DISCONTINUED PRODUCT
-- For reference only
Schottky barrier diodes combine high rectification efficiency with
high switching speeds and low series resistance. The A8920SLR dual-
diode is designed specifically for hard-disk drive applications requiring
low voltage drop rectification of the spindle motor back-EMF during
power-down head retraction. It is supplied in a 3-lead small-outline
transistor package (SOT-23/TO-236AB) for surface-mounting for use
over the operating temperature range of -20
C to +85
C.
FEATURES
s
Low Forward Voltage Drop 440 mV Typical at 150 mA
s
500 mA Forward Current
s
20 V Reverse Voltage
8920
DUAL SCHOTTKY DIODE
Always order by complete part number:
A8920SLR .
ABSOLUTE MAXIMUM RATINGS
at T
A
=+25
C
Forward Current, I
F
.......................... 500 mA
Reverse Voltage, V
R
.............................. 20 V
Operating Temperature Range,
T
A
.................................. -20
C to +85
C
Storage Temperature Range,
T
S
................................ -65
C to +150
C
TYPICAL APPLICATION
Data Sheet
29801.10
1
2
3
Dwg. PD-002
Dwg. ED-002A
V
DD
8920
DUAL SCHOTTKY DIODE
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
ELECTRICAL CHARACTERISTICS at T
A
= +25
C (unless otherwise specified).
Limits
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Units
Reverse Breakdown Voltage
V
(BR)
I
R
= 100
A
20
--
--
V
Reverse Leakage Current
I
R
V
R
= 10 V
--
1.6
20
A
Forward Voltage
V
F
I
F
= 50 mA
--
346
400
mV
I
F
= 150 mA
--
440
500
mV
Junction Capacitance
C
T
V
R
= 0 V, f = 1 MHz
--
370
--
pF
Reverse Recovery Time
t
rr
I
F
= I
R
= 100 mA
--
32
--
ns
TYPICAL CHARACTERISTICS
Copyright 1991, 1995 Allegro MicroSystems, Inc.
Allegro MicroSystems, Inc. reserves the right to make, from time to
time, such departures from the detail specifications as may be required
to permit improvements in the design of its products.
The information included herein is believed to be accurate and
reliable. However, Allegro MicroSystems, Inc. assumes no responsibil-
ity for its use; nor for any infringements of patents or other rights of third
parties which may result from its use.
0
5.0
10
1.0
3.0
REVERSE VOLTAGE IN VOLTS
10
0.1
Dwg. GD-004
REVERSE CURRENT IN
A
0.3
15
20
T = 0
C
A
T = +75
C
A
T = +25
C
A
30
100
0.1
1.0
10
300
400
FORWARD CURRENT IN mA
500
100
Dwg. GD-003
FORWARD VOLTAGE IN mV
600
200
100
1 k
T
A
= +25
C
T
A
= 0
C
T
A
= +75
C
50
75
100
125
150
100
0
ALLOWABLE PACKAGE POWER DISSIPATION IN mW
AMBIENT TEMPERATURE IN
C
250
200
150
25
Dwg. GD-002
50
R = 575
C/W
JA
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