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Low voltage fast-switching NPN power transistor
Features
■ Very low collector-emitter saturation voltage
■ High current gain characteristic
■ Fast switching speed
■ Miniature SOT-23 plastic package for surface
mounting circuits
2STR1230
3
2
1
Applications
■ LED
■ Motherboard & hard disk drive
■ Mobile equipment
■ DC-DC converter
■ Voltage regulation
Description
The device is a NPN transistor manufactured
using new “PB-HCD” (power bipolar high current
density) technology. The resulting transistor
shows exceptional high gain performances
coupled with very low saturation voltage.
The complementary PNP is the 2STR2230.
SOT-23
Figure 1. Internal schematic diagram
Table 1. Device summary
Order code
2STR1230 130 SOT-23 Tape and reel
2STR1230G 130G SOT-23 Tape and reel
1. The letter "G" in the order code suffix identifies the product as ECOPACK®2 grade. Please see Section 3 for details.
October 2009 Doc ID 12555 Rev 3 1/9
(1)
Marking Package Packing
www.st.com
9
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Electrical ratings 2STR1230
1 Electrical ratings
Table 2. Absolute maximum ratings
Symbol Parameter Value Unit
V
V
V
I
P
T
Collector-emitter voltage (VBE = 0) 30 V
CES
Collector-emitter voltage (IB = 0) 30 V
CEO
Emitter-base voltage (IC = 0) 5 V
EBO
I
Collector current 1.5 A
C
Collector peak current (tP < 5 ms) 3 A
CM
Total dissipation at T
tot
Storage temperature -65 to 150 °C
stg
Max. operating junction temperature 150 °C
T
J
= 25 °C 0.5 W
amb
Table 3. Thermal data
Symbol Parameter Value Unit
(1)
R
thJA
1. Device mounted on PCB area of 1 cm².
Thermal resistance junction-ambient __max 250 °C/W
2/9 Doc ID 12555 Rev 3
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2STR1230 Electrical characteristics
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
Collector cut-off current
(IE = 0)
Emitter cut-off current
= 0)
(I
C
= 30 V 0.1 µA
V
CB
= 4 V 0.1 µA
V
EB
Collector-base
V
(BR)CBO
V
(BR)CEO
V
(BR)EBO
V
CE(sat)
V
BE(sat)
h
FE
breakdown voltage
= 0)
(I
E
Collector-emitter
(1)
breakdown voltage
= 0)
(I
B
Emitter-base breakdown
voltage (I
Collector-emitter
(1)
C
saturation voltage
Base-emitter saturation
(1)
voltage
(1)
DC current gain
= 0)
I
= 100 µA 30 V
C
I
= 10 mA 30 V
C
= 100 µA 5 V
I
E
= 0.1 A IB = 1 mA
I
C
= 1 A IB = 100 mA
I
C
IC = 2 A IB = 200 mA
= 1A IB = 100mA 1.25 V
I
C
I
= 50 mA V
C
= 0.5 A V
I
C
= 1 A V
I
C
IC = 2 A V
C
CBO
Collector-base
capacitance (I
= 0)
E
Resistive load
t
on
t
off
1. Pulse test: pulse duration ≤ 300 µs, duty cycle ≤ 2 %
Turn-on time
Turn-off time
= 10 V, f = 1 MHz 5 pF
V
CB
= 1.5 A V
I
C
I
= - I
B1
= 150 mA
B2
CE
CE
CE
CE
CC
= 2 V
= 2 V
= 2 V
= 2 V
= 10 V
210
180
130
80
0.15
0.2
0.4
0.5
0.85
330 560
70
380
V
V
V
ns
ns
Doc ID 12555 Rev 3 3/9
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Electrical characteristics 2STR1230
2.1 Electrical characteristics (curves)
Figure 2. DC current gain Figure 3. Collector-emitter saturation
V
V
voltage
0.8
0.8
CE(sat)
CE(sat)
(V)
(V)
h
= 10
h
= 10
FE
0.6
0.6
0.4
0.4
0.2
0.2
0
0
FE
TJ= 25 °C
TJ= 25 °C
0.01 0.1 1 10
0.01 0.1 1 10
TJ= 125 °C
TJ= 125 °C
TJ= - 40 °C
TJ= - 40 °C
IC(A)
IC(A)
Figure 4. Base-emitter saturation
Figure 6. Resistive load switching off Figure 7. Capacitance
voltage
Figure 5. Resistive load switching on
1000
1000
C (pF)
C (pF)
f = 1 MHz
f = 1 MHz
100
100
10
10
C
C
EB
EB
4/9 Doc ID 12555 Rev 3
1
1
0.1 1 10
0.1 1 10
C
C
CB
CB
VR(V)
VR(V)
Page 5
2STR1230 Electrical characteristics
2.2 Test circuits
Figure 8. Resistive load switching test circuit
1. Fast electronic switch
2. Non-inductive resistor
Doc ID 12555 Rev 3 5/9
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Package mechanical data 2STR1230
3 Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK
®
packages, depending on their level of environmental compliance. ECOPACK®
®
is an ST trademark.
6/9 Doc ID 12555 Rev 3
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2STR1230 Package mechanical data
SOT-23 mechanical data
DIM.
min. typ max.
A0.891.4
A1 0 0.1
B0.3 0.51
C0.0850.18
D2.75 3.04
e0.851.05
e1 1.7 2.1
E1.2 1.6
H 2.1 2.75
L0.6
S 0.350.65
mm.
0053390_H
Doc ID 12555 Rev 3 7/9
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Revision history 2STR1230
4 Revision history
Table 5. Document revision history
Date Revision Changes
18-Jul-2006 1 Initial release
24-Oct-2006 2 New graphics
09-Oct-2009 3 Updated: Figure 3, Figure 7 and package mechanical data.
8/9 Doc ID 12555 Rev 3
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2STR1230
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Doc ID 12555 Rev 3 9/9
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