LTC3307B

RECOMMENDED FOR NEW DESIGNS

LTC3307B

5V, 3A, 10MHz Synchronous Step-Down Silent Switcher in 2mm x 2mm LQFN

RECOMMENDED FOR NEW DESIGNS

Part Details

Not the part you were looking for?

Go to Product Selection Table

View All Documentation

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 18

1ku List Price Starting From $2.05

Features

Pin Compatible with LTC3308(4A) and LTC3309(6A)
High Efficiency: 8mΩ NMOS, 31mΩ PMOS
Programmable Frequency 3MHz to 10MHz

Tiny Inductor and Capacitors

Peak Current Mode Control

22ns Minimum On-Time
Wide Bandwidth, Fast Transient Response

Silent Switcher^® Architecture

Ultralow EMI Emissions

Low Ripple Burst Mode^® Operation with I_Q of 40μA
Safely Tolerates Inductor Saturation in Overload
V_IN Range: 2.25V to 5.5V
V_OUT Range: 0.5V to V_IN
V_OUT Accuracy: ±1% Over Temperature Range
Precision 400mV Enable Threshold, 1μA in Shutdown
Power Good, Internal Compensation and Soft-Start
Thermally Enhanced 2mm × 2mm LQFN Package
AEC-Q100 Qualified for Automotive Applications

Additional Details

The LTC3307B is a very small, high efficiency, low noise, monolithic synchronous 3A step-down DC/DC converter operating from a 2.25V to 5.5V input supply. Using constant-frequency, peak current mode control at switching frequencies 3MHz to 10MHz and minimum on-time as low as 22ns, this regulator achieves fast transient response with small external components. Silent Switcher architecture minimizes EMI emissions.

The LTC3307B operates in forced continuous or pulse- skipping mode for low noise, or low ripple Burst Mode operation for high efficiency at light loads, ideal for battery-powered systems. The IC regulates output voltages as low as 500mV. Other features include output over-voltage protection, short-circuit protection, thermal shut-down, clock synchronization, and up to 100% duty-cycle operation for low dropout. The device is available in a low profile 12-lead 2mm × 2mm × 0.74mm LQFN package with exposed pad for low thermal resistance.

APPLICATIONS

Optical Networking, Servers, Telecom
Automotive, Industrial, Communications
Distributed DC Power Systems (POL)
FPGA, ASIC, μP Core Supplies

View All Documentation

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 18

1ku List Price Starting From $2.05

Documentation

Technical Documents 2

LTC3307B: 5V, 3A, 10MHz Synchronous Step-Down Silent Switcher in 2mm x 2mm LQFN Data Sheet (Rev.0) 11/12/2020

R523 Reliability Data 03/24/2021

Reference Materials 3

Understanding Silent Switcher Technology: High Efficiency, Low EMI eBook 07/14/2023

Silent Switcher Technology 08/15/2023

Improving Switch-Mode Power Supplies Using Noise Cancelling Technology 03/17/2023

Design Resources 18

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
LTC3307BEV#TRMPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3307BEV#TRPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3307BEV#WTRMPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3307BEV#WTRPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3307BHV#TRMPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3307BHV#TRPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3307BHV#WTRMPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3307BHV#WTRPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3307BIV#TRMPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3307BIV#TRPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3307BIV#WTRMPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3307BIV#WTRPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3307BJV#TRMPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3307BJV#TRPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3307BJV#WTRMPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3307BJV#WTRPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3307BMPV#TRMPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3307BMPV#TRPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC3307BEV#TRMPBF
Pin/Package Drawing
12-Lead LQFN (2mm x 2mm x 0.74mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3307BEV#TRPBF
Pin/Package Drawing
12-Lead LQFN (2mm x 2mm x 0.74mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3307BEV#WTRMPBF
Pin/Package Drawing
12-Lead LQFN (2mm x 2mm x 0.74mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3307BEV#WTRPBF
Pin/Package Drawing
12-Lead LQFN (2mm x 2mm x 0.74mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3307BHV#TRMPBF
Pin/Package Drawing
12-Lead LQFN (2mm x 2mm x 0.74mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3307BHV#TRPBF
Pin/Package Drawing
12-Lead LQFN (2mm x 2mm x 0.74mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3307BHV#WTRMPBF
Pin/Package Drawing
12-Lead LQFN (2mm x 2mm x 0.74mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3307BHV#WTRPBF
Pin/Package Drawing
12-Lead LQFN (2mm x 2mm x 0.74mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3307BIV#TRMPBF
Pin/Package Drawing
12-Lead LQFN (2mm x 2mm x 0.74mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3307BIV#TRPBF
Pin/Package Drawing
12-Lead LQFN (2mm x 2mm x 0.74mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3307BIV#WTRMPBF
Pin/Package Drawing
12-Lead LQFN (2mm x 2mm x 0.74mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3307BIV#WTRPBF
Pin/Package Drawing
12-Lead LQFN (2mm x 2mm x 0.74mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3307BJV#TRMPBF
Pin/Package Drawing
12-Lead LQFN (2mm x 2mm x 0.74mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3307BJV#TRPBF
Pin/Package Drawing
12-Lead LQFN (2mm x 2mm x 0.74mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3307BJV#WTRMPBF
Pin/Package Drawing
12-Lead LQFN (2mm x 2mm x 0.74mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3307BJV#WTRPBF
Pin/Package Drawing
12-Lead LQFN (2mm x 2mm x 0.74mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3307BMPV#TRMPBF
Pin/Package Drawing
12-Lead LQFN (2mm x 2mm x 0.74mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3307BMPV#TRPBF
Pin/Package Drawing
12-Lead LQFN (2mm x 2mm x 0.74mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

Software & Part Ecosystem

Evaluation Kit

DC3054A-A

LTC3307B | 3.3V to 1.8V at 3A, 6.6MHz Low EMI Buck Regulator in a 0.47cm2 Solution

DC3054A-A Evaluation Board - Bottom View

LTC3307B | 3.3V to 1.8V at 3A, 6.6MHz Low EMI Buck Regulator in a 0.47cm2 Solution

Download

DC3054A-A

LTC3307B | 3.3V to 1.8V at 3A, 6.6MHz Low EMI Buck Regulator in a 0.47cm2 Solution

Buy Now View Details

Product Detail

Demonstration circuit 3054A-A features the LTC3307B 5V, 3A synchronous step-down Silent Switcher^® operating as a 6.6MHz, 3.3V to 1.8V 3A buck regulator. The LTC3307B supports adjustable output voltages from 0.5V to V_IN, and operating frequencies from 3MHz up to 10MHz. The LTC3307B is a compact, ultralow emission, high efficiency, and high speed synchronous monolithic step-down switching regulator. A minimum on-time of 22ns enables high V_IN to low V_OUT conversion ratios at high switching frequencies.

The DC3054A-A operating mode may be selected as Burst Mode^® operation, skip or forced continuous (FC) mode. Setting JP1 to the FC/SYNC position will allow the LTC3307B to sync to a clock frequency from 3MHz to 10MHz. The LTC3307B operates in forced continuous mode when syncing to an external clock. The DC3054A-A is set to a fixed 6.6MHz.

The DC3054A-A is set to a fixed 6.6MHz frequency by connecting RT to V_IN through a 0Ω resistor, R9. The frequency can be easily changed by removing R9 and setting an appropriate resistor in the R4 location to obtain the desired frequency. Refer to the LTC3307B data sheet for the proper R_T value for a desired switching frequency.

The LTC3307B data sheet gives a complete description of the device, operation and application information. The data sheet must be read in conjunction with the demo manual. The LTC3307B is assembled in a 2mm × 2mm LQFN package with exposed pads for low thermal resistance. The layout recommendations for low EMI operation and maximum thermal performance are available in the data sheet section Low EMI PCB Layout.

Resources

PDF

DC3054A-A - Demo Manual (Rev.0)

1.31 M

ZIP

DC3054A - Design Files

5.7 M

PDF

DC3054A - Schematic

119.93 K

DC3054A-A

LTC3307B | 3.3V to 1.8V at 3A, 6.6MHz Low EMI Buck Regulator in a 0.47cm2 Solution

Tools & Simulations

LTspice 2

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

LTspice AD5679R-LTC3307B Power supply output margining

6.43 K

Lt Spice

LTC3307B - Switching Regulators

1.81 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