The MAX1916EZT+T is a low dropout, constant current triple white LED bias supply in 6 pin TSOT-23 package. This low dropout bias supply for white LEDs is high performance alternative to simple ballast resistors used in conventional white LED designs. The MAX1916 uses a single resistor to set bias current for three LEDs which are matched to 0.3%. It consumes only 40μA of supply current when enabled and 0.05μA when disabled. The advantages of MAX1916 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 device requires a 200mV dropout at 9mA load on each output to match the LED brightness.
- Supply voltage range from 2.5V to 5.5V
- Operating temperature range from -40°C to 85°C
- Power 3 white LEDs directly from single Li+ with 0.3% brightness matching
- Up to 60mA/LED bias current
- Simple LED brightness control
- Thermal shutdown protection
- LED leakage current of 0.01μA in shutdown mode
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