G5335 Global Mixed-mode Technology High Efficiency 10A Synchronous Buck Converter Features General Description G5335 is a 10A, synchronous DC/DC buck converter with integrated 20mΩ N-channel high-side MOSFET and 8.5mΩ N-channel low-side MOSFET. It uses constant on-time control scheme to handle wide input/output voltage ratios with ease and provides 100ns “instant-on” response to load transients while maintaining a relatively constant switching frequency. The G5335 achieves high efficiency at a reduced cost by eliminating the current-sense resistor found in traditional current-mode PWMs. Single-stage buck conversion allows these devices to directly step down high-voltage batteries for the highest possible efficiency. The G5335 is intended for the power supply of Notebook Computer, or other low-voltage supplies as low as 0.8V. The G5335 is available in QFN4X4-23 package. Ultra-High Efficiency Integrated 8.5mΩ at VCC=5V N-Channel MOSFET for Low Side Integrated 20mΩ at VCC=5V N-Channel MOSFET for High Side No Current-Sense Resistor (Lossless ILIMIT) Quasi-PWM with 100ns Load-Step Response 1% VOUT Accuracy Over Line and Load Programmable Switching Frequency Adjustable Output Range from 0.8V 4.5V to 28V Adapter or Battery Input Range Integrated Boost Switch OVP & UVP Over Temperature Protection (non-latch) Adjustable Soft-Start Power-Good Indicator Applications Notebook Computers I/O Supply Chipset/RAM Supply as Low as 0.8V Networking Power Supply Ordering Information ORDER NUMBER MARKING TEMP. RANGE PACKAGE (Green) G5335QT1U 5335 -40°C to +85°C QFN4X4-23 Note: QT: QFN4X4-23 1: Bonding Code U : Tape & Reel SS V+ VCC BST PGND LX 23 22 21 20 19 18 Pin Configuration PGOOD 1 17 LX EN 2 16 LX PFM 3 15 PGND LX V+ 6 12 PGND NC 11 TON LX PGND 10 13 LX 5 9 FB V+ PGND 8 14 V+ 4 7 AGND G5335 QFN4X4-23 Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.3 Jun 19, 2013 1