SNVSAG4B November   2015  – December 2024 LMR14020-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  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 Switching Characteristics
    7. 5.7 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  Fixed Frequency Peak Current Mode Control
      2. 6.3.2  Slope Compensation
      3. 6.3.3  Sleep Mode
      4. 6.3.4  Low Dropout Operation and Bootstrap Voltage (BOOT)
      5. 6.3.5  Adjustable Output Voltage
      6. 6.3.6  Enable and Adjustable Undervoltage Lockout
      7. 6.3.7  External Soft-start
      8. 6.3.8  Switching Frequency and Synchronization (RT/SYNC)
      9. 6.3.9  Power Good (PGOOD)
      10. 6.3.10 Overcurrent and Short-Circuit Protection
      11. 6.3.11 Overvoltage Protection
      12. 6.3.12 Thermal Shutdown
    4. 6.4 Device Functional Modes
      1. 6.4.1 Shutdown Mode
      2. 6.4.2 Active Mode
      3. 6.4.3 CCM Mode
      4. 6.4.4 Light Load Operation
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Output Voltage Set-Point
        2. 7.2.2.2 Switching Frequency
        3. 7.2.2.3 Output Inductor Selection
        4. 7.2.2.4 Output Capacitor Selection
        5. 7.2.2.5 Schottky Diode Selection
        6. 7.2.2.6 Input Capacitor Selection
        7. 7.2.2.7 Bootstrap Capacitor Selection
        8. 7.2.2.8 Soft-start Capacitor Selection
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Third-Party Products Disclaimer
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
      2. 8.2.2 Related Products
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Support Resources
    5. 8.5 Trademarks
    6. 8.6 Electrostatic Discharge Caution
    7. 8.7 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

5.5 Electrical Characteristics

Limits apply over the recommended operating junction temperature (TJ) range of –40°C to +125°C, unless otherwise stated. Minimum and Maximum limits are specified through test, design or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless otherwise specified, the following conditions apply: VIN = 4.0 V to 40 V
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
POWER SUPPLY (VIN PIN)
VIN Operation input voltage 4 40 V
UVLO Undervoltage lockout thresholds Rising threshold 3.5 3.7 3.9 V
Hysteresis 285 mV
ISHDN Shutdown supply current VEN = 0 V, TJ = 25°C, 4.0 V ≤ VIN ≤ 40 V 1.0 3.0 μA
IQ Operating quiescent current (non- switching) VFB = 1.0 V, TJ = 25°C 40 μA
ENABLE (EN PIN)
VEN_TH EN threshold voltage 1.05 1.20 1.38 V
IEN_PIN EN PIN current Enable threshold +50 mV -4.6 μA
Enable threshold –50 mV -1.0
IEN_HYS EN hysteresis current -3.6 μA
EXTERNAL SOFT-START
ISS SS pin current TJ = 25°C -3.0 μA
POWER GOOD (PGOOD PIN)
VPG_UV Power-good flag under voltage tripping threshold POWER GOOD (% of FB voltage) 94%
POWER BAD (% of FB voltage) 92%
VPG_OV Power-good flag over voltage tripping threshold POWER BAD (% of FB voltage) 109%
POWER GOOD (% of FB voltage) 107%
VPG_HYS Power-good flag recovery hysteresis % of FB voltage 2%
IPG PGOOD leakage current at high level output VPull-Up = 5 V 10 200 nA
VPG_LOW PGOOD low level output voltage IPull-Up = 1 mA 0.1 V
VIN_PG_MIN Minimum VIN for valid PGOOD output VPull-Up < 5 V at IPull-Up = 100 μA 1.6 1.95 V
VOLTAGE REFERENCE (FB PIN)
VFB Feedback voltage TJ = 25°C 0.744 0.750 0.756 V
TJ = –40°C to 125 °C 0.735 0.750 0.765 V

Output voltage accuracy for fixed 5VOUT

 TJ = 25°C

4.96

5.0

5.04

V
TJ = –40°C to 125 °C

4.90

5.0

5.10

V
HIGH-SIDE MOSFET
RDS_ON On-resistance VIN = 12 V 90 180 mΩ
HIGH-SIDE MOSFET CURRENT LIMIT
ILIMT Current limit VIN = 12 V, TJ = –40°C to 125°C, Open Loop 2.13 3.15 4.6 A
THERMAL PERFORMANCE
TSHDN Thermal shutdown threshold 170 °C
THYS Hysteresis 12