CAT4238 Series 20 mA 5.5 V 1.3 MHz 10 LED Boost Converter LED Driver - SOT-23-5

Mfr Part#: CAT4238TD-GT3
Mounting Method:  Surface Mount
Package Style:  SOT-23-5 (SOT-25)
Packaging:  REEL
Std Packaging Qty:  3,000



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$0.4100 USD (each)
3000+ $0.4100


Qty in Stock : 6,000
On Order :
Min. Order Qty: 3,000
Multiple of: 3,000
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Product Highlight

  • Supply Voltage: 2.8 to 5.5 V
  • Output Current per Channel: 40 mA
  • Output Voltage: 38 V
  • Switching Frequency-Max: 1.3 MHz

The CAT4238 is a High Efficiency 10 LED Boost Converter.

The CAT4238 is a DC/DC step−up converter that delivers an accurate constant current ideal for driving LEDs. Operation at a fixed switching frequency of 1 MHz allows the device to be used with small value external ceramic capacitors and inductor. LEDs connected in series are driven with a regulated current set by the external resistor R1. LED currents up to 40 mA can be supported over a wide range of input supply voltages up to 5.5 V, making the device ideal for battery−powered applications. The CAT4238 high−voltage output stage is perfect for driving mid−size and large panel displays containing up to ten white LEDs in series. LED dimming can be done by using a DC voltage, a logic signal, or a pulse width modulation (PWM) signal. The shutdown input pin allows the device to be placed in power−down mode with “zero” quiescent current. In addition to thermal protection and overload current limiting, the device also enters a very low power operating mode during “Open LED” fault conditions. The device is housed in a low profile (1 mm max height) 5−lead thin SOT23 package for space critical applications.

Key Features:

  • Drives High Voltage LED Strings (38 V)
  • Up to 87% Efficiency
  • Low Quiescent Ground Current 0.6 mA
  • Adjustable Output Current
  • 1 MHz Fixed Frequency Low Noise Operation
  • Soft Start “In−rush” Current Limiting
  • Shutdown Current Less than 1 A
  • Open LED Overvoltage Protection
  • Automatic Shutdown at 1.9 V (UVLO)
  • Thermal Overload Protection
  • Thin SOT23 5−lead (1 mm Max Height)
  • These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant.


  • GPS Navigation Systems
  • Portable Media Players
  • Handheld Devices, Digital Cameras
  • Portable Game Machine

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