Datasheet
Package Availability, Models, Samples & Pricing
General Description
LM2759 is an integrated low-noise, high-current switched capacitor DC/DC converter with a regulated current source. The device
requires only four small ceramic capacitors making the total solution area less than 22 mm
2 and the height less than 1 mm. The LM2759 is capable of driving loads up to 1A from a single-cell Li-Ion battery. Maximum
efficiency is achieved over the input voltage range by actively selecting the proper gain based on the LED forward voltage
and current requirements.
The LED current can be programmed up to 1A via an I
2C-compatible interface, along with eight selectable Flash Time-Out durations. One high-current Flash LED can be driven either
in a high-power Flash mode or a low-power Torch mode. The Strobe pin allows the flash to be toggled via a Flash enable signal
from a camera module. The TX input pin limits the Flash LED current to the Torch current level during a RF PA pulse, to reduce
high loads on the battery. Internal soft-start circuitry limits the amount of inrush current during start-up.
LM2759 is offered in a small 12-pin thermally enhanced LLP package.
Notice: This document is not a full datasheet. For more information regarding this product or to order samples, please contact
your National Semiconductor sales office or visit http://www.national.com/support/dir.html.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
|
LM2759SD | CMOS7 | 0 | 18406 | 0 | 0 | 1089000 | 4 | 309006723
|
|
LM2759SDX | CMOS7 | 0 | 18406 | 0 | 0 | 1089000 | 4 | 309006723
|
Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR.
The Long Term Failure Rates were calculated
at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress
temperature of 150°C to an application temperature of 55°C.
For more information on Reliability Metrics, please click here.
More Application Notes
| Title | Size in Kbytes |
Date |
 |
| AN-1998: Application Note 1998 How to Meet the HDMI 5V Source Requirement |
117
Kbytes |
28-Aug-09 |
Download |
| AN-1731: Application Note 1731 LM2757 Evaluation Board |
573
Kbytes |
19-Feb-08 |
Download |
[Information as of 8-Nov-2009]
|
RoHS Compliance Information