LT3483 - Inverting Micropower DC/DC Converters with Schottky

Features

  • 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 VCESAT 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
Designed for Automotive and Transportation Applications
AEC-Q100 data available for specific packages


Typical Application

LT3483 Typical Application
LT3483 Typical Application

Description

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.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LT3483AEDC#PBF 2x2 DFN-8 DC8 E 05-08-1719 Yes
LT3483AEDC#TRMPBF 2x2 DFN-8 DC8 E 05-08-1719 Yes
LT3483AEDC#TRPBF 2x2 DFN-8 DC8 E 05-08-1719 Yes
LT3483AIDC#PBF 2x2 DFN-8 DC8 I 05-08-1719 Yes
LT3483AIDC#TRMPBF 2x2 DFN-8 DC8 I 05-08-1719 Yes
LT3483AIDC#TRPBF 2x2 DFN-8 DC8 I 05-08-1719 Yes
LT3483EDC#PBF 2x2 DFN-8 DC8 E 05-08-1719 Yes
LT3483EDC#TRMPBF 2x2 DFN-8 DC8 E 05-08-1719 Yes
LT3483EDC#TRPBF 2x2 DFN-8 DC8 E 05-08-1719 Yes
LT3483ES6#TRMPBF SOT-23 S6 E 05-08-1636 Yes
LT3483ES6#TRPBF SOT-23 S6 E 05-08-1636 Yes
LT3483IDC#PBF 2x2 DFN-8 DC8 I 05-08-1719 Yes
LT3483IDC#TRMPBF 2x2 DFN-8 DC8 I 05-08-1719 Yes
LT3483IDC#TRPBF 2x2 DFN-8 DC8 I 05-08-1719 Yes
LT3483IS6#PBF SOT-23 S6 I 05-08-1636 Yes
LT3483IS6#TRMPBF SOT-23 S6 I 05-08-1636 Yes
LT3483IS6#TRPBF SOT-23 S6 I 05-08-1636 Yes


LT3483 Package Drawing
LT3483 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LT3483AEDC#PBF 2x2 DFN-8 E $3.02 Yes
LT3483AEDC#TRMPBF 2x2 DFN-8 E $3.02 $2.16 Yes
LT3483AEDC#TRPBF 2x2 DFN-8 E $3.02 $2.11 Yes
LT3483AIDC#PBF 2x2 DFN-8 I $3.47 Yes
LT3483AIDC#TRMPBF 2x2 DFN-8 I $3.47 $2.48 Yes
LT3483AIDC#TRPBF 2x2 DFN-8 I $3.47 $2.43 Yes
LT3483EDC#PBF 2x2 DFN-8 E $2.50 Yes
LT3483EDC#TRMPBF 2x2 DFN-8 E $2.50 $2.13 Yes
LT3483EDC#TRPBF 2x2 DFN-8 E $2.50 $2.11 Yes
LT3483ES6#TRMPBF SOT-23 E $2.50 $2.13 Yes
LT3483ES6#TRPBF SOT-23 E $2.50 $2.11 Yes
LT3483IDC#PBF 2x2 DFN-8 I $3.47 Yes
LT3483IDC#TRMPBF 2x2 DFN-8 I $3.47 $2.48 Yes
LT3483IDC#TRPBF 2x2 DFN-8 I $3.47 $2.43 Yes
LT3483IS6#PBF SOT-23 I $3.47 Yes
LT3483IS6#TRMPBF SOT-23 I $3.47 $2.48 Yes
LT3483IS6#TRPBF SOT-23 I $3.47 $2.43 Yes
Buy NowRequest Samples
* The USA 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 Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC801A LT3483ES6 | Inverting DC/DC Converter, Vin= 2.7V-12V, Vout= -15V, Vin = 2.7V-4.2V, Vout= -8V, Iout = 8-40mA*, *See Vin Table $75.00
Buy Now
Click here to view our complete list of demo boards

Designed for Automotive and Transportation Applications

AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LT3483AIDC#PBF 2x2 DFN-8 I $3.47 Yes
LT3483AIDC#TRMPBF 2x2 DFN-8 I $3.47 $2.48 Yes
LT3483AIDC#TRPBF 2x2 DFN-8 I $3.47 $2.43 Yes
LT3483IDC#PBF 2x2 DFN-8 I $3.47 Yes
LT3483IDC#TRMPBF 2x2 DFN-8 I $3.47 $2.48 Yes
LT3483IDC#TRPBF 2x2 DFN-8 I $3.47 $2.43 Yes
LT3483IS6#PBF SOT-23 I $3.47 Yes
LT3483IS6#TRMPBF SOT-23 I $3.47 $2.48 Yes
LT3483IS6#TRPBF SOT-23 I $3.47 $2.43 Yes
Buy NowRequest Samples
* The USA 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 Linear Technology sales office or authorized distributor.

Applications

  • LCD Bias
  • Handheld Computers
  • Battery Backup
  • Digital Cameras
  • OLED Bias

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
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To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

Models for the following parts are available in LTspice:
LT3483
LT3483A

Technical Support