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The radiation hardened HS-1825ARH, HS-1825AEH pulse width modulator is designed to be used in high frequency switched-mode power supplies and can be used in either current-mode or voltage-mode. It is well suited for single-ended boost converter applications.

Device features include a precision voltage reference, low power start-up circuit, high frequency oscillator, wide-band error amplifier and fast current-limit comparator. The use of proprietary process capabilities and unique design techniques results in fast propagation delay times and high output current over a wide range of output voltages.

Constructed with the Intersil radiation hardened Silicon Gate (RSG) Dielectric Isolation BiCMOS process, the HS-1825ARH, HS-1825AEH have been specifically designed to provide highly reliable performance when exposed to harsh radiation environments.

Key Features

• Electrically screened to DLA SMD # 5962-99558
• QML qualified per MIL-PRF-38535 Requirements
• Radiation environment
  • Maximum total dose: 300 krad(SI)
  • Vertical architecture provides low dose rate immunity
  • DI RSG process provides latch-up immunity
• Low start-up current: 100µA (Typical)
• Fast propagation delay: 80ns (Typical)
• 12V to 30V operation
• 1A (peak) dual output drive capability
• 5.1V reference
• Undervoltage lockout
• Programmable soft-start
• Switching frequencies to 500kHz
• Latched overcurrent comparator with full cycle restart
• Programmable leading edge blanking circuit

Applications

• Current or voltage mode switching power supplies
• Motor speed and direction control