LTC3312SA
5V, Dual 6A/Dual-Phase 12A Step-Down DC/DC Regulator
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Overview
Features and Benefits
- 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
- VIN Range: 2.25V to 5.5V
- VOUT Range: 0.5V to VIN
- Programmable Frequency to 3MHz
- Low Ripple Burst Mode® Operation with Low IQ
- 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
Product 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
Product Categories
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 (2)
Documentation & Resources
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DC3092A - Demo Manual (Rev. 0)4/1/2022PDF1 M
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DC3091A - Demo Manual (Rev. 0)4/1/2022PDF1 M
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 Simulations
Models for the following parts are available in LTspice:
LTC3312SA
LTpowerCAD
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.
Design tools for the following parts are available in LTpowerCAD:
LTC3312SA
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 |
|---|---|---|---|---|
| LTC3312SAAV#PBF | Material Declaration | Reliability Data | 22-Lead LQFN (4mm × 3mm × 0.95mm) | |
| LTC3312SAJV#WPBF | Material Declaration | Reliability Data | 22-Lead LQFN (4mm × 3mm × 0.95mm) | |
| Wafer Fabrication Data |
Support & Discussions
Sample & Buy
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Lead Times
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Sampling
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
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.