LTC3526-2

PRODUCTION

500mA 2MHz Synchronous Step-Up DC/DC Converter in 2mm × 2mm DFN

Data Sheet Product Selection Table
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Overview

  • Delivers 3.3V at 100mA from a Single Alkaline/NiMH Cell or 3.3V at 200mA from Two Cells
  • VIN Start-Up Voltage: 850mV
  • VIN Operating Range: 0.5V to 5V
  • 1.6V 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 Quiescent Current (LTC3526-2)
  • Low Noise PWM Operation (LTC3526B-2)
  • Internal Synchronous Rectifier
  • Logic Controlled Shutdown (IQ < 1μA)
  • Anti-Ringing Control
  • Low Profile (2mm × 2mm × 0.75mm) DFN-6 Package

The LTC3526-2/LTC3526B-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 an 850mV 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 LTC3526-2 features Burst Mode operation at light load conditions, while the LTC3526B-2 features continuous switching. Anti-ring circuitry eliminates EMI concerns by damping the inductor in discontinuous mode. Additional features include a low shutdown current of under 1μA and thermal shutdown.

The LTC3526-2/LTC3526B-2 are housed in a 6-pin 2mm × 2mm × 0.75mm DFN package.

For new designs, we recommend the LTC3526L-2/ LTC3526LB-2.

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
  • Flash-Based MP3 Players
  • Noise Canceling Headphones
  • Wireless Mice
  • Bluetooth Headsets
LTC3526-2
500mA 2MHz Synchronous Step-Up DC/DC Converter in 2mm × 2mm DFN
LTC3526-2 Efficiency and Power Loss vs Load Current Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

Data Sheet

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
LTC3526L-2
RECOMMENDED FOR NEW DESIGNS 550mA 2MHz Synchronous Step-Up DC/DC Converters in 2mm × 2mm DFN
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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

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

Signal Chain Designer

Signal Chain Designer is a web-based tool designed to create and simulate complex precision signal chains. See your circuit’s performance before you commit to your PCB: transfer function, noise, power consumption, input range, and DC error. Quickly experiment with different parts and architectures. Signal chains can be exported to LTspice for further analysis.

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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.

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