ISL70001SRH

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 www.DataSheet4U.com to 200ms using an external capacitor. ...