LM3224 Datasheet | Texas Instruments

FEATURES - 2 Operating Voltage Range of 2.7V to 7V - 615k Hz/1.25MHz Pin Selectable Frequency Operation - Over Temperature Protection - Optional Soft-Start Function - 8-Lead VSSOP Package APPLICATIONS - TFT Bias Supplies - Handheld Devices - Portable Applications - GSM/CDMA Phones - Digital Cameras - White LED Flash/Torch Applications DESCRIPTION The LM3224 is a step-up DC/DC converter with a 0.15Ω (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 615k Hz and 1.25MHz allowing for easy filtering and low noise. An external pensation pin gives the user flexibility in setting frequency pensation, which makes possible the use of small, low ESR ceramic capacitors at the output. An external softstart pin allows the user to control the amount of inrush current during start up. The LM3224 is available in a low profile 8-lead VSSOP package. Typical Application Circuit VIN L Battery or Power Source 6 VIN SW 7 FSLCT 3 SHDN LM3224 8 SS VC FB GND Optional RFB1 VOUT RFB2 COUT Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective...