USD520_03 Datasheet, PDF (1/3 Pages) Microsemi Corporation – POWER SCHOTTKY RECTIFIERS

SCOTTSDALE DIVISION
USD520, USD520HR2, USD535, USD535HR2,
USD545, USD545HR2, USD550, USD550HR2
POWER SCHOTTKY RECTIFIERS^TM
DESCRIPTION
This series of 75 Amp rated average forward current series of Schottky
barrier power rectifiers in 20 through 50 volt selections 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
with applicable heat sinking for peak repetitive forward currents up to 150
Amps at 50% duty cycle. This rugged DO-5 hermetically sealed design
absorbs stress that can otherwise damage glass-to-metal seals during
installation and operation. It is also available in a flexible top lead as
described herein.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
APPEARANCE
DO-5
FEATURES
• Very Low Forward Voltage (0.6V at 60A, 125^oC)
• Low Recovered Charge
• Rugged Package Design (DO-5)
• Low Reverse Current (<50mA at rated V_R at
125^oC)
• Hermetically sealed
• High Reliability Screening Option with HR2 Suffix
(ie. USD520HR2)
• Available with Flexible Top Lead with F suffix to
part number
ABSOLUTE MAXIMUM RATINGS
• DC Blocking Voltage V_R: Same as V_RWM (see below)
• Peak Repetitive Forward Current I_FRM: 150 A
@ T_C = 115 ^oC (Rated V_R, Sq Wave, 20 kHz, 50 % Duty Cycle)
• Average Forward Current, I_F(AV): 75 A @ T_C = 115 ^oC
• Non-Repetitive Peak Surge Current (8.3 ms), I_FSM: 1000 A
• Peak Reverse Transient Current, I_RM: 2 A
• Storage Temperature Range, T_STG: -55^oC to +200^oC
• Operating Junction Temperature T_J(PK): 175 ^oC
• Thermal Resistance, Junction to Case, R_?JC: 0.8^oC/W
APPLICATIONS / BENEFITS
• Output Schottky Rectifiers for Low Voltage Power
Supplies
• Catch Diodes for Low Voltage Power Supplies
• High Efficiency for Low Voltage Supplies
• Robust Construction with Heavy Copper Top Post
and Four-Point Crimp
• High Peak Operating Temperature
• Low Thermal Resistance (0.8^oC/W)
• High Surge Current (1000A)
MECHANICAL AND PACKAGING
• Industry Standard DO-5 (DO-203AB) Package with
11/16 inch Hex and 1/4-28 Threaded Stud
• Hermetically Sealed Metal and Glass Case Body
• Metal Surface Finish: Tin Plated
• Weight: 16 grams (approximate)
• Maximum Unlubricated Stud Torque: 30 inch pounds
• Angular Orientation of Terminal Undefined
• Marking: Part Number and Logo
• Flexible Top Lead Option: Add an “F” Suffix to Part
Number (see mechanical specifications on page 3)
ELECTRICAL CHARACTERISTICS (T_CASE = 25^oC)
Non
Maximum
Working Repetitive
Forward
Peak
Peak
Voltage
Microsemi Part Number
USD520 USD520HR2
Reverse
Voltage
V_RWM
20 V
Reverse
Voltage
V_RSM
@ I_RM
24 V
@10 A,
25^oC
V_F
@60 A,
25^oC
USD535
USD545
USD535HR2
USD545HR2
35 V
45 V
42 V
54 V
0.50 V
0.68 V
USD550 USD550HR2
50 V
60 V
* Duty Cycle = 1%
@60 A,
125 ^oC
0.60 V or
0.63 V with
flexible
lead option
Maximum Reverse
Current (pulsed)*
I_R @ V_RWM
@T_C =
25^oC
20 mA
@T_C =
125^oC
50 mA
50 mA
50 mA
75 mA
Maximum
Capacitance
@V_R = 5.0 V
4000 pF
Copyright © 2003
02-03-2003 REV 0
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, [phone], Fax: [phone]
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