Features and Benefits
- Highly Integrated and Flexible Solution for Wide Range of Backlighting Applications
- Constant-Current Regulation for Even LED Illumination
- Internal 40V MOSFET Switch Capable of Driving 10 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, VCC = 3.6V)
- Tiny 8-Pin, 3mm x 3mm TDFN Package Saves Space
- Small, Low-Profile External Components
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.
- Cell Phones
- Color Display Backlight
- PDA, Palmtop, and Wireless Handhelds
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
MAX1554 Reliability Data1/12/2023258K
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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