ZHCSYA6D May   1998  – May 2025 LM138 , LM338

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 Recommended Operating Conditions
    3. 5.3 Thermal Information
    4. 5.4 Electrical Characteristics: LM138
    5. 5.5 Electrical Characteristics: LM338
    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 NPN Darlington Output Drive
      2. 6.3.2 Overload Block
      3. 6.3.3 Programmable Feedback
    4. 6.4 Device Functional Modes
      1. 6.4.1 Normal Operation
      2. 6.4.2 Operation With Low Input Voltage
      3. 6.4.3 Operation at Light Loads
      4. 6.4.4 Operation in Self Protection
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Applications
      1. 7.2.1 Constant 5-V Regulator
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
          1. 7.2.1.2.1 External Capacitors
          2. 7.2.1.2.2 Load Regulation
          3. 7.2.1.2.3 Protection Diodes
        3. 7.2.1.3 Application Curves
    3. 7.3 System Examples
    4. 7.4 Power Supply Recommendations
    5. 7.5 Layout
      1. 7.5.1 Layout Guidelines
      2. 7.5.2 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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5.4 Electrical Characteristics: LM138

Values apply for TJ = 25°C; VIN – VOUT = 5 V; and IOUT = 10 mA (unless otherwise noted).(1)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VREF Reference voltage 3 V ≤ (VIN – VOUT) ≤ 35 V, 10 mA ≤ IOUT ≤ 5 A, P ≤ 50 W,
TJ = –55°C to 150°C		 1.19 1.24 1.29 V
VRLINE Line regulation 3 V ≤ (VIN – VOUT) ≤ 35 V(2) TJ = 25°C 0.005% 0.01% V
TJ = –55°C to 150°C 0.02% 0.04% V
VRLOAD Load regulation 10 mA ≤ IOUT ≤ 5 A(2) TJ = 25°C 0.1% 0.3%
TJ = –55°C to 150°C 0.3% 0.6%
Thermal regulation 20 ms pulse 0.002% 0.01% W
IADJ Adjustment pin current TJ = –55°C to 150°C 45 100 µA
ΔIADJ Adjustment pin current change 10 mA ≤ IOUT ≤ 5 A, 3 V ≤ (VIN – VOUT) ≤ 35 V,
TJ = –55°C to 150°C		 0.2 5 µA
ΔVR/T Temperature stability TJ = –55°C to 150°C 1%
ILOAD(MIN) Minimum load current VIN – VOUT = 35 V, TJ = –55°C to 150°C 3.5 5 mA
ICL Current limit VIN – VOUT ≤ 10 V
DC, TJ = –55°C to 150°C 5 8 A
0.5-ms peak, TJ = –55°C to 150°C 7 12 A
VIN – VOUT = 30 V 1 1 A
VN RMS output noise
(percent of VOUT)		 10 Hz ≤ f ≤ 10 kHz 0.003%
ΔVR/ΔVIN Ripple rejection ratio VOUT = 10 V, f = 120 Hz, CADJ = 0 µF,
TJ = –55°C to 150°C		 60 dB
VOUT = 10 V, f = 120 Hz, CADJ = 10 µF,
TJ = –55°C to 150°C		 60 75 dB
Long-term stability TJ = 125°C, 1000 Hrs 0.3% 1%
(1) These specifications are applicable for power dissipation up to 50 W for the TO-3 (NDS) package and 25 W for the TO-220 (NDE) package. Power dissipation is specified at these values up to 15-V input-output differential. Above 15-V differential, power dissipation is limited by internal protection circuitry. All limits (that is, the numbers in the minimum and maximum columns) are specified to TI's AOQL (Average Outgoing Quality Level).
(2) Regulation is measured at a constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are covered under the specifications for thermal regulation.