580 Pleasant St. Watertown, MA 02472 PH: (617) 926-0404 FAX: (617) 924-1235 USD520 USD535 USD545 Features: Features: • • • • • • • Very Low Forward Voltage (0.6V at 60A, 125°°C) Low Recovered Charge Rugged Package Design (DO-5) High Efficiency for Low Voltage Supplies Low Thermal Resistance (1.0°°C/W) High Surge Current (1000A) Low Reverse Current (<50mA at rated VR at 125°°C) 150 Amp Pk, Up to 45V POWER SCHOTTKY RECTIFIERS Description: This series of Schottky barrier power rectifiers is ideally suited for output rectifiers and catch diodes in low voltage power supplies. The Microsemi high conductivity design, using a heavy copper top post and 4 point crimp, ensures cool thermal operation and low dynamic impedance. Rugged design absorbs stress that can damage glassto-metal seal during installation and use. DO-5 Absolute Maximum Ratings: USD520 USD535 USD545 20V 20V 24V 35V 35V 42V 45V 45V 54V Working Peak Reverse Voltage, VRWM DC Blocking Voltage, VR Peak Repetitive Surge Voltage, VRSM @ IRM Peak Repetitive Forward Current (Rated VR1 Square Wave, 20KHz, 50 percent Duty Cycle), IFRM Average Rectified Forward Current, IF(AV) Non-repetitive Peak Surge Current (8.3mS), IFSM Peak Reverse Transient Current, IR M Storage Temperature Range, TSTG Operating Junction Temperature, T j Thermal Resistance Junction-to-Case, Rθ θ JC 150A (at T C = 115°° C) 75A (at T C = 115°° C) 1000A 2A -55°° to +200°° C +175°° C 1°° C/W Electrical Characteristics (TCASE = 25°C) Characteristic Symbol Limit Units Conditions USD545 Maximum Instantaneous Reverse Current iR Maximum Instantaneous Forward Voltage VF Maximum Capacitance Maximum Voltage Rate of Change MSC0999.PDF 02-02-99 20 (50) mA 0.50 V 0.68 V Ct 0.60 4000 V pF dv/dt 1000 V/µ µS VR =VRWM (TC = 125°° C) Pulse Width = 300µ µs Duty Cycle = 1 percent iF = 10A, TC = 25°° C iF = 60A, TC = 25°° C iF = 60A, TC = 125°° C VR = 5.0V VR = rated DSWUSD520-45) <-> (35125) USD520 USD535 USD545 MECHANICAL SPECIFICATIONS: MSC0999.PDF 02-02-99 DSWUSD520-45) <-> (35125) USD520 USD535 USD545 MSC0999.PDF 02-02-99 DSWUSD520-45) <-> (35125)