ZHCSTG3H September   1999  – March 2024 LM1084

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Pin Configuration and 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 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Ripple Rejection
      2. 6.3.2 Load Regulation
      3. 6.3.3 Overload Recovery
    4. 6.4 Device Functional Modes
      1. 6.4.1 Output Voltage
      2. 6.4.2 Stability Consideration
      3. 6.4.3 Protection Diodes
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Applications
      1. 7.2.1  1.2-V to 15-V Adjustable Regulator
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
        3. 7.2.1.3 Application Curve
      2. 7.2.2  Adjustable at 5 V
      3. 7.2.3  5-V Regulator With Shutdown
      4. 7.2.4  Battery Charger
      5. 7.2.5  Adjustable Fixed Regulator
      6. 7.2.6  Regulator with Reference
      7. 7.2.7  High Current Lamp Driver Protection
      8. 7.2.8  Battery Backup Regulated Supply
      9. 7.2.9  Ripple Rejection Enhancement
      10. 7.2.10 Automatic Light Control
      11. 7.2.11 Generating Negative Supply Voltage
      12. 7.2.12 Remote Sensing
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
        1. 7.4.1.1 Thermal Considerations
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 接收文档更新通知
    2. 8.2 支持资源
    3. 8.3 Trademarks
    4. 8.4 静电放电警告
    5. 8.5 术语表
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

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5.5 Electrical Characteristics

Typicals and limits apply for TJ = 25°C unless specified otherwise.
PARAMETER TEST CONDITIONS MIN(1) TYP(2) MAX(1) UNIT
VREF Reference Voltage LM1084-ADJ, IOUT = 10 mA, VIN − VOUT = 3 V, 10 mA ≤ IOUT ≤ IFULL LOAD,1.5 V ≤ (VIN−VOUT) ≤ 25 V(3) 1.238 1.250 1.262 V
LM1084-ADJ, IOUT = 10 mA, VIN − VOUT = 3 V, 10 mA ≤ IOUT ≤ IFULL LOAD,1.5 V ≤ (VIN−VOUT) ≤ 25 V(3), –40°C ≤ TJ ≤ 125°C 1.225 1.250 1.270
VOUT Output Voltage(3) LM1084-3.3, IOUT = 0 mA, VIN = 8 V, 0 ≤ IOUT ≤ IFULL LOAD, 4.8 V ≤ VIN ≤ 15 V 3.270 3.300 3.330 V
LM1084-3.3, IOUT = 0 mA, VIN = 8 V, 0 ≤ IOUT ≤ IFULL LOAD, 4.8 V ≤ VIN ≤ 15 V , –40°C ≤ TJ ≤ 125°C 3.235 3.300 3.365
LM1084-5.0, IOUT = 0 mA, VIN = 8 V, 0 ≤ IOUT ≤ IFULL LOAD, 6.5 V ≤ VIN ≤ 20 V 4.950 5.000 5.050 V
LM1084-5.0, IOUT = 0 mA, VIN = 8 V, 0 ≤ IOUT ≤ IFULL LOAD, 6.5 V ≤ VIN ≤ 20 V, –40°C ≤ TJ ≤ 125°C 4.900 5.000 5.100
ΔVOUT Line Regulation(4) LM1084-ADJ, IOUT = 10 mA, 1.5 V ≤ (VIN – VOUT) ≤ 15 V 0.015% 0.2%
LM1084-ADJ, IOUT = 10 mA, 1.5 V ≤ (VIN – VOUT) ≤ 15 V, –40°C ≤ TJ ≤ 125°C 0.035% 0.2%
LM1084-3.3, IOUT = 0 mA, 4.8 V ≤ VIN ≤ 15 V 0.5 6 mV
LM1084-3.3, IOUT = 0 mA, 4.8 V ≤ VIN ≤ 15 V, –40°C ≤ TJ ≤ 125°C 1.0 6
LM1084-5.0, IOUT = 0 mA, 6.5 V ≤ VIN ≤ 20 V 0.5 10 mV
LM1084-5.0, IOUT = 0 mA, 6.5 V ≤ VIN ≤ 20 V, –40°C ≤ TJ ≤ 125°C 1.0 10
ΔVOUT Load Regulation(4) LM1084-ADJ, (VIN – V OUT) = 3 V, 10 mA ≤ IOUT ≤ IFULL LOAD 0.1 % 0.3%
LM1084-ADJ, (VIN – V OUT) = 3 V, 10 mA ≤ IOUT ≤ IFULL LOAD, –40°C ≤ TJ ≤ 125°C 0.2% 0.4%
LM1084-3.3, VIN = 5 V, 0 ≤ IOUT ≤ IFULL LOAD 3 15 mV
LM1084-3.3, VIN = 5 V, 0 ≤ IOUT ≤ IFULL LOAD, –40°C ≤ TJ ≤ 125°C 7 20
LM1084-5.0, VIN = 8 V, 0 ≤ IOUT ≤ IFULL LOAD 5 20 mV
LM1084-5.0, VIN = 8 V, 0 ≤ IOUT ≤ IFULL LOAD, –40°C ≤ TJ ≤ 125°C 10 35
Dropout Voltage(5) LM1084-ADJ, 3.3, 5, 12, ΔVREF, ΔVOUT = 1%, IOUT = 5A, –40°C ≤ TJ ≤ 125°C 1.3 1.5 V
ILIMIT Current Limit LM1084-ADJ, VIN− VOUT = 5 V, –40°C ≤ TJ ≤ 125°C 5.5 8.0 A
LM1084-ADJ, VIN− VOUT = 25 V, –40°C ≤ TJ ≤ 125°C 0.3 0.6
LM1084-3.3, VIN = 8 V, –40°C ≤ TJ ≤ 125°C 5.5 8.0 A
LM1084-5.0, VIN = 10 V, –40°C ≤ TJ ≤ 125°C 5.5 8.0 A
Minimum Load Current(6) LM1084-ADJ, VIN − VOUT = 25 V 5 10.0 mA
Quiescent Current LM1084-3.3, VIN = 18 V 5.0 10.0 mA
LM1084-5.0, VIN ≤ 20 V 5.0 10.0 mA
Thermal Regulation TA = 25°C, 30 ms Pulse 0.003 0.015 %/W
Ripple Rejection fRIPPLE = 120 Hz, = COUT = 25 µF Tantalum, IOUT = 5A dB
LM1084-ADJ, CADJ, = 25 µF, (VIN − VO) = 3 V, –40°C ≤ TJ ≤ 125°C 60 75
LM1084-3.3, VIN = 6.3 V, –40°C ≤ TJ ≤ 125°C 60 72 dB
LM1084-5.0, VIN = 8 V, –40°C ≤ TJ ≤ 125°C 60 68 dB
Adjust Pin Current LM1084 55 µA
LM1084, –40°C ≤ TJ ≤ 125°C 120
Adjust Pin Current Change 10 mA ≤ IOUT ≤ IFULL LOAD, 1.5 V ≤ VIN − VOUT ≤ 25 V, –40°C ≤ TJ ≤ 125°C 0.2 5 µA
Temperature Stability –40°C ≤ TJ ≤ 125°C 0.5%
Long Term Stability TA =125°C, 1000 Hrs 0.3% 1.0%
RMS Output Noise (% of VOUT) 10 Hz ≤ f≤ 10 kHz 0.003%
(1) All limits are specified by testing or statistical analysis.
(2) Typical Values represent the most likely parametric norm.
(3) IFULLLOAD is defined in the current limit curves. The IFULLLOAD Curve defines the current limit as a function of input-to-output voltage. Note that 30W power dissipation for the LM1084 is only achievable over a limited range of input-to-output voltage.
(4) Load and line regulation are measured at constant junction temperature, and are ensured up to the maximum power dissipation of 30W. Power dissipation is determined by the input/output differential and the output current. ensured maximum power dissipation will not be available over the full input/output range.
(5) Dropout voltage is specified over the full output current range of the device.
(6) The minimum output current required to maintain regulation.