ST STPS140Z User Manual
®
MAIN PRODUCT CHARACTERISTICS
STPS140Z
POWER SCHOTTKY RECTIFIER
I
F
V
RRM
V
(max) 0.49 V
F
1A
40 V
Tj (max) 150°C
FEATURES AND BENEFITS
VERY SMALL CONDUCTION LOSSES
■
NEGLIGIBLE SWITCHING LOSSES
■
EXTREMELY FAST SWITCHING
■
DESCRIPTION
Single Schottky rectifier suited for Switchmode
PowerSuppliesandhighfrequencyDCtoDC converters.
Packaged in SOD-123, this device is intended for
use in low voltage, high frequency inverters, free
wheeling and polarity protection applications. Due
tothe small size of the package this device fit GSM
and PCMCIA requirements.
ABSOLUTE RATINGS(limiting values)
SOD-123
Symbol Parameter Value Unit
V
RRM
I
FSM
I
Repetitive peak reverse voltage 40 V
Continuous forward current T
F
=60°C 1 A
amb
Surge non repetitive forward current tp = 10 ms
5.5 A
Sinusoidal
I
RRM
Repetitive peak reverse current tp = 2 µs square
0.5 A
F = 1kHz
I
RSM
T
stg
Non repetitive peak reverse current tp = 100µs square 1 A
Storage temperature range - 65 to + 150 °C
Tj Maximum operating junction temperature * 150
T
Maximum temperature for soldering during 10s 260 °C
L
dV/dt Critical rate of rise of reverse voltage 10000 V/µs
dPtot
*:
<
dTj Rth j a
January 2002 - Ed: 1B
thermal runawaycondition for a diode on its own heatsink
−1()
1/5
STPS140Z
THERMAL RESISTANCES
Symbol Parameter Value Unit
R
th (j-a)
* with 50 mm2copper area (e=35µm)
Junction to ambient * 175 °C/W
STATIC ELECTRICAL CHARACTERISTICS
Symbol Tests Conditions Tests Conditions Min. Typ. Max. Unit
I
* Reverse leakage current Tj = 25°C VR=5V 10 µA
R
Tj=25°CV
= 40V 40 µA
R
Tj = 100°C 1.5 5 mA
V
** Forward voltage drop Tj = 25°CI
F
= 1A 0.55 V
F
Tj = 100°C 0.45 0.51
Pulse test : * tp=5ms,δ<2%
** tp = 380 µs, δ <2%
To evaluate the maximum conduction losses use the following equation :
P=0.2xI
F(AV)
+0.3xI
F2(RMS)
at Tj = 150°C
Fig. 1: Average forward power dissipation versus
average forward current.
PF(av)(W)
0.6
0.5
0.4
0.3
0.2
0.1
0.0
δ = 0.05
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1
2/5
δ = 0.1
δ = 0.2
IF(av) (A)
δ = 0.5
δ
=tp/T
δ = 1
T
tp
Fig. 2: Average forward current versus ambient
temperature (δ=1).
IF(av)(A)
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0 25 50 75 100 125 150
δ
=tp/T
T
tp
Tamb(°C)
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