LT3482

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LT3482

90V Boost DC/DC Converter with APD Bias Current Monitor

PRODUCTION

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Part Models 4

1ku List Price Starting From $4.13

Features

High Output Voltage: Up to 90V
Integrated Schottky Diodes
48V, 280mA Internal Switch
High Side APD Current Monitor
Adjustable Switching Frequency: 650kHz or 1.1MHz
Wide V_IN Range: 2.5V to 16V
Surface Mount Components
Low Shutdown Current: <1µA
Soft-Start
Internal Compensation
CTRL Pin Allows Output Adjustment with No Polarity Inversion
3mm × 3mm 16-Lead QFN Package

Additional Details

The LT3482 is a fixed frequency current mode step-up DC/DC converter with voltage doubler designed to bias avalanche photodiodes (APDs) in optical receivers. It can provide up to 90V output. The LT3482 features high side APD bias current monitoring with better than 10% relative accuracy over the entire temperature range. The integrated power switch, Schottky diodes and APD bias current monitor allow a small converter footprint and low solution cost. Constant switching frequency results in predictable output noise that is easy to filter. The inductor-based topology ensures an input free from switching noise. An integrated high side current monitor produces a current proportional to APD bias current with better than 10% relative accuracy over four decades of dynamic range in the input range of 250nA to 2.5mA. This APD bias current can be used as a reference to provide a digitally programmed output voltage via the CTRL pin. The LT3482 is available in the tiny footprint (3mm × 3mm) 16-lead QFN package.

Applications

APD Bias
PIN Diode Bias
Optical Receivers and Modules
Fiber Optic Network Equipment

View All Documentation

Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

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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 4

1ku List Price Starting From $4.13

Technical Documents 4

LT3482: 90V Boost DC/DC Converter with APD Bias Current Monitor Data Sheet 11/21/2007

R530 Reliability Data 03/26/2018

DC975A - Demo Manual 09/24/2009

DN447 - A Complete Compact APD Bias Solution for a 10Gbits/s GPON System 07/14/2008

Design Resources 4

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
LT3482EUD#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LT3482EUD#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LT3482IUD#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LT3482IUD#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LT3482EUD#PBF
Pin/Package Drawing
16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LT3482EUD#TRPBF
Pin/Package Drawing
16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LT3482IUD#PBF
Pin/Package Drawing
16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LT3482IUD#TRPBF
Pin/Package Drawing
16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

DC975A

LT3482EUD Demo Board | 3V ≤ VIN ≤ 12V, VOUT = 80V @ 2mA

LT3482EUD Demo Board | 3V ≤ VIN ≤ 12V, VOUT = 80V @ 2mA

Download

DC975A

LT3482EUD Demo Board | 3V ≤ VIN ≤ 12V, VOUT = 80V @ 2mA

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Product Detail

Demonstration circuit 975A is a DC/DC Converter featuring the LT3482 in a 3mm x 3mm QFN package and trageting APD Bias applications. This demo circuit is designed to convert a 3V-12V source to 80V at 2mA.

Resources

PDF

DC975A - Schematic

24.00K

PDF

DC975A - Demo Manual

787.00K

ZIP

DC975A - Design File

573.00K

DC975A

LT3482EUD Demo Board | 3V ≤ VIN ≤ 12V, VOUT = 80V @ 2mA

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.