LTC3453
LTC3453
PRODUCTIONSynchronous Buck-Boost High Power White LED Driver
- Part Models
- 2
- 1ku List Price
- Starting From $2.85
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Overview
- High Efficiency: 90% Typical Over Entire Li-Ion Battery Range
- Wide VIN Range: 2.7V to 5.5V
- Up to 500mA Continuous Output Current
- Internal Soft-Start
- Open/Shorted LED Protection
- LED Current Matching Typically <2%
- Constant Frequency 1MHz Operation
- Low Shutdown Current: 6µA
- Overtemperature Protection
- Small Thermally Enhanced 16-Lead (4mm x 4mm) QFN Package
The LTC3453 is a synchronous buck-boost DC/DC converter optimized for driving up to 4 white LEDs at a combined current of up to 500mA from a single Li-Ion battery input. The regulator operates in either synchronous buck, synchronous boost, or buck-boost mode, depending on input voltage and LED maximum forward voltage. Optimum efficiency is achieved using a proprietary architecture that determines which LED requires the largest forward voltage drop at its programmed current, and regulates the common output rail for lowest dropout. Efficiency of 90% can be achieved over the entire usable range of a Li-Ion battery (2.7V to 4.2V).
LED current is programmable to one of four levels (including shutdown) with dual current setting resistors and dual enable pins. In shutdown, the supply current is only 6µA.
A high constant operating frequency of 1MHz allows the use of a small external inductor. The LTC3453 is offered in a low profile (0.75mm) thermally enhanced 16-lead (4mm x 4mm) QFN package.
Applications
- Cell Phones
- Digital Cameras
- PDAs
- Portable Devices
Documentation
Data Sheet 1
User Guide 1
Design Note 2
Press Release 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 |
|---|---|---|---|
| LTC3453EUF#PBF | 16-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC3453EUF#TRPBF | 16-Lead QFN (4mm x 4mm x 0.75mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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LTspice
Models for the following parts are available in LTspice:
- LTC3453
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.
