Diodes MMBD4448 User Manual

Features

• Fast Switching Speed

• Surface Mount Package Ideally Suited for Automated Insertion

• For General Purpose Switching Applications

• High Conductance

• Lead, Halogen and Antimony Free, RoHS Compliant

• "Green' Device (Notes 1 and 2)

Top View

MMBD4448

SURFACE MOUNT SWITCHING DIODE

Mechanical Data

• Case: SOT-23

• Case Material: Molded Plastic. UL Flammability Classification

Rating 94V-0

• Moisture Sensitivity: Level 1 per J-STD-020

• Terminals: Matte Tin Finish annealed over Alloy 42 leadframe

(Lead Free Plating). Solderable per MIL-STD-202, Method 208

• Polarity: See Diagram

• Weight: 0.008 grams (approximate)

SOT-23

Top View

Internal Schematic

Ordering Information (Note 3)

Part Number Case Packaging

MMBD4448-7-F SOT-23 3000/Tape & Reel

Notes: 1. No purposefully added lead. Halogen and Antimony Free.

2. Product manufactured with Date Code V9(week 34, 2008) and newer are built with Green Molding Compound. Product manufactured prior to Date Code
V9 are built with Non-Green Molding Compound and may contain Halogens or Sb2O3 Fire Retardants.

3. For packaging details, go to our website at http://www.diodes.com.

Marking Information

Date Code Key

Year 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015

Code K L M N P R S T U V W X Y Z A B C

Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Code 1 2 3 4 5 6 7 8 9 O N D

MMBD4448

Document number: DS12011 Rev. 17 - 2

KA3

www.diodes.com

KA3 = Product Type Marking Code
YM = Date Code Marking

YM

Y = Year (ex: N = 2002)
M = Month (ex: 9 = September)

1 of 4

February 2011

© Diodes Incorporated

)

θ

(BR)

P, P

O

R

PAT

O

N

TAN

TANEO

U

F

O

R

RD C

U

R

R

N

T

Maximum Ratings @T

= 25°C unless otherwise specified

A

Characteristic Symbol Value Unit

Non-Repetitive Peak Reverse Voltage
Peak Repetitive Reverse Voltage

Working Peak Reverse Voltage
DC Blocking Voltage

RMS Reverse Voltage
Forward Continuous Current (Note 4)
Average Rectified Output Current (Note 4)
Non-Repetitive Peak Forward Surge Current @ t = 1.0μs

@ t = 1.0s

Thermal Characteristics

Characteristic Symbol Value Unit

Power Dissipation (Note 4)
Thermal Resistance Junction to Ambient Air (Note 4)
Operating and Storage Temperature Range

V

T

V

RM

V

RRM

V

RWM

V

R(RMS

I

FM

I

I

FSM

P

R

, T

J

O

R

D
JA

STG

MMBD4448

100 V

75 V

53 V
500 mA
250 mA

4.0

1.0

A

350 mW
357

-65 to +150

°C/W

°C

Electrical Characteristics @T

= 25°C unless otherwise specified

A

Characteristic Symbol Min Max Unit Test Condition

Reverse Breakdown Voltage (Note 5)

Forward Voltage

Reverse Current (Note 5)

Total Capacitance
Reverse Recovery Time

Notes: 4. Part mounted on FR-4 board with recommended pad layout, which can be found on our website at http://www.diodes.com.

5. Short duration pulse test used to minimize self-heating effect.

V

R

V

F

I

⎯

R

C

⎯

T

t

⎯

rr

75

0.62

⎯
⎯
⎯

⎯

0.72

0.855

1.0

1.25

2.5
50
30
25

V

V

μA
μA
μA

nA

4.0 pF

4.0 ns

500

1,000

(mA)

400

N (mW)

Note 4

E

100

I

300

WA

DISSI
WE

200

10

S

IR = 2.5μA

= 5.0mA

I

F

= 10mA

I

F

I

= 100mA

F

= 150mA

I

F

V

= 75V

R

V

= 75V, TJ = 150°C

R

= 25V, TJ = 150°C

V

R

V

= 20V

R

VR = 0, f = 1.0MHz

= IR = 10mA,

I

F

= 0.1 x IR, RL = 100Ω

I

rr

D

100

1

S

0

0

40

T , AMBIENT TEMPERATURE (°C)

A

80

120

160

Fig. 1 Power Derating Curve

200

F

I, I

0.1
0

V , INSTANT ANEO US FORWARD VOLTAGE (V)

F

0.8

1.61.20.4

Fig. 2 Typical Forward C haracteristics

MMBD4448

Document number: DS12011 Rev. 17 - 2

2 of 4

www.diodes.com

February 2011

© Diodes Incorporated