LT3509

PRODUCTION

Dual 36V, 700mA Step-Down Regulator

Data Sheet Product Selection Table
Part Models
10
1ku List Price
Starting From $3.54
Viewing:

Part Details

  • Two 700mA Switching Regulators with Internal Power Switches
  • Wide 3.6V to 36V Operating Range
  • Overvoltage Lockout Protects Circuit Through 60V Supply Transients
  • Short-Circuit Robust
  • Low Dropout Voltage: 95% Maximum Duty Cycle
  • Adjustable 300kHz to 2.2MHz Switching Frequency Synchronizable Over the Full Range
  • Uses Small Inductors and Ceramic Capacitors
  • Integrated Boost Diodes
  • Internal Compensation
  • Thermally Enhanced 14-Lead (4mm × 3mm) DFN and 16 Lead MSOP Packages
LT3509
Dual 36V, 700mA Step-Down Regulator
3.3V and 5V Dual Output Step-Down Converter Efficiency Product Package 1 Product Package 2
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project
Ask a Question

Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Technical Articles 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

Learn More
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project

Hardware Ecosystem

Parts Product Life Cycle Description
Digital Power System Managers 1
LTC2974
RECOMMENDED FOR NEW DESIGNS 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Dual-Supply Monitors 1
LTC2960
RECOMMENDED FOR NEW DESIGNS 36V Nano-Current Two-Input Voltage Monitor
High Voltage Hot Swap Controllers 1
LTC4364
RECOMMENDED FOR NEW DESIGNS Surge Stopper with Ideal Diode
Silicon Oscillators 1
LTC6908
Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation
Modal heading
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project

Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LT3509
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.

Evaluation Kits

eval board
schematic 1
DC1248A

LT3509EDE Demo Board | 6.5V ≤ VIN ≤ 36V (60V Transients), VOUT1 = 5V @ 0.7A, VOUT2 = 3.3V @ 0.7A

Buy Now View Details

Product Details

Demonstration circuit 1248 is a dual monolithic buck regulator featuring the LT3509. The demo circuit is designed for 5V@700mA and 3.3V@700mA output from a 6.5V to 36V input. The input voltage can go up to 60V without damaging the part. The switching frequency can be set from 300kHz to 2.2MHz by a single external resistor, and it is synchronizable over the full range. The power switches, the compensation components and the boost diodes are all integrated into the silicon. The shutdown and soft start function is independent for each channel. The current mode control scheme creates fast transient response and good loop stability. The part has overvoltage lockout, cycle by cycle current limit and thermal shutdown. DA pin can further protect the silicon under fault conditions by sensing the diode current.


 
DC1248A
LT3509EDE Demo Board | 6.5V ≤ VIN ≤ 36V (60V Transients), VOUT1 = 5V @ 0.7A, VOUT2 = 3.3V @ 0.7A
DC1248A - Schematic

Reference Designs

Arria V SoC Development Kit
Arria V SoC Development Kit
DK-DEV-5ASTD5NES Block Diagram
DK-DEV-5ASTD5NES Power Tree
Altera Arria V SoC Development Kit and SoC Embedded Design Suite Circuits from the lab

View Detailed Reference Design

Features and 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
DC934A Demo Board for DK-DEV-5CSXC6N
DC934A Demo Board for DK-DEV-5CSXC6N
DK-DEV-5CSXC6N Dev Kit
DK-DEV-5CSXC6N Block Diagram
DK-DEV-5CSXC6N Power Tree
DK-DEV-5CSXC6N LTC Power Tree
Altera Cyclone V SoC Development Kit and SoC Embedded Design Suite Circuits from the lab

View Detailed Reference Design

Features and 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
Altera Arria V SoC Development Kit and SoC Embedded Design Suite
Arria V SoC Development Kit
DK-DEV-5ASTD5NES Block Diagram
DK-DEV-5ASTD5NES Power Tree
Altera Cyclone V SoC Development Kit and SoC Embedded Design Suite
DC934A Demo Board for DK-DEV-5CSXC6N
DK-DEV-5CSXC6N Dev Kit
DK-DEV-5CSXC6N Block Diagram
DK-DEV-5CSXC6N Power Tree
DK-DEV-5CSXC6N LTC Power Tree

Latest Discussions

No discussions on lt3509 yet. Have something to say?

Start a Discussion on EngineerZone®

Recently Viewed