LTC3526
PRODUCTION500mA 1MHz Synchronous Step-Up DC/DC Converters in 2mm × 2mm DFN
- Part Models
- 4
- 1ku List Price
- Starting From $2.69
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
- 1.6V 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
- Automatic Burst Mode® Operation with 9μA Quiescent Current (LTC3526)
- Low Noise PWM Operation (LTC3526B)
- Internal Synchronous Rectifier
- Logic Controlled Shutdown (IQ < 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
Documentation
Data Sheet 1
Brochure 1
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) | ||
| LTC3526BEDC#TRPBF | 6-Lead DFN (2mm x 2mm w/ EP) | ||
| LTC3526EDC#TRMPBF | 6-Lead DFN (2mm x 2mm w/ EP) | ||
| LTC3526EDC#TRPBF | 6-Lead DFN (2mm x 2mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
|
LTC3526L LTC3526LB |
550mA 1MHz Synchronous Step-Up DC/DC Converters in 2mm × 2mm DFN |
Tools & Simulations
LTspice 2
- LTC3526B Demo Circuit - 500mA 1MHz Synchronous Boost Converter (1-5V to 3.3V @ 100mA)
- LTC3526 Demo Circuit - 500mA 1MHz Synchronous Boost Converter (1-5V to 3.3V @ 100mA)
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.