LTC3526

PRODUCTION

500mA 1MHz Synchronous Step-Up DC/DC Converters in 2mm × 2mm DFN

Data Sheet (Rev. E) Product Selection Table

Part Models: 4
1ku List Price: Starting From $2.12

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Part Details

Delivers 3.3V at 100mA from a Single Alkaline/NiMH Cell or 3.3V at 200mA from Two Cells
V_IN Start-Up Voltage: 850mV
1.6V to 5.25V V_OUT Range
Up to 94% Efficiency
Output Disconnect
1MHz Fixed Frequency Operation
V_IN> V_OUTOperation
Integrated Soft-Start

Current Mode Control with Internal Compensation
Automatic Burst Mode^® Operation with 9μA Quiescent Current (LTC3526)
Low Noise PWM Operation (LTC3526B)
Internal Synchronous Rectifier
Logic Controlled Shutdown (I_Q < 1μA)
Anti-Ringing Control
Low Profile (2mm × 2mm × 0.75mm) DFN Package

The LTC3526/LTC3526B 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 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 LTC3526 features automatic Burst Mode operation at light load conditions, while the LTC3526B features continuous switching at light loads. Anti-ringing control circuitry also reduces EMI concerns by damping the inductor in discontinuous mode. Additional features include a low shutdown current of under 1μA and thermal shutdown.

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

For new designs, we recommend the LTC3526L/LTC3526LB.


	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

Part Models: 4
1ku List Price: Starting From $2.12

Documentation

Data Sheet 1

LTC3526: 500mA 1MHz Synchronous Step-Up DC/DC Converters in 2mm × 2mm DFN Data Sheet (Rev.E) 09/29/2010

Reliability Data 1

R415 Reliability Data 03/23/2018

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. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC3526BEDC#TRMPBF	6-Lead DFN (2mm x 2mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3526BEDC#TRPBF	6-Lead DFN (2mm x 2mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3526EDC#TRMPBF	6-Lead DFN (2mm x 2mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3526EDC#TRPBF	6-Lead DFN (2mm x 2mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Hardware Ecosystem

Parts	Product Life Cycle	Description
LTC3526L LTC3526LB		550mA 1MHz Synchronous Step-Up DC/DC Converters in 2mm × 2mm DFN

Tools & Simulations

LTspice 3

Models for the following parts are available in LTspice:

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

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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