615kHz 1.25MHz Step-up PWM DC DC Converter Evaluation Module


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The LM3224 is a step-up DC/DC converter with a 0.15 ohm (typ.), 2.45A (typ) internal switch and pin selectable operating frequency. With the ability to convert 3.3V to multiple outputs of 8V, -8V, and 23V, the LM3224 is an ideal part for biasing TFT displays. WIth the high current switch it is also ideal for driving high current white LEDs for flash applications. The LM3224 can be operated at switching frequencies of 615kHz and 1.25MHz allowing for easy filtering and low noise. An external compensation pin gives the user flexibility in setting frequency compensation, which makes possible the use of small, low ESR ceramic capacitors at the output. An external soft-start pin allows the user to control the amount of inrush current during start up. The LM3224 evaluation board is set up for a 5V output from an input voltage from 2.7V to 4.2V, or the equivalent range of a Li-Ion battery. Included on the board are 2 jumpers, one to select the switching frequency and one to select if the device is on or off. Both may also be controlled externally by removing the jumper. The regulator is capable of supplying up to at least 650mA of load current down to the minimum of 2.7V input at 1.25MHZ operation.

  • Operating voltage range of 2.7V to 7V
  • 615kHz/1.25MHz pin selectable frequency operation
  • Over temperature protection
  • Optional soft-start function
  • 8-Lead MSOP package


  • TFT Bias Suplies
  • Handheld Devices
  • Portable Applications
  • GSM/CDMA Phones
  • Digital Cameras
  • White LED Flash/Torch Applications


Boost converters (integrated switch)
LM3224 615kHz/1.25MHz Step-up PWM DC/DC Converter

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Evaluation board

LM3224MM-ADJEV/NOPB – 615kHz 1.25MHz Step-up PWM DC DC Converter Evaluation Module

TI's Standard Terms and Conditions for Evaluation Items apply.

Technical documentation

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Type Title Date
* User guide AN-1394 LM3224 Evaluation Board (Rev. A) Apr. 26, 2013
More literature LM3224MM-ADJEV/NOPB EU Declaration of Conformity (DoC) Jan. 02, 2019
More literature LM3224MM-ADJEV/NO EU Declaration of Conformity (DoC) Jan. 02, 2019

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