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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

Product Specifications

Product Parameters

Topology Boost
MinimumInput Voltage 1.8 V
MaximumInput Voltage 8 V
Maximum Output Voltage Ext BJT V
LED Current Ext BJT A
Switching Frequency 200 kHz
Efficiency 94 %
OperatingTemperatureRange -40 to 85 °C
Quiescent Current Typ 0.22 mA

Related Content

Quality Documentation
Orderable Part Number Buy from Distributor / Contact Sales Request Samples


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Arrow Electronics Central EU 62 4/17/2021 Europe Buy Now
Digi-Key Electronics 336 4/17/2021 Europe, Asia, North America Buy Now
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