Overview: DATASHEET ISL70002SEH, ISL73002SEH
Radiation Hardened and SEE Hardened 22A Synchronous Buck Regulators with Current Sharing FN8264 Rev.12.01 Mar 31, 2022 The ISL70002SEH and ISL73002SEH (ISL7x002SEH) are radiation hardened and SEE hardened high-efficiency monolithic, synchronous buck regulators 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 capability is primarily determined by PVIN voltage with up to 22A for a single IC at PVIN ≤ 5.5V for TJ ≤ +125°C. Two ISL7x002SEH devices, configured to current share, can provide up to 38A of total output current at PVIN ≤ 5.5V for TJ ≤ +125°C assuming ±27% worst-case current share accuracy.
The devices use peak current-mode control with integrated error amp compensation and pin-selectable slope compensation. Switching frequency is also pin selectable to either 1MHz or 500kHz. Two devices can be synchronized 180° out-of-phase to reduce input RMS ripple current.
High integration makes them an ideal choice to power 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.
The ISL7x002SEH is available in a thermally enhanced heat spreader package (R64.
