Data Sheet
29801.10
8920
DUAL SCHOTTKY DIODE
1
3
Schottky barrier diodes combine high rectification efficiency with
high switching speeds and low series resistance. The A8920SLR dualdiode 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
2
Dwg. PD-002
T
C
U
D
O
y
R
l
P on
■ Low Forward Voltage Drop 440 mV Typical at 150 mA
■ 500 mA Forward Current
■ 20 V Reverse Voltage
TYPICAL APPLICATION
D
e
c
E
n
U
e
r
N
e
I
f
e
T
r
N
r
o
O
F
C
S —
I
D
VDD
Dwg. ED-002A
ABSOLUTE MAXIMUM RATINGS
at TA=+25°C
Forward Current, IF .......................... 500 mA
Reverse Voltage, VR .............................. 20 V
Operating Temperature Range,
TA .................................. -20°C to +85°C
Storage Temperature Range,
TS ................................ -65°C to +150°C
Always order by complete part number:
A8920SLR .
8920
DUAL SCHOTTKY DIODE
ELECTRICAL CHARACTERISTICS at TA= +25°C (unless otherwise specified).
Limits
Characteristic
Symbol
Reverse Breakdown Voltage
Test Conditions
V(BR)
Min.
Typ.
Max.
Units
IR = 100 µA
20
—
—
V
Reverse Leakage Current
IR
VR = 10 V
—
1.6
20
µA
Forward Voltage
VF
IF = 50 mA
—
346
400
mV
IF = 150 mA
—
440
500
mV
Junction Capacitance
CT
VR = 0 V, f = 1 MHz
—
370
—
pF
Reverse Recovery Time
trr
IF = IR = 100 mA
—
32
—
ns
TYPICAL CHARACTERISTICS
FORWARD VOLTAGE IN mV
500
400
300
TA = +25°C
TA = 0°C
200
TA = +75°C
100
0.1
1.0
10
100
1k
FORWARD CURRENT IN mA
Dwg. GD-003
100
TA = +75°C
250
200
RθJA = 575°C/W
150
100
50
0
25
30
REVERSE CURRENT IN µ A
ALLOWABLE PACKAGE POWER DISSIPATION IN mW
600
50
75
100
125
AMBIENT TEMPERATURE IN °C
150
Dwg. GD-002
10
3.0
TA = +25°C
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.
1.0
0.3
The information included herein is believed to be accurate and
reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringements of patents or other rights of third
parties which may result from its use.
TA = 0°C
0.1
0
5.0
10
15
20
REVERSE VOLTAGE IN VOLTS
Dwg. GD-004
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1991, 1995 Allegro MicroSystems, Inc.