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Technical content

Features

„ 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 General Description G5330A is a 10A, synchronous DC/DC buck converter with integrated 20m Ω N-channel high-side MOSFET and 8.5mΩ N-channel low-side MOSFET. It uses con- stant on-time control scheme to handle wide in- put/output voltage ratios with ease and provides 100ns “instant-on” response to load transients while main- taining a relatively constant switching frequency. The G5330A achieves high efficiency at a reduced cost by eliminating the current-sense resistor found in tradi- tional current-mode PWMs. Single-stage buck conver- sion allows these devices to directly step down high-voltage batteries for the highest possible effi- ciency. The built-in 5V LDO supports 80mA for internal circuit with automatic bootstrapping to DC/DC con- verter output. The G5330A is intended for the 5V sys- tem power supply of Notebook Computer. The G5330A is available in QFN4X4-28 package.

Ordering Information

NUMBER MARKING TEMP. RANGE PACKAGE (Green) G5330AQN1U 5330A -40 °C to +85°C QFN4X4-28 Note: QN: QFN4X4-28 1: Bonding Code U : Tape & Reel Pin Configuration G5330A QFN4X4-28 AGND V+ LX ENL AGND LDO5 PGND LX LX LX LX PGND PGND LX LX PGND PGND PGND PGND OUT TON PGOOD FB ON5 BST VCC NC Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. G5330A QFN4X4-28 AGND V+ LX ENL AGND LDO5 PGND LX LX LX LX PGND PGND LX LX PGND PGND PGND PGND OUT TON PGOOD FB ON5 BST VCC NC Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.