LT3483

PRODUCTION

Inverting Micropower DC/DC Converters with Schottky

Data Sheet Product Selection Table

Part Models: 12
1ku List Price: Starting From $2.75

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Overview

Internal 40V Schottky Diode
One Resistor Feedback (Other Resistor Inside)
Internal 40V, 200mA/400mA Power Switch
Generates Regulated Negative Outputs to –38V
Low Quiescent Current:

40μA in Active Mode
<1μA in Shutdown Mode

Low V_CESAT Switch: 200mV at 150mA
Wide Input Range: 2.5V to 16V
Uses Small Surface Mount Components
Output Short-Circuit Protected
Available in a 6-Lead SOT-23 (LT3483 Only) and Low Profile 8-Lead DFN (2mm × 2mm × 0.75mm) Packages

The LT3483/LT3483A are micropower inverting DC/DC converters with integrated Schottky and one resistor feedback. The small package size, high level of integration and use of tiny surface mount components yield a solution size as small as 40mm². The devices feature a quiescent current of only 40μA at no load, which further reduces to 0.1μA in shutdown. A current limited, fixed off-time control scheme conserves operating current, resulting in high efficiency over a broad range of load current. A precisely trimmed 10μA feedback current enables one resistor feedback and virtually eliminates feedback loading of the output. The 40V switch enables voltage outputs up to –38V to be generated without the use of costly transformers. The LT3483/LT3483A’s low 300ns off-time permits the use of tiny low profile inductors and capacitors to minimize footprint and cost in space-conscious portable applications.

Applications

LCD Bias
Handheld Computers
Battery Backup
Digital Cameras
OLED Bias

Part Models: 12
1ku List Price: Starting From $2.75

Documentation

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
LT3483AEDC#TRMPBF	8-Lead DFN (2mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3483AEDC#TRPBF	8-Lead DFN (2mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3483AIDC#TRMPBF	8-Lead DFN (2mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3483AIDC#TRPBF	8-Lead DFN (2mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3483EDC#TRMPBF	8-Lead DFN (2mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3483EDC#TRPBF	8-Lead DFN (2mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3483ES6#TRMPBF	6-Lead TSOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3483ES6#TRPBF	6-Lead TSOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3483IDC#TRMPBF	8-Lead DFN (2mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3483IDC#TRPBF	8-Lead DFN (2mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3483IS6#TRMPBF	6-Lead TSOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3483IS6#TRPBF	6-Lead TSOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

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

Software Resources

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Tools & Simulations

LTspice 1

LT3483 Demo Circuit - 170mA, Current Limited Constant Off-time, Inverting µPower Converter (3.3V to -8V @ 25mA)

Models for the following parts are available in LTspice:

LT3483
LT3483A

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

LT3483 Signal Chain Evaluation Board | Inverting μPower DC/DC Converter

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Product Details

Demonstration circuit SCP-LT3483-EVALZ is an inverting converter featuring the LT3483ES6. The converter generates –15V at 8mA to 40mA from a 2.7–12V input using a dual coupled inductor in an inverting flyback topology.

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 to-pology for your design.

Note that the Demo Manual does not cover details important to the operation and configuration regarding the LT3483 buck regulator. Please refer to the LT3483 data sheet for a complete description of the part.