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Manufacturer Part #


CAT4137 Series White LEDs 3 V 0.1 mA Surface Mount LED Driver - TSOT-23-5

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Mfr. Name: ON Semiconductor
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Product Specification Section
Technical Attributes
Attributes Table
No of Outputs: Single
Supply Voltage: 2.2V to 5.5V
Supply Current: 0.4mA to 1.5mA
Output Current per Channel: 30mA
Output Voltage: 24V
Switching Frequency-Max: 1.3MHz
Operating Temp Range: -65°C to +160°C
Height - Max: 0.9mm
Package Style:  TSOT-23-5
Mounting Method: Surface Mount
Features & Applications

The CAT4137 is a CMOS Boost Converter - White LED Driver.

The CAT4137 is a DC/DC step-up converter that delivers a regulated output current. Operation at a constant switching frequency of 1 MHz allows the device to be used with small value external ceramic capacitors and inductor. The device drives a string of white LEDs connected in series and provides the regulated current to control the LEDs with inherent uniform brightness and matching. An external resistor R1 sets the output current and allows up to 30 mA current to be supported over a wide range of input supply voltages from 2.2 V to 5.5 V, making the device ideal for battery-powered applications. LED dimming can be done by using a DC voltage, a logic signal, or a pulse width modulation (PWM) signal. The shutdown control 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 up to 5 White LEDs from 3 V
  • Power Efficiency up to 87%
  • Low Quiescent Ground Current 0.1 mA
  • Adjustable Output Current (up to 30 mA)
  • High Frequency 1 MHz Operation
  • “Zero” Current Shutdown Mode
  • Operates Down to 2 V (from Two AA Batteries)
  • Soft Start Power−up
  • Open LED Low Power Mode
  • Automatic Shutdown at 1.9 V (UVLO)
  • Thermal Shutdown Protection
  • Thin SOT23 5−lead (1 mm Max Height)
  • These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant


  • LCD Backlighting
  • Cellular Phones
  • Handheld Devices
  • Digital Cameras

Pricing Section
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Factory Lead Time:
49 Weeks
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