Radiation Hardened and SEE Hardened 22A Synchronous Buck Regulator with Current Sharing
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Overview
Description
The ISL73002SEH 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 capability is primarily determined by PVIN voltage with up to 22A for a single IC at PVIN ≤ 5. 5V for TJ ≤ +125°C. Two ISL73002SEH 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 ISL73002SEH uses 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 the ISL73002SEH 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.
Features
- DLA SMD 5962-12202
- Maximum output current (Single Phase):
- 22A with external Schottky (TJ ≤125°C, PVIN ≤5.5V)
- 18A (TJ ≤125°C, PVIN ≤5.5V)
- 14A (TJ ≤125°C, PVIN ≤6.2V)
- 12A (TJ ≤150°C, PVIN ≤6.2V)
- Maximum output current (Dual Phase)
- 38A (27% worst case current sharing)
- 1MHz or 500kHz switching frequency
- 3V to 6.2V supply voltage range
- ±1% reference voltage (line, load, temperature, and rad)
- Redundancy/junction isolation: exceptional SET performance
- Excellent transient response
- High efficiency >90%
- Two ISL73002SEH synchronization, inverted-phase
- Comparator input for enable and power-good
- Input undervoltage, output undervoltage, and adjustable output overcurrent protection
- QML qualified per MIL-PRF-38535
- Full military temperature range operation (-55 °C to +125 °C)
- Radiation environment
- LDR (0.01rad(Si)/s): 50krad(Si)
- SEE hardness
- SEL and SEB LETTH 86.4MeV/mg/cm2
- SEFI LETTH 43MeV/mg/cm2
- SET LETTH 86.4MeV/mg/cm2
Applications
Applications
- FPGA, CPLD, DSP, CPU core and I/O voltages
- Low-voltage, high-density distributed power systems
Design & Development
Boards & Kits
Boards & Kits
Differential Remote Sensing Evaluation Board
The ISL70002SEHEVAL3Z evaluation board is designed to demonstrate the features of the ISL70002SEH or ISL73002SEH, TID and SEE hardened 22A synchronous buck regulator...
Featured Documents:
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
Product Options
Processing table
| CQFP | Tray | 25 | 5962R1220201VXC | ||
| CQFP | Tray | 25 | 5962R1220201VYC | ||
| DIE | 10 | 5962R1220201VYC | |||
| CQFP | Tray | 1 | |||
| CQFP | Tray | 1 | |||
| DIE | 5 |
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