Features and Benefits
- Drives Up to Ten White LEDs from a 3V Supply
- One Pin Shutdown and Current Programming
- LEDs Disconnected in Shutdown
- 32:1 Linear Brightness Control Range
- VIN Range: 2.7V to 5.5V
- ±5% Output Current Accuracy at Full Scale
- Low Shutdown Current: 3μA
- 1MHz Switching Frequency
- Requires Only 1μF Output Capacitor
- Low Proﬁle 6-Lead DFN (2mm × 2mm × 0.75mm) and 6-Lead SOT-23 Packages
The LT3593 is a step-up DC/DC converter designed to drive up to ten white LEDs in series from a Li-Ion cell. Series connection of the LEDs provides identical LED currents and eliminates the need for ballast resistors. The device features a unique high side LED current sense that enables the part to function as a “one wire current source” where the low side of the LED string can be returned to ground anywhere.
Additional features include output disconnect in shutdown, open LED protection and 1-pin shutdown/LED current control. The CTRL pin is toggled to adjust the LED current via an internal counter and a 5-bit DAC.
The LT3593 switches at 1MHz, allowing the use of tiny external components. Constant frequency switching results in low input noise and a small output capacitor. The LT3593 is available in the 6-lead DFN (2mm × 2mm) as well as the 6-lead SOT-23 packages.
- Cell Phones
- Digital Cameras
- PDAs, Handheld Computers
- MP3 Players
- GPS Receivers
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
LT3593 Companion Parts
Recommended Related Parts
Technical Articles (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.
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