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LM4050-10.0
Electrical Characteristics
Boldface limits apply for T
A =TJ =TMIN to TMAX; all other limits TA =TJ = 25C. The grades A, B and C designate initial
Reverse Breakdown Voltage tolerances of ±0.1% and ±0.2% and 0.5% respectively.
Symbol
Parameter
Conditions
Typical
LM4050AIM3
LM4050AEM3
Limits
LM4050BIM3
LM4050BEM3
Limits
LM4050CIM3
LM4050CEM3
Limits
Units
(Limit)
VR
Reverse Breakdown Voltage
IR = 150 A
10.00
V
Reverse Breakdown Voltage
Tolerance (Note 6)
IR = 150 A
±10
±20
±50
mV (max)
Industrial Temp. Range
±43
±53
±83
mV (max)
Extended Temp. Range
±60
±70
±100
mV (max)
IRMIN
Minimum Operating Current
80
A
100
A (max)
Industrial Temp. Range
103
A (max)
Extended Temp. Range
110
A (max)
VR/T
Average Reverse Breakdown
Voltage Temperature Coefficient
IR =10 mA
±40
ppm/C
IR =1 mA
±20
ppm/C
IR = 150 A
±20
±50
ppm/C (max)
VR/IR
Reverse Breakdown Voltage
Change with Operating Current
Change (Note 7)
IRMIN ≤ IR ≤ 1 mA
0.8
mV
1.5
mV (max)
3.5
mV (max)
1mA
≤ IR ≤ 15 mA
8.0
mV
12.0
mV (max)
23.0
mV (max)
ZR
Reverse Dynamic Impedance
IR = 1 mA, f = 120 Hz,
0.7
IAC = 0.1 IR
eN
Wideband Noise
IR = 150 A
150
Vrms
10 Hz
≤ f ≤ 10 kHz
VR
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25C ±0.1C
120
ppm
IR = 150 A
VHYST
Thermal Hysteresis
T = 40C to 125C
2.8
mV
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed
specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test
conditions.
Note 2: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJmax (maximum junction temperature), θJA (junction to
ambient thermal resistance), and TA (ambient temperature). The maximum allowable power dissipation at any temperature is PDmax =(TJmax TA)/θJA or the
number given in the Absolute Maximum Ratings, whichever is lower. For the LM4050, TJmax = 125C, and the typical thermal resistance (θJA), when board mounted,
is 326C/W for the SOT-23 package.
Note 3: The human body model is a 100 pF capacitor discharged through a 1.5 k
resistor into each pin. The machine model is a 200 pF capacitor discharged
directly into each pin.
Note 4: Typicals are at TJ = 25C and represent most likely parametric norm.
Note 5: Limits are 100% production tested at 25C. Limits over temperature are guaranteed through correlation using Statistical Quality Control (SQC) methods.
The limits are used to calculate National’s AOQL.
Note 6: The boldface (over-temperature) limit for Reverse Breakdown Voltage Tolerance is defined as the room temperature Reverse Breakdown Voltage Tolerance
±[(
V R/T)(maxT)(VR)]. Where, VR/T is the VR temperature coefficient, maxT is the maximum difference in temperature from the reference point of 25C to
T MIN or TMAX, and VR is the reverse breakdown voltage. The total over-temperature tolerance for the different grades in the industrial temperature range where
max
T = 65C is shown below:
A-grade: ±0.425% = ±0.1% ±50 ppm/C x 65C
B-grade: ±0.525% = ±0.2% ±50 ppm/C x 65C
C-grade: ±0.825% = ±0.5% ±50 ppm/C x 65C
Therefore, as an example, the A-grade LM4050-2.5 has an over-temperature Reverse Breakdown Voltage tolerance of ±2.5V x 0.425% = ±11 mV.
Note 7: Load regulation is measured on pulse basis from no load to the specified load current. Output changes due to die temperature change must be taken into
account separately.
Note 8: Thermal hysteresis is defined as the difference in voltage measured at +25C after cycling to temperature -40C and the 25C measurement after cycling
to temperature +125C.
LM4050
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