LTC3812-5

PRODUCTION

LTC3812-5

60V Current Mode Synchronous Switching Regulator Controller

PRODUCTION

High Efﬁciency High Voltage Step-Down Converter slide

High Efﬁciency High Voltage Step-Down Converter

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Part Models 4

1ku List Price Starting From $3.89

Features

High Voltage Operation: Up to 60V
Large 1Ω Gate Drivers
No Current Sense Resistor Required
Dual N-Channel MOSFET Synchronous Drive
Extremely Fast Transient Response
±0.5% 0.8V Voltage Reference
Programmable Soft-Start
Generates 5.5V Driver Supply
Selectable Pulse-Skipping Mode Operation
Power Good Output Voltage Monitor
Adjustable On-Time/Frequency: t_ON(MIN) < 100ns
Adjustable Cycle-by-Cycle Current Limit
Undervoltage Lockout On Driver Supply
Output Overvoltage Protection
Thermally Enhanced 16-Pin TSSOP Package

Additional Details

The LTC3812-5 is a synchronous step-down switching regulator controller that can directly step down voltages from up to 60V input, making it ideal for telecom and automotive applications. The LTC3812-5 uses a constant on-time valley current control architecture to deliver very low duty cycles with accurate cycle-by-cycle current limit without requiring a sense resistor.

A precise internal reference provides 0.5% DC accuracy. A high bandwidth (25MHz) error amplifier provides very fast line and load transient response. Large 1Ω gate drivers allow the LTC3812-5 to drive large power MOSFETs for higher current applications. The operating frequency is selected by an external resistor and is compensated for variations in V_IN. A shutdown pin allows the LTC3812-5 to be turned off reducing the supply current to <230μA.

Integrated bias control generates gate drive power from the input supply during start-up and when an output short-circuit occurs, with the addition of a small external SOT23 MOSFET. When in regulation, power is derived from the output for higher efficiency.


	Features	Adj UVLO, Sync & Tracking	Package
LTC3810	Vin 6.2V to 100V, 10V Driver Voltage	Yes	SSOP-28
LTC3810-5	Vin 4.35V to 60V, 5.5V Driver Voltage	Yes	QFN-32
LTC3812-5	Vin 4.35 to 60V, 5.5V Driver Voltage	No	TSSOP-16E

Applications

48V Telecom and Base Station Power Supplies
Networking Equipment, Servers
Automotive and Industrial Control Systems

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Ask a Question

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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 4

1ku List Price Starting From $3.89

Technical Documents 3

LTC3812-5: 60V Current Mode Synchronous Switching Regulator Controller Data Sheet 01/21/2011

R533 Reliability Data 03/26/2018

DC1035A - Demo Manual 09/24/2009

Design Resources 4

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
LTC3812EFE-5#PBF	16-Lead TSSOP w/ EP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3812EFE-5#TRPBF	16-Lead TSSOP w/ EP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3812IFE-5#PBF	16-Lead TSSOP w/ EP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3812IFE-5#TRPBF	16-Lead TSSOP w/ EP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC3812EFE-5#PBF
Pin/Package Drawing
16-Lead TSSOP w/ EP
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3812EFE-5#TRPBF
Pin/Package Drawing
16-Lead TSSOP w/ EP
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3812IFE-5#PBF
Pin/Package Drawing
16-Lead TSSOP w/ EP
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3812IFE-5#TRPBF
Pin/Package Drawing
16-Lead TSSOP w/ EP
Documentation

HTML Material Declaration

HTML Reliablity Data

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

PCN/PDN Information

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Part Models

Product Lifecycle

PCN

Apr 6, 2022

- 22_0068

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

LTC3812EFE-5#PBF

PRODUCTION

LTC3812EFE-5#TRPBF

PRODUCTION

LTC3812IFE-5#PBF

PRODUCTION

LTC3812IFE-5#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

LTC3812EFE-5#PBF

PRODUCTION

LTC3812EFE-5#TRPBF

PRODUCTION

LTC3812IFE-5#PBF

PRODUCTION

LTC3812IFE-5#TRPBF

PRODUCTION

pdf

PCN22_0068_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

Companion Parts 3

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Digital Power System Managers1
LTC2974	RECOMMENDED FOR NEW DESIGNS	4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Multiple Output Buck Regulators1
LTC3880	RECOMMENDED FOR NEW DESIGNS	Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management
Surge Stopper, Overvoltage, and Overcurrent Protection1
LT4363	RECOMMENDED FOR NEW DESIGNS	High Voltage Surge Stopper with Current Limit

DC1035A

LT3812EFE-5 | 7V ≤ VIN ≤ 60V, VOUT = 3.3V @ 6A

DC1035A

LT3812EFE-5 | 7V ≤ VIN ≤ 60V, VOUT = 3.3V @ 6A

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Product Detail

Demonstration circuit 1035 is a current mode synchronous switching regulator featuring the LTC3812-5. The circuit is configured as a synchronous step-down regulator operating at 260kHz switching frequency. The output voltage is 3.3V at 6A maximum load. The input voltage range is 7V to 60V.

Resources

PDF

DC1035A - Demo Manual

571.00K

ZIP

DC1035A - Design File

835.00K

PDF

DC1035A - Schematic

46.00K

DC1035A

LT3812EFE-5 | 7V ≤ VIN ≤ 60V, VOUT = 3.3V @ 6A

LTspice 1

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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.