Fairchild Semiconductor has unveiled FPF1038 and FPF1039 advanced load management switches, which provide a monolithic, one-chip offering to the designers’ challenge of reducing in-rush current, or high di/dt, when a switch is used to disconnect loads with high (>100µF) output capacitances.
The company said that the FPF1038 and FPF1039 integrates a slew-rate controlled low-impedance MOSFET switch (21mO typical) and other features useful in embedded applications: ultra-low power consumption (<1µA), load discharge path, ESD protection, GPIO/CMOS compatible-enable circuitry.
In addition, the devices also features a 1.2V to 5.5V input voltage operating range which aligns with supply rails for the latest embedded processors, custom ASICs, and FPGAs used in these applications.
The optimised slew-rate controlled turn-on characteristics with TR=2.7mS prevent voltage droop on supply rails with bulk capacitances as large as 200µF.
The company said that the devices integrate functionality normally achieved through multi-chip offering, thereby providing designers off-the-shelf capability for their design needs, while reducing component count and increasing efficiency.
