POWER SCHOTTKY RECTIFIERS
TM
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page
1
Copyright 2003
02-03-2003 REV 0
WWW.
Microsemi
.COM
SCOTTSDALE DIVISION
USD520, USD520HR2, USD535, USD535HR2,
USD545, USD545HR2, USD550, USD550HR2
DESCRIPTION APPEARANCE
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.
DO-5
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
FEATURES APPLICATIONS / BENEFITS
• Very Low Forward Voltage (0.6V at 60A, 125oC)
• Low Recovered Charge
• Rugged Package Design (DO-5)
• Low Reverse Current (<50mA at rated VR at
125oC)
• Hermetically sealed
• High Reliability Screening Option with HR2 Suffix
(ie. USD520HR2)
• Available with Flexible Top Lead with F suffix to
part number
• 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 (0.8oC/W)
• High Surge Current (1000A)
ABSOLUTE MAXIMUM RATINGS MECHANICAL AND PACKAGING
• DC Blocking Voltage VR: Same as VRWM (see below)
• Peak Repetitive Forward Current IFRM: 150 A
@ TC = 115 oC (Rated VR, Sq Wave, 20 kHz, 50 % Duty Cycle)
• Average Forward Current, IF(AV): 75 A @ TC = 115 oC
• Non-Repetitive Peak Surge Current (8.3 ms), IFSM: 1000 A
• Peak Reverse Transient Current, IRM: 2 A
• Storage Temperature Range, TSTG: -55oC to +200oC
• Operating Junction Temperature TJ(PK): 175 oC
• Thermal Resistance, Junction to Case, R?JC: 0.8oC/W
• 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)
Maximum
Forward
Voltage
VF
Maximum Reverse
Current (pulsed)*
IR @ VRWM
Microsemi Part Number
Working
Peak
Reverse
Voltage
VRWM
Non
Repetitive
Peak
Reverse
Voltage
VRSM
@ IRM
@10 A,
25oC @60 A,
25oC @60 A,
125 oC @TC =
25oC @TC =
125oC
Maximum
Capacitance
@VR = 5.0 V
USD520
USD535
USD545
USD550
USD520HR2
USD535HR2
USD545HR2
USD550HR2
20 V
35 V
45 V
50 V
24 V
42 V
54 V
60 V
0.50 V
0.68 V
0.60 V or
0.63 V with
flexible
lead option
20 mA
50 mA
50 mA
50 mA
75 mA 4000 pF
* Duty Cycle = 1%
ELECTRICAL CHARACTERISTICS (TCASE = 25oC)
USD520 thru USD550
POWER SCHOTTKY RECTIFIERS
TM
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page
2
Copyright 2003
02-03-2003 REV 0
WWW.
Microsemi
.COM
SCOTTSDALE DIVISION
USD520, USD520HR2, USD535, USD535HR2,
USD545, USD545HR2, USD550, USD550HR2
OUTLINE AND CIRCUIT
OPTIONAL HIGH RELIABILITY (HR2) SCREENING
The following tests are performed on 100% of the devices.
SCREEN MIL-STD-750
METHOD CONDITIONS
1. High Temperature 1032 24 Hours @ TA = 150oC
2. Temperature Cycle 1051 F, 20 Cycles, -55 to +150oC. No dwell required @
25oC, T>10 min. @ extremes
3. Hermetic Seal
a. Fine Leak
b. Gross Leak
1071
H, Helium
C, Liquid
4. Thermal Impedance 3101
5. Interim Electrical Parameters GO/NO GO As Applicable
6. High Temperature Reverse Blocking As Applicable T=48 hrs, Tc=125°C with applicable bias conditions
7. Final Electrical Parameters GO/NO GO As Applicable
USD520 thru USD550
POWER SCHOTTKY RECTIFIERS
TM
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page
3
Copyright 2003
02-03-2003 REV 0
WWW.
Microsemi
.COM
SCOTTSDALE DIVISION
USD520, USD520HR2, USD535, USD535HR2,
USD545, USD545HR2, USD550, USD550HR2
MECHANICAL SPECIFICATIONS
INCHES MILLIMETERS
A .225 +/- .005 5.72 +/- 0.13
B .060 MIN. 1.52 MIN.
C .156 +/- .020 3.96 +/- 0.51
D .156 MIN. FLAT 3.96 MIN. FLAT
E .667 DIA. MAX 16.94 DIA. MAX.
F .090 MAX 2.29 MAX.
G .677 +/- .010 17.20 +/- 0.25
H .375 MAX. 9.53 MAX.
J .140 MIN. DIA. 3.56 MIN. DIA.
K 1.000 MAX. 25.40 MAX.
L .450 MAX. 11.43 MAX.
M .438 +/- .015 11.13 +/- 0.38
N .078 MAX. 1.98 MAX.
FLEXIBLE TOP LEAD (OPTIONAL) Add an “F” suffix to Part Number.
INCHES MILLIMETERS
M .718 MAX 18.24 MAX
N 4.50 +/- .250 114.3 +/- 6.35
P .525 MAX. 13.23 MAX.
Q .675 +/- .035 17.15 +/- 0.89
R .205 +/- .005 5.21 +/- 0.13
S .075 +/- .010 1.91 +/- 0.25
T 1.125 MAX. 28.58 MAX.
*To 125oC (Ambient)
Note: Consult Factory for Non-standard Lead Lengths. DO-5 with Flexible Lead
USD520 thru USD550
Notes:
1. Cathode is stud
2. Maximum unlubricated stud torque: 30 inch pounds.
3. Angular Orientation of terminal is undefined.
4. Maximum tension (90 o) anode terminal 15 pounds for 30
seconds
