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LT3593

Features: ` 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: 3A` 1MHz Switching Frequency` Requires ...

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SeekIC No. : 004401133 Detail

LT3593: Features: ` 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% ...

LT3593 Data Sheet

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Part Number:
LT3593
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/20

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Product Details

Description



Features:

` 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: 3A
` 1MHz Switching Frequency
` Requires Only 1F Output Capacitor
` Low Profi le 6-Lead DFN (2mm * 2mm * 0.75mm) and 6-Lead SOT-23 Packages


Application

· Cell Phones
· Digital Cameras
· PDAs, Handheld Computers
· MP3 Players
· GPS Receivers


Pinout

Connection Diagram


Specifications

Input Voltage ..........................................................6V
CTRL Voltage ...........................................................6V
SW Voltage ............................................................45V
CAP Voltage ...........................................................45V
LED Voltage ...........................................................45V
Operating Junction Temperature Range
(Note 2) ..................................................40 to 85
Maximum Junction Temperature......................... 125
Storage Temperature Range ............... 65 to 150
Lead Temperature (Soldering, 10 sec)
TSOT Package ................................................... 300


Description

The LT®3593 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.




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