LTC3586-2/LTC3586-3 - High Efficiency USB Power Manager with Boost, Buck-Boost and Dual Bucks


Power Manager

  • High Efficiency Switching PowerPath™ Controller with Bat-Track™ Adaptive Output Control and Instant-On Operation
  • Programmable USB or Wall Current Limit (100mA/500mA/1A)
  • Full Featured Li-Ion/Polymer Battery Charger with Float Voltage of 4.2V (LTC3586-2) or 4.1V (LTC3586-3) with 1.5A Maximum Charge Current
  • Internal 180mΩ Ideal Diode Plus External Ideal Diode Controller Powers Load in Battery Mode
  • <30μA No-Load Quiescent Current when Powered from BAT


  • Dual High Efficiency Buck DC/DCs (400mA IOUT)
  • High Efficiency Buck-Boost DC/DC (1A IOUT)
  • High Efficiency Boost DC/DC (800mA IOUT)
  • DC/DC FAULT Output
  • Compact (4mm × 6mm) 38-Pin QFN Package

Typical Application

LTC3586-2 Typical Application
LTC3586-2 Typical Application


The LTC®3586-2/LTC3586-3 are highly integrated power management and battery charger ICs for Li-Ion/Polymer battery applications. They include a high efficiency current limited switching PowerPath manager with automatic load prioritization, battery charger, ideal diode, and four synchronous switching regulators (two bucks, one buckboost and one boost). Designed specifically for USB applications, the LTC3586-2/LTC3586-3’s switching power manager automatically limits input current to a maximum of either 100mA or 500mA for USB applications or 1A for adapter-powered applications.

Unlike linear chargers, the LTC3586-2/LTC3586-3 switching architecture transmits nearly all of the power available from the USB port to the load with minimal loss and heat which eases thermal constraints in small places. The two buck regulators can provide up to 400mA each, the buck-boost can deliver 1A, and the boost delivers at least 800mA.

The LTC3586-2/LTC3586-3 are available in a low profile (0.75mm) 38-pin 4mm × 6mm QFN package.

OptionsFloat Voltage (V)Fault Pin FunctionalityBoost Overvoltage Threshold (V)Boost Overvoltage Hysteresis
LTC3586 4.2V Bi-Directional with Latch 5.3V 300mV
LTC3586-1 4.1V Bi-Directional with Latch 5.3V 300mV
LTC3586-2 4.2V Output Only, No Latch 5.5V 100mV
LTC3586-3 4.1V Output Only, No Latch 5.5V 100mV


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
LTC3586EUFE-2#PBF 4x6 QFN-38 UFE E 05-08-1750 Yes
LTC3586EUFE-2#TRPBF 4x6 QFN-38 UFE E 05-08-1750 Yes
LTC3586EUFE-3#PBF 4x6 QFN-38 UFE E 05-08-1750 Yes
LTC3586EUFE-3#TRPBF 4x6 QFN-38 UFE E 05-08-1750 Yes

LTC3586-2 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
LTC3586EUFE-2#PBF 4x6 QFN-38 E $7.57 $5.30 Yes
LTC3586EUFE-2#TRPBF 4x6 QFN-38 E $5.36 Yes
LTC3586EUFE-3#PBF 4x6 QFN-38 E $7.57 $5.30 Yes
LTC3586EUFE-3#TRPBF 4x6 QFN-38 E $5.36 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.

Click here to view our complete list of demo boards


  • Portable Medical/Industrial Devices
  • Other USB-Based Handheld Products

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Design Tools

Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:

  • LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
  • LTpowerCAD - A complete power supply selection, synthesis and design tool
  • LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
  • PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
  • Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
  • LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
  • And More!

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