LM2622

LM2622 www.ti.com SNVS068E – MAY 2000 – REVISED MARCH 2013 LM2622 600kHz/1.3MHz Step-up PWM DC/DC Converter Check for Samples: LM2622 FEATURES 1 2 1.6A, 0.2Ω, Internal Switch Operating Voltage as Low as 2.0V 600kHz/1.3MHz Pin Selectable Frequency Operation Over Temperature Protection 8-Lead VSSOP Package APPLICATIONS TFT Bias Supplies Handheld Devices Portable Applications GSM/CDMA Phones Digital Cameras DESCRIPTION The LM2622 is a step-up DC/DC converter with a 1.6A, 0.2Ω internal switch and pin selectable operating frequency. With the ability to convert 3.3V to multiple outputs of 8V, -8V, and 23V, the LM2622 is an ideal part for biasing TFT displays. The LM2622 can be operated at switching frequencies of 600kHz and 1.3MHz 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. The LM2622 is available in a low profile 8-lead VSSOP package. Typical Application Circuit 2.7V - 3.3V L 10uH D Battery or Power Source CIN 22UF 5 6 VIN SW 7 FSLCT LM2622 3 SHDN VC 2 FB GND 14 RC 24k RFB! 40.2k 8V RFB2 7.5k COUT 22uF CC 2.2nF Figure 1. 600 kHz Operation 1 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 tra...