ST STPS1L20M User Manual
®
LOW DROP POWER SCHOTTKY RECTIFIER
Table 1: Main Product Characteristics
I
V
T
j
V
F
F(AV)
RRM
(max)
(max)
1 A
20 V
150°C
0.37 V
STPS1L20M
A
C
FEATURES AND BENEFITS
■ Very small conduction losses
■ Negligible switching losses
■ Extremely fast switching
■ Low forward voltage drop for higher efficiency
STmite
(DO216-AA)
and extented battery life
■ Low thermal resistance
■ Avalanche capability specified
DESCRIPTION
Table 2: Order Code
Part Number Marking
STPS1L20M 1L2
Single Schottky rectifier suited for switch mode
power supplies and high frequency DC to DC
converters.
Packaged in STmite, this device is intended for
use in low voltage, high frequency inverters, free
wheeling and polarity protection applications. Due
to the small size of the package this device fits
battery powered equipment (cellular, notebook,
PDA’s, printers) as well chargers and PCMCIA
cards.
Table 3: Absolute Ratings (limiting values)
Symbol Parameter Value Unit
V
RRM
I
F(RMS)
I
F(AV)
I
FSM
P
ARM
T
T
dV/dt
dPtot
* : thermal runaway condition for a diode on its own heatsink
------------- --
dTj
Repetitive peak reverse voltage 20 V
RMS forward voltage 2 A
T
Average forward current
Surge non repetitive forward current
Repetitive peak avalanche power
Storage temperature range -65 to + 150 °C
stg
Maximum operating junction temperature * 150 °C
j
Critical rate of rise of reverse voltage (rated V
1
--------------- ----------->
Rth j a–()
= 140°C δ = 0.5
c
= 10 ms sinusoidal
t
p
p
t
= 1µs Tj = 25°C
, Tj = 25°C)
R
1400 W
10000 V/µs
1A
50 A
November 2005
REV. 4
1/6
STPS1L20M
Table 4: Thermal Resistance
Symbol Parameter Value Unit
R
th(j-c)
R
th(j-l)
* Mounted with minimum recommended pad size, PC board FR4.
Table 5: Static Electrical Characteristics
Symbol Parameter Tests conditions Min. Typ Max. Unit
I
R
V
Junction to case 20 °C/W
* Junction to ambient
*
Reverse leakage current
*
Forward voltage drop
F
T
= 25°C
j
T
= 85°C
j
= 25°C VR = 10V
T
j
= 85°C
T
j
= 25°C VR = 5V
T
j
= 85°C
T
j
= 25°C
T
j
T
= 85°C
j
= 25°C
T
j
= 85°C
T
j
V
R
I
F
I
F
= V
= 1A
= 3A
0.015 0.075
RRM
0.005 0.035
0.003 0.025
250
0.9 4.5
0.45 2.5
0.3 1.6
0.38 0.43
0.32 0.37
0.46 0.53
0.42 0.49
°C/W
mA
V
Pulse test: * tp = 380 µs, δ < 2%
To evaluate the conduction losses use the following equation: P = 0.31 x I
Figure 1: Conduction losses versus average
current
P (W)
F(AV)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2
δ = 0.05
δ = 0.1
I (A)
F(AV)
δ = 0.2
δ = 0.5
δ
=tp/T
δ = 1
T
tp
+ 0.06 I
F(AV)
F2(RMS)
Figure 2: Average forward current versus
ambient temperature (δ = 0.5)
I (A)
F(AV)
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0 25 50 75 100 125 150
R =270°C/W
th(j-a)
T (°C)
amb
R=R
th(j-a) th(j-c)
2/6
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