Overview

Features and Benefits

  • 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
  • 2MHz Fixed Frequency Operation
  • VIN > VOUT Operation
  • Integrated Soft-Start
  • Current Mode Control with Internal Compensation
  • Burst Mode® Operation with 9μA IQ (LTC3526L-2)
  • Low Noise PWM Operation (LTC3526LB-2)
  • Internal Synchronous Rectifier
  • Logic Controlled Shutdown (IQ < 1μA)
  • Anti-Ring Control
  • Low Profile (2mm × 2mm × 0.75mm) 6-Lead DFN Package

Product Details

The LTC3526L-2/LTC3526LB-2 are synchronous, fixed frequency step-up DC/DC converters with output disconnect. Synchronous rectification enables high efficiency in the low profile 2mm × 2mm DFN package. Battery life in single AA/AAA powered products is extended further with a 680mV start-up voltage and operation down to 500mV once started.

A switching frequency of 2MHz 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 LTC3526L-2 features Burst Mode operation at light load conditions allowing it to maintain high efficiency over a wide range of load. The LTC3526LB-2 features fixed frequency operation for low noise applications. 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 LTC3526L-2/LTC3526LB-2 are housed in a 2mm × 2mm × 0.75mm DFN package.

Startup Voltage Frequency Burst Mode Notes
LTC3526 1V 1MHz Yes Not Recommended For New Designs
LTC3526B 1V 1MHz No Not Recommended For New Designs
LTC3526-2 1V 2MHz Yes Not Recommended For New Designs
LTC3526B-2 1V 2MHz No Not Recommended For New Designs
LTC3526L 0.85V 1MHz Yes
LTC3526LB 0.85V 1MHz No
LTC3526L-2 0.85V 2MHz Yes
LTC3526LB-2 0.85V 2MHz No

Applications

  • Medical Instruments
  • Noise Canceling Headphones
  • Wireless Mice
  • Bluetooth Headsets

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (2)

Tools & Simulations

LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

LTspice

Models for the following parts are available in LTspice:

LTC3526
LTC3526-2
LTC3526B
LTC3526B-2
LTC3526L
LTC3526L-2
LTC3526LB
LTC3526LB-2

Product Recommendations

LTC3526L-2 Companion Parts

Recommended Related Parts

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

Discussions

LTC3526L-2 Discussions

RE: ADALM1000 python Linux libsmu 2019
3 hour(s) ago in Virtual Classroom for ADI University Program
RE: AD9375 Initial Calibrations
13 hour(s) ago in Design Support AD9371/AD9375
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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 Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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Evaluation Boards Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.