Power Management Switching Regulator Inverting Regulators
Power Management Switching Regulator LCD/CCD/OLED Bias
 Power Management Switching Regulator Step-Up (Boost) Regulators Internal Power Switch Boost
 Power Management PMIC & Multifunction Multitopology DC/DC

LT3587 - High Voltage Monolithic Inverter and Dual Boost

Features

  • Ideal for CCD, LCD, LED Backlight and OLED Applications
  • Easy Generation of 15V (50mA), –8V (100mA) and 20V (20mA) from a Li-Ion Cell
  • VIN Range: 2.5V to 6V
  • Wide Output Ranges: Up to 32V for the Boosts and Up to –32V for the Inverter
  • Output Disconnect for the Boost Channels
  • Boost3 Allows Voltage Programming and/or Current Programming for a ‘One Wire Current Source’
  • Overload Fault Protection with Fault I/O Pin Indicator
  • Combined Soft-Start and Enable Pins
  • Small 20-Pin 3mm × 3mm QFN Package

Typical Application

LT3587 Typical Application
LT3587 Typical Application

Description

The LT3587 provides a one-chip solution for applications requiring two positive and one negative high voltage supplies.The LT3587 input voltage range of 2.5V to 6V makes it ideal for various battery-powered systems.

A single resistor programs each of the three output voltage levels and the output current of Boost3. The intelligent softstart allows for sequential soft-start of the Boost1 output followed by the negative output with a single capacitor. Internal sequencing circuitry also disables the inverter until the Boost1 output has reached 87% of its final value.

The LT3587 integrates all the power switches, soft-start, and output-disconnect circuits into a small 3mm x 3mm QFN package. This high level of integration combined with small external components makes the LT3587 ideal for space constrained 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
LT3587EUD#PBF 3x3 QFN-20 UD E 05-08-1720 Yes
LT3587EUD#TRPBF 3x3 QFN-20 UD E 05-08-1720 Yes


LT3587 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
LT3587EUD#PBF 3x3 QFN-20 E $4.22 $2.95 Yes
LT3587EUD#TRPBF 3x3 QFN-20 E $3.01 Yes
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* 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
DC1348A LT3587EUD DEMO BOARD | High Voltage Monolithic Inverter and Dual Boost $150.00
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Click here to view our complete list of demo boards

Applications

  • Digital Still and Video Cameras
  • Scanner and Display Systems
  • PDA, Cellular Phones and Handheld Computers
  • LED Backlight and OLED Display Drivers
  • CCD Imager Bias
  • General High Voltage Supply 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

Models for the following parts are available in LTspice:
LT3587

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