Synchronous Buck Regulator is radiation and SEE hardened.
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Press Release Summary:
Featuring integrated MOSFETs, 6 A Model ISL70001SRH operates over input voltage of 3-5.5 V and provides regulated output voltage that is externally adjustable from 0.8 to ~85% of input voltage. Single-chip regulator incorporates fault protection, utilizes peak current-mode control with integrated compensation, and switches at fixed frequency of 1 MHz. Start-up is controlled by analog soft-start circuit, which can be adjusted from 2-200 ms using external capacitor.
Original Press Release:
Radiation Hardened and SEE Hardened 6A Synchronous Buck Regulator with Integrated MOSFETs: ISL70001SRH
The ISL70001SRH is a radiation hardened and SEE hardened high efficiency monolithic synchronous buck regulator with integrated MOSFETs. This single chip power solution operates over an input voltage range of 3V to 5.5V and provides a tightly regulated output voltage that is externally adjustable from 0.8V to ~85% of the input voltage. Output load current capacity is 6A for TJ < +145°C.
The ISL70001SRH utilizes peak current-mode control with integrated compensation and switches at a fixed frequency of 1MHz. Two ISL70001SRH devices can be synchronized 180° out-of-phase to reduce input RMS ripple current. These attributes reduce the number and size of external components required, while providing excellent output transient response. The internal synchronous power switches are optimized for high efficiency and good thermal performance.
The chip features a comparator type enable input that provides flexibility. It can be used for simple digital on/off control or, alternately, can provide undervoltage lockout capability by precisely sensing the level of an external supply voltage using two external resistors. A power-good signal indicates when the output voltage is within ±11% typical of the nominal output voltage.
Regulator start-up is controlled by an analog soft-start circuit, which can be adjusted from approximately 2ms to 200ms using an external capacitor.
The ISL70001SRH incorporates fault protection for the regulator. The protection circuits include input undervoltage, output undervoltage and output overcurrent.
High integration makes the ISL70001SRH an ideal choice to power many of todays small form factor applications. Two devices can be synchronized to provide a complete power solution for large scale digital ICs, like field programmable gate arrays (FPGAs), that require separate core and I/O voltages.
