LTC3312SA

RECOMMENDED FOR NEW DESIGNS

LTC3312SA

5V, Dual 6A/Dual-Phase 12A Step-Down DC/DC Regulator

RECOMMENDED FOR NEW DESIGNS

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Part Models 2

1ku List Price Starting From $3.32

Features

Dual 6A Outputs
Configurable as Single Output, 2-Phase 12A Buck
High Efficiency: 12mΩ High-Side and 8mΩ Low-Side
±1% Maximum Total DC Output Error
Wide Bandwidth, Fast Transient Response
Internal Input Capacitors Reduce EMI
V_IN Range: 2.25V to 5.5V
V_OUT Range: 0.5V to V_IN
Programmable Frequency to 3MHz
Low Ripple Burst Mode^® Operation with Low I_Q

Shutdown Current: 1.4μA
35ns Minimum On-Time
Internal Compensation
Precision Enable, Power Good for Power Sequencing
Tracking, Programmable Soft-Start, Temp Monitor Output
Thermally Enhanced, 22-Lead 4mm × 3mm × 0.95mm LQFN package
AEC-Q100 Qualified for Automotive Applications

Additional Details

The LTC3312SA features dual monolithic synchronous 6A step-down converters in a 4mm × 3mm package for space saving applications with demanding performance requirements. Using a constant frequency, peak current mode architecture at switching frequencies up to 3MHz, both bucks achieve high efficiency and fast transient response with small external components. The LTC3312SA can also be configured as a single output, 2-phase 12A step-down converter.

The LTC3312SA operates in forced continuous or pulse-skipping mode for low noise, or in Burst Mode operation for high efficiency at light loads. The common switching frequency is set to a default 2MHz, programmed with an external resistor, or synchronized to an external oscillator via the MODE/SYNC pin. To reduce input ripple current, the dual converters switch 180 degrees out of phase.

With an input range of 2.25V to 5.5V the LTC3312SA regulates to outputs as low as 500mV. Other features include precision enable thresholds, PGOOD signals, output overvoltage protection, thermal shutdown, and output short circuit protection. Programmable soft-start and a temperature monitor output are also included. The device is available in a low profile 22-lead 4mm × 3mm × 0.95mm LQFN package with exposed pad for low thermal resistance.

APPLICATIONS

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

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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 2

1ku List Price Starting From $3.32

Documentation

Technical Documents 3

LTC3312SA: 5V, Dual 6A/Dual-Phase 12A Step-Down DC/DC Regulator Data Sheet (Rev.0) 02/18/2022

DC3092A - Demo Manual (Rev.0) 04/01/2022

DC3091A - Demo Manual (Rev.0) 04/01/2022

Design Resources 2

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
LTC3312SAAV#PBF	22-Lead LQFN (4mm × 3mm × 0.95mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3312SAJV#WPBF	22-Lead LQFN (4mm × 3mm × 0.95mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC3312SAAV#PBF
Pin/Package Drawing
22-Lead LQFN (4mm × 3mm × 0.95mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3312SAJV#WPBF
Pin/Package Drawing
22-Lead LQFN (4mm × 3mm × 0.95mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

PCN/PDN Information

Filter by Model

Part Models

Product Lifecycle

PCN

Nov 15, 2023

- 23_0224

Qualification of SMT Attach Material and Die Thickness Update For LTC3312S

LTC3312SAAV#PBF

PRODUCTION

LTC3312SAJV#WPBF

PRODUCTION

pdf

PCN23_0224_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

pdf

Qualification Results Summary

Other

Filter by Model

Part Models

Product Lifecycle

PCN

Nov 15, 2023

- 23_0224

Qualification of SMT Attach Material and Die Thickness Update For LTC3312S

LTC3312SAAV#PBF

PRODUCTION

LTC3312SAJV#WPBF

PRODUCTION

pdf

PCN23_0224_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

pdf

Qualification Results Summary

Other

Software & Part Ecosystem

Evaluation Kit

DC3092A

LTC3312SA | 3.3V to 1V 12A, 2MHz Dual-Phase Low Ripple Step-Down DC/DC Regulator

LTC3312SA | 3.3V to 1V 12A, 2MHz Dual-Phase Low Ripple Step-Down DC/DC Regulator

Download

DC3092A

LTC3312SA | 3.3V to 1V 12A, 2MHz Dual-Phase Low Ripple Step-Down DC/DC Regulator

Buy Now View Details

Product Detail

Demo Circuit 3092A features the LTC3312SA, 5V, dual 6A/dual-phase 12A step-down DC/DC regulator IC. This demo circuit is configured as a 2-phase, 2MHz, 3.3V input, single 1V output, 12A buck regulator. The top switches are 180-degree out of phase to reduce the output ripple.

The LTC3312SA features dual monolithic synchronous 6A step-down power stages in a 3mm × 4mm package for space saving applications with demanding performance requirements. Both bucks achieve high efficiency and fast transient response with low external component count. The LTC3312SA can also be configured as a dual output, 6A per output, step-down converter. Please refer to DC3091A as a dual output application example. The LTC3312SA data sheet gives a complete description of its operation and application information. The data sheet must be read in conjunction with the demo manual when evaluating or modifying this demo circuit.

DC3092A supports three operation modes, including pulse skip, forced continuous, and Burst Mode^® operation. The clock frequency and the operation mode are shared by both buck phases. User can select desired operation mode with JP1 jumper. Setting JP1 to FC/SYNC position also allows the LTC3312SA to sync to a clock frequency from 1MHz to 3MHz, operating in forced continuous mode.

An EMI filter is included in this demo circuit for noise sensitive applications. To power with EMI filter, please apply input voltage via VIN EMI terminal.

Resources

PDF

DC3092A - Demo Manual (Rev.0)

1.01 M

PDF

DC3092A - Schematic

127 K

ZIP

DC3092A - Design Files

4.3 M

DC3091A

LTC3312SA | 3.3V to 1.2V and1.8V at 6A, 2MHz Dual Step-Down DC/DC Regulators

LTC3312SA | 3.3V to 1.2V and1.8V at 6A, 2MHz Dual Step-Down DC/DC Regulators

Download

DC3091A

LTC3312SA | 3.3V to 1.2V and1.8V at 6A, 2MHz Dual Step-Down DC/DC Regulators

Buy Now View Details

Product Detail

Demo Circuit 3091A features the LTC3312SA, 5V, dual 6A/dual-phase 12A step-down DC/DC regulator IC. This demo circuit is configured as a 2MHz, 3.3V input buck regulator with dual 6A output at 1.2V and 1.8V.

The LTC3312SA features dual monolithic synchronous 6A step-down power stages in a 3mm × 4mm package for space saving applications with demanding performance requirements. Both bucks achieve high efficiency and fast transient response with small external components. The LTC3312SA can also be configured as a single output, dual-phase 12A step-down converter. Please refer to DC3092A as a single output dual-phase application example. The LTC3312SA data sheet gives a complete description of its operation and application information. The data sheet must be read in conjunction with the demo manual when evaluating or modifying this demo circuit.

DC3091A supports three operation modes, including pulse skip, forced continuous and Burst Mode^® operation. The clock frequency and the operation mode are shared by both regulators. User can select desired operation mode with JP1 jumper. Setting JP1 to FC/SYNC position also allows the LTC3312SA to sync to a clock frequency from 1MHz to 3MHz, operating in forced continuous mode.

An EMI filter is included in this demo circuit for noise sensitive applications. To power with EMI filter, please apply input voltage via VIN EMI terminal.

Resources

PDF

DC3091A - Demo Manual (Rev.0)

1.14 M

PDF

DC3091A - Schematic

130.32 K

ZIP

DC3091A - Design Files

3.55 M

DC3092A

LTC3312SA | 3.3V to 1V 12A, 2MHz Dual-Phase Low Ripple Step-Down DC/DC Regulator

DC3091A

LTC3312SA | 3.3V to 1.2V and1.8V at 6A, 2MHz Dual Step-Down DC/DC Regulators

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.