Voltage Package

Additional Details

The LTC3896 is a high performance inverting DC/DC switching regulator controller that drives an all N-channel synchronous power MOSFET stage. It converts a wideranging positive input voltage source to a regulated negative output that can be as much as 60V below ground. The input can operate from a voltage as low as 4V and as high as 140V – |V_OUT^–|.

The LTC3896 contains true ground-referenced RUN, PLLIN and PGOOD pins, eliminating the need for external discrete level-shifting components to interface with the LTC3896.

A constant frequency current mode architecture allows a phase-lockable frequency of up to 850kHz. The low 40μA no-load quiescent current extends operating run time in battery-powered systems. OPTI-LOOP^® compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC3896 features a precision 0.8V reference and power good output indicator. The soft-start (SS) pin ramps the output voltage during start-up.

Applications

Automotive and Industrial Power Systems
Telecommunications Power Supplies
Distributed Power Systems

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Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

Other places you can find help

Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 6

1ku List Price Starting From $5.61

Documentation

Technical Documents 5

LTC3896: 150V Low IQ, Synchronous Inverting DC/DC Controller Data Sheet 04/28/2016

R526 Reliability Data 03/26/2018

DC2447A - Demo Manual (Rev.A) 08/11/2023

AN-2579: The Design of the Inverting Buck/Boost Converter Topology 07/24/2024

Design Note 561: High Voltage, High Efficiency Positive to Negative Converter 03/08/2017

Reference Materials 4

80V to 150V Non-Isolated DC/DC 02/06/2018

High Voltage Non-Isolated Devices 01/05/2018

Overcoming Constraints: Design a Precision Bipolar Power Supply on a Simple Buck Controller 12/03/2018

How to Leverage the Inverting Buck-Boost Topology in High Voltage Applications 10/01/2022

Design Resources 6

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
LTC3896EFE#PBF	38-Lead TSSOP w/ EP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3896EFE#TRPBF	38-Lead TSSOP w/ EP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3896HFE#PBF	38-Lead TSSOP w/ EP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3896HFE#TRPBF	38-Lead TSSOP w/ EP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3896IFE#PBF	38-Lead TSSOP w/ EP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3896IFE#TRPBF	38-Lead TSSOP w/ EP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC3896EFE#PBF
Pin/Package Drawing
38-Lead TSSOP w/ EP
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3896EFE#TRPBF
Pin/Package Drawing
38-Lead TSSOP w/ EP
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3896HFE#PBF
Pin/Package Drawing
38-Lead TSSOP w/ EP
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3896HFE#TRPBF
Pin/Package Drawing
38-Lead TSSOP w/ EP
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3896IFE#PBF
Pin/Package Drawing
38-Lead TSSOP w/ EP
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3896IFE#TRPBF
Pin/Package Drawing
38-Lead TSSOP w/ EP
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

PCN/PDN Information

Filter by Model

Part Models

Product Lifecycle

PCN

Apr 6, 2022

- 22_0068

Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LTC3896EFE#PBF

PRODUCTION

LTC3896EFE#TRPBF

PRODUCTION

LTC3896HFE#PBF

PRODUCTION

LTC3896HFE#TRPBF

PRODUCTION

LTC3896IFE#PBF

PRODUCTION

LTC3896IFE#TRPBF

PRODUCTION

pdf

PCN22_0068_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

Filter by Model

Part Models

Product Lifecycle

PCN

Apr 6, 2022

- 22_0068

Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LTC3896EFE#PBF

PRODUCTION

LTC3896EFE#TRPBF

PRODUCTION

LTC3896HFE#PBF

PRODUCTION

LTC3896HFE#TRPBF

PRODUCTION

LTC3896IFE#PBF

PRODUCTION

LTC3896IFE#TRPBF

PRODUCTION

pdf

PCN22_0068_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

Software & Part Ecosystem

Companion Parts 1

Parts	Product Life Cycle	Description
Surge Stopper, Overvoltage, and Overcurrent Protection1
LTC4366	RECOMMENDED FOR NEW DESIGNS	High Voltage Surge Stopper

Alternative Parts 1

Parts	Product Life Cycle	Description
LTC3895	RECOMMENDED FOR NEW DESIGNS	150V Low I_Q, Synchronous Step-Down DC/DC Controller

Evaluation Kit

DC2447A

LTC3896EFE Demo Board | Sync Inverting Controller, 7V ≤ VIN ≤ 72V; VOUT = -12V @ 5A

DC2447A

LTC3896EFE Demo Board | Sync Inverting Controller, 7V ≤ VIN ≤ 72V; VOUT = -12V @ 5A

Buy Now View Details

Product Detail

Demonstration circuit 2447A is a high voltage, high efficiency synchronous inverting converter featuring the LTC3896. This demo board has a wide input voltage range from 7V to 72V and produces a –12V output voltage.

The DC2447A is capable of delivering up to 5A of output current. Note that the thermal stress increases at lower input voltages due to increased input current.

Resources

PDF

DC2447A - Demo Manual (Rev.A)

658.16 K

ZIP

DC2447A - Design Files

1.00M

PDF

DC1447A - Schematic

40.00K

DC2447A

LTC3896EFE Demo Board | Sync Inverting Controller, 7V ≤ VIN ≤ 72V; VOUT = -12V @ 5A

Tools & Simulations

LTspice 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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

Lt Spice

LTC3896 - Switching Regulators

4.83 K

LTpowerCAD 1

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.

To open the project file for this circuit:

Step 1: Download and install LTpowerCAD on your computer.

Step 2: Click on the link(s) in the section below to download part-specific project files.

Step 3: If the project file doesn't run, right-click the link and select "Save Target As." Then start the LTpowerCAD tool and open the project file by selecing "Open Project" from the "File" menu.

LTpowerCAD download and documentation