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 $2.84
Overview
- 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
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
Documentation
Data Sheet 1
User Guide 1
Design Note 1
Product Selector Card 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 |
|---|---|---|---|
| LTC3526LBEDC#TRMPBF | 6-Lead DFN (2mm x 2mm w/ EP) | ||
| LTC3526LBEDC#TRPBF | 6-Lead DFN (2mm x 2mm w/ EP) | ||
| LTC3526LEDC#TRMPBF | 6-Lead DFN (2mm x 2mm w/ EP) | ||
| LTC3526LEDC#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 |
|---|---|---|
| Overvoltage & Overcurrent Protectors 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
- LTC3526L Demo Circuit - High Efficiency Boost Converter (1-5V to 3.3V @ 100mA)
- LTC3526LB Demo Circuit - High Efficiency 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.
