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The ZXSC400 is a voltage mode boost converter in the SOT26 package. Its low feedback voltage allows the current in a chain of LEDs to be set and accurately monitored with a single resistor giving minimal losses. Its excellent load and line regulation means that for the full supply range from lithium-ion cells, the LED current will typically change by less than 1%. Using high efficiency Zetex switching transistors with ratings of 20V and higher allow many LEDs to be chained in series for the best LED current matching possible.
White LED backlighting for colour LCD panels
General LED backlighting
High performance white LED flashlights
General LED driving from batteries
1.8V to 8V supply range
Typical output regulation of ±1%
Over 80% typical efficiency
4.5μA typical shutdown current
Series connection for ultimate LED current matching