MMBD4448HW
SURFACE MOUNT SWITCHING DIODE
Features
Mechanical Data
•
•
•
•
•
•
•
•
Fast Switching Speed
Surface Mount Package Ideally Suited for Automated Insertion
For General Purpose Switching Applications
High Conductance
Lead Free/RoHS Compliant (Note 1)
"Green" Device (Notes 2 and 3)
•
•
•
•
Case: SOT-323
Case Material: Molded Plastic, "Green" Molding Compound
(Note 3). 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: 0.006 grams (approximate)
SOT-323
Top View
Internal Schematic
Top View
Ordering Information (Notes 3 & 4)
Part Number
MMBD4448HW-7-F
Notes:
Case
SOT-323
Packaging
3000/Tape & Reel
1. No purposefully added lead.
2. Diodes Inc.'s "Green" policy can be found on our website at http://www.diodes.com.
3. Product manufactured with Date Code 0627 (week 27, 2006) and newer are built with Green Molding Compound. Product manufactured prior to Date
Code 0627 are built with Non-Green Molding Compound and may contain Halogens or Sb2O3 Fire Retardants.
4. For packaging details, go to our website at http://www.diodes.com.
Date Code Key
Year
2000
Code
L
2001
M
2002
N
2003
P
2004
R
KA1
YM
Marking Information
2005
S
2006
T
KA1= Product Type Marking Code
YM = Date Code Marking
Y = Year (ex: N = 2002)
M = Month (ex: 9 = September)
2007
U
2008
V
2009
W
2010
X
2011
Y
2012
Z
2013
A
2014
B
2015
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
MMBD4448HW
Document number: DS30228 Rev. 8 - 2
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February 2011
© Diodes Incorporated
MMBD4448HW
Maximum Ratings @TA = 25°C unless otherwise specified
Characteristic
Non-Repetitive Peak Reverse Voltage
Symbol
VRM
VRRM
VRWM
VR
VR(RMS)
IFM
IO
Peak Repetitive Reverse Voltage
Working Peak Reverse Voltage
DC Blocking Voltage
RMS Reverse Voltage
Forward Continuous Current (Note 5)
Average Rectified Output Current (Note 5)
Non-Repetitive Peak Forward Surge Current
Value
100
Unit
V
80
V
V
mA
mA
IFSM
57
500
250
4.0
1.0
Symbol
PD
RθJA
TJ, TSTG
Value
200
625
-65 to +150
Unit
mW
°C/W
°C
@ t = 1.0μs
@ t = 1.0s
A
Thermal Characteristics
Characteristic
Power Dissipation (Note 5)
Thermal Resistance Junction to Ambient Air (Note 5)
Operating and Storage Temperature Range
Electrical Characteristics @TA = 25°C unless otherwise specified
Characteristic
Reverse Breakdown Voltage (Note 6)
Symbol
V(BR)R
Min
80
0.62
⎯
⎯
⎯
Max
⎯
Unit
V
0.72
0.855
1.0
1.25
V
Forward Voltage
VF
Peak Reverse Current (Note 6)
IR
⎯
100
50
30
25
nA
μA
μA
nA
Total Capacitance
Reverse Recovery Time
CT
trr
⎯
⎯
3.5
4.0
pF
ns
Notes:
5. Device mounted on FR-4 PCB, 1 inch x 0.85 inch x 0.062 inch; pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which
can be found on our website at http://www.diodes.com.
6. Short duration pulse test used to minimize self-heating effect.
IF, INSTANTANEOUS FORWARD CURRENT (mA)
250
PD, POWER DISSIPATION (mW)
Test Condition
IR = 2.5μA
IF = 5.0mA
IF = 10mA
IF = 100mA
IF = 150mA
VR = 70V
VR = 75V, TJ = 150°C
VR = 25V, TJ = 150°C
VR = 20V
VR = 6V, f = 1.0MHz
VR = 6V, IF = 5mA
200
150
100
50
0
0
160
80
120
40
TA, AMBIENT TEMPERATURE (° C)
Fig. 1 Power Derating Curve (Note 5)
MMBD4448HW
Document number: DS30228 Rev. 8 - 2
1,000
200
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100
10
1
0.1
0
0.4
0.8
1.2
1.6
VF, INSTANTANEOUS FORWARD VOLTAGE (V)
Fig. 2 Typical Forward Characteristics
February 2011
© Diodes Incorporated
MMBD4448HW
3.0
f = 1MHz
CT, TOTAL CAPACITANCE (pF)
IR, INSTANTANEOUS REVERSE CURRENT (nA)
10,000
1,000
100
10
1
2.5
2.0
1.5
1.0
0.5
0
0.1
20
0
40
60
80
100
VR, INSTANTANEOUS REVERSE VOLTAGE (V)
Fig. 3 Typical Reverse Characteristics
0
10
20
30
40
VR, DC REVERSE VOLTAGE (V)
Fig. 4 Total Capacitance vs. Reverse Voltage
Package Outline Dimensions
A
SOT-323
Dim
Min
Max
Typ
A
0.25
0.40
0.30
B
1.15
1.35
1.30
C
2.00
2.20
2.10
D
0.65
G
1.20
1.40
1.30
H
1.80
2.20
2.15
J
0.0
0.10
0.05
K
0.90
1.00
1.00
L
0.25
0.40
0.30
M
0.10
0.18
0.11
0°
8°
α
All Dimensions in mm
B C
G
H
K
M
J
L
D
Suggested Pad Layout
Y
Z
C
X
MMBD4448HW
Document number: DS30228 Rev. 8 - 2
Dimensions Value (in mm)
Z
2.8
X
0.7
Y
0.9
C
1.9
E
1.0
E
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February 2011
© Diodes Incorporated
MMBD4448HW
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume
all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated
website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel.
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hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or
indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings
noted herein may also be covered by one or more United States, international or foreign trademarks.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related
information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its
representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2011, Diodes Incorporated
www.diodes.com
MMBD4448HW
Document number: DS30228 Rev. 8 - 2
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February 2011
© Diodes Incorporated
