The price listed is the manufacturer's suggested retail price for quantities of 1K units. However, prices in today's market are fluid and may change without notice.
MSL = Moisture Sensitivity Level - per IPC/JEDEC J-STD-020
SMD = Standard Microcircuit Drawing
Description
The ISL6263B IC is a Single-Phase Synchronous-Buck PWM voltage regulator featuring Intersil's Robust Ripple Regulator (R3) Technology™. The ISL6263B is an implementation of the Intel® Mobile Voltage Positioning (IMVP) protocol for GPU Render Engine core power. Integrated current monitor, droop amplifier, MOSFET drivers and bootstrap diode result in smaller implementation area and lower component cost.
Intersil's R3 Technology™ combines the best features of both fixed-frequency PWM and hysteretic PWM, delivering excellent light-load efficiency and superior load transient response by commanding variable switching frequency during the transitory event. For maximum conversion efficiency, the ISL6263B automatically enters diodeemulation mode (DEM) should the inductor current attempt to flow negative. DEM is highly configurable and easy to set-up. A PWM filter can be enabled that prevents the switching frequency from entering the audible spectrum as a result of extremely light load while in DEM.
The Render core voltage can be dynamically programmed from 0.41200V to 1.28750V by the five VID input pins without requiring sequential stepping of the VID states. The ISL6263B requires only one capacitor for both the soft-start slew-rate and the dynamic VID slew-rate by internally connecting the SOFT pin to the appropriate current source. Processor socket Kelvin sensing is accomplished with an integrated unity-gain true differential amplifier.
Key Features
Precision single-phase core voltage regulator
0.5% system accuracy 0°C to +100°C
Differential remote GPU die voltage sensing
Differential droop voltage sensing
Real-time GPU current monitor output
Applications up to 25A
Input voltage range: +5.0V to +25.0V
Programmable PWM frequency: 200kHz to 500kHz
Pre-biased output start-up capability
5-bit voltage identification input (VID)
1.28750V to 0.41200V
25.75mV steps
Sequential or non-sequential VID change on-the-fly
Configurable PWM modes
forced continuous conduction mode
automatic entry and exit of diode emulation mode
selectable audible frequency PWM filter
Integrated MOSFET drivers and bootstrap diode
Choice of current sensing schemes
Lossless inductor DCR current sensing
Precision resistive current sensing
Overvoltage, undervoltage and overcurrent protection
Evaluation Board(s):
Technical Homepage:
