DocumentationDatasheet
Design Note
Reliability Data
cad_symbol
ltspice
Features
- Inherently Matched LED Current
- Drives Up to Six LEDs from a 3.6V Supply
- No External Schottky Diode Required
- 1.2MHz Switching Frequency (LT3465)
- 2.4MHz Switching Frequency Above AM Broadcast Band (LT3465A)
- VIN Range: 2.7V to 16V
- VOUT(MAX) = 30V
- Automatic Soft-Start (LT3465)
- Open LED Protection
- High Efficiency: 81% (LT3465) 79% (LT3465A) Typical
- Requires Only 0.22µF Output Capacitor
- Low Profile (1mm) SOT-23 Packaging
Typical Application
Description
The LT3465/LT3465A are step-up DC/DC converters designed to drive up to six LEDs in series from a Li-Ion cell. Series connection of the LEDs provides identical LED currents and eliminates the need for ballast resistors. These devices integrate the Schottky diode required externally on competing devices. Additional features include output voltage limiting when LEDs are disconnected, onepin shutdown and dimming control. The LT3465 has internal soft-start.
The LT3465 switches at 1.2MHz, allowing the use of tiny external components. The faster LT3465A switches at 2.4MHz. Constant frequency switching results in low input noise and a small output capacitor. Just 0.22µF is required for 3-, 4- or 5-LED applications.
The LT3465 and LT3465A are available in low profile (1mm) 6-lead SOT-23 (ThinSOT™) packages.
SOT-23
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LT3465AES6#PBF | SOT | 6 | E | $2.07 | |
| LT3465AES6#TRMPBF | SOT | 6 | E | $2.07 | $1.43 |
| LT3465AES6#TRPBF | SOT | 6 | E | $2.07 | $1.41 |
| LT3465ES6#PBF | SOT | 6 | E | $2.07 | |
| LT3465ES6#TRMPBF | SOT | 6 | E | $2.07 | $1.43 |
| LT3465ES6#TRPBF | SOT | 6 | E | $2.07 | $1.41 |
| LT3465ES6 | SOT | 6 | E | $4.14 | |
| LT3465AES6 | SOT | 6 | E | $4.14 | |
| LT3465AES6#TR | SOT | 6 | E | $4.14 | $2.82 |
| LT3465ES6#TR | SOT | 6 | E | $4.14 | $2.82 |
| LT3465AES6#TRM | SOT | 6 | E | $4.14 | $2.86 |
| LT3465ES6#TRM | SOT | 6 | E | $4.14 | $2.86 |
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC637A | LT3465ES6 LT3465AES6 | Single Cell White LED (4) Driver | $75.00 |