SNOS491E February   2000  – March 2025 LM4051-N

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
    1.     Pin Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 LM4051-1.2 Electrical Characteristics
    6. 5.6 LM4051-ADJ Electrical Characteristics
    7. 5.7 Typical Characteristics
  7. 6 Parameter Measurement Information
  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 LM4051-N-1.2 V
      2. 7.4.2 LM4051-N - ADJ
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Shunt Regulator
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Adjustable Shunt Regulator
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
    3. 8.3 System Examples
    4. 8.4 Power Supply Recommendations
    5. 8.5 Layout
      1. 8.5.1 Layout Guidelines
      2. 8.5.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Receiving Notification of Documentation Updates
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

5.5 LM4051-1.2 Electrical Characteristics

over operating free-air temperature range (unless otherwise noted)
PARAMETERTEST CONDITIONSMINTYPMAXUNIT
VRReverse Breakdown VoltageIR = 100μA1.225V
Reverse Breakdown Voltage Tolerance(2)IR = 100μALM4051AIM3(1)±1.2mV
LM4051BIM3 LM4051BEM3(1)±2.4
LM4051CIM3(1)±6
Industrial Temp. Range
TA = TJ = TMIN to TMAX		LM4051AIM3(1)±5.2(2)
LM4051BIM3 (1)±6.4(2)
LM4051CIM3(1)±10.1(2)
Extended Temp. Range
TA = TJ = TMIN to TMAX		LM4051BEM3(1)±8.6(2)
IRMINMinimum Operating CurrentTJ = 25°C39µA
Industrial Temp. Range
TA = TJ = TMIN to TMAX		65
Extended Temp. Range
TA = TJ = TMIN to TMAX		70
∆VR/∆TAverage Reverse Breakdown Voltage Temperature Coefficient(2)IR =10mA±20ppm/ ̊C
IR =1mA±15
IR = 100μA
∆T = −40 ̊C to 125 ̊C		TJ = 25°C±15
TA = TJ = TMIN to TMAX±50(2)
∆VR/∆IRReverse Breakdown Voltage Change with Operating Current ChangeIRMIN ≤ IR ≤ 1mATJ = 25°C0.3mV
Industrial Temp. Range
TA = TJ = TMIN to TMAX		1.1(2)
Extended Temp. Range
TA = TJ = TMIN to TMAX		1.5(2)
1mA ≤ IR ≤ 12mATJ = 25°C1.8
Industrial Temp. Range
TA = TJ = TMIN to TMAX		6(2)
Extended Temp. Range
TA = TJ = TMIN to TMAX		8(2)
ZRReverse Dynamic ImpedanceIR = 1mA, f = 120Hz0.5Ω
eNWide band NoiseIR = 100μA
10Hz ≤ f ≤ 10kHz		20μVrms
∆VRReverse Breakdown Voltage Long Term Stability(3)t = 1000 hrs, T = 25 ̊C ± 0.1 ̊C, IR = 100μA120ppm
VHYSTThermal Hysteresis(4)∆T = −40 ̊C to 125 ̊C0.36mV/V
(1) Limits are 100% production tested at 25 ̊C. Limits over temperature are made sure through correlation using Statistical Quality Control (SQC) methods. The limits are used to calculate National’s AOQL.
(2) This over temperature limit for Reverse Breakdown Voltage Tolerance is defined as the room temperature Reverse Breakdown Voltage Tolerance ±[(∆VR/∆T)(max∆T)(VR)]. Where, ∆VR/∆T is the VR temperature coefficient, max∆T is the maximum difference in temperature from the reference point of 25°̊C to TMAX or TMIN, and VR is the reverse breakdown voltage. The total over temperature tolerance for the different grades in the industrial temperature range where max∆T=65̊C is shown below:
  • A-grade: ±0.425% = ±0.1% ±50 ppm/°̊C x 65°̊C
  • B-grade: ±0.525% = ±0.2% ±50 ppm/°̊C x 65°̊C
  • C-grade: ±0.825% = ±0.5% ±50 ppm/°̊C x 65°̊C
Therefore, as an example, the A-grade LM4051-1.2 has an over-temperature Reverse Breakdown Voltage tolerance of ± 1.2V x 0.425% = ± 5.2mV.
(3) Long-term stability is VR at 25°̊C measured during 1000 hrs.
(4) 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.