Model: 4690A-S28

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4690A-S28

2.5W Proton Rad Hard 100K+® DC – DC Converters

Features

  • RadHard TID >100kRad(Si)
  • No SEE: LET > 82meV*cm^2/mg
  • Proton Resistant: No optocouplers used
  • Completely self contained Thick Film Hybrid DC-DC Converter
  • No External Filter Caps required

Specifications

  • Input: 28 VDC to VDC
  • Input Range (Continuous): 16 VDC to 40 VDC
  • Isolation Input to Case: 500 VDC to VDC
  • Isolation Input to Output: 500 VDC to VDC
  • Isolation Output to Case: 100 VDC to VDC
  • Storage Temp: -55 °C to +150 °C
  • Shock: 50 G's to G's
  • Acceleration: 500 G's to G's
  • Vibration: 30 G's to G's
  • Weight: 50 gms typical to gms typical

Environment

    • Grade EU:
      • Full Output Power at Tcase = 85°C
      • Minimum Output Power at Tcase = -55°C
        • Linearly derates to zero at Tcase = 115

      • TID up to kRad(Si)
      • No SEE up to 60MeV*cm2/mg

    • Grade L:
      • Full Output Power at Tcase = 85°C
      • Minimum Output Power at Tcase = -55°C
        • Linearly derates to zero at Tcase = 115

      • TID up to 45kRad(Si)
      • No SEE up to 60MeV*cm2/mg

    • Grade LE:
      • Full Output Power at Tcase = 125°C
      • Minimum Output Power at Tcase = -55°C
        • Linearly derates to zero at Tcase = 135

      • TID up to 45kRad(Si)
      • No SEE up to 60MeV*cm2/mg

    • Grade S:
      • Full Output Power at Tcase = 85°C
      • Minimum Output Power at Tcase = -55°C
        • Linearly derates to zero at Tcase = 115

      • TID up to 100kRad(Si)
      • No SEE up to 60MeV*cm2/mg

    • Grade SE:
      • Full Output Power at Tcase = 125°C
      • Minimum Output Power at Tcase = -55°C
        • Linearly derates to zero at Tcase = 135

      • TID up to 100kRad(Si)
      • No SEE up to 60MeV*cm2/mg

Additional Notes

Typical no load quiescent current <15mA at 28 VDC

Typical INH (off) quiescent current <800uA

Single Output Devices

Toggle Columns: Parameter - Conditions
Parameters Conditions 4690A-S28 (2.5W) MIN 4690A-S28 (2.5W) TYP 4690A-S28 (2.5W) MAX
Output set voltage +27.8 +28.0 +28.2
Output current Vin min — Vin max 9.0mA 90.0mA
Efficiency Pout = max rated load 80% 86%
Line regulation Pout = max rated load
Vin min — Vin max
100mV 400mV
Load regulation Pout = 10% to F.L. 600mV 1.20V
Output ripple F.L. BW 2 MHz
mVpp
150 350

Pinout Table

4690A-Sxx ≥24V
Pin-1: BIT
Pin-2: Inhibit Not
Pin-3: Soft Start
Pin-4: Sync
Pin-5: Case
Pin-6: Input Return
Pin-7: + Input
Pin-8: N/C
Pin-9: N/C
Pin-10: Main Output
Pin-11: N/C
Pin-12: Main Output Return

Case Styles

Part Number Designator Case Style Pin Count Mounting Step File
2 Case Style 2 12 Solder Sealed Flangelss PCB Mount
F Case Style 3 12 Solder Sealed Flanged PCB Mount
G Case Style 5 12 Seam Weld Flangeless PCB Mount Download
GF Case Style 6 12 Seam Weld Flanged PCB Mount Download
UF Case Style 8 12 Seam Weld Flanged Chassis Mount Download