STMicroelectronics-2STN2540

2STN2540  

Low voltage fast-switching PNP power bipolar transistor  

Features  

■

Very low collector-emitter saturation voltage  

■

High current gain characteristic  

■

Fast switching speed  

4

■

Surface mounting device in medium power  

3

SOT-223 package  

2

1

Applications  

SOT-223  

■

Emergency lighting  

■

LED  

■

CCFL drivers (back lighting)  

■

Voltage regulation  

■

Relay driver  

Figure 1.  

Internal schematic diagram  

Description  

The device is a

 

PNP 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.  

Table 1.  

Order code  

2STN2540  

Device summary  

Marking  

Package  

SO

T

–

223  

Packaging  

N2540  

T

a

pe and reel  

January 2008  

Rev 3  

1/9  

9

Electrical ratings  

2STN2540  

1

Electrical ratings  

Table 2.  

Symbol  

Absolute maximum rating  

Parameter  

Value  

Unit  

V

Collector-base voltage (I

 

= 0)  

-40  

-40  

V

V

CBO  

E

V

Collector-emitter voltage (I

 

= 0)  

CEO  

B

V

Emitter-base voltage (I

 

= 0)  

-6  

V

EBO  

C

I

Collector current  

-5  

A

C

I

Collector peak current (t

 

< 5ms)  

-10  

A

CM  

P

I

Base peak current (t

 

< 5ms)  

-2  

A

BM  

P

P

T

o

tal dissipation at T  

= 25 °C  

1.6  

W

°C  

°C  

tot  

amb  

T

Storage temperature  

-65 to 150  

150  

stg  

T

Max. operating junction temperature  

J

Table 3.  

Symbol  

Thermal data  

Parameter  

Value  

Unit  

(1)  

Thermal resistance junction-amb  

__

max  

78  

°C/W  

R

thj-amb  

1. Device

 

mounted on PCB area of 1cm

2  

2/9  

2STN2540  

Electrical characteristics  

2

Electrical characteristics  

(T  

= 25 °C unless otherwise specified)  

case  

Table 4.  

Symbol  

Electrical characteristics  

Parameter  

Test conditions  

Min.  

Typ. Max. Unit  

Collector cut-off current  

V

I

= -30 V  

CB  

-0.1  

-0.1  

µ

A  

µ

A  

CBO  

(I =0)  

E

Emitter cut-off current  

I

V

= -5 V  

EB  

EBO  

(I =0)  

C

I =

 

-0.5 A

 

I =

 

-5 mA  

-120  

-180  

-200  

-450  

mV  

mV  

mV  

mV  

-80  

C

B

(1)  

I =

 

-1 A  

I =

 

-10 mA  

-120  

-140  

-350  

V

V

C

B

Collector-emitter  

saturation voltage  

CE(sat)  

I =

 

-2 A  

I =

 

-200 mA  

C

B

I =

 

-5 A  

I =

 

-500 mA  

C

B

Base-emitter saturation  

voltage  

(1)  

(1)  

I =

 

-5 A  

I =

 

-500 mA  

-1.3  

V

V

C

B

BE(sat)  

V

= -2 V

 

I =

 

-2 A  

Base-emitter on voltage  

-1.25  

V

CE  

C

BE(on)  

I =

 

-0.5 A  

V

V

V

V

= -2 V  

= -2 V  

= -2 V  

= -2 V  

250  

200  

150  

50  

C

CE  

CE  

CE  

CE  

I =

 

-1 A  

C

(1)  

DC current gain  

h

FE  

I =

 

-2 A  

C

I =

 

-5 A  

C

I =

 

0  

V

= -10 V  

CB  

Collector-base  

capacitance  

E

C

80  

pF  

CBO  

f = 1 MHz  

I =

 

-1 A

_  

V

= -10 V  

CC  

C

Resistive load  

T

u

rn-on time  

Storage time  

Fall time  

t

-I =

 

I =

 

-0.1 A  

75  

426  

62  

ns  

ns  

ns  

on  

B1  

B2  

t

T

= 30 µs  

s

p

t

f

1. Pulsed

 

duration = 300 µs, duty cycle

≤

1.5%  

3/9  

Electrical characteristics  

2STN2540  

2.1  

Electrical characteristics (curves)  

Figure 2.  

Figure 4.  

Figure 6.  

Output characteristics  

Figure 3.  

DC current gain  

Collector-emitter saturation

 

Figure 5.  

voltage  

Base-emitter saturation  

voltage  

Base-emitter on voltage  

Figure 7.  

Resistive load switching  

times  

4/9  

2STN2540  

Electrical characteristics  

Figure 8.  

Resistive load switching  

times  

Figure 9.  

Capacitance  

2.2  

Test circuit  

Figure 10.

 

Resistive load switching test circuit  

1) Fast electronic switch  

2) Non-inductive resistor  

5/9  

Package mechanical data  

2STN2540  

3

Package mechanical data  

In order to meet environmental requirements, ST offers these devices in ECO

P

A

CK®  

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. ECO

P

ACK is an ST trademark.  

ECO

P

ACK specifications are available at:

6/9  

2STN2540  

Package mechanical data  

S

OT-22

3

mechanical data  

mm.  

typ  

DIM.  

min.  

max.  

1.

8

0  

0.1  

A

A1  

B

0.02  

0.60  

2.

9

0  

0.24  

6.

3

0  

0.70  

3

.00  

0.26  

6.50  

2.

3

0  

4.60  

3

.50  

7.00  

0.

8

5  

3

.15  

0.

3

5  

6.70  

B1  

c

D

e

e1  

E

3

.

3

0  

3

.70  

7.

3

0  

H

6.70  

o

V

10  

0046067_L  

7/9  

Revision history  

2STN2540  

4

Revision history  

Table 5.  

Date  

Document revision history  

Revision  

Changes  

23-Oct-2003  

03-Nov-2006  

14-Jan-2008  

1

2

3

Initial release  

Added new graphics: fig.2, fig. 7, fig.8, fig.9.  

Document status promoted from preliminary data to datasheet.  

8/9  

2STN2540  

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