LTC3526L/LTC3526LB - 550mA 1MHz Synchronous Step-Up DC/DC Converters in 2mm × 2mm DFN

Features

  • 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
  • 1MHz Fixed Frequency Operation
  • VIN > VOUT Operation
  • Integrated Soft-Start
  • Current Mode Control with Internal Compensation
  • Burst Mode® Operation with 9μA IQ (LTC3526L)
  • Low Noise PWM Operation (LT3526LB)
  • Internal Synchronous Rectifier
  • Logic Controlled Shutdown (IQ < 1μA)
  • Anti-Ring Control
  • Low Profile (2mm × 2mm × 0.75mm) DFN-6 Package

Typical Application

LTC3526L Typical Application
LTC3526L Typical Application

Description

The LTC®3526L/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  

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LTC3526LBEDC#PBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3526LBEDC#TRMPBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3526LBEDC#TRPBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3526LEDC#PBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3526LEDC#TRMPBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3526LEDC#TRPBF 2x2 DFN-6 DC6 E 05-08-1703 Yes


LTC3526L Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTC3526LBEDC#PBF 2x2 DFN-6 E $2.64 Yes
LTC3526LBEDC#TRMPBF 2x2 DFN-6 E $2.64 $1.90 Yes
LTC3526LBEDC#TRPBF 2x2 DFN-6 E $2.64 $1.85 Yes
LTC3526LEDC#PBF 2x2 DFN-6 E $2.64 Yes
LTC3526LEDC#TRMPBF 2x2 DFN-6 E $2.64 $1.90 Yes
LTC3526LEDC#TRPBF 2x2 DFN-6 E $2.64 $1.85 Yes
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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 Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC1053A-E LTC3526LEDC Demo Board: 1MHz, 0.8V ≤ VIN ≤ 5.5V, VOUT = 1.8V/3.3V/5V @ 100mA $75.00
DC1053A-F LTC3526LBEDC Demo Board | 1MHz, 0.8V ≤ VIN ≤ 5.5V, VOUT = 1.8V/3.3V/5V @ 100mA $75.00
Buy Now
Click here to view our complete list of demo boards

Applications

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

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

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Models for the following parts are available in LTspice:
LTC3526
LTC3526-2
LTC3526B
LTC3526B-2
LTC3526L
LTC3526L-2
LTC3526LB
LTC3526LB-2

Technical Support