At the heart of any Patient monitoring and Diagnostics equipment is a Processor or FPGA. Intersil offers a complete portfolio of high performance regulators for Intel and AMD embedded processors as well as solutions for all FPGA’s. These products offer a range of highly flexible PWM controllers & drivers that are tailored to meet the stringent power requirements for these processors.

The ISL9440A is an ideal solution for powering any FPGA. The ISL944x family of triple PWM/single linear controllers adds to the flexibility and versatility of the popular ISL644x family of dual PWM/single linear controllers. It can create a highly efficient quad-output solution by using out-of-phase synchronous buck switchers to drive external FETs for current loads up to 20A and has an internal 5V linear regulator that can source up to 6A using an external transistor.
The three PWMs are synchronized at 0°/180°/0° to reduce the RMS input current and ripple voltage. Switching frequency of 300kHz (ISL9440, ISL9441) or 600kHz (ISL9440A) allow the designer to make trade-offs between efficiency and external component size and cost.

The ISL944x family incorporates several protection features such as OCP, OVP, OTP and UVLO, and offers cycle by cycle current limiting. It utilizes current mode control with internal compensation, keeping total BOM costs low. Independent digital enables for each PWM not only allow sequencing without additional circuitry, but are also “green” functions, allowing supplies to shut down when not needed, conserving energy. The output voltages are independently programmable using a simple resistor divider.