Features and Benefits
- Low 200mV Dropout at 9mA
- Up to 60mA/LED Bias Current
- 0.3% LED Current Matching
- Simple LED Brightness Control
- Low 40µA Supply Current
- Low 0.05µA Shutdown Current
- 2.5V to 5.5V Supply Voltage Range
- Thermal Shutdown Protection
- Tiny 6-Pin Thin SOT23 Package (1mm High)
The MAX1916 low-dropout bias supply for white LEDs is a high-performance alternative to the simple ballast resistors used in conventional white LED designs. The MAX1916 uses a single resistor to set the bias current for three LEDs, which are matched to 0.3%. The MAX1916 consumes only 40µA of supply current when enabled and 0.05µA when disabled.
The MAX1916's advantages over ballast resistors include significantly better LED-to-LED bias matching, much lower bias variation with supply voltage variation, significantly lower dropout voltage, and in some applications, significantly improved efficiency. The MAX1916 requires a 200mV dropout at a 9mA load on each output to match the LED brightness.
The MAX1916 is available in a space-saving 6-pin Thin SOT23 package.
- Battery-Powered Applications
- Digital Cameras and Camcorders
- Next-Generation Wireless handsets
- PDAs, Palmtops, and Handy Terminals
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
MAX1916 Reliability Data1/12/202399K
Driving LEDs in Battery-Operated Applications: Controlling Brightness Power Efficiently3/3/2023
Tutorial: Improve Sensor Performance and SNR in Pulse Oximeter Designs6/21/2010
Important Design Considerations for Heart-Rate and Fitness Monitors5/10/2010
Blood Pressure Monitor Design Considerations5/10/2010
Introduction to Digital Stethoscopes and Electrical Component Selection Criteria5/10/2010
Important Design Considerations for Digital Thermometers5/10/2010
Guide to LED Circuit Designs and LED Basics & Operation6/15/2004
Charge-Pump and Step-Up DC-DC Converter Solutions for Powering White LEDs in Series or Parallel Connections4/23/2002
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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