Datasheet
LM4040-N, LM4040Q-N
SNOS633H –OCTOBER 2000–REVISED APRIL 2013
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2.5-V LM4040-N Electrical Characteristics
V
R
Tolerance Grades 'C', 'D', and 'E'; Temperature Grade 'E' (AEC Grade 1)
Boldface limits apply for T
A
= T
J
= T
MIN
to T
MAX
; all other limits T
A
= T
J
= 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
I
R
= 100 μA 2.500 V
Voltage
V
R
±12 ±25 ±50 mV (max)
Reverse Breakdown
I
R
= 100 μA
Voltage Tolerance
(3)
±38 ±63 ±88 mV (max)
45 μA
Minimum Operating
I
RMIN
60 65 65 μA (max)
Current
68 73 73 μA (max)
Average Reverse I
R
= 10 mA ±20 ppm/°C
Breakdown Voltage
I
R
= 1 mA ±15 ±100 ±150 ±150 ppm/°C (max)
ΔV
R
/ΔT
Temperature
I
R
= 100 μA ±15 ppm/°C
Coefficient
(3)
0.3 mV
I
RMIN
≤ I
R
≤ 1 mA 0.8 1.0 1.0 mV (max)
Reverse Breakdown
1.0 1.2 1.2 mV (max)
Voltage Change with
ΔV
R
/ΔI
R
Operating Current
2.5 mV
Change
(4)
1 mA ≤ I
R
≤ 15 mA 6.0 8.0 8.0 mV (max)
8.0 10.0 10.0 mV (max)
0.3 Ω
Reverse Dynamic I
R
= 1 mA, f = 120 Hz,
Z
R
Impedance I
AC
= 0.1 I
R
0.9 1.1 1.1 Ω (max)
I
R
= 100 μA
e
N
Wideband Noise 35 μV
rms
10 Hz ≤ f ≤ 10 kHz
Reverse Breakdown t = 1000 hrs
ΔV
R
Voltage Long Term T = 25°C ±0.1°C 120 ppm
Stability I
R
= 100 μA
Thermal
V
HYST
ΔT= −40°C to +125°C 0.08 %
Hysteresis
(5)
(1) Typicals are at T
J
= 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 ±[(ΔV
R
/ΔT)(maxΔT)(V
R
)]. Where, ΔV
R
/ΔT is the V
R
temperature coefficient, maxΔT is the maximum
difference in temperature from the reference point of 25°C to T
MIN
or T
MAX
, and V
R
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.
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