LT3494
PRODUCTIONMicropower Low Noise Boost Converters with Output Disconnect
- Part Models
- 4
- 1ku List Price
- Starting From $2.25
Overview
- Low Quiescent Current
- 65µA in Active Mode
- 1µA in Shutdown Mode
- Switching Frequency is Non-Audible Over Entire Load Range
- Integrated Power NPN:
- 350mA Current Limit (LT3494A)
- 180mA Current Limit (LT3494)
- Integrated Schottky Diode
- Integrated Output Disconnect
- Integrated Output Dimming
- Wide Input Range: 2.3V to 16V
- Wide Output Range: Up to 40V
- Tiny 8-Lead 3mm × 2mm DFN Package
The LT3494/LT3494A are low noise boost converters with integrated power switch, Schottky diode and output disconnect circuitry. The parts use a novel* control technique resulting in low output voltage ripple as well as high efficiency over a wide load current range. This technique guarantees that the switching frequency stays above the audio band for the entire load range. The parts feature a high performance NPN power switch with a 350mA and 180mA current limit for the LT3494A and LT3494 respectively. The quiescent current is a low 65µA, which is further reduced to less than 1µA in shutdown. The internal disconnect circuitry allows the output voltage to be isolated from the input during shutdown. An auxiliary reference input (CTRL pin) overrides the internal 1.225V feedback reference with any lower value allowing full control of the output voltage during operation. The LT3494/LT3494A are available in a tiny 8-lead 3mm × 2mm DFN package.
Applications
- OLED Power
- Low Noise Power
- MP3 Players
Documentation
Data Sheet 1
User Guide 1
Technical Articles 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 |
|---|---|---|---|
| LT3494AEDDB#TRMPBF | 8-Lead DFN (3mm x 2mm w/ EP) | ||
| LT3494AEDDB#TRPBF | 8-Lead DFN (3mm x 2mm w/ EP) | ||
| LT3494EDDB#TRMPBF | 8-Lead DFN (3mm x 2mm w/ EP) | ||
| LT3494EDDB#TRPBF | 8-Lead DFN (3mm x 2mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
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 |
Tools & Simulations
LTspice 2
- LT3494 Demo Circuit - µPower Low Noise Boost Converter (3.6V to 15V @ 17mA)
- LT3494A Demo Circuit - µPower Low Noise Boost Converter (3.6V to 15V @ 27mA)
Models for the following parts are available in LTspice:
- LT3494
- LT3494A
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
Reference Designs
24-Bit Data Acquisition System for IEPE Sensors
Part Used
Resources
Design & Integration Tools
Videos
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Easily Connect Sensors with ADI's Robust Industrial Signal Chains
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CN0549 - CbM Development Platform