LT3471
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LT3471

Dual 1.3A, 1.2MHz Boost/Inverter in 3mm × 3mm DFN

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 2
1ku List Price Starting From $3.75
Features
  • 1.2MHz Switching Frequency
  • Low VCESAT Switches: 330mV at 1.3A
  • High Output Voltage: Up to 40V
  • Wide Input Range: 2.4V to 16V
  • Inverting Capability
  • 5V at 630mA from 3.3V Input
  • 12V at 320mA from 5V Input
  • –12V at 200mA from 5V Input
  • Uses Tiny Surface Mount Components
  • Low Shutdown Current: <1µA
  • Low Profile (0.75mm) 10-Lead 3mm × 3mm DFN Package
Additional Details
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The LT3471 dual switching regulator combines two 42V, 1.3A switches with error amplifiers that can sense to ground providing boost and inverting capability. The low VCESAT bipolar switches enable the device to deliver high current outputs in a small footprint. The LT3471 switches at 1.2MHz, allowing the use of tiny, low cost and low profile inductors and capacitors. High inrush current at start-up is eliminated using the programmable soft-start function, where an external RC sets the current ramp rate. A constant frequency current mode PWM architecture results in low, predictable output noise that is easy to filter.

The LT3471 switches are rated at 42V, making the device ideal for boost converters up to ±40V as well as SEPIC and flyback designs. Each channel can generate 5V at up to 630mA from a 3.3V supply, or 5V at 510mA from four alkaline cells in a SEPIC design. The device can be configured as two boosts, a boost and inverter or two inverters.

The LT3471 is available in a low profile (0.75mm) 10-lead 3mm × 3mm DFN package.

Applications

  • Organic LED Power Supply
  • Digital Cameras
  • White LED Power Supply
  • Cellular Phones
  • Medical Diagnostic Equipment
  • Local ±5V or ±12V Supply
  • TFT-LCD Bias Supply
  • xDSL Power Supply
Part Models 2
1ku List Price Starting From $3.75

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT3471EDD#PBF
  • HTML
  • HTML
LT3471EDD#TRPBF
  • HTML
  • HTML
Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 3

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AD-PAARRAY3552R-SL

RF Front-end GaN Power Amplifier Biasing, Protection, and Control Reference Design

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AD-PAARRAY3552R-SL

RF Front-end GaN Power Amplifier Biasing, Protection, and Control Reference Design

RF Front-end GaN Power Amplifier Biasing, Protection, and Control Reference Design

Features and Benefits

  • Designed to cover full Tx signal chains with integrated MCU and user-friendly GUI for faster and easier integration
  • Supports fault event protection - overvoltage (OV), overcurrent (OC), and overtemperature (OT)
  • Supports ultrafast sub-µs GaN gate voltage switching ~ (<1 µs)
  • Supports ultrafast (<10 µs) fault event protection from detection up to GaN gate pinch-off
  • Wide range of gate bias voltages from -10 V to +10 V
  • Configurable power-up and power-down sequence

Product Detail

The AD-PAARRAY3552R-SL reference design provides control, protection, and proper biasing sequence for GaN power amplifier (PA) arrays. The design incorporates the AD3553R high-speed, dual-channel, 16-bit DAC to support the ultrafast sub-µs voltage settling time of GaN gates.

Key fault events, including overvoltage, overcurrent, and overtemperature, are effectively managed by the LTC7000, a static switch driver responsible for system fault protection.

The on-board MAX32666 ultralow-power ARM® Cortex®-M4 microprocessor provides essential debug and programming features for a comprehensive software development experience with the system. The system's firmware is built on ADI's open-source no-OS framework and includes a user-friendly graphical interface (GUI) for evaluation. Updates are easily applied through an SWD UART bootloader, streamlining prototyping.

The system can be powered by an external +48 V supply, requiring high current capabilities.

APPLICATIONS

  • 5G massive MIMOs
  • Macro base stations
Specifications
Fault Events
Fault Default Limit
Overvoltage +55 V
Overcurrent 3.5 A
Overtemperature 75°C
Output Ports
Port Name No. of ports
GaN gate ports 6
+48 V Gan drain ports 4
+5 V ports 5
Enable ports 2
Power Supply
External +48 V DC at 5 A
Operating Conditions
Temperature Range 45°C to +75°C
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DC1280A

LT3471EDD Demo Board | Dual 12 VOUT @ 300mA & -12 VOUT @ 200mA Boost/Inverter in 3 × 3 DFN

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DC1280A

LT3471EDD Demo Board | Dual 12 VOUT @ 300mA & -12 VOUT @ 200mA Boost/Inverter in 3 × 3 DFN

LT3471EDD Demo Board | Dual 12 VOUT @ 300mA & -12 VOUT @ 200mA Boost/Inverter in 3 × 3 DFN

Product Detail

Demonstration circuit 1280A is a dual output converter featuring the LT3471EDD in Boost and Inverter configurations. Both converters are powered from the same 4.5V to 10V input source. The Boost converter puts out 12V at 300mA and the Inverter -12V at 200mA. The demo circuit demonstrates small size and low component count. The LT3471 operates with inputs as high as 16V but in this demo board the input is limited by the magnitude of the Boost output. In a Boost converter the input needs to be less than the output. The DC1280A is designed so that the Inverting converter can easily be configured as a Boost. Instructions are included in the schematic. Both circuits are designed to demonstrate the soft start feature, advantages of the 1.2MHz switching frequency and the internal 42V/1.3A switches.

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SCP-LT3471-EVALZ

LT3471 Signal Chain Evaluation Board | Dual Boost/Inverting Converter

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SCP-LT3471-EVALZ

LT3471 Signal Chain Evaluation Board | Dual Boost/Inverting Converter

LT3471 Signal Chain Evaluation Board | Dual Boost/Inverting Converter

Product Detail

Demonstration circuit SCP-LT3471-EVALZ is a dual output converter featuring the LT3471EDD in boost and inverter configurations. Both converters are powered from the same 4.5V to 10V input source. The Boost converter puts out 12V at 300mA and the Inverter –12V at 200mA.

Like all boards in the Signal Chain Power series, this board is designed to be easily plugged into other SCP boards to form a complete signal chain power system, enabling fast evaluation of low power signal chains. To evaluate this board, some universal SCP hardware is required, namely:

  • SCP-INPUT-EVALZ
  • SCP-OUTPUT-EVALZ
  • SCP-1X5BKOUT-EVALZ
  • SCP-THRUBRD-EVALZ
  • SCP-FILTER-EVALZ
  • SCP-1X2BKOUT-EVALZ
  • SCP-5X1-EVALZ

 

To properly evaluate SCP series demo boards, you will need the SCP Configurator companion software. SCP Configurator can help you choose the right board and topology for your design.

Note that the Demo Manual does not cover details important to the operation and configuration regarding the LT3471. Please refer to the LT3471 data sheet for a complete description of the part.

Tools & Simulations

Tools & Simulations 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.

Reference Designs

Reference Designs 1

EVAL-CN0531-PMDZ Simplified Block Diagram

Programmable 20-Bit, Linear, Precision, Bipolar ± 5V DC Voltage Source

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CN0531

Programmable 20-Bit, Linear, Precision, Bipolar ± 5V DC Voltage Source

CN0531

Circuits from the lab

tooltip Info:Circuits from the lab
Programmable 20-Bit, Linear, Precision, Bipolar ± 5V DC Voltage Source

Features and Benefits

  • +/-5V Output Range
  • 20-Bit Signal Generation Control
  • On board precision 5V Reference
  • All Power Rails Generated Using a Single 3.3V Source
View Detailed Reference Design external link

Design & Integration Tools

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Videos

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Sep 09, 2021

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ADI's CN0531: Programmable 20-Bit Precision DC Voltage Source

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Mar 23, 2022

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Precision Narrow Bandwidth Signal Chain Solutions

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Apr 27, 2022

02:18

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