G5380B

Global Mixed-mode Technology G5380B High Efficiency 8A Synchronous Buck Converter for 3.3V System Power Features „ Ultra-High Efficiency „ Low Quiescent Current of 40µA „ Integrated 17mΩ 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 „ 3.0V to 3.6V Adjustable Output Range „ 5.5V to 28V Adapter or Battery Input Range „ Noiseless Pulse-skipping Mode (25kHz min) „ VCLK Output „ Integrated Boost Switch „ OVP & UVP „ Over Temperature Protection (non-latch) „ 3.3ms Soft-Start „ Power-Good Indicator „ Fixed 3.3V, 80mA Bootstrapped Linear Regulator General Description G5380B is a 8A, synchronous DC/DC buck converter with integrated 20mΩ N-channel high-side MOSFET and 17mΩ 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 G5380B 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 3.3V LDO supports 80mA for internal circuit with automatic bootstrapping to DC/DC conver...