SNVSAA9 October   2017 LM138QML

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 Recommended Operating Conditions
    3. 6.3 Thermal Information
    4. 6.4 Electrical Characteristics
    5. 6.5 Quality Conformance Inspection
    6. 6.6 Typical Performance Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 NPN Darlington Output Drive
      2. 7.3.2 Overload Block
      3. 7.3.3 Programmable Feedback
    4. 7.4 Device Functional Modes
      1. 7.4.1 Normal Operation
      2. 7.4.2 Operation With Low Input Voltage
      3. 7.4.3 Operation at Light Loads
      4. 7.4.4 Operation in Self Protection
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Constant 5-V Regulator
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 External Capacitors
          2. 8.2.1.2.2 Load Regulation
          3. 8.2.1.2.3 Protection Diodes
        3. 8.2.1.3 Application Curves
    3. 8.3 System Examples
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)(1)
MIN MAX UNIT
Power dissipation Internally limited
Input and output voltage differential –0.3 40 V
Storage temperature, Tstg –65 150 °C
Lead temperature (soldering, 10 seconds) 300 °C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

6.2 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)
MIN MAX UNIT
Operating temperature, TJ –55 150 °C
Input-to-output voltage differential 3 40 V
Output current 5 A

6.3 Thermal Information

THERMAL METRIC(1) LM138QML UNIT
K (TO-3)
2 PINS
RθJA Junction-to-ambient thermal resistance 42.8 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 3.3 °C/W
ψJT Junction-to-top characterization parameter 2.5 °C/W
ψJB Junction-to-board characterization parameter 37.4 °C/W
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.

6.4 Electrical Characteristics

Values apply for VIN – VOUT = 5 V; and IOUT = 10 mA (unless otherwise noted)(1)
PARAMETER TEST CONDITIONS SUB-GROUPS MIN TYP(3) MAX UNIT
VREF Reference voltage VIN – VOUT = 3 V(5) [1, 2, 3] 1.19 1.29 V
VIN – VOUT = 3 V, IOUT = 5 A [1, 2, 3] 1.19 1.29
VIN – VOUT = 5 V, IOUT = 7 A [1, 2, 3] 1.19 1.29
VIN – VOUT = 35 V [1, 2, 3] 1.19 1.29
VIN – VOUT = 35 V, IOUT = 150 mA [1, 2, 3] 1.19 1.29
VRLINE Line regulation(2) 3 V ≤ (VIN – VOUT) ≤ 35 V [1] –3.5 3.5 mV
3.3 V ≤ (VIN – VOUT) ≤ 35 V [2, 3] –14 14
VRLOAD Load regulation(2) VIN – VOUT = 3 V, 10 mA ≤ IOUT ≤ 5 A, VOUT = VREF [1] –3.8 3.8 mV
VIN – VOUT = 3.3 V, 10 mA ≤ IOUT ≤ 5 A, VOUT = VREF [2, 3] –8 8
VIN – VOUT = 35 V, 10 mA ≤ IOUT ≤ 150 mA, VOUT = VREF [1] –3.8 3.8
[2, 3] –8 8
VRTH Thermal regulation VIN – VOUT = 10 V, pulse = 20 ms,
IOUT = 1 A(4)		 [1] 0.002 0.01 %/W
IADJ Adjustment pin current VIN – VOUT = 3 V(5) [1, 2, 3] 2 45 100 μA
VIN – VOUT = 35 V [1, 2, 3] 2 100
ΔIADJ Adjustment pin current change 3 V ≤ (VIN – VOUT) ≤ 35 V(5) [1, 2, 3] –5 0.2 5 μA
10 mA ≤ IOUT ≤ 5 A [1, 2, 3] –5 5
ILOAD(MIN) Minimum load current VIN – VOUT = 3 V, VOUT = 1.4 V(5) [1, 2, 3] 0.5 5 mA
VIN – VOUT = 35 V, VOUT = 1.4 V [1, 2, 3] 0.5 3.5 5
ICL Current limit VIN – VOUT = 10 V, T = 0.5 ms,
VOUT = 0 V		 [1, 2, 3] 7 16 A
T = 5 ms, VOUT = 0 V [1, 2, 3] 5 15
ΔVR/ΔVIN Ripple rejection ratio VOUT = VREF, eIN = 1 VRMS, f = 120 Hz, IOUT = 500 mA(6) [4] 60 dB
(1) These specifications are applicable for power dissipations up to 50W. Power dissipation is specified at these values up to 15-V input-output differential. Above 15-V differential, power dissipation will be 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.
(3) Typical figures are at TA = 25°C, and represent most likely parametric norms. Test limits are ensured to Texas Instruments' average outgoing quality level (AOQL).
(4) Datalog reading in mV, 0.01% = 1.19 mV.
(5) VIN – VOUT = 3.3 V at –55°C and 125°C.
(6) Family board not required for this device.

6.5 Quality Conformance Inspection

MIL-STD-883, Method 5005 - Group A

SUBGROUP DESCRIPTION TEMPERATURE (°C)
1 Static tests at 25
2 Static tests at 125
3 Static tests at –55
4 Dynamic tests at 25
5 Dynamic tests at 125
6 Dynamic tests at –55
7 Functional tests at 25
8A Functional tests at 125
8B Functional tests at –55
9 Switching tests at 25
10 Switching tests at 125
11 Switching tests at –55
12 Setting time at 25
13 Setting time at 125
14 Setting time at –55

6.6 Typical Performance Characteristics

LM138QML 00906032.png Figure 1. Current Limit
LM138QML 00906034.png Figure 3. Current Limit
LM138QML 00906036.png Figure 5. Dropout Voltage
LM138QML 00906038.png Figure 7. Temperature Stability
LM138QML 00906040.png Figure 9. Minimum Operating Current
LM138QML 00906042.png Figure 11. Ripple Rejection
LM138QML 00906044.png Figure 13. Line Transient Response
LM138QML 00906033.png Figure 2. Current Limit
LM138QML 00906035.png Figure 4. Load Regulation
LM138QML 00906037.png Figure 6. Adjustment Current
LM138QML 00906039.png Figure 8. Output Impedance
LM138QML 00906041.png Figure 10. Ripple Rejection
LM138QML 00906043.png Figure 12. Ripple Rejection
LM138QML 00906045.png Figure 14. Load Transient Response