ISL70002SEH
Rad Hard and SEE Hard 12A Synchronous Buck Regulator with Multi-Phase Current Sharing

Key Features

• DLA SMD#5962-12202
• 12A Output Current for a Single Device (at T_J = +150°C)
• 19A Output Current for Two Paralleled Devices
• 1MHz or 500kHz Switching Frequency
• 3V to 5.5V Supply Voltage Range
• ±1% Ref. Voltage (Line, Load, Temp. & Rad.)
• Pre-Biased Load Compatible
• Redundancy/Junction Isolation: Exceptional SET Performance
• Excellent Transient Response
• High Efficiency > 90%
• Two ISL70002SEH Synchronization, Inverted-Phase
• Comparator Input for Enable and Power-Good
• Adjustable Analog Soft-Start
• Input Undervoltage, Output Undervoltage and Adjustable Output Overcurrent Protection
• QML Qualified per MIL-PRF-38535
• Full Mil-Temp Range Operation (-55°C to +125°C)
• Radiation Environment
• High Dose: 100 krad(Si)
• ELDRS: 100 krad(Si)* *Level guaranteed by characterization; EH version is production tested to 50 krad(Si).
• SEE Hardness
• SEL and SEB LET_TH: 86.4MeV/mg/cm²
• SEFI LET_TH: 43MeV/mg/cm²
• SET LET_TH: 86.4MeV/mg/cm²

Description

The ISL70002SEH 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 12A for T_J ≤ +150°C. Two ISL70002SEH devices configured to current share can provide 19A total output current, assuming ±27% worst-case current share accuracy.

The ISL70002SEH utilizes 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 ISL70002SEH devices can be synchronized 180° out-of-phase to reduce input RMS ripple current.

High integration makes the ISL70002SEH 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.

Applications

• FPGA, CPLD, DSP, CPU Core and I/O Voltages
• Low-Voltage, High-Density Distributed Power Systems