Medium current, high performance, low voltage PNP transistor
Features
■ Very low collector to emitter saturation voltage
■ DC current gain, h
■ 3 A continuous collector current
■ 40 V breakdown voltage V
Applications
FE
> 100
(BR)CER
STX790A
■ Power management in portable equipment
■ Voltage regulation in bias supply circuits
■ Switching regulator in battery charger
TO-92
TO-92AP
applications
■ Heavy load driver
Figure 1. Internal schematic diagram
Description
The devices are manufactured in low voltage PNP
planar technology by using a “Base Island” layout.
The resulting transistor shows exceptional high
gain performance coupled with very low
saturation voltage. The STX790AG-AP is supplied
using halogen-free molding compound.
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Table 1. Device summary
Order codes Marking Packages Packaging
STX790A X790A TO-92 Bulk
STX790A-AP X790A TO-92 AP Ammopack
STX790AG-AP X790AG TO-92 AP Ammopack
April 2009 Doc ID 9406 Rev 4 1/10
www.st.com
10
Electrical ratings STX790A
1 Electrical ratings
Table 2. Absolute maximum ratings
Symbol Parameter Value Unit
V
V
V
V
I
P
T
Collector-base voltage (IE = 0) -40 V
CBO
Collector-emitter voltage (R
CER
Collector-emitter voltage (IB = 0) -30 V
CEO
Emitter-base voltage (IC = 0) -5 V
EBO
I
Collector current -3 A
C
Collector peak current (tP < 5 ms) -6 A
CM
Total dissipation at T
tot
Storage temperature -65 to 150 °C
stg
T
Max. operating junction temperature 150 °C
J
amb
BE
= 47 Ω)
-40 V
= 25 °C 0.9 W
Table 3. Thermal data
Symbol Parameter Value Unit
R
thj-case
R
thj-amb
Thermal resistance junction-case _max
Thermal resistance junction-ambient __ max
44.6
139
°C/W
°C/W
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STX790A Electrical characteristics
2 Electrical characteristics
(T
= 25 °C unless otherwise specified)
case
Table 4. Electrical characteristics
Symbol Parameter Test conditions Min. Typ. Max. Unit
= -30 V
I
CBO
I
EBO
Collector cut-off current
= 0)
(I
E
Emitter cut-off current
(IC = 0)
V
CB
= -30 V; TC = 100 °C
V
CB
V
= -4 V
EB
-10
-100µAµA
-10 µA
V
(BR)CEO
(1)
V
(BR)CER
(1)
Collector-emitter
breakdown voltage
= 0)
(I
B
Collector-emitter
breakdown voltage
= 47 Ω)
(R
BE
= -10 mA
I
C
= -10 mA
I
C
-30 V
-40 V
Collector-base
V
(BR)CBO
V
(BR)EBO
V
CE(sat)
V
BE(sat)
V
BE(on)
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h
FE
breakdown voltage
= 0)
(I
E
Emitter-base breakdown
voltage (IC = 0)
Collector-emitter
(1)
saturation voltage
Base-emitter saturation
(1)
voltage
(1)
Base-emitter on voltage
(1)
DC current gain
= -100 µA
I
C
= -100 µA
I
E
= -0.5 A IB = -5 mA
I
C
= -1.2 A IB = -20 mA
I
C
= -2 A IB = -20 mA
I
C
= -3 A IB = -100 mA
I
C
I
= -3 A IB = -100 mA
C
= 100 °C
T
C
= -1A IB = -10mA
I
C
I
= -1A V
C
I
= -10mA V
C
= -500mA V
I
C
I
= -1A V
C
= -2A V
I
C
= -3A V
I
C
CE
CE
CE
CE
CE
CE
= -2V
= -2V
= -2V
= -2V
= -1V
= -1V
-40 V
-5 V
-0.15
-0.25
-0.5
-0.7
-0.9
-0.8 -1 V
-0.8 -1 V
100
100
200
200
400
400
100
90
160
130
100
V
V
V
V
V
Doc ID 9406 Rev 4 3/10
Electrical characteristics STX790A
Table 4. Electrical characteristics (continued)
Symbol Parameter Test conditions Min. Typ. Max. Unit
= -50 mA V
I
f
t
Transition frequency
C
f = 50 MHz
Resistive load
t
d
t
r
t
s
t
f
Delay time
Rise time
Storage time
Fall t ime
= -3 A V
I
C
= -I
I
B1
B2 =
see Figure 8
-60 mA
1. Pulse duration = 300 µs, duty cycle ≤ 1.5%
2.1 Electrical characteristics (curves)
Figure 2. DC current gain Figure 3. DC current gain
CE
CC
= -5 V
= -20 V
100 MHz
180
160
250
80
220
210
300
100
ns
ns
ns
ns
Figure 4. Collector-emitter saturation
voltage
Figure 5. Base-emitter saturation
voltage
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4/10 Doc ID 9406 Rev 4
STX790A Electrical characteristics
Figure 6. Switching time resistive load Figure 7. Switching time resistive load
2.2 Test circuit
Figure 8. Resistive load switching test circuit
1. Fast electronic switch
2. Non-inductive resistor
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Doc ID 9406 Rev 4 5/10
Package mechanical data STX790A
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.
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6/10 Doc ID 9406 Rev 4
STX790A Package mechanical data
TO-92 bulk shipment mechanical data
DIM.
MIN. TYP MAX.
mm.
A4.324.95
b 0.36 0.51
D 4.45 4.95
E 3.30 3.94
e 2.41 2.67
e1 1.14 1.40
L 12.70 15.49
R 2.16 2.41
S10.92 1.52
W 0.41 0.56
V5
o
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0102782 D
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Package mechanical data STX790A
TO-92 ammopack shipment (suffix”-AP”) mechanical data
Dim.
Min Typ Max
mm
A1 4.80
T 3.80
T1 1.60
T2 2.30
d 0.48
P0 12.50 12.70 12.90
P2 5.65 6.35 7.05
F1,F2 2.44 2.54 2.94
F3 4.98 5.08 5.48
delta H -2.00 2.00
W17.50 18.00 19.00
W0 5.70 6.00 6.30
W1 8.50 9.0 0 9.25
W2 0.50
H18.50 20.50
H3 0.5 1 1.5
H0 15.50 16.00 16.50
H1 25.00
D0 3.804.004.20
t 0.90
L 11.00
I1 3.00
delta P -1.00 1.00
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0050910S
8/10 Doc ID 9406 Rev 4
STX790A Revision history
4 Revision history
Table 5. Document revision history
Date Revision Changes
24-Mar-2003 1 Initial release.
29-Mar-2006 2 New template.
25-Jun-2008 3 Updated TO-92 mechanical data.
28-Apr-2009 4 Added new order code STX790AG-AP Table 1 on page 1.
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Doc ID 9406 Rev 4 9/10
STX790A
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