LTC3526L
LTC3526LB

RECOMMENDED FOR NEW DESIGNS

550mA 1MHz Synchronous Step-Up DC/DC Converters in 2mm × 2mm DFN

Part Models: 4
1ku List Price: Starting From $2.24

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Overview

Delivers 3.3V at 100mA from a Single Alkaline/NiMH Cell or 3.3V at 200mA from Two Cells
V_IN Start-Up Voltage: 680mV
1.5V to 5.25V V_OUT Range
Up to 94% Efficiency
Output Disconnect
1MHz Fixed Frequency Operation
V_IN > V_OUT Operation
Integrated Soft-Start

Current Mode Control with Internal Compensation
Burst Mode^® Operation with 9μA I_Q (LTC3526L)
Low Noise PWM Operation (LT3526LB)
Internal Synchronous Rectifier
Logic Controlled Shutdown (I_Q < 1μA)
Anti-Ring Control
Low Profile (2mm × 2mm × 0.75mm) DFN-6 Package

The LTC3526L/LTC3526LB 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 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 LTC3526L features Burst Mode operation at light load conditions allowing it to maintain high efficiency over a wide range of load. The LTC3526LB 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/LTC3526LB 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

Part Models: 4
1ku List Price: Starting From $2.24

Documentation

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
LTC3526LBEDC#TRMPBF	6-Lead DFN (2mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3526LBEDC#TRPBF	6-Lead DFN (2mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3526LEDC#TRMPBF	6-Lead DFN (2mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3526LEDC#TRPBF	6-Lead DFN (2mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

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

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Protection Switches & Controllers 1
LTC4365	RECOMMENDED FOR NEW DESIGNS	Overvoltage, Undervoltage and Reverse Supply Protection Controller
Supervisory Circuits & Reset ICs 1
LTC2935	PRODUCTION	Ultra-Low Power Supervisor with Power-Fail Output, Selectable Thresholds

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

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.

Evaluation Kits

LTC3526LBEDC Demo Board | 1MHz, 0.8V ≤ VIN ≤ 5.5V, VOUT = 1.8V/3.3V/5V @ 100mA

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Product Details

Demonstration circuits 1053A-E through 1053A-H exercise the LTC3526L family of high efficiency synchronous boost converters, and are capable of operating with an input voltage range from 0.8V to 5.5V. The 2 × 2 mm DFN thermally enhanced package, high switching frequency (1MHz or 2MHz) and 550mA internal power switches provide a very tiny solution. The LTC3526L family also features output disconnect, and the input voltage can be greater or less than the output voltage. DC1053A-E features the LTC3526L (Burst mode operation) and the DC1053A-F features the LTC3526LB (Burst mode defeated). Both have a 1MHz switching frequency and use a 4.7µH inductor.