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

■

Low Forward Voltage Drop 440 mV Typical at 150 mA

■

500 mA Forward Current

■

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 [phone]

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

µ

A

20

—

—

V

Reverse Leakage Current

I

R

V

R

= 10 V

—

1.6

20

µ

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

µµµµ

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

θ

JA