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MMBD4448
SURFACE MOUNT SWITCHING DIODE
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 3 and 4)
Mechanical Data
* * * * * * * * * SOT-23 Case: SOT-23 Case Material: Molded Plastic. UL Flammability Classification Rating 94V-0 Moisture Sensitivity: Level 1 per J-STD-020 Terminals: Solderable per MIL-STD-202, Method 208 Lead Free Plating (Matte Tin Finish annealed over Alloy 42 leadframe). Polarity: See Diagram Marking Information: See Page 2 Ordering Information: See Page 2 Weight: 0.008 grams (approximate)
TOP VIEW
TOP VIEW Internal Schematic
Maximum Ratings @TA = 25C unless otherwise specified
Characteristic Non-Repetitive Peak Reverse Voltage Peak Repetitive Reverse Voltage Working Peak Reverse Voltage DC Blocking Voltage RMS Reverse Voltage Forward Continuous Current (Note 1) Average Rectified Output Current (Note 1) Non-Repetitive Peak Forward Surge Current Symbol VRM VRRM VRWM VR VR(RMS) IFM IO @ t = 1.0s @ t = 1.0s IFSM Value 100 75 53 500 250 4.0 2.0 Unit V V V mA mA A
Thermal Characteristics
Characteristic Power Dissipation (Note 1) Thermal Resistance Junction to Ambient Air (Note 1) Operating and Storage Temperature Range Symbol PD RJA TJ , TSTG Value 350 357 -65 to +150 Unit mW C/W C
Electrical Characteristics
Characteristic Reverse Breakdown Voltage (Note 2) Forward Voltage
@TA = 25C unless otherwise specified Symbol V(BR)R VF Min 75 0.62 Max 0.72 0.855 1.0 1.25 2.5 50 30 25 4.0 4.0 Unit V V A A A nA pF ns Test Condition IR = 2.5A IF = 5.0mA IF = 10mA IF = 100mA IF = 150mA VR = 75V VR = 75V, TJ = 150C VR = 25V, TJ = 150C VR = 20V VR = 0, f = 1.0MHz IF = IR = 10mA, Irr = 0.1 x IR, RL = 100
Reverse Current (Note 2) Total Capacitance Reverse Recovery Time
Notes:
IR CT trr
1. Part mounted on FR-4 board with recommended pad layout, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf. 2. Short duration pulse test used to minimize self-heating effect. 3. No purposefully added lead. Halogen and Antimony Free. 4. 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.
MMBD4448
Document number: DS12011 Rev. 16 - 2
1 of 4 www.diodes.com
August 2010
(c) Diodes Incorporated
MMBD4448
500
1,000
400
Note 1
IF, INSTANTANEOUS FORWARD CURRENT (mA)
PD, POWER DISSIPATION (mW)
100
300
10
200
100
1
0 0 80 40 120 160 TA, AMBIENT TEMPERATURE (C) Fig. 1 Power Derating Curve 200
0.1
0
0.8 0.4 1.2 1.6 VF, INSTANTANEOUS FORWARD VOLTAGE (V) Fig. 2 Typical Forward Characteristics
IR, INSTANTANEOUS REVERSE CURRENT (nA)
10,000
3.0 2.5
f = 1MHz
1,000
CT, TOTAL CAPACITANCE (pF)
2.0
100
1.5
10
1.0
1
0.5
0.1 0 20 40 60 80 100 VR, INSTANTANEOUS REVERSE VOLTAGE (V) Fig. 3 Typical Reverse Characteristics
0 0 10 20 30 40 VR, DC REVERSE VOLTAGE (V) Fig. 4 Total Capacitance vs. Reverse Voltage
Ordering Information (Note 5)
Part Number MMBD4448-7-F
Notes:
Case SOT-23
Packaging 3000/Tape & Reel
5. For packaging details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf.
Marking Information
KA3 = Product Type Marking Code YM = Date Code Marking Y = Year (ex: N = 2002) M = Month (ex: 9 = September)
KA3
Date Code Key Year 1999 Code K Month Code Jan 1
2000 L
2001 M Feb 2
2002 N Mar 3
2003 P
2004 R
2005 S May 5
YM
2006 T Jun 6
2007 U
2008 V Jul 7
2009 W Aug 8
2010 X
2011 Y
2012 Z Oct O
2013 A Nov N
2014 B
2015 C Dec D
Apr 4
Sep 9
MMBD4448
Document number: DS12011 Rev. 16 - 2
2 of 4 www.diodes.com
August 2010
(c) Diodes Incorporated
MMBD4448
Package Outline Dimensions
A
BC
H K D J F G L M
K1
SOT-23 Dim Min Max Typ A 0.37 0.51 0.40 B 1.20 1.40 1.30 C 2.30 2.50 2.40 D 0.89 1.03 0.915 F 0.45 0.60 0.535 G 1.78 2.05 1.83 H 2.80 3.00 2.90 J 0.013 0.10 0.05 K 0.903 1.10 1.00 K1 0.400 L 0.45 0.61 0.55 M 0.085 0.18 0.11 0 8 All Dimensions in mm
Suggested Pad Layout
Y Z
C
Dimensions Value (in mm) Z 2.9 X 0.8 Y 0.9 C 2.0 E 1.35
X
E
MMBD4448
Document number: DS12011 Rev. 16 - 2
3 of 4 www.diodes.com
August 2010
(c) Diodes Incorporated
MMBD4448
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. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and 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 (c) 2010, Diodes Incorporated www.diodes.com
MMBD4448
Document number: DS12011 Rev. 16 - 2
4 of 4 www.diodes.com
August 2010
(c) Diodes Incorporated

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