ISL71823ASRH: Single Event and Total Dose Hardened, High-Speed, Dual Output PWMs

The single event and total dose hardened pulse width modulators are designed to be used in high frequency, switching power supplies in either voltage or current-mode configurations. These designs include a precision voltage reference, a low power start-up circuit, a high frequency oscillator, a wide-band error amplifier, and a fast current-limit comparator.

The IS-1825ASRH, IS-1825BSRH, and IS-1825BSEH feature dual, alternating output operating from zero to less than 50% duty-cycle, while the ISL71823ASRH and ISL71823BSRH features dual, in-phase output operating from zero to less than 100% duty cycle. The “B” versions test the delay from clock out to PWM output switching after power has been applied to the modulator (tPWM). The IS-1825BSEH is wafer-by-wafer acceptance tested to 50krad(Si) at a low dose rate of 10mrad(Si)/s.

Constructed with the Intersil Rad-hard Silicon Gate (RSG) dielectrically isolated BiCMOS process, these devices are immune to single event latch-up and have been specifically designed to provide a high level of immunity to single event transients. All specified parameters are guaranteed and tested for 300krad(Si) total dose performance.

Key Features
  • Electrically screened to DLA SMD# 5962-02511
  • QML qualified per MIL-PRF-38535 requirements
  • EH version is wafer-by-wafer acceptance tested to 50krad(Si) (LDR)
  • Radiation environment
    • High dose rate (50-300rad(Si)/s): 300krad(Si)
    • Low dose rate (0.01rad(Si)/s): 50krad(Si)
    • Latch-up immune: dielectrically isolated
    • SEU immune: LET = 35MeV/mg/cm2 (max)
  • Oscillator frequency: 1MHz (max)
  • High output drive current: 1A peak (typ)
  • Low start-up current: 300µA (max)
  • Undervoltage lockout
    • Start threshold: 8.8V (max)
    • Stop threshold: 7.6V (min)
    • Hysteresis: 300mV (min)
  • Pulse-by-pulse current limiting
  • Programmable leading edge blanking
Applications
  • Voltage or current-mode switching power supplies
  • Control of high current MOSFET drivers
  • Motor speed and direction control
Typical Diagram
Application Notes
TitleTypeUpdatedSizeOther Languages
AN9867: End of Life Derating: A Necessity or Over KillPDF13 Nov 201435 KB
Datasheets
TitleTypeUpdatedSizeOther Languages
IS-1825ASRH, IS-1825BSRH, IS-1825BSEH, ISL71823ASRH, ISL71823BSRH DatasheetPDF05 Jan 2017246 KB
Standard Microcircuit Drawings
TitleTypeUpdatedSizeOther Languages
SMD 5962-02511 (IS-1825ASRH, ISL71823ASRH, IS-1825BSRH, IS-1825BSEH, ISL71823BSRH)PDF12 Jan 2015
Miscellaneous
TitleTypeUpdatedSizeOther Languages
Intersil Commercial Lab ServicesPDF18 Nov 2014364 KB
Order Information
Part NumberPackage TypeWeight(g)PinsMSL RatingPeak Temp (°C)RoHS Status
ISL71823ASRHQD16 Ld SBDIP1.3716N/ANARoHS
ISL71823ASRHQF20 Ld CFP0.8820N/ANARoHS
ISL71823ASRHVD16 Ld SBDIP1.3716N/ANARoHS
ISL71823ASRHVF20 Ld CFP0.8820N/ANARoHS
ISL71823ASRHD/PROTO16 Ld SBDIP1.3716N/ANARoHS
ISL71823ASRHF/PROTO20 Ld CFP0.8820N/ANARoHS
IS-1825ASRH, IS-1825BSRH, IS-1825BSEH, ISL71823ASRH, ISL71823BSRH Datasheet 05 Jan 2017
16 Ld SBDIP CD4098BMS
20 Ld CFP ISL71823ASRH
AN9867: End of Life Derating: A Necessity or Over Kill 13 Nov 2014
SMD 5962-02511 (IS-1825ASRH, ISL71823ASRH, IS-1825BSRH, IS-1825BSEH, ISL71823BSRH) 12 Jan 2015
Intersil Commercial Lab Services 18 Nov 2014