Power Management Switching Regulator Step-Up (Boost) Regulators Micropower Boost
Power Management Switching Regulator Step-Up (Boost) Regulators Internal Power Switch Boost

LTC3539/LTC3539-2 - 2A, 1MHz/2MHz Synchronous Step-Up DC/DC Converters

Features

  • Delivers 3.3V at 900mA From 2 Alkaline/NiMH Cells
  • Delivers 5V at 900mA From a Lithium-Polymer Battery
  • VIN Start-Up Voltage: 700mV
  • 1.5V to 5.25V VOUT Range
  • Up to 94% Efficiency
  • VIN > VOUT Operation
  • ±1.5% Feedback Voltage Tolerance
  • 1MHz (LTC3539) or 2MHz (LTC3539-2) Fixed Frequency Operation
  • Output Disconnect
  • Selectable Burst Mode® or PWM Operation
  • 10μA Quiescent Current
  • Logic Controlled Shutdown: <1μA
  • Requires Only 6 External Components
  • Low Profile (2mm × 3mm × 0.75mm) DFN Package

Typical Application

LTC3539 Typical Application
LTC3539 Typical Application

Description

The LTC®3539/LTC3539-2 are synchronous, 2A step-up DC/DC converters with output disconnect. Synchronous rectification enables high efficiency in the low profile 2mm × 3mm DFN package. Battery life is extended with a 700mV start-up voltage and operation down to 500mV once started.

A switching frequency of 1MHz (LTC3539) or 2MHz (LTC3539-2) minimizes solution footprint by allowing the use of tiny, low profile inductors and ceramic capacitors. The current mode PWM design is internally compensated, reducing external parts count. The LTC3539/LTC3539-2 feature a pin-enabled automatic Burst Mode operation at light load conditions. Anti-ring circuitry reduces EMI by damping the inductor in discontinuous mode. Additional features include a low shutdown current of under 1μA and thermal overload protection.

The LTC3539/LTC3539-2 are offered in a 2mm × 3mm × 0.75mm DFN package.

Packaging

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

DFN-8

LTC3539 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTC3539EDCB#PBF DFN 8 E $3.57 View
LTC3539EDCB#TRMPBF DFN 8 E $3.57 $2.55 View
LTC3539EDCB#TRPBF DFN 8 E $3.57 $2.50 View
LTC3539EDCB-2#PBF DFN 8 E $3.57 View
LTC3539EDCB-2#TRMPBF DFN 8 E $3.57 $2.55 View
LTC3539EDCB-2#TRPBF DFN 8 E $3.57 $2.50 View
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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
DC1260A-A LTC3539EDCB DEMO BOARD | 2A, 1MHz Synchronous Step $100.00
DC1260A-B LTC3539EDCB-2 DEMO BOARD | 2A, 2MHz Synchronous St $100.00
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Click here to view our complete list of demo boards

Applications

  • Medical Instruments
  • Portable Bar Code Scanners
  • Noise Canceling Headphones
  • Portable GPS Navigation
  • Handheld PCs

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Related models available in LTspice IV
LTC3539-2
LTC3539

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