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LM4040AIM3 View Datasheet(PDF) - Micrel

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LM4040AIM3 Datasheet PDF : 16 Pages
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LM4040/4041
Micrel
LM4040 and LM4041 Electrical Characteristic Notes
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 specification 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.
Note 3.
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 LM4040 and LM4041,
TJMAX = 125°C, and the typical thermal resistance (θJA), when board mounted, is 326°C/W for the SOT-23 package.
The human body model is a 100pF capacitor discharged through a 1.5kresistor into each pin. The machine model is a 200pF capacitor
discharged directly into each pin.
Note 4. Typicals are at TJ = 25°C and represent most likely parametric norm.
Note 5. Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation using Statistical Quality Control (SQL)
methods.
Note 6.
The boldface (over temperature limit for Reverse Breakdown Voltage Tolerance is defined as the room temperature Reverse Breakdown
Voltage Tolerance ±[(VR/T)(65°C)(VR)]. VR/T is the VR temperature coefficient, 65°C is the temperature range from 40°C to the
reference point of 25°C, and VR is the reverse breakdown voltage. The total over temperature tolerance for the different grades follows:
A-grade: ±0.75% = ±0.1% ±100ppm/°C × 65°C
B-grade: ±0.85% = ±0.2% ±100ppm/°C × 65°C
C-grade: ±1.15% = ±0.5% ±100ppm/°C × 65°C
D-grade: ±1.98% = ±1.0% ±150ppm/°C × 65°C
Example: The A-grade LM4040-2.5 has an over temperature Reverse Breakdown Voltage tolerance of ±2.5 × 0.75% = ±19mV.
Note 7. When VOUT 1.6V, the LM4041-ADJ must operate at reduced IR. This is caused by the series resistance of the die attach between the die ()
output and the package () output pin. See the Output Saturation curve in the Typical Performance Characteristics section.
Note 8. Reference voltage and temperature coefficient will change with output voltage. See Typical Performance Characteristics curves.
LM4041 Typical Characteristics
Temperature Drift for Different
Average Temperature Coefficient
+0.5
+0.4
+0.3
IR = 150µA
LM4041-1.2
+0.2
+0.1
12ppm/°C
0
-0.1
-0.2
-0.3
-22ppm/°C
-0.4
-51ppm/°C
-0.5
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
Reverse Characteristics and
Minimum Operating Current
100
80
60
40
Typical
20
TJ = 25°C
LM4041-1.2
0
0 0.4 0.8 1.2 1.6 2.0
REVERSE VOLTAGE (V)
Output Impedence
vs. Frequency
1k
TJ = 25° C
IR = 0.1IR
100
LM4041-1.2
CL= 0
10
IR= 150µA
1 IR = 1mA
CL= 1µF
TANTALUM
0.1
100
XC
1k 10k 100k 1M
FREQUENCY (Hz)
Reverse Characteristics and
Minimum Operating Current
100
80
60
40
Typical
20
TJ = 25°C
LM4041-1.2
0
0 0.4 0.8 1.2 1.6 2.0
REVERSE VOLTAGE (V)
1000
800
600
Voltage Impedance
IR = 200µA
TJ = 25°C
LM4041-1.2
LM4041-ADJ: VOUT = VREF
400
200
0
1 10 100 1k 10k 100k
FREQUENCY (Hz)
RS 30k
VIN
1Hz rate
LM4041-1.2
V
R
Test Circuit
LM4040/4041
10
January 2000
 

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