LM4040-N, LM4040Q-N
SNOS633H –OCTOBER 2000–REVISED APRIL 2013
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2.5-V LM4040-N Electrical Characteristics
VR Tolerance Grades 'C', 'D', and 'E'; Temperature Grade 'E' (AEC Grade 1)
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. The grades C, D and E designate initial
Reverse Breakdown Voltage tolerances of ±0.5%, ±1.0% and ±2.0%, respectively.
LM4040CEM3
LM4040DEM3
LM4040EEM3
Typical(1
Symbol
Parameter
Conditions
LM4040QCEM3 LM4040QDEM3 LM4040QEEM3
Units
)
Limits(2)
Limits(2)
Limits(2)
Reverse Breakdown
Voltage
IR = 100 μA
2.500
45
V
VR
±12
±25
±50
mV (max)
mV (max)
μA
Reverse Breakdown
Voltage Tolerance(3)
IR = 100 μA
±38
±63
±88
Minimum Operating
Current
IRMIN
60
65
65
μA (max)
μA (max)
ppm/°C
ppm/°C (max)
ppm/°C
mV
68
73
73
Average Reverse
Breakdown Voltage
Temperature
IR = 10 mA
IR = 1 mA
±20
±15
±15
0.3
±100
±150
±150
ΔVR/ΔT
Coefficient(3)
IR = 100 μA
I
RMIN ≤ IR ≤ 1 mA
0.8
1.0
1.0
mV (max)
mV (max)
mV
Reverse Breakdown
Voltage Change with
Operating Current
Change(4)
1.0
1.2
1.2
ΔVR/ΔIR
2.5
0.3
1 mA ≤ IR ≤ 15 mA
6.0
8.0
8.0
mV (max)
mV (max)
Ω
8.0
10.0
10.0
Reverse Dynamic
Impedance
IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
ZR
eN
0.9
1.1
1.1
Ω (max)
IR = 100 μA
10 Hz ≤ f ≤ 10 kHz
Wideband Noise
35
μVrms
ppm
%
Reverse Breakdown t = 1000 hrs
ΔVR
Voltage Long Term
Stability
T = 25°C ±0.1°C
IR = 100 μA
120
0.08
Thermal
VHYST
ΔT= −40°C to +125°C
Hysteresis(5)
(1) Typicals are at TJ = 25°C and represent most likely parametric norm.
(2) Limits are 100% production tested at 25°C. Limits over temperature are ensured through correlation using Statistical Quality Control
(SQC) methods. The limits are used to calculate AOQL.
(3) The boldface (over-temperature) limit for Reverse Breakdown Voltage Tolerance is defined as the room temperature Reverse
Breakdown Voltage Tolerance ±[(ΔVR/ΔT)(maxΔT)(VR)]. Where, ΔVR/ΔT is the VR temperature coefficient, maxΔT is the maximum
difference in temperature from the reference point of 25°C 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 maxΔT = 65°C is shown below:
A-grade: ±0.75% = ±0.1% ±100 ppm/°C × 65°C
B-grade: ±0.85% = ±0.2% ±100 ppm/°C × 65°C
C-grade: ±1.15% = ±0.5% ±100 ppm/°C × 65°C
D-grade: ±1.98% = ±1.0% ±150 ppm/°C × 65°C
E-grade: ±2.98% = ±2.0% ±150 ppm/°C × 65°C
The total over-temperature tolerance for the different grades in the extended temperature range where max ΔT = 100 °C is shown
below:
C-grade: ±1.5% = ±0.5% ±100 ppm/°C × 100°C
D-grade: ±2.5% = ±1.0% ±150 ppm/°C × 100°C
E-grade: ±3.5% = ±2.0% ±150 ppm/°C × 100°C
Therefore, as an example, the A-grade 2.5-V LM4040-N has an over-temperature Reverse Breakdown Voltage tolerance of ±2.5V ×
0.75% = ±19 mV.
(4) 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.
(5) Thermal hysteresis is defined as the difference in voltage measured at +25°C after cycling to temperature -40°C and the 25°C
measurement after cycling to temperature +125°C.
10
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