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LL4148 Small Signal Diode
December 2005
LL4148
Small Signal Diode
COLOR BAND MARKING 1ST BAND Black 2ND BAND Green
SOD80
Absolute Maximum Ratings * T
Symbol
VRRM IF(AV) IFSM
a
= 25C unless otherwise noted
Parameter
Maximum Repetitive Reverse Voltage Average Rectified Forward Current Non-repetitive Peak Forward Surge Current Pulse Width = 1.0 second Pulse Width = 1.0 microsecond Storage Temperature Range Operating Junction Temperature
Value
100 200 1.0 2.0 -65 to +200 175
Unit
V mA A A C C
TSTG TJ
Notes:
* These ratings are limiting values above which the serviceability of the diode may be impaired. 1) These ratings are based on a maximum junction temperature of 200degrees C. 2) These are steady state limits. The factory should be consulted on applications involving pulsed or low duty cycle operations.
Thermal Characteristics
Symbol
PD RJA Power Dissipation Thermal Resistance, Junction to Ambient
Parameter
Value
500 300
Unit
mW C/W
Note: Jedec Standard 51-3 method( PCB Board size 76*114*0.6Tmm3 )
Electrical Characteristics
Symbol
VR VF IR CT trr Breakdown Voltage Forward Voltage Reverse Leakage Total Capacitance Reverse Recovery Time
TC = 25C unless otherwise noted
Parameter
IR = 100A IR = 5.0A IF = 10mA
Conditions
Min.
100 75
Max.
Units
V V
1.0 25 50 4.0 4.0
V nA A pF ns
VR = 20V VR = 20V, TA = 150C VR = 0, f = 1.0MHz IF = 10mA, VR = 6.0V (60mA), Irr = 1.0mA, RL = 100
Package Marking and Ordering Information
Device Marking
Color Band Marking
Device
LL4148
Package
SOD80
Reel Size
7"
Tape Width
8mm
Quantity
2,500
(c)2005 Fairchild Semiconductor Corporation
1
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LL4148 Rev. A
LL4148 Small Signal Diode
Typical Performance Characteristics
Figure 1. Reverse Voltage vs Reverse Current BV - 1.0 to 100A
160
Figure 2. Reverse Voltage vs Reverse Current IR - 10 to 100V
120
Ta=25 C
o
Ta= 25 C
[nA]
100
o
R
[V]
150
R
Reverse Voltage, V
80
Reverse Current, I
1 2 3 5 10 20 30 50 100
140
60
130
40
120
20
110
0
10
Reverse Current, IR [uA]
Reverse Voltage, VR [V]
20
30
50
70
100
Figure 3. Forward Voltage vs Forward Current VF - 1 to 100A
550
Figure 4. Forward Voltage vs Forward Current VF - 0.1 to 10mA
750
Ta= 25 C
o
Ta= 25 C
o
[mV]
R
450
Forward Voltage, V
Forward Voltage, V
400
350
300
250
F
[mV]
500
700
650
600
550
500
450
1
2
3
5
10
20
30
50
100
0.1
0.2
0.3
0.5
1
2
3
5
10
Forward Current, IF [uA]
Forward Current, IF [mA]
Figure 5. Forward Voltage vs Forward Current VF - 10 to 800mA
1.6
Figure 6. Forward Voltage vs Ambient Temperature VF - 0.01 - 20mA (-40 to +65 Deg C)
900
Ta= 25 C
o
[mV]
800
Typical Ta= -40 C
o
Forward Voltage, V F [mV]
1.4
1.2
Forward Voltage, V
F
700
600
Ta= 25 C
o
1.0
500
Ta= +65 C
o
400
0.8
300
0.6
10
20
30
50
100
200
300
500
800
0.01
0.03
0.1
0.3
1
3
10
Forward Current, IF [mA]
Forward Current, IF [mA]
2 LL4148 Rev. A
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LL4148 Small Signal Diode
Typical Performance Characteristics
Figure 7. Total Capacitance Figure 8. Reverse Recovery Time vs Reverse Recovery Current
4.0
0.90
[ns]
TA = 25 C
o
Ta = 25 C
3.5
o
Total Capacitance (pF)
Reverse Recovery Time, t
0.85
0.80
0.75 0 2 4 6 8 10 12 14
rr
3.0
2.5
2.0
1.5
1.0 10 20 30 40 50 60
REVERSE VOLTAGE (V)
Reverse Recovery Current, Irr [mA]
Figure 9. Average Rectified Current (IF(AV)) versus Ambient Temperature (TA)
500
Figure 10. Power Derating Curve
500
400
Power Dissipation, PD [mW]
400
DO-35 , SOD80
Current (mA)
300
300
200
IF(A V) AV E
SOT-23
RAG
E RE
200
CTIFIE
D CU
R R EN
100
T-m
A
100
0 0 50 100
o
0 150 0 50 100 150
o
200
Ambient Temperature ( C)
Temperature [ C]
3 LL4148 Rev. A
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LL4148 Small Signal Diode
Mechanical Dimensions
SOD80
3.60 3.30
0.50 0.35
1.50 1.30
NOTE/s: 1) THIS PACKAGE CONFORMS TO JEDEC DO-213D, VARIATION AC, DATED 9/1988. 2) ALL DIMENSIONS ARE IN MILLIMETERS.
4 LL4148 Rev. A
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FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component is any component of a life 1. Life support devices or systems are devices or support device or system whose failure to perform can systems which, (a) are intended for surgical implant into be reasonably expected to cause the failure of the life the body, or (b) support or sustain life, or (c) whose support device or system, or to affect its safety or failure to perform when properly used in accordance with instructions for use provided in the labeling, can be effectiveness. reasonably expected to result in significant injury to the user. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Advance Information Product Status Formative or In Design Definition This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. This datasheet contains preliminary data, and supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design.
Preliminary
First Production
No Identification Needed
Full Production
Obsolete
Not In Production
This datasheet contains specifications on a product that has been discontinued by Fairchild semiconductor. The datasheet is printed for reference information only.
Rev. I17

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