Smart Power Stage (SPS) Module with Integrated High Accuracy Current and Temperature Monitors

The ISL99227, ISL99227B are Smart Power Stages (SPS) compatible with Intersil’s ISL68xxx/69xxx Digital Multiphase (DMP) controllers and phase doubler (ISL6617A), respectively. The ISL99227, ISL99227B have integrated high accuracy current and temperature monitors that can be fed back to the controller and doubler to complete a multiphase DC/DC system. They simplify design and increase performance by eliminating the DCR sensing network and associated thermal compensation. Light-load efficiency is supported via a dedicated LFET control pin. An industry leading thermally enhanced 5x5 PQFN package allows minimal overall PCB real estate.

Features

• Input range: +4.5V to +18V

• Supports 60A DC current

• ISL99227 with 3.3V compatible tri-state PWM input

• ISL99227B with 5.0V compatible tri-state PWM input

• Downslope current sensing

• ±3 accuracy current monitor (IMON) with REFIN input

• 8mV/°C temperature monitor with OT flag

• Dedicated low-side FET control input

• Comprehensive fault protection for high system reliability

   - High-side FET short and overcurrent protection

   - Over-temperature protection

   - VCC and VIN Undervoltage Lockout (UVLO)

• Open-drain fault reporting output

• Up to 2MHz switching frequency

• Pb-free (RoHS compliant), 32 Ld 5x5 PQFN

Applications

• High frequency and high efficiency VRM and VRD

• Core, graphic and memory regulators for microprocessors

• High density VR for server, networking and cloud computing

• POL DC/DC converters and video gaming consoles