Semiconductor Components Industries, LLC, 2002
October, 2002 Rev. 1
1
Publication Order Number:
MBR120LSFT1/D
MBR120LSFT1
Surface Mount
Schottky Power Rectifier
Plastic SOD123 Package
. . . using the Schottky Barrier principle with a large area
metaltosilicon power diode. Ideally suited for low voltage, high
frequency rectification or as free wheeling and polarity protection
diodes in surface mount applications where compact size and weight
are critical to the system. This package also provides an easy to work
with alternative to leadless 34 package style. Because of its small size,
it is ideal for use in portable and battery powered products such as
cellular and cordless phones, chargers, notebook computers, printers,
PDAs and PCMCIA cards. Typical applications are ac/dc and dcdc
converters, reverse battery protection, and "Oring" of multiple supply
voltages and any other application where performance and size are
critical. These stateoftheart devices have the following features:
Guardring for Stress Protection
Low Forward Voltage
125
C Operating Junction Temperature
Epoxy Meets UL94, V0 at 1/8
Package Designed for Optimal Automated Board Assembly
ESD Ratings: Machine Model, C
ESD Ratings:
Human Body Model, 3B
Mechanical Characteristics
Reel Options: MBR120LSFT1 = 3,000 per 7
reel/8 mm tape
Reel Options:
MBR120LSFT3 = 10,000 per 13
reel/8 mm tape
Device Marking: L2L
Polarity Designator: Cathode Band
Weight: 11.7 mg (approximately)
Case: Epoxy, Molded
Finish: All External Surfaces Corrosion Resistant and Terminal
Leads are Readily Solderable
Lead and Mounting Surface Temperature for Soldering Purposes:
260
C Max. for 10 Seconds
Device
Package
Shipping
ORDERING INFORMATION
MBR120LSFT1
SOD123FL
SOD123FL
CASE 498
PLASTIC
3000/Tape & Reel
SCHOTTKY BARRIER
RECTIFIER
1.0 AMPERES
20 VOLTS
MBR120LSFT3
SOD123FL 10,000/Tape & Reel
DEVICE MARKING
L2L
D
L2L
= Specific Device Code
D
= Date Code
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MBR120LSFT1
http://onsemi.com
2
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Peak Repetitive Reverse Voltage
Working Peak Reverse Voltage
DC Blocking Voltage
V
RRM
V
RWM
V
R
20
V
Average Rectified Forward Current (At Rated V
R
, T
L
= 115
C)
I
O
1.0
A
Peak Repetitive Forward Current
(At Rated V
R
, Square Wave, 100 kHz, T
L
= 110
C)
I
FRM
2.0
A
NonRepetitive Peak Surge Current
(NonRepetitive peak surge current, halfwave, single phase, 60 Hz)
I
FSM
50
A
Storage Temperature
T
stg
55 to 150
C
Operating Junction Temperature
T
J
55 to 125
C
Voltage Rate of Change (Rated V
R
, T
J
= 25
C)
dv/dt
10,000
V/
m
s
THERMAL CHARACTERISTICS
Thermal Resistance JunctiontoLead (Note 1)
Thermal Resistance JunctiontoLead (Note 2)
Thermal Resistance JunctiontoAmbient (Note 1)
Thermal Resistance JunctiontoAmbient (Note 2)
R
tjl
R
tjl
R
tja
R
tja
26
21
325
82
C/W
1. Mounted with minimum recommended pad size, PC Board FR4.
2. Mounted with 1 in. copper pad (Cu area 700 mm
2
).
ELECTRICAL CHARACTERISTICS
Maximum Instantaneous Forward Voltage (Note 3), See Figure 2
V
F
T
J
= 25
C
T
J
= 85
C
V
(I
F
= 0.1 A)
(I
F
= 1.0 A)
(I
F
= 3.0 A)
0.34
0.45
0.65
0.26
0.415
0.67
Maximum Instantaneous Reverse Current (Note 3), See Figure 4
I
R
T
J
= 25
C
T
J
= 85
C
mA
(V
R
= 20 V)
(V
R
= 10 V)
0.40
0.10
25
18
3. Pulse Test: Pulse Width
250
s, Duty Cycle
2%.
I
F
, INST
ANT
ANEOUS FOR
W
ARD CURRENT (AMPS)
i
F
, INST
ANT
ANEOUS FOR
W
ARD CURRENT (AMPS)
Figure 1. Typical Forward Voltage
Figure 2. Maximum Forward Voltage
0.1
v
F
, INSTANTANEOUS FORWARD VOLTAGE (VOLTS)
10
1.0
V
F
, MAXIMUM INSTANTANEOUS FORWARD VOLTAGE
(VOLTS)
0.1
0.7
0.3
0.5
0.9
T
J
= 85
C
T
J
= 125
C
T
J
= 40
C
T
J
= 25
C
0.1
10
1.0
0.1
0.7
0.3
0.5
0.9
T
J
= 85
C
T
J
= 125
C
T
J
= 25
C
MBR120LSFT1
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3
I
R
, MAXIMUM REVERSE CURRENT (AMPS)
I
R
, REVERSE CURRENT (AMPS)
Figure 3. Typical Reverse Current
Figure 4. Maximum Reverse Current
20
0
V
R
, REVERSE VOLTAGE (VOLTS)
100E3
10E3
1.0E3
100E6
10E6
1.0E6
V
R
, REVERSE VOLTAGE (VOLTS)
5.0
10
15
20
0
1.0E+0
100E6
10E6
5.0
10
15
T
J
= 125
C
T
J
= 85
C
T
J
= 25
C
T
J
= 85
C
T
J
= 25
C
100E3
10E3
1.0E3
I
O
, A
VERAGE FOR
W
ARD CURRENT (AMPS)
Figure 5. Current Derating
T
L
, LEAD TEMPERATURE (
C)
45
25
1.8
1.2
1.0
0.6
0.2
0
85
105
145
0.8
65
125
0.4
P
FO
, A
VERAGE POWER DISSIP
A
TION (W
A
TTS)
I
pk
/I
o
= 5
Figure 6. Forward Power Dissipation
I
O
, AVERAGE FORWARD CURRENT (AMPS)
0.2
0
0.7
0.6
0.5
0.3
0.1
0
1.0
0.4
0.8
1.2
1.6
0.4
SQUARE
WAVE
dc
I
pk
/I
o
=
p
I
pk
/I
o
= 10
I
pk
/I
o
= 20
0.6
1.4
0.2
1.4
1.6
I
pk
/I
o
= 20
I
pk
/I
o
= 10
I
pk
/I
o
= 5
I
pk
/I
o
=
p
SQUARE
WAVE
dc
freq = 20 kHz
MBR120LSFT1
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4
C, CAP
ACIT
ANCE (pF)
12
0
V
R
, REVERSE VOLTAGE (VOLTS)
1000
100
10
6.0
2.0
4.0
8.0
10
T
J
= 25
C
20
14
16
18
Figure 7. Capacitance
T
J
, DERA
TED OPERA
TING
TEMPERA
TURE (
C)
12
0
V
R
, DC REVERSE VOLTAGE (VOLTS)
125
100
65
6.0
2.0
4.0
8.0
10
20
14
16
18
Figure 8. Typical Operating Temperature
Derating*
* Reverse power dissipation and the possibility of thermal runaway must be considered when operating this device under any re-
verse voltage conditions. Calculations of T
J
therefore must include forward and reverse power effects. The allowable operating
T
J
may be calculated from the equation:
T
J
= T
Jmax
r(t)(Pf + Pr) where
r(t) = thermal impedance under given conditions,
Pf = forward power dissipation, and
Pr = reverse power dissipation
This graph displays the derated allowable T
J
due to reverse bias under DC conditions only and is calculated as T
J
= T
Jmax
r(t)Pr,
where r(t) = Rthja. For other power applications further calculations must be performed.
70
75
80
85
90
95
105
110
115
120
R
q
JA
= 25.6
C/W
400
C/W
324.9
C/W
235
C/W
130
C/W
r(t), TRANSIENT THERMAL RESIST
ANCE
Figure 9. Thermal Response
1000
0.1
0.00001
t
1
, TIME (sec)
1000
1
0.0001
0.001
0.01
1
10
100
0.000001
0.1
10
100
P
(pk)
t
1
t
2
DUTY CYCLE, D = t
1
/t
2
q
JA = 321.8
C/W
Test Type > Min Pad < Die Size 38x38 @ 75% mils
D = 0.5
SINGLE PULSE
0.2
0.1
0.05
0.01
MBR120LSFT1
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5
PACKAGE DIMENSIONS
SOD123LF
CASE 49801
ISSUE O
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE MOLD
FLASH.
4. DIMENSIONS D AND J ARE TO BE MEASURED
ON FLAT SECTION OF THE LEAD: BETWEEN 0.10
AND 0.25 MM FROM THE LEAD TIP.
DIM
MIN
MAX
MIN
MAX
INCHES
MILLIMETERS
A
1.50
1.80
0.059
0.071
B
2.50
2.90
0.098
0.114
C
0.90
1.00
0.039
D
0.70
1.10
0.028
0.043
E
0.55
0.95
0.022
0.037
H
0.00
0.10
0.000
0.004
J
0.10
0.20
0.004
0.008
K
3.40
3.80
0.134
0.150
L
0
8
0
8
0.035
A
B
K
D
C
H
E
L
J
L
POLARITY INDICATOR
OPTIONAL AS NEEDED
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