SLOS456O January   2005  – June 2024

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  LM4040A20I, LM4040B20I Electrical Characteristics
    6. 6.6  LM4040C20I, LM4040D20I Electrical Characteristics
    7. 6.7  LM4040C20Q, LM4040D20Q Electrical Characteristics
    8. 6.8  LM4040A25I, LM4040B25I Electrical Characteristics
    9. 6.9  LM4040C25I, LM4040D25I Electrical Characteristics
    10. 6.10 LM4040C25Q, LM4040D25Q Electrical Characteristics
    11. 6.11 LM4040A30I, LM4040B30I Electrical Characteristics
    12. 6.12 LM4040C30I, LM4040D30I Electrical Characteristics
    13. 6.13 LM4040C30Q, LM4040D30Q Electrical Characteristics
    14. 6.14 LM4040A41I, LM4040B41I Electrical Characteristics
    15. 6.15 LM4040C41I, LM4040D41I Electrical Characteristics
    16. 6.16 LM4040A50I, LM4040B50I Electrical Characteristics
    17. 6.17 LM4040C50I, LM4040D50I Electrical Characteristics
    18. 6.18 LM4040C50Q, LM4040D50Q Electrical Characteristics
    19. 6.19 LM4040A82I, LM4040B82I Electrical Characteristics
    20. 6.20 LM4040C82I, LM4040D82I Electrical Characteristics
    21. 6.21 LM4040A10I, LM4040B10I Electrical Characteristics
    22. 6.22 LM4040C10I, LM4040D10I Electrical Characteristics
    23. 6.23 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shunt Reference
  9. 8 Applications and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 LM4040 Voltage and Accuracy Choice
        2. 8.2.2.2 Cathode and Load Currents
        3. 8.2.2.3 Output Capacitor
        4. 8.2.2.4 SOT-23 Connections
        5. 8.2.2.5 Start-Up Characteristics
      3. 8.2.3 Application Curve
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Related Links
    2. 9.2 Trademarks
    3. 9.3 Electrostatic Discharge Caution
    4. 9.4 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6.7 LM4040C20Q, LM4040D20Q Electrical Characteristics

at extended temperature range, full-range TA = –40°C to 125°C (unless otherwise noted)
PARAMETERTEST CONDITIONSTALM4040C20QLM4040D20QUNIT
MINTYPMAXMINTYPMAX
VZReverse breakdown voltageIZ = 100μA25°C2.0482.048V
ΔVZReverse breakdown voltage
tolerance		IZ = 100μA25°C–1010–2020mV
Full range–3030–5050
IZ,minMinimum cathode current25°C45754575μA
Full range8080
αVZAverage temperature coefficient of reverse breakdown voltage (2)IZ = 10mA25°C±20±20ppm/°C
IZ = 1mA25°C±15±15
Full range±100±150
IZ = 100μA25°C±15±15
LM4040A LM4040B LM4040C LM4040D Reverse breakdown voltage change with cathode current changeIZ,min < IZ < 1mA25°C0.30.80.31mV
Full range11.2
1mA < IZ < 15mA25°C2.562.58
Full range810
ZZReverse dynamic impedanceIZ = 1mA, f = 120Hz,
IAC = 0.1 IZ		25°C0.30.90.31.1Ω
eNWideband noiseIZ = 100μA,
10Hz ≤ f ≤ 10kHz		25°C3535μVRMS
Long-term stability of reverse breakdown voltaget = 1000 h,
TA = 25°C ± 0.1°C,
IZ = 100μA		120120ppm
VHYSTThermal hysteresis(1)ΔTA = –40°C to 125°C0.08%0.08%—
(1) 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.
(2) The overtemperature 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 overtemperature tolerance for the different grades in the industrial temperature range where maxΔT = 65°C is shown below:
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
The total overtemperature tolerance for the different grades in the extended temperature range where max ΔT = 100 °C is shown below:
C-grade: ±1.5% = ±0.5% ±100ppm/°C × 100°C
D-grade: ±2.5% = ±1.0% ±150ppm/°C × 100°C
Therefore, as an example, the A-grade 2.5V LM4040 has an overtemperature Reverse Breakdown Voltage tolerance of ±2.5V × 0.75% = ±19mV.