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Technical content

Features

„ Ultra-High Efficiency „ Low Quiescent Current of 60µA „ Integrated 15mΩ at VCC=5V N-Channel MOSFET for Low Side „ Integrated 30mΩ 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 „ 0.75V to 3.6V Adjustable Output Range „ 3V to 28V Adapter or Battery Input Range „ Integrated Boost Switch „ OVP & UVP „ Over Temperature Protection (non-latch) „ 2ms Soft-Start „ Power-Good Indicator

Applications

„ Notebook Computers „ I/O Supply „ Chipset/RAM Supply as Low as 0.75V „ Networking Power Supply General Description G5332A is a 8A, synchronous DC/DC buck converter with integrated 30m Ω N-channel high-side MOSFET and 15mΩ 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 G5332A 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 G5332A is intended for the power supply of Notebook Computer, or other low-voltage supplies as low as 0.75V. The G5332A is available in QFN3X3-21 package.

Ordering Information

NUMBER MARKING TEMP. RANGE PACKAGE (Green) G5332AQP1U 5332A -40 °C to +85°C QFN3X3-21 Note: QP: QFN3X3-21 1: Bonding Code U : Tape & Reel Pin Configuration BST TON FB21 AGND VCC PGOOD EN PGND PGND AGND LX LX LX LX PGND PGND PGND Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. G5332A QFN3X3-21 BST TON FB21 AGND VCC PGOOD EN PGND PGND AGND LX LX LX LX PGND PGND PGND Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. G5332A QFN3X3-21