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Technical content
Features
Ultra-High Efficiency 4700ppm/°C RDS(ON) Current Sensing ( without Current-Sense Resistor ) Quasi-PWM with 100ns Load-Step Response Built in 1% 0.5V Reference Voltage 0.5V to 3.3V Adjustable Output Range 4.5V to 28V Battery Input Range Integrated Boost Diode OVP & UVP 1.5ms Voltage Servo Soft-Start Drives Large Synchronous-Rectifier FETs Power-Good Indicator Thermal Shutdown (Non-latch)
Applications
Notebook Computers CPU Core Supply I/O Supply Chipset/RAM Supply as Low as 0.5V General Description G5338 uses constant on-time control scheme to han- dle wide input/output voltage ratios with ease and pro- vides 100ns “instant-on” response to load transients while maintaining a relatively constant switching fre- quency. The G5338 achieves high efficiency at a re- duced cost by eliminating the current-sense resistor found in traditional current-mode PWMs. Efficiency is further enhanced by an ability to drive very large syn- chronous rectifier MOSFETs. Single-stage buck con- version allows these devices to directly step down high-voltage batteries for the highest possible effi- ciency. The noiseless pulse-skipping mode setting maintains the switching frequency above 25kHz to eliminates the audio noise. The G5338 is intended for CPU core, chipset, DRAM, or other low-voltage sup- plies as low as 0.5V. The G5338 is available in TQFN2X2-12 package.
Ordering Information
NUMBER MARKING TEMP. RANGE PACKAGE (Green) G5338K71U 5338 -40 °C to +85°C TQFN2X2-12 Note: K7: TQFN2X2-12 1: Bonding Code U : Tape & Reel Pin Configuration G5338 TQFN2X2-12 DL 9 PGOOD EN MODE TON ILIM GND4 BST VCC LX DH Thermal Pad FB