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Low voltage fast-switching PNP power transistor
Features
■ Very low collector-emitter saturation voltage
■ High current gain characteristic
■ Fast switching speed
■ Surface mounting device in medium power
SOT-223 package
STN951
4
3
2
1
Applications
■ Emergency lighting
■ Voltage regulators
■ Relay drivers
■ High efficiency low voltage switching
applications
Description
The device is manufactured in PNP planar
technology by using a “Base Island” layout. The
resulting transistor shows exceptional high gain
performances coupled with very low saturation
voltage.
SOT-223
Figure 1. Internal schematic diagram
Table 1. Device summary
Order codes Marking Package Packaging
STN951 N951 SOT-223 Tape and reel
October 2008 Rev 3 1/8
www.st.com
8
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STN951
Contents
1 Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
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STN951 Electrical ratings
1 Electrical ratings
Table 2. Absolute maximum rating
Symbol Parameter Value Unit
V
V
V
I
I
P
T
Collector-base voltage (IE = 0) -60 V
CBO
Collector-emitter voltage (IB = 0) -60 V
CEO
Emitter-base voltage (IC = 0) -6 V
EBO
I
Collector current -5 A
C
Collector peak current (tP < 5 ms) -10 A
CM
I
Base current -1 A
B
Base peak current (tP < 5 ms) -2 A
BM
Total dissipation at T
tot
Storage temperature -65 to 150 °C
stg
T
Max. operating junction temperature 150 °C
j
= 25 °C 1.6 W
amb
Table 3. Thermal data
Symbol Parameter Value Unit
(1)
R
thj-amb
1. Device mounted on PCB area of 1cm
Thermal resistance junction-amb __max 78 °C/W
2
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Electrical characteristics STN951
2 Electrical characteristics
(T
= 25 °C unless otherwise specified)
case
Table 4. Electrical characteristics
Symbol Parameter Test conditions Min. Typ. Max. Unit
I
CBO
I
EBO
V
(BR)CBO
V
(BR)CEO
V
(BR)EBO
V
CE(sat)
V
BE(sat)
V
BE(on)
h
FE
C
CBO
Collector cut-off current
=0)
(I
E
Emitter cut-off current
=0)
(I
C
Collector-base
(1)
Breakdown voltage
(I
=0)
E
Collector-emitter
(1)
Breakdown voltage
(I
=0)
B
(1)
Emitter-base Breakdown
voltage (I
(1)
Collector-emitter
C
=0)
saturation voltage
Base-emitter saturation
(1)
voltage
(1)
Base-emitter on voltage
(1)
DC current gain
f
T
Transition frequency
Collector-base
capacitance (I
E
=0)
= -60 V
V
CB
= -5 V
V
EB
I
= -100 µA
C
I
= -10 mA
C
= -100 µA
I
E
I
= -100 mA IB = -5 mA
C
= -1 A IB = -50 mA
I
C
I
= -2 A IB = -50 mA
C
= -5 A IB = -200 mA
I
C
I
= -4 A IB = -200 mA
C
= -4 A V
I
C
I
= -10 mA V
C
= -2 A V
I
C
I
= -5 A V
C
= -10 A V
I
C
V
= -10 V IC = -100 mA
CE
= -10 V f = 1 MHz
V
CB
CE
CE
CE
CE
CE
= -1 V
= -1 V
= -1 V
= -1 V
= -1 V
-0.1 µA
-0.1 µA
-60 V
-60 V
-6 V
-10
-70
-140
-350
-50
-120
-250
-500
mV
mV
mV
mV
-1 -1.15 V
-0.89 -1 V
65
10
300
270
90
25
350
150
150
130 MHz
60 pF
Resistive load
t
on
t
s
t
f
1. Pulse duration = 300 µs, duty cycle ≤ 2 %
Turn-on time
Storage time
Fall time
I
I
4/8
= -1 A V
C
- I
B1 =
= -0.1 A
B2
CC
= -30 V
80
600
70
ns
ns
ns
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STN951 Package mechanical data
3 Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK®
packages. These packages have a Lead-free second level interconnect. The category of
second level interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at: www.st.com
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Package mechanical data STN951
SOT-223 mechanical data
DIM.
A 1.80
A1 0.02 0.1
B 0.60 0.70 0.85
B1 2.90 3.00 3.15
c 0.24 0.26 0.35
D6.30 6.50 6.70
e2.30
e1 4.60
E 3.30 3.50 3.70
H 6.70 7.00 7.30
V 10
min. typ max.
mm.
o
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0046067_L
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STN951 Revision history
4 Revision history
.
Table 5. Document revision history
Date Revision Changes
03-Oct-2006 1 Initial release.
30-Nov-2006 2 The emitter base voltage value has been modified
13-Oct-2008 3 Document status promoted from preliminary data to datasheet
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STN951
y
y
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