MMBT3906LP

Document number: DS31836 Rev. 3 - 2

2 of 5

www.diodes.com

February 2011

© Diodes Incorporated

MMBT3906LP

Characteristic

Symbol

Value

Unit

Collector-Base Voltage

-40

V

Collector-Emitter Voltage

-40

V

Emitter-Base Voltage

-5.0

V

Collector Current - Continuous (Note 4)

-200

mA

Thermal Characteristics

Characteristic

Symbol

Value

Unit

Power Dissipation (Note 4)

250

mW

Thermal Resistance, Junction to Ambient (Note 4)

500

°C/W

Operating and Storage and Temperature Range

-55 to +150

°C

Notes:

4. Device mounted on FR-4 PCB, pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at

http://www.diodes.com

1E-06

0.00001

0.0001

0.001

0.01

0.1

1

10

100

1,000

10,000

Fig. 1 Transient Thermal Response

t , PULSE DURATION TIME (s)

1

0.001

0.01

0.1

1

T - T = P * R

(t)

Duty Cycle, D = t /t

JA

JA

12

θ

R

(t) = r(t) *

θJA

R

R

= 500°C/W

θ

θ

JA

JA

P(pk)

t

2

D = 0.7

D = 0.5

D = 0.3

D = 0.05

D = 0.02

D = 0.01

D = 0.005

D = Single Pulse

D = 0.9

D = 0.1

1E-06

0.0001

0.01

1

100

10,000

Fig. 2 Single Pulse Maximum Power Dissipation

t , PULSE DURATION TIME (s)

1

1

10

100

1,000

0.1

Single Pulse

T - T = P * R

(t)

JA

JA

θ

R

(t) = r(t) *

θJA

R

R

= 500°C/W

θ

θ

JA

JA

0

0.05

0

20

40

60

80

100

120

140

160

T , AMBIENT TEMPERATURE ( C)

A

°

Fig. 3 Power Dissipation vs. Ambient Temperature

0.10

0.15

0.20

0.25

0.30