LT8210

100V V_IN and V_OUT Synchronous 4-Switch Buck‑Boost DC/DC Controller with PassThru

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Recommended for New Designs

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Overview

Features and Benefits
Product Details

Features and Benefits

Pin-Selectable PassThru or Fixed Output CCM, DCM, Burst Mode^® Operation
Programmable Non-Switching PassThru Window
18μA PassThru Mode I_Q with 99.9% Efficiency
V_IN Range: 2.8V to 100V (4.5V for Start-Up)
V_OUT Range: 1V to 100V
Reverse Input Protection to –40V
±1.25% Output Voltage Accuracy (–40°C to 125°C)
±3% Accurate Current Monitoring
±5% Accurate Current Regulation
10V Quad N-Channel MOSFET Gate Drivers

EXTV_CC LDO Powers Drivers from V_OUT/External Rail
±20% Cycle-by-Cycle Inductor Current Limit
No Top MOSFET Refresh Noise in Buck or Boost
Fixed/Phase-Lockable Frequency: 80kHz to 400kHz
Spread Spectrum Frequency Modulation for Low EMI
Power Good Output Voltage/Overcurrent Monitor
Available in a 38-Lead TSSOP and 40-Lead (6mm x 6mm) QFN Packages

Product Details

The LT8210 is a 4-switch synchronous buck-boost DC/DC controller that can operate in passthru, forced continuous, pulse-skipping and Burst Mode^® operation. PassThru is a feature that passes the input directly to the output when the input is within a user programmable window. PassThru mode eliminates switching losses and EMI along with maximizing efficiency. For input voltages above or below the passthru window, the buck or boost regulation loops maintain the output at the set maximum or minimum values, respectively.

The GATEV_CC driver supply is regulated to 10.6V allowing the use of standard-level MOSFETs and can be powered through the EXTV_CC pin for improved efficiency. The GATEV_CC regulator is back-drive-protected to ride through input brownouts while maintaining regulation. Optional reverse input protection down to –40V can be implemented with the addition of a single N-channel MOSFET. The LT8210 includes a precision current sense amplifier that can accurately monitor and limit output or input average current.

Applications

Automotive, Industrial, Telecom, Avionics Systems
Automotive Start-Stop, Emergency Call Applications
ISO 7637, ISO 16750, MIL-1275, DO-160 Applications

Product Categories

Power Management
- External Power Switch Buck-Boost Controllers

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Product Lifecycle Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (3)

DC2814A-B

LT8210 Demo Board | 9V to 36V_IN, 80V_IN Surge (60s), V_OUT = 24V to 36V at 2.5A

DC2814A-C

LT8210 Demo Board | 26V to 80V_IN, V_OUT = 36V to 56V at 2A

DC2814A-A

LT8210 Demo Board | 8V to 40V_IN, 80V_IN Surge (60s), Operates Down to 3.5V_IN after Start-Up, V_OUT = 8V to 16V at 3A

DC2814A-B

View Detailed Evaluation Kit Information

Demonstration circuit 2814A-B is a high voltage, high efficiency synchronous buck-boost DC/DC converter with an input voltage range of 9V to 80V. It can supply a 2.5A maximum load current with an output range of 24V to 34V. The demo board features the LT8210EUJ controller. The constant frequency current mode architecture allows a phase-lockable frequency of up to 400kHz, while an optional input or output current feedback loop provides support for applications such as battery charging. With a wide input range, wide output range, and seamless transfers between operation modes, the LT8210 is ideal for industrial, automotive, medical, military, and avionics applications.

The converter has four modes of operation: burst, pulse skip, forced continuous mode, or pass-thru. Pass-thru is a feature that passes the input directly to the output when the input voltage is within a user programmable window. Switching losses drop to zero and efficiency is maximized. For input voltage above or below the pass-thru window, the buck or boost regulation loops maintain the output at the set maximum or minimum values, respectively. Reverse input protection to –40V is also implemented on this demo board.

The available versions of the DC2814A are:

DC2814A-A: 8V to 40V_IN, 80V_IN Surge (60s), Operates Down to 3.5V_IN after Start-Up, V_OUT = 8V to 16V at 3A

DC2814A-B: 9V to 36V_IN, 80V_IN Surge (60s), V_OUT = 24V to 36V at 2.5A

DC2814A-C: 26V to 80V_IN, V_OUT = 36V to 56V at 2A

Resources

DC2814A-C

View Detailed Evaluation Kit Information

Demonstration circuit 2814A-C is a high voltage, high efficiency synchronous buck-boost DC/DC converter with an input voltage range of 26V to 80V. It can supply a 2A maximum load current with an output range of 36V to 56V. The demo board features the LT8210EUJ controller. The constant frequency current mode architecture allows a phase-lockable frequency of up to 400kHz, while an optional input or output current feedback loop provides support for applications such as battery charging. With a wide input range, wide output range and seamless transfers between operation modes, the LT8210 is ideal for industrial, automotive, medical, military and avionics applications.

The converter has four modes of operation: burst, pulse skip, forced continuous mode, or pass-thru. Pass-thru is a feature that passes the input directly to the output when the input voltage is within a user programmable window. Switching losses drop to zero and efficiency is maximized. For input voltage above or below the pass-thru window the buck or boost regulation loops maintain the output at the set maximum or minimum values, respectively. Reverse input protection to –40V is also implemented on this demo board.

The available versions of the DC2814A are:

DC2814A-A: 8V to 40V_IN, 80V_IN Surge (60s), Operates Down to 3.5V_IN after Start-Up, V_OUT = 8V to 16V at 3A

DC2814A-B: 9V to 36V_IN, 80V_IN Surge (60s), V_OUT = 24V to 36V at 2.5A

DC2814A-C: 26V to 80V_IN, V_OUT = 36V to 56V at 2A

Resources

DC2814A-A

View Detailed Evaluation Kit Information

Demonstration circuit 2814A-A is a high voltage, high efficiency synchronous buck-boost DC/DC converter with an input voltage range of 8V to 80V. After the part has started, the input voltage can run down to 3.5V. It can supply a 3A maximum load current with an output range of 8V to 16V. The demo board features the LT8210EUJ controller. The constant frequency current mode architecture allows a phase-lockable frequency of up to 400kHz, while an optional input or output current feedback loop provides support for applications such as battery charging. With a wide input range, wide output range, and seamless transfers between operation modes, the LT8210 is ideal for industrial, automotive, medical, military, and avionics applications.

The available versions of the DC2814A are:

DC2814A-A: 8V to 40V_IN, 80V_IN Surge (60s), Operates Down to 3.5V_IN after Start-Up, V_OUT = 8V to 16V at 3A

DC2814A-B: 9V to 36V_IN, 80V_IN Surge (60s), V_OUT = 24V to 36V at 2.5A

DC2814A-C: 26V to 80V_IN, V_OUT = 36V to 56V at 2A

Resources

Documentation & Resources

Data Sheets

LT8210: 100V V_IN and V_OUT Synchronous 4-Switch Buck-Boost DC/DC Controller with Pass-Thru Data Sheet (Rev. B)
6/21/2019

PDF

7 M

Reliability Data

R570 Reliability Data
3/23/2018

PDF

415 K

User Guides

DC2814A-C Demo Manual
9/25/2019

PDF

930 K
DC2814A-B Demo Manual
9/25/2019

PDF

941 K
DC2814A-A Demo Manual
9/25/2019

PDF

919 K

Videos

Superimposed AC/Audio Tests of the LT8210
8/20/2021
LT8210 Buck-Boost Controller with Pass-Thru Superimposed AC Demo
5/27/2020

Design Notes

4-Switch Buck-Boost Controller with Pass-Thru Capability Eliminates Switching Noise
11/1/2019

Technical Articles

NEW
Why Using PassThru Technology Can Help Extend an Energy Storage System’s Life
6/1/2023 Analog Dialogue
PassThru of a Voltage Using Buck-Boost Regulators
11/1/2021
Protecting and Powering Automotive Electronics Systems with No Switching Noise and 99.9% Efficiency
2/1/2020 Analog Dialogue

Tools & Simulations

LTspice

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.

LTspice downloads and documentation

LTspice Simulations

LT8210 Demo Circuit - Pass-Thru Regulator for Automotive Electronics Systems with 99.9% Efficiency (3-100V to 12V @ 5A)

Models for the following parts are available in LTspice:

LT8210

Design Resources

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 Number	Material Declaration	Reliability Data	Pin/Package Drawing	CAD Symbols, Footprints & 3D Models
LT8210EFE#PBF	Material Declaration	Reliability Data	38-Lead TSSOP w/ EP	Ultra Librarian SamacSys
LT8210EFE#TRPBF	Material Declaration	Reliability Data	38-Lead TSSOP w/ EP	Ultra Librarian SamacSys
LT8210EUJ#PBF	Material Declaration	Reliability Data	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Ultra Librarian SamacSys
LT8210EUJ#TRPBF	Material Declaration	Reliability Data	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Ultra Librarian SamacSys
LT8210IFE#PBF	Material Declaration	Reliability Data	38-Lead TSSOP w/ EP	Ultra Librarian SamacSys
LT8210IFE#TRPBF	Material Declaration	Reliability Data	38-Lead TSSOP w/ EP	Ultra Librarian SamacSys
LT8210IUJ#PBF	Material Declaration	Reliability Data	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Ultra Librarian SamacSys
LT8210IUJ#TRPBF	Material Declaration	Reliability Data	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Ultra Librarian SamacSys
Wafer Fabrication Data		R570 Reliability Data

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Support & Discussions

LT8210 Discussions

RE: simulating output voltage LT8210 in LTspice

RE: LT8210 Burn out the mosfet

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.