SGS Thomson Microelectronics BAT74 Datasheet
®
FEATURES AND BENE FITS
BAT74
SMALL SIGNAL SCHOTTKY DIODE
VERY SMALL CONDUCTION LOSSES
NEGLIGIBLE SWITCHING LOSSES
LOW FORWARD V O LTAGE DROP
A2
A1
A1
EXTREMELY FAST SWITCHING
K1
K2
K1
SURFACE MOUNT DEVICE
DESCRIPTION
Two separate Schottky barrier diodes encapsulated in a SOT-143 small SMD package.
ABSOLUTE RATINGS
(limiting values)
SOT-143
Symbol Parameter Value Unit
V
RRM
Repetitive peak reverse voltage 30 V
A2
K2
I
FRM
I
FSM
P
T
tot
stg
Repetitive peak forward current δ = 0.33 0.5 A
Surge non repetitive forward current (tp=10ms sinusoidal) 1 A
Power Dissipation (note 1) Tamb = 50°C 250 mW
Maximum storage temperature range - 65 to +150
Tj Maximum operating junction temperature * 150
TL Maximum temperature for soldering during 10s 260
Note 1:
Ptot is the total dissipation of both diodes
dPtot
dTj
<
* :
June 1999 - Ed: 3A
1
Rth(j−a
thermal runaway condition for a diode on its own heatsink
)
°
C
°
C
°
C
1/4
BAT74
THERMAL RESISTANCE
Symbol Parameter Value Unit
R
th (j-a)
(*) Mounted on epoxy board with recommended pad layout.
Junction to Ambient (*) 400
STATIC ELECTRICAL CHARACTE RISTICS
(per diode)
°
Symbol Parameters Tests conditions Min. Typ. Max. Unit
* Forward voltage drop Tj = 25°CI
V
F
** Reverse leakage current Tj = 25°CV
I
R
= 0.1 mA 240 mV
F
= 1 mA 320
I
F
= 10 mA 400
I
F
= 30 mA 500
I
F
= 100 mA 900
I
F
= 30 V 1
R
Tj = 100°C 100
Pulse test: * tp = 380 µs, δ < 2%
** tp = 5 ms, δ < 2%
DYNAMIC CHARACTERISTICS
(Tj = 25 °C)
C/W
µ
A
Symbol Parameters Tests conditions Min. Typ. Max. Unit
C J unction
Tj = 25°C V
= 1 V F = 1 MHz 10 pF
R
Capacitance
t
rr
Fig.1 :
average forward current.
PF(av)(W)
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0.00 0.05 0.10 0.15 0.20 0.25 0.30
Revers e Recove ry
Time
IF = 10 mA IR = 10 mA Tj = 25°C
I
= 1 mA RL = 100
rr
Average forward power dissipation versus
δ = 0.33
δ = 0.2
δ = 0.1
δ = 0.05
δ = 1
T
IF(av) (A)
δ
=tp/T
tp
5ns
Ω
Fig.2 :
Average forward current versus ambient
temperature ( δ = 0.33).
IF(av)(A)
0.20
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
0 25 50 75 100 125 150
δ
=tp/T
T
tp
Tamb(°C)
2/4
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