LED DRVR 10Segment 3.3V/5V 8-Pin TDFN EP

The MAX1553/MAX1554 drive white LEDs in series with a constant current to provide efficient display backlighting in cellular phones, PDAs, and other hand-held devices. The step-up converter includes an internal 40V, low RDSON, N-channel MOSFET switch for high efficiency and maximum battery life. The MAX1553 has a current limit of 480mA for driving two to six white LEDs, while the MAX1554 has a current limit of 970mA for driving up to 10 white LEDs. A single analog/PWM Dual Mode input provides two simple means of brightness adjustment. A separate enable input provides on/off control. Soft-start minimizes inrush current during startup. The MAX1553/MAX1554 are available in space-saving 8-pin TDFN 3mm x 3mm packages.

• Highly Integrated and Flexible Solution for Wide Range of Backlighting Applications
  • Constant-Current Regulation for Even LEDIllumination
  • Internal 40V MOSFET Switch Capable of Driving10 LEDs
  • 2.7V to 5.5V Input Voltage Range
  • Analog or PWM Control of LED Intensity
  • Optimized for Low Input Ripple

Soft-Start Minimizes Inrush Current

High Efficiency Improves Battery Life

• Up to 88% Efficiency Driving 6 LEDs
• Up to 82% Efficiency Driving 9 LEDs (20mA,V_CC = 3.6V)

Tiny 8-Pin, 3mm x 3mm TDFN Package Saves Space

• Small, Low-Profile External Components