SNOS491D February   2000  – September 2018 LM4051-N

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1. 1.2 VREF Simplified Schematic
      2.      Adjustable Reference Simplified Schematic
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 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 LM4051-1.2 Electrical Characteristics
    6. 6.6 LM4051-ADJ Electrical Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
    4. 8.4 Device Functional Modes
      1. 8.4.1 LM4051-N - 1.2 V
      2. 8.4.2 LM4051-N - ADJ
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Shunt Regulator
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Adjustable Shunt Regulator
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
    3. 9.3 System Examples
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Receiving Notification of Documentation Updates
    2. 12.2 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

6.5 LM4051-1.2 Electrical Characteristics

over operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VR Reverse Breakdown Voltage IR = 100 μA 1.225 V
Reverse Breakdown Voltage Tolerance(2) IR = 100 μA LM4051AIM3(1) ±1.2 mV
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)
IRMIN Minimum Operating Current TJ = 25°C 39 µA
Industrial Temp. Range
TA = TJ = TMIN to TMAX 		65
Extended Temp. Range
TA = TJ = TMIN to TMAX 		70
∆VR/∆T Average Reverse Breakdown Voltage Temperature Coefficient(2) IR =10 mA ±20 ppm/ ̊C
IR =1 mA ±15
IR = 100 μA
∆T = −40 ̊C to 125 ̊C 		TJ = 25°C ±15
TA = TJ = TMIN to TMAX ±50(2)
∆VR/∆IR Reverse Breakdown Voltage Change with Operating Current Change IRMIN ≤ IR ≤ 1 mA TJ = 25°C 0.3 mV
Industrial Temp. Range
TA = TJ = TMIN to TMAX 		1.1(2)
Extended Temp. Range
TA = TJ = TMIN to TMAX 		1.5(2)
1 mA ≤ IR ≤ 12 mA TJ = 25°C 1.8
Industrial Temp. Range
TA = TJ = TMIN to TMAX 		6(2)
Extended Temp. Range
TA = TJ = TMIN to TMAX 		8(2)
ZR Reverse Dynamic Impedance IR = 1 mA, f = 120 Hz 0.5 Ω
eN Wideband Noise IR = 100 μA
10 Hz ≤ f ≤ 10 kHz 		20 μVrms
∆VR Reverse Breakdown Voltage Long Term Stability(3) t = 1000 hrs, T = 25 ̊C ± 0.1 ̊C, IR = 100 μA 120 ppm
VHYST Thermal Hysteresis(4) ∆T = −40 ̊C to 125 ̊C 0.36 mV/V
(1) Limits are 100% production tested at 25 ̊C. Limits over temperature are guaranteed through correlation using Statistical Quality Control (SQC) methods. The limits are used to calculate National’s AOQL.
(2) This overtemperature 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 overtemperature tolerance for the different grades in the industrial temperature range where max∆T=65 ̊C 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% = ± 5.2 mV.
(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.