G5330A Global Mixed-mode Technology High Efficiency 10A Synchronous Buck Converter for 5V System Power Features General Description G5330A 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 G5330A 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 built-in 5V LDO supports 80mA for internal circuit with automatic bootstrapping to DC/DC converter output. The G5330A is intended for the 5V system power supply of Notebook Computer. The G5330A is available in QFN4X4-28 package. Ultra-High Efficiency Low Quiescent Current of 40µA 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 4.5V to 5.5V Adjustable Output Range 5.5V to 28V Adapter or Battery Input Range Integrated Boost Switch OVP & UVP Over Temperature Protection (non-latch) 3.3ms Soft-Start Power-Good Indicator Fixed 5V, 80mA Bootstrapped Linear Regulator Applications Notebook Computers I/O Supply Networking Power Supply Ordering Information ORDER NUMBER MARKING TEMP. RANGE PACKAGE (Green) G5330AQN1U 5330A -40°C to +85°C QFN4X4-28 FB OUT ON5 TON BST NC 24 23 22 21 27 25 LDO5 PGOOD 28 Pin Configuration 26 Note: QN: QFN4X4-28 1: Bonding Code U : Tape & Reel ENL 1 20 V+ AGND 2 19 V+ 18 V+ 17 V+ 14 15 16 PGND PGND LX 13 8 PGND LX LX PGND 7 12 LX PGND 6 11 5 9 LX LX PGND 4 10 3 LX VCC PGND V+ AGND G5330A QFN4X4-28 Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.0 Feb 14, 2014 1