STMicroelectronics-STT818B

STT818B  

High gain low voltage PNP power transistor  

Features  

■

Very low collector to emitter saturation voltage  

■

DC current gain > 100 (h  

)

FE  

■

3 A continuous collector current (I

 

)  

C

Applications  

■

Power management in portable equipments  

SOT23-6L  

■

Switching regulator in battery charger  

applications  

Description  

The device is manufactured in low voltage PNP  

Planar

T

e

chnology with “Base Island” layout. The  

resulting

T

r

ansistor shows exceptional high gain  

performance coupled with very low saturation  

voltage.  

Figure 1.  

Internal schematic diagram  

Table 1.  

Order code  

STT818B  

Device summary  

Marking  

Package  

SOT23-6L  

Packaging  

818B  

T

a

pe & reel  

August 2007  

Rev 5  

1/10  

10  

Contents  

STT818B  

Contents  

2/10  

STT818B  

Electrical ratings  

1

Electrical ratings  

Table 2.  

Symbol  

Absolute maximum rating  

Parameter  

Value  

Unit  

V

V

CBO  

V

CEO  

V

EBO  

I

C  

Collector-base voltage (I

E

= 0)  

-30  

-30  

-5  

Collector-emitter voltage (I

B

= 0)  

Emitter-base voltage (I

C

= 0)  

Collector current  

V

V

-3  

-6  

A

I

CM  

I

B  

Collector peak current (t

P

< 5ms)  

Base current  

A

-0.2  

A

I

BM  

P

tot  

T

stg  

T

J  

Base peak current (t

P

< 5ms)  

T

o

tal dissipation at

T

amb

= 25°C  

Storage temperature  

-0.5  

A

1.2  

W

°C  

°C  

-65 to 150  

150  

Max. operating junction temperature  

Table 3.  

Symbol  

Thermal data  

Parameter  

Value  

Unit  

R

thj-amb  

Thermal resistance junction-ambient  

max  

104.2  

°C/W  

(1)  

1. Package

 

mounted on FR4 pcb 25mm x 25mm.  

3/10  

Electrical characteristics  

STT818B  

2

Electrical characteristics  

(T  

= 25°C unless otherwise specified)  

case  

Table 4.  

Symbol  

Electrical characteristics  

Parameter  

Test conditions  

Min.  

Typ. Max. Unit  

V

CB

= -30 V  

Collector cut-off current  

(I

E

=0)  

-0.1  

-20  

µ

A  

µ

A  

I

CBO  

V

CB

= -30 V

 

T

C

= 125°C  

Collector-cut-off current  

(I

C

= 0)  

I

EBO  

V

EB

= -5 V  

-0.1  

µ

A  

Collector-emitter  

breakdown voltage  

(1)  

I

C

= -10 mA  

-30  

V

V

(BR)CEO  

(I

B

= 0)  

I

C

= -0.5 A

 

_

I

B

= -5 mA  

-0.075 -0.15  

-0.3  

V

V

V

Collector-emitter  

saturation voltage  

(1)  

I

C

= -1.2 A  

I

B

= -12 mA  

V

CE(sat)  

-0.21  

-0.5  

I

C

= -2 A

 

_

I

B

= -20 mA  

I

C

= -0.5 A

 

_

I

B

= -5 mA  

I

C

= -1.2A

 

_

I

B

= -12 mA  

-0.74  

-1.1  

-1.1  

-1.2  

V

V

V

Base-emitter saturation  

voltage  

(1)  

V

BE(sat)  

I

C

= -2A  

_

I

B

= -20 mA  

I

C

= -0.5 A  

I

C

= -2.5 A  

V

CE

= -1 V  

V

CE

= -3 V  

100  

100  

(1)  

DC current gain  

h

FE  

(1)  

I

C

= -0.5 A  

V

CE

= -2 V  

Base-emitter voltage  

-0.71  

-1.1  

V

V

BE(ON)  

1. Pulse

 

duration = 300

µ

s, duty cycle 1.5 %.  

4/10  

STT818B  

Electrical characteristics  

2.1  

Electrical characteristics (curves)  

Figure 2.  

Figure 4.  

Figure 6.  

Safe operating area  

Figure 3.  

Derating curve  

DC Current Gain  

Figure 5.  

DC Current Gain  

Collector-emitter saturation

 

Figure 7.  

voltage  

Base-emitter saturation  

voltage  

5/10  

Electrical characteristics  

Figure 8.  

STT818B  

Switching times resistive  

load  

Figure 9.  

Switching times resistive  

load  

6/10  

STT818B  

Package mechanical data  

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:

7/10  

Package mechanical data  

STT818B  

SOT23-6L MECHANICAL DATA  

mm  

mils  

DIM.  

MIN.  

0.90  

0.00  

0.90  

0.25  

0.09  

2.80  

2.60  

1.50  

0.35  

TYP.  

MAX.  

1.45  

0.15  

1.30  

0.50  

0.20  

3.10  

3.00  

1.75  

0.55  

MIN.  

0.035  

0.000  

0.035  

0.010  

0.004  

0.110  

0.102  

0.059  

0.014  

TYP.  

MAX.  

0.057  

0.006  

0.051  

0.020  

0.008  

0.122  

0.118  

0.069  

0.022  

A

A1  

A2  

b

C

D

E

E1  

L

e

0.95  

1.90  

0.037  

0.075  

e1  

A A2  

L

e

b

c

A1  

E

e1  

D

E1  

8/10  

STT818B  

Revision history  

4

Revision history  

Table 5.  

Date  

Document revision history  

Revision  

Changes  

12-Jul-2002  

08-Aug-2007  

4

5

No content change; the document has been reformatted  

Updated

9/10  

STT818B  

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