LTC3526

PRODUCTION

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

Analog Devices LTC3526 Product Info

10 February 2026 9

Features

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

Part details & applications

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.

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