LTC3302

RECOMMENDED FOR NEW DESIGNS

LTC3302

5V, 2A Synchronous Step-Down Regulator in 2mm × 2mm FCQFN

RECOMMENDED FOR NEW DESIGNS

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Part Models 7

1ku List Price Starting From $1.08

Features

High Efficiency: 30mΩ NMOS, 85mΩ PMOS
Peak Current Mode Control

27ns Minimum On-Time
Wide Bandwidth, Fast Transient Response

Low-Ripple Burst Mode^® Operation with I_Q of 80μA
Up to 6MHz Operation
Safely Tolerates Inductor Saturation in Overload
V_IN Range: 2.25V to 5.5V
Fixed V_OUT Range: 0.5V to 3.65V, Factory Programmed in 50mV Steps

V_OUT Accuracy: ±1% Overtemperature Range
Precision 400mV Enable Threshold
Shutdown Current: 1μA
Power Good, Internal Compensation and Soft-Start
Thermally Enhanced, 12-Pin, 2mm × 2mm, Flip Chip (FCQFN) Package with Side Wettable Flanks
AEC-Q100 Qualified for Automotive Applications

Additional Details

The LTC3302 is a very small, high efficiency, low noise, monolithic synchronous 2A step-down DC/DC converter operating from a 2.25V to 5.5V input supply. Using constant frequency, peak current mode control, this regulator achieves fast transient response with small external components.

The LTC3302 operates in forced continuous or pulse-skipping mode for low noise, or in 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. The adjustable version operates from 500mV to V_IN with two additional external resistors. Other features include output overvoltage protection, short-circuit protection, thermal shutdown, clock synchronization, and up to 100% duty cycle operation for low dropout.

The LTC3302 is available in a low profile 2mm × 2mm FCQFN package with exposed pad and side wettable flanks.

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 7

1ku List Price Starting From $1.08

Technical Documents 2

LTC3302: 5V, 2A Synchronous Step-Down Regulator in 2mm × 2mm FCQFN Data Sheet (Rev.0) 01/16/2023

UG-2105: Evaluating the LTC3302A, 3.3 V to 1.2 V at 2 A, 2 MHz Synchronous Step-Down Regulator in a 2 mm × 2 mm SWF FCQFN (Rev.0) 04/04/2023

Design Resources 7

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
LTC3302AJUCM#WTRPBF	12-Lead Plastic Side Solderable TQFN (2mm × 2mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3302AJUCM-1#WTRPBF	12-Lead Plastic Side Solderable TQFN (2mm × 2mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3302AJUCM-1.2#WTRPBF	12-Lead Plastic Side Solderable TQFN (2mm × 2mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3302AJUCM-1.8#WTRPBF	12-Lead Plastic Side Solderable TQFN (2mm × 2mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3302ARUCM#TRPBF	12-Lead Plastic Side Solderable TQFN (2mm × 2mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3302CJUCM#WTRPBF	12-Lead Plastic Side Solderable TQFN (2mm × 2mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3302CRUCM#TRPBF	12-Lead Plastic Side Solderable TQFN (2mm × 2mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC3302AJUCM#WTRPBF
Pin/Package Drawing
12-Lead Plastic Side Solderable TQFN (2mm × 2mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3302AJUCM-1#WTRPBF
Pin/Package Drawing
12-Lead Plastic Side Solderable TQFN (2mm × 2mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3302AJUCM-1.2#WTRPBF
Pin/Package Drawing
12-Lead Plastic Side Solderable TQFN (2mm × 2mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3302AJUCM-1.8#WTRPBF
Pin/Package Drawing
12-Lead Plastic Side Solderable TQFN (2mm × 2mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3302ARUCM#TRPBF
Pin/Package Drawing
12-Lead Plastic Side Solderable TQFN (2mm × 2mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3302CJUCM#WTRPBF
Pin/Package Drawing
12-Lead Plastic Side Solderable TQFN (2mm × 2mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3302CRUCM#TRPBF
Pin/Package Drawing
12-Lead Plastic Side Solderable TQFN (2mm × 2mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

DC3251A

Evaluating the LTC3302A, 3.3 V to 1.2 V at 2 A, 2 MHz Synchronous Step-Down Regulator in a 2 mm × 2 mm SWF FCQFN

Evaluating the LTC3302A, 3.3 V to 1.2 V at 2 A, 2 MHz Synchronous Step-Down Regulator in a 2 mm × 2 mm SWF FCQFN

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DC3251A

Evaluating the LTC3302A, 3.3 V to 1.2 V at 2 A, 2 MHz Synchronous Step-Down Regulator in a 2 mm × 2 mm SWF FCQFN

Features and Benefits

LTC3302A evaluation board
Transient circuit included for load-transient evaluation
EMI filter included to reduce noise in EMI emission tests

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Product Detail

Demonstration Circuit DC3251A features the LTC3302A, 5 V, 2 A synchronous step-down silent switcher operating as a 2 MHz, 3.3 V to 1.2 V, 2 A buck regulator. The LTC3302A supports adjustable output voltages from 0.5 V to V_IN. The LTC3302A is a compact, high efficiency, and high-speed synchronous monolithic step-down switching regulator. A minimum on-time of 27 ns enables high V_IN to low V_OUT conversion.

The DC3251A operating mode can be selected as Burst Mode operation, skip (PS) or forced continuous (FC) mode. Setting JP1 to the SKIP position allows the LTC3302A to sync to a clock frequency from 1.6 MHz to 2.4 MHz. The LTC3302A operates in forced continuous mode when syncing to an external clock.

The DC3251A also has an EMI filter to reduce conducted EMI. This EMI filter can be included by applying the input voltage at the VIN EMI terminal. The EMI performance of the board is shown in the EMI Test Results section. The red lines in the EMI performance graphs show the CISPR25 Class 5 peak limits for the conducted and radiated emission tests.

The LTC3302A data sheet gives a complete description of the device, operation, and application information. Full specifications on the LTC3302A are available in the LTC3302A data sheet available from Analog Devices, Inc., and must be consulted with the user guide when using the DC3251A evaluation board. The LTC3302A is assembled in a 2 mm × 2 mm FCQFN package with side wettable flanks (SWF) for visual solder inspection. The layout recommendations for low EMI operation and maximum thermal performance are available in the data sheet section Low EMI PCB Layout.

Resources

PDF

UG-2105: Evaluating the LTC3302A, 3.3 V to 1.2 V at 2 A, 2 MHz Synchronous Step-Down Regulator in a 2 mm × 2 mm SWF FCQFN (Rev.0)

939.84 K

ZIP

DC3251A - Design Files

2.6 M

PDF

DC3251A - Schematic

103.58 K

DC3251A

Evaluating the LTC3302A, 3.3 V to 1.2 V at 2 A, 2 MHz Synchronous Step-Down Regulator in a 2 mm × 2 mm SWF FCQFN

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.