MAX1916EZT+T

MAX1916EZT+T is a low-dropout, constant-current triple white LED bias supply. This 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 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. Suitable for next-generation wireless handsets, PDAs, Palmtops, and Handy terminals, digital cameras, camcorders, battery-powered equipment applications.

• Supply voltage range from 2.5V to 5.5V
• Up to 60mA/LED bias current
• Simple LED brightness control
• Low 40µA supply current
• Low 0.05µA shutdown current
• Power 3 white LEDs directly from single Li+ or three NiMH cells
• Thermal shutdown protection
• SET LED leakage current of 0.01μA in shutdown mode at TA = -40°C to +25°C, EN = GND, VSET = 3.3V
• Tiny 6-pin thin SOT23 package (1mm high)
• Operating temperature range from -40°C to 85°C

Opmerkingen

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