Rad Hard and SEE Hard 6A Synchronous Buck Regulator

The ISL70001ASEH 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.

Features

• ±1 Reference Voltage Over Line, Load, Temperature and Radiation

• Current Mode Control for Excellent Dynamic Response

• Full Mil-Temp Range Operation (TA = -55°C to +125°C)

• 50 Lower Shutdown Supply Current than the ISL70001SEH

• Available in a thermally enhanced heatsink package - R48.B

• Highly Efficient: 94 Peak Efficiency

• Operates from 3V to 5.5V Supply

• Adjustable Output Voltage

- Two External Resistors Set VOUT from 0.8V to ~85 of VIN

• Bi-directional SYNC Pin Allows Two Devices to be Synchronized 180° Out-of-Phase

• Power-Good Output Voltage Monitor

• Adjustable Analog Soft-Start

• Input Undervoltage, Output Undervoltage and Output Overcurrent Protection

• Electrically Screened to DLA SMD 5962-09225

• QML Qualified per MIL-PRF-38535 Requirements

• Radiation Hardness

- Total Dose [50-300rad(Si)/s] . . . . . . . . . . . . . . 100krad(Si)

- Total Dose [<10mrad(Si)/s] . . . . . . . . . . . . . . 100krad(Si)*

* Product capability established by initial characterization. The EH version is acceptance tested on a wafer-by-wafer basis to 50krad(Si) at low dose rate.

• SEE Hardness

- SEL and SEB LETeff . . . . . . . . . . . . 86.4MeV/mg/cm2 min

- SEFI X-section (LETeff = 86.4MeV/mg/cm2) 1.4 x 10-6 cm2 max

- SET LETeff (< 1 Pulse Perturbation) 86.4MeV/mg/cm2 min

Applications

• FPGA, CPLD, DSP, CPU Core or I/O Voltages

• Low-Voltage, High-Density Distributed Power Systems