LTC3452 - Synchronous Buck-Boost MAIN/CAMERA White LED Driver
Maximum LED current for each LED display is programmable with a single external resistor. Dual enable pins allow for PWM brightness control in the low power bank and independent on/off control for the high current bank (optimal for LED camera flash). In shutdown, the supply current is only 6.5µA.
A high constant operating frequency of 1MHz allows the use of a small external inductor. The LTC3452 is offered in a low profile (0.75mm) thermally enhanced 20-lead (4mm × 4mm) QFN package.
Features- High Efficiency: ≥85% Over Entire Li-Ion Battery Range
- Wide VIN Range: 2.7V to 5.5V
- Independent MAIN/CAMERA Current Control
- Up to 425mA Continuous Output Current
- Internal Soft-Start
- Open/Shorted LED Protection
- PWM Brightness Control
- LED Current Matching Typically <2.5%
- Constant Frequency 1MHz Operation
- Low Shutdown Current: 6.5µA
- Overtemperature Protection
- Small Thermally Enhanced 20-Lead (4mm × 4mm) QFN Package
Typical Application
 | Applications- Cell Phones
- Digital Cameras
- PDAs
- Portable Devices
Packaging |
Order Information
| Part Number | Package | Temp | Price(1-99) | Price (1k)* |
|---|
| LTC3452EUF#PBF | 4x4 QFN-20 | E | $2.57 | $1.80 |
| LTC3452EUF#TRPBF | 4x4 QFN-20 | E | | $1.86 |
Demo Boards
| Part Number | Description | Price |
|---|
| DC928A | LTC3452EUF Demo Board | $75.00 |
DatasheetReliability DataPress ReleaseLTspice | Related Product |
