LTC3535 - Dual Channel 550mA 1MHz Synchronous Step-Up DC/DC Converter

Features

  • Two Independent Step-Up Converters
  • Each Channel Delivers 3.3V at 100mA from a Single Alkaline/NiMH Cell or 3.3V at 200mA from Two Cells
  • VIN Start-Up Voltage: 680mV
  • 1.5V to 5.25V VOUT Range
  • Up to 94% Efficiency
  • Output Disconnect
  • 1MHz Fixed Frequency Operation
  • VIN > VOUT Operation
  • Integrated Soft-Start
  • Current Mode Control with Internal Compensation
  • Burst Mode® Operation with 9μA IQ Each Channel
  • Internal Synchronous Rectifier
  • Logic Controlled Shutdown (IQ < 1μA)
  • Anti-Ring Control
  • Low Profile (3mm × 3mm × 0.75mm) 12-Lead DFN Package

Typical Application

LTC3535 Typical Application
LTC3535 Typical Application

Description

The LTC®3535 is a dual channel, synchronous, fixed frequency step-up DC/DC converter with output disconnect. Extended battery life in single AA/AAA powered products is realized with a 680mV start-up voltage and operation down to 500mV once started.

A switching frequency of 1MHz 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 LTC3535 features Burst Mode operation at light load conditions allowing it to maintain high efficiency over a wide range of load. Anti-ring circuitry reduces EMI by damping the inductor in discontinuous mode. Additional features include a low shutdown current of under 1μA and thermal shutdown.

The LTC3535 is housed in a 3mm × 3mm × 0.75mm DFN package.

Packaging

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

Part Number Package Code Temp Package
Drawing
RoHS
LTC3535EDD#PBF 3x3 DFN-12 DD E 05-08-1725 Yes
LTC3535EDD#TRPBF 3x3 DFN-12 DD E 05-08-1725 Yes


LTC3535 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
LTC3535EDD#PBF 3x3 DFN-12 E $4.22 $2.95 Yes
LTC3535EDD#TRPBF 3x3 DFN-12 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
DC1483A LTC3535EDD Demo Board | Dual Channel 550mA 1MHz Synchronous Step-Up DC/DC Converter $75.00
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Click here to view our complete list of demo boards

Applications

  • Medical Instruments
  • Noise Canceling Headphones
  • Energy Harvesting
  • Bluetooth Headsets

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Design Tools

LTspice

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LTC3535

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