8920
DUAL SCHOTTKY DIODE
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.
Data Sheet
29801.10
1
3
2
FEATURES
s
Low Forward Voltage Drop 440 mV Typical at 150 mA
s
500 mA Forward Current
s
20 V Reverse Voltage
Dwg. PD-002
TYPICAL APPLICATION
V
DD
Dwg. ED-002A
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
Always order by complete part number:
A8920SLR .
8920
DUAL SCHOTTKY DIODE
ELECTRICAL CHARACTERISTICS at T
A
= +25
°
C (unless otherwise specified).
Limits
Characteristic
Reverse Breakdown Voltage
Reverse Leakage Current
Forward Voltage
Symbol
V
(BR)
I
R
V
F
Test Conditions
I
R
= 100
µA
V
R
= 10 V
I
F
= 50 mA
I
F
= 150 mA
Junction Capacitance
Reverse Recovery Time
C
T
t
rr
V
R
= 0 V, f = 1 MHz
I
F
= I
R
= 100 mA
Min.
20
—
—
—
—
—
Typ.
—
1.6
346
440
370
32
Max.
—
20
400
500
—
—
Units
V
µA
mV
mV
pF
ns
TYPICAL CHARACTERISTICS
600
500
ALLOWABLE PACKAGE POWER DISSIPATION IN mW
250
FORWARD VOLTAGE IN mV
200
R
= 575°C/W
400
θJA
150
300
T
A
= 0°C
200
T
A
= +75°C
100
0.1
1.0
10
100
1k
T
A
= +25°C
100
50
FORWARD CURRENT IN mA
Dwg. GD-003
100
T = +75°C
A
30
0
25
50
75
100
125
AMBIENT TEMPERATURE IN
°C
150
REVERSE CURRENT IN
µA
Dwg. GD-002
10
3.0
T = +25°C
A
1.0
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.
10
15
20
0.3
T = 0°C
A
0.1
0
5.0
REVERSE VOLTAGE IN VOLTS
Dwg. GD-004
115 Northeast Cutoff, Box 15036
W
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1991, 1995, Allegro MicroSystems, Inc.
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