ISL97651 Datasheet | Renesas

4-Channel Integrated LCD Supply NROETCROEMCMOEMNMDEENIDSDLRE9ED8P6F0LO3ARCENMEWENDTEPSAIGRTNS FN7493 Rev 3.00 April 24, 2009 The ISL97651 represents a high power, integrated LCD supply IC targeted at large panel LCD displays. The ISL97651 integrates a high power, 4.4A boost converter for AVDD generation, an integrated VON charge pump, a VOFF charge pump driver, VON slicing circuitry and a buck regulator with 2A switch for logic generation. The ISL97651 have been designed for ease of layout and low BOM cost. Supply sequencing is integrated for both AVDD -> VOFF -> VON and AVDD/VOFF -> VON sequences. The TFT power sequence uses a separate enable to the logic buck regulator for maximum flexibility. Peak efficiencies are 90% for boost and 92% for buck while operating from a 4V to 5.5V input supply. The current mode buck offers superior line and load regulation. Available in the 36 Ld QFN package, the ISL97651 is specified for ambient operation over the -40°C to +105°C temperature range. Pinout ISL97651 (36 LD TQFN) TOP VIEW 36 NC 35 EN 34 FBB 33 VIN2 32 CM1 31 DELB 30 ENL 29 CDEL 28 NC VIN1 1 LX1 2 LX2 3 CB 4 LXL 5 VSUP 6 FBL 7 CM2 8 CTL 9 THERMAL PAD 27 AGND 26 PGND1 25 PGND2 24 VINL 23 NOUT 22 PGND3 21 FBN 20 VREF 19 FBP Features - 4V to 5.5V input supply - AVDD boost up to 20V, with integrated 4.4A FET - Integrated VON charge pump, up to 34VOUT - VOFF charge pump driver, down to -18V - VLOGIC buck down to 1.2V, with integrated 2A FET - Automatic start-up sequencing - AVDD -> VOFF -> VON or AVDD/VOFF -> VON - Independent logic enable - VON slicing - Thermally enhanced thin QFN package (6mmx6mm) - Pb-free (Ro HS pliant) Applications - LCD monitors (15”+) - LCD-TVs (40”+) - Notebook displays (up to 16”) - Industrial/medical LCD...