LTC7813

RECOMMENDED FOR NEW DESIGNS

LTC7813

Low I_Q, 60V Synchronous Boost+Buck Controller

RECOMMENDED FOR NEW DESIGNS

Wide Input Range to 10V/10A Low IQ Cascaded Boost+Buck Regulator slide

Wide Input Range to 10V/10A Low IQ Cascaded Boost+Buck Regulator

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Part Models 8

1ku List Price Starting From $5.75

Features

Synchronous Boost and Buck Controllers
When Cascaded, Allows V_IN Above, Below, or Equal to Regulated V_OUT of Up to 60V
Wide Bias Input Voltage Range: 4.5V to 60V
Output Remains in Regulation Through Input Dips (e.g. Cold Crank) Down to 2.2V
Adjustable Gate Drive Level 5V to 10V (OPTI-DRIVE)
Low EMI with Low Input and Output Ripple
Fast Output Transient Response
No External Bootstrap Diodes Required
High Light Load Efficiency
Low Operating I_Q: 29μA (One Channel On)
Low Operating I_Q: 34μA (Both Channels On)
R_SENSE or Lossless DCR Current Sensing
Buck Output Voltage Range: 0.8V ≤ V_OUT ≤ 60V
Boost Output Voltage Up 60V
Phase-Lockable Frequency (75kHz to 850kHz)
Small 32-Pin 5mm × 5mm QFN Package

Additional Details

The LTC7813 is a high performance synchronous Boost+Buck DC/DC switching regulator controller that drives all N-channel power MOSFET stages. It contains independent step-up (boost) and step-down (buck) controllers that can regulate two separate outputs or be cascaded to regulate an output voltage from an input voltage that can be above, below, or equal to the output voltage. The LTC7813 operates from a wide 4.5V to 60V input supply range. When biased from the output of the boost regulator, the LTC7813 can operate from an input supply as low as 2.2V after start-up. The 34μA no-load quiescent current (both channels on) extends operating runtime in battery-powered systems.

Unlike conventional buck-boost regulators, the LTC7813’s cascaded Boost+Buck solution has continuous, nonpulsating, input and output currents, substantially reducing voltage ripple and EMI. The LTC7813 has independent feedback and compensation points for the boost and buck regulation loops, enabling a fast output transient response that can be externally optimized.

Applications

Automotive and Industrial Power Systems
High Power Battery Operated 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 8

1ku List Price Starting From $5.75

Technical Documents 3

LTC7813: Low IQ, 60V Synchronous Boost+Buck Controller Data Sheet 03/16/2016

R526 Reliability Data 03/26/2018

DC2435A - Demo Manual 05/13/2016

Design Resources 8

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
LTC7813EUH#PBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC7813EUH#TRPBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC7813HUH#PBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC7813HUH#TRPBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC7813IUH#PBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC7813IUH#TRPBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC7813MPUH#PBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC7813MPUH#TRPBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC7813EUH#PBF
Pin/Package Drawing
32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC7813EUH#TRPBF
Pin/Package Drawing
32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC7813HUH#PBF
Pin/Package Drawing
32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC7813HUH#TRPBF
Pin/Package Drawing
32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC7813IUH#PBF
Pin/Package Drawing
32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC7813IUH#TRPBF
Pin/Package Drawing
32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC7813MPUH#PBF
Pin/Package Drawing
32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC7813MPUH#TRPBF
Pin/Package Drawing
32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

Companion Parts 1

Parts	Product Life Cycle	Description
Surge Stopper, Overvoltage, and Overcurrent Protection1
LT4363	RECOMMENDED FOR NEW DESIGNS	High Voltage Surge Stopper with Current Limit

Alternative Parts 1

Parts	Product Life Cycle	Description
LTC7812	RECOMMENDED FOR NEW DESIGNS	Low I_Q, 38V Synchronous Boost+Buck Controller

DC2435A-B

LTC7813EUH Demo Board | Sync Boost + Sync Buck, 4V ≤ VIN ≤ 56V; VOUT1 (Quasi Regulated) = 19V-28.6V @ 5A

DC2435A-B

LTC7813EUH Demo Board | Sync Boost + Sync Buck, 4V ≤ VIN ≤ 56V; VOUT1 (Quasi Regulated) = 19V-28.6V @ 5A

Buy Now View Details

Product Detail

Demonstration circuit DC2435A is a step-up/down supply featuring the LTC7813EUH. The LTC7813 is a high performance dual output (buck and boost) synchronous DC/DC switching regulator controller. The board has three different configurations:

DC2435A-A: Regulated output voltage of 24 Volt
DC2435A-B: Narrowed output voltage between 20V and 28V
DC2435A-C: Dual output voltages of 24V (Boost VBUS channel) and 5V (Buck V_OUT1 channel)

The circuit enables a drop-in layout where the total circuit area is only 1½" by 1½". The LTC7813EUH is in a 32-lead exposed pad QFN package.

Resources

PDF

DC2435A - Demo Manual

754.00K

ZIP

DC2435A - Design Files

1.00M

PDF

DC2435A - Schematic

91.00K

DC2435A-C

LTC7813EUH Demo Board | Sync Boost + Sync Buck, 4V ≤ VIN ≤ 56V; Dual Output, VBoost = 24V @ 3A, Vbuck = 5V @ 8A

DC2435A-C Evaluation Board - Bottom View

LTC7813EUH Demo Board | Sync Boost + Sync Buck, 4V ≤ VIN ≤ 56V; Dual Output, VBoost = 24V @ 3A, Vbuck = 5V @ 8A

Download

DC2435A-C

LTC7813EUH Demo Board | Sync Boost + Sync Buck, 4V ≤ VIN ≤ 56V; Dual Output, VBoost = 24V @ 3A, Vbuck = 5V @ 8A

Buy Now View Details

Product Detail

DC2435A-A: Regulated output voltage of 24 Volt
DC2435A-B: Narrowed output voltage between 20V and 28V
DC2435A-C: Dual output voltages of 24V (Boost V_BUS channel) and 5V (Buck V_OUT1 channel)

The circuit enables a drop-in layout where the total circuit area is only 1½" by 1½". The LTC7813EUH is in a 32-lead exposed pad QFN package.

Resources

PDF

DC2435A - Demo Manual

754.00K

ZIP

DC2435A - Design Files

1.00M

PDF

DC2435A - Schematic

91.00K

DC2435A-A

LTC7813EUH Demo Board | Sync Boost + Sync Buck, 4V ≤ VIN ≤ 56V; VOUT1 = 24V @ 5A

DC2435A-A

LTC7813EUH Demo Board | Sync Boost + Sync Buck, 4V ≤ VIN ≤ 56V; VOUT1 = 24V @ 5A

Buy Now View Details

Product Detail

DC2435A-A: Regulated output voltage of 24 Volt
DC2435A-B: Narrowed output voltage between 20V and 28V
DC2435A-C: Dual output voltages of 24V (Boost VBUS channel) and 5V (Buck V_OUT1 channel)

The circuit enables a drop-in layout where the total circuit area is only 1½" by 1½". The LTC7813EUH is in a 32-lead exposed pad QFN package.

Resources

PDF

DC2435A - Demo Manual

754.00K

ZIP

DC2435A - Design Files

1.00M

PDF

DC2435A - Schematic

91.00K

DC2435A-B

LTC7813EUH Demo Board | Sync Boost + Sync Buck, 4V ≤ VIN ≤ 56V; VOUT1 (Quasi Regulated) = 19V-28.6V @ 5A

DC2435A-C

LTC7813EUH Demo Board | Sync Boost + Sync Buck, 4V ≤ VIN ≤ 56V; Dual Output, VBoost = 24V @ 3A, Vbuck = 5V @ 8A

DC2435A-A

LTC7813EUH Demo Board | Sync Boost + Sync Buck, 4V ≤ VIN ≤ 56V; VOUT1 = 24V @ 5A

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

LTC7813 - PMIC and Multifunction

5.17 K

LTpowerCAD 2

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