LT3070

5A, Low Noise, Programmable Output, 85mV Dropout Linear Regulator

Buy Now

Recommended for New Designs

Top

Overview

Features and Benefits
Product Details

Features and Benefits

Output Current: 5A
Dropout Voltage: 85mV Typical
Digitally Programmable V_OUT : 0.8V to 1.8V
Digital Output Margining: ±1%, ±3% or ±5%
Low Output Noise: 25μV_RMS (10Hz to 100kHz)
Parallel Multiple Devices for 10A or More
Precision Current Limit: ±20%
±1% Accuracy Over Line, Load and Temperature
Stable with Low ESR Ceramic Output Capacitors (15μF Minimum)
High Frequency PSRR: 30dB at 1MHz
Enable Function Turns Output On/Off
VIOC Pin Controls Buck Converter to Maintain Low Power Dissipation and Optimize Efficiency
PWRGD/UVLO/Thermal Shutdown Flag
Current Limit with Foldback Protection
Thermal Shutdown
28-Lead (4mm × 5mm × 0.75mm) QFN Package

Product Details

The LT3070 is a low voltage, UltraFast^™ transient response linear regulator. The device supplies up to 5A of output current with a typical dropout voltage of 85mV. A 0.01μF reference bypass capacitor decreases output voltage noise to 25μV_RMS. The LT3070’s high bandwidth permits the use of low ESR ceramic capacitors, saving bulk capacitance and cost. The LT3070’s features make it ideal for high performance FPGAs, microprocessors or sensitive communication supply applications.

Output voltage is digitally selectable in 50mV increments over a 0.8V to 1.8V range. A margining function allows the user to adjust system output voltage in increments of ±1%, ±3% or ±5%. The IC incorporates a unique tracking function to control a buck regulator powering the LT3070’s input. This tracking function drives the buck regulator to maintain the LT3070’s input voltage to V_OUT + 300mV, minimizing power dissipation.

Internal protection includes UVLO, reverse-current protection, precision current limiting with power foldback and thermal shutdown. The LT3070 regulator is available in a thermally enhanced 28-lead, 4mm × 5mm QFN package.

Applications

FPGA and DSP Supplies
ASIC and Microprocessor Supplies
Servers and Storage Devices
Post Buck Regulation and Supply Isolation

Product Categories

Power Management
- Positive Linear Regulators (LDO)
- LDO Plus

Comparable Parts Click to see all in Parametric Search

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 (1)

DC1433A

LT3070EUFD Demo Board | 5A, Low Noise, Digitally Prog Output, Very Low Dropout Linear Regulator, 1.2V ≤ V_IN ≤ 3V, V_OUT = 0.8V to 1.8V @ 5A

DC1433A

View Detailed Evaluation Kit Information

Demonstration circuit 1433 is an adjustable 5A linear regulator featuring the LT3070. The LT3070 is a low dropout voltage, UltraFast^™ transient response linear regulator. The device supplies up to 5A of output current with a typical dropout voltage of 85mV. A 0.01μF reference bypass capacitor decreases output voltage noise to 25μV_RMS. The LT3070’s high bandwidth permits the use of low ESR ceramic capacitors. Output voltage is digitally selectable in 50mV increments over a 0.8V to 1.8V range. The demo board has a 1.2V to 3V input voltage range and a 2.5V to 3.6V BIAS voltage range. A margining function allows the user to tolerance system output voltage in increments of ±1%, ±3% or ±5%. To maintain proper performance and regulation, the BIAS supply voltage must be higher than the IN supply voltage. For a given V_OUT, the BIAS voltage must satisfy the following conditions: 2.2 ≤ V_BIAS ≤ 3.6V and V_BIAS ≥ (1.25 · V_OUT + 1V).

For V_OUT ≤ 0.95V, the minimum bias voltage is limited to 2.2V.

Resources

Documentation & Resources

Data Sheets

LT3070: 5A, Low Noise, Programmable Output, 85mV Dropout Linear Regulator Data Sheet
2/24/2015

PDF

833K

Reliability Data

R545 Reliability Data
3/26/2018

PDF

25 K

User Guides

DC1433A - Demo Manual
2/8/2010

PDF

326K

Product Selection Guide

Not Your Dad's LDO
7/12/2011

PDF

692K

Solutions Bulletins & Brochures

Linear Low Dropout (LDO) Regulator Solutions
4/17/2018

PDF

3 M

Videos

Design Notes

Dual Linear Regulator for Digital IC Power Enables On-the-Fly Output Adjustment and Dynamic Headroom Optimization
4/1/2020

Press Releases

UltraFast Digitally Programmable 5A LDO Features 85mV Dropout & 25uV_RMS Noise
9/17/2021

Technical Articles

Ultrafast, Low Noise, Low Dropout Linear Regulators Running in Parallel Produce Clean, Efficient, High Current Point-of-Load Power for FPGA and Server Backplanes
7/1/2010 LT Journal

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 downloads and documentation

LTspice Simulations

LT3070 Demo Circuit - 5A Low Noise, Programmable Output, 85mV Droput Linear Regulator (1.2V to 0.9V @ 5A)

Models for the following parts are available in LTspice:

LT3070

LT3070-1

Reference Designs (9)

Xilinx Virtex 7 PCI Express Gen 3/100Gig Networking Card

Xilinx Zynq Networking Platform

Xilinx Virtex-7 10G/40G/100G Optical Interface FPGA Platform

Stratix V Advanced System Development Board

Xilinx Kintex®-7 PCI Express Development Board

Xilinx Virtex™ -7 High-End Networking Card With Dual CXP Ports

Xilinx Virtex-7 V2000T PCI Express Development Board

Altera 100G Development Kit, Stratix V Edition

HTG-937: Xilinx Virtex UltraScale+ ™ VU37P/VU47P HBM Development Board

Xilinx Virtex 7 PCI Express Gen 3/100Gig Networking Card

View Detailed Reference Design Information

Features & Benefits

Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications

Parts Used

Xilinx Zynq Networking Platform

View Detailed Reference Design Information

Features & Benefits

Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications

Parts Used

Xilinx Virtex-7 10G/40G/100G Optical Interface FPGA Platform

View Detailed Reference Design Information

Features & Benefits

Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications

Parts Used

Stratix V Advanced System Development Board

View Detailed Reference Design Information

Features & Benefits

Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications

Parts Used

Xilinx Kintex®-7 PCI Express Development Board

View Detailed Reference Design Information

Features & Benefits

Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications

Parts Used

Xilinx Virtex™ -7 High-End Networking Card With Dual CXP Ports

View Detailed Reference Design Information

Features & Benefits

Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications

Parts Used

Xilinx Virtex-7 V2000T PCI Express Development Board

View Detailed Reference Design Information

Features & Benefits

Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications

Parts Used

Altera 100G Development Kit, Stratix V Edition

View Detailed Reference Design Information

Features & Benefits

Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications

Parts Used

HTG-937: Xilinx Virtex UltraScale+ ™ VU37P/VU47P HBM Development Board

View Detailed Reference Design Information

Features & Benefits

The HTG-937 provides access to large FPGA gate density and 8GB/16GB of high bandwidth memory. It is populated with the Xilinx Zynq Virtex Ultrascale VU37P, or VU47P. Analog Devices power solution on this platform is fully validated to meet the requirements of Xilinx Zynq Virtex Ultrascale FPGAs to ensure a robust power delivery solution.

DC/DC μModule regulators are used on the HTG-937 to power Xilinx FPGA and/or SoC rails as well as other system rails. These regulators are highly integrated solutions with built in controller, power FETs, inductors, and capacitors that simplify layout and provide robust power delivery performance.

We provide supporting documentation including power schematics, layout, LTpowerPlanner and applicable LTpowerPlay configuration files to enable you to validate the power solution for your application seamlessly.

Parts Used

Product Recommendations

LT3070 Companion Parts

Recommended Related Parts

LTC2974, LTC4370, LT3071.

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.

Quality And Reliability

Symbols and Footprints

Request Product/Process Change Notifications

Save to myAnalog

Support & Discussions

LT3070 Discussions

LTM4646 Schematic help review

RE: LTM4646, LTM4622 and LT3070 Schematic help review

All LT3070 Discussions

Contact ADI Technical Support »

Ask your question »

Contact ADI Technical Support »

Ask your question »

Sample & Buy

Ordering FAQs

See our Ordering FAQs for answers to questions about online orders, payment options and more.

Buy Now Pricing

(**) Displayed Buy Now Price and Price Range is based on small quantity orders.

List Pricing

(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

Lead Times

Please see the latest communication from our CCO regarding lead times.

Sampling

Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.

Price Table Help

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.