ISL70002SEH

Radiation Hardened and SEE Hardened 12A Synchronous Buck Regulator with Current Sharing

OVERVIEW

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 TJ ≤ +150°C. The 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 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.

KEY FEATURES

  • DLA SMD 5962-12202
  • Output current for a single device
  • 14A at TJ = +125°C; 12A at TJ = +150°C
  • Output current for two paralleled devices
  • 22A at TJ = +125°C; 19A at TJ = +150°C
  • Available in a thermally enhanced heatsink package - R64.C
  • 1MHz or 500kHz switching frequency
  • 3V to 5.5V supply voltage range
  • ±1% Reference voltage (line, load, temp. and rad)
  • Prebiased 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
  • 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
  • High dose: 100krad(Si)
  • ELDRS: 100krad(Si)* *Level guaranteed by characterization; “EH” version is production tested to 50krad(Si).
  • SEE hardness
  • SEL and SEB LETTH: 86.4MeV/mg/cm2 $
  • SEFI LETTH: 43MeV/mg/cm2$
  • SET LETTH: 86.4MeV/mg/cm2

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL70002SEH
Basic Information
Production Status
Mass Production
Class
V, /PROTO
DLA SMD
5962-12202
High Dose Rate (HDR) krad (Si)
100
Low Dose Rate (ELDRS) krad (Si)
100
SEL (MeV/mg/cm2)
86.4
SMD URL
Qualification Level
QML Class V (space)
Temperature Range
-55 to +125

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