G5517 Global Mixed-mode Technology Inc. Integrated Power Solution for TFT-LCD Features General Description 2.5V to 5.5V Input Supply Range 1.2MHz Current-Mode Step-Up Converter Built-In 18V, 3A 0.2Ω n-Channel MOSFET Charge Pumps for VGON and VGOFF High Voltage Switch with Adjustable Delay Thermal Overload Protection TQFN4X4-24 Package The G5517 includes a step-up converter, two charge pumps, and a high current operational amplifier for TFT LCD. Also included are a logic-controlled high-voltage switch with adjustable delay and an open drain output reset comparator. Applications The charge pumps in G5517 regulate TFT gate-on and gate-off power supplies. The power-on sequence is controlled by the control logic. The blanking time for reset function is 163ms (typ.) from startup. The RSTIN begins to detect voltage below 1.25V afterward. For more detail information, please refer to the timing chart. The step-up DC/DC converter provides the regulated power supply for the panel source driver IC. The converter is a high performance current-mode regulator with operating frequency at 1.2MHz. It also provides fast transient response and high efficiency. LCD Monitor Panels Notebook Computer Displays LCD TVs G5517 is available in TQFN4X4-24 package Ordering Information ORDER NUMBER MARKING TEMP. RANGE PACKAGE (Green) 5517 -40°C to 85°C TQFN4X4-24 G5517R51U Note: R5: TQFN4X4-24 1: Bonding Code U: Tape & Reel VGHM RE LX PGND 22 21 20 19 23 VGH 24 DEL Pin Configuration POS 1 18 PGND NEG 2 17 FB OUT 3 16 COMP BGND 4 15 RSTIN SUP 5 14 AGND DRVP 6 13 VDD 9 10 11 12 FBP FBN REF 8 CTL RST 7 DRVN Thermal Pad G5517 TQFN4X4-24 Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.2 Jan 17, 2011 1