ISL72991RH

Radiation Hardened Low Dropout Adjustable Negative Voltage Regulator

OVERVIEW

Radiation Hardened Low Dropout Adjustable Negative Voltage Regulator The radiation hardened ISL72991RH is a low dropout adjustable negative regulator with an output voltage range of -2.25V to -26V. The device features a 1A output current capability, an adjustable current limit pin (ILIM), and a shutdown pin (SD) for easy on/off control.

The device incorporates unique circuitry that enables precision performance across the -55°C to +125°C temperature range and post-irradiation. Specifications across the full temperature range include an internal reference voltage of -1.25V +40mV/- 50mV (maximum), line regulation of ±25mV (maximum), and load regulation of ±15mV (maximum). The reference voltage is the ADJ to GND voltage.

Constructed with the Intersil dielectrically isolated Rad Hard Silicon Gate (RSG) BiCMOS process, these devices are immune to single event latch-up and have been specifically designed to provide highly reliable performance in harsh radiation environments.

KEY FEATURES

  • Electrically screened to DLA 5962-02503
  • QML qualified per MIL-PRF-38535 requirements
  • Latch-up immune DI process
  • Wide input voltage range: -3V to -30V
  • Nominal output voltage range: -2.25V to -26V
  • Line regulation: ±25mV (maximum)
  • Load regulation: ±12mV (typ); ±15mV (maximum)
  • Dropout voltage (100mA): 0.2V (typ); 0.3V (maximum)
  • Dropout voltage (1A): 1V (maximum)
  • Minimum load current: 3.0mA
  • TTL input-level shutdown (SD); low = on
  • Operating temperature range: -55°C to +125°C
  • Radiation environment
  • SEL/SEB LETTH (VS = -30V): 86.4MeV•cm2/mg
  • Total dose, high dose rate: 300krad(Si)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL72991RH
Basic Information
Production Status
Mass Production
Class
V, Q, /PROTO
DLA SMD
5962-02503
High Dose Rate (HDR) krad (Si)
300
Low Dose Rate (ELDRS) krad (Si)
Report Available
SEL (MeV/mg/cm2)
SEL free
SMD URL
Qualification Level
QML Class Q (military), QML Class V (space)
Temperature Range
-55 to +125

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