Maxim Integrated MAX8901AETA T

Description
The MAX8901A/MAX8901B step-up converters drive from two to six series-connected white LEDs (WLEDs) with constant current to provide uniform WLED intensity for LCD backlighting in cell phones, PDAs, and other handheld devices. These converters operate at a fixed 750kHz (typ) switching frequency, allowing for tiny external components, and are optimized for the highest possible efficiency over the full 1-cell Li /Li-Poly battery range.

Features
Cost-Effective and Flexible Solution for Wide Range of Backlighting Applications
Supplies from 2 to 6 WLEDs with 1.3 % LED Current Accuracy
2.6V to 5.5V Input Voltage Range
Fixed-Frequency Operation
Flexible Dimming Control
Direct PWM Dimming (MAX8901A)
32-Step, Single-Wire Serial Dimming (MAX8901B)
Protection Features Improve System Reliability
WLED Overvoltage Protection (25V typ)
Internal Soft-Start and Thermal Shutdown
Input Undervoltage Lockout
Input Overvoltage Lockout
High Efficiency Extends Battery Life
Up to 91% Efficiency
0.01μA (typ) Shutdown Current
No WLED Current in Shutdown
8-Pin, 2mm x 2mm TDFN Package Saves Space

Applications
Display Backlight (from 2 to 6 WLEDs)
Cellular Phones
PDAs and Smartphones
MP3 and Portable Media Players
Portable Navigation Devices
Digital Cameras