SNVSAG3B November   2015  – December 2024 LMR14030-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 Over Current 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

Package Options

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

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 = 4.0V to 40V
PARAMETERTEST CONDITIONSMINTYPMAXUNIT
POWER SUPPLY (VIN PIN)
VINOperation input voltage440V
UVLOUndervoltage lockout thresholdsRising threshold3.53.73.9V
Hysteresis285mV
ISHDNShutdown supply currentVEN = 0 V, TJ = 25°C, 4.0 V ≤ VIN ≤ 40 V1.03.0μA
IQOperating quiescent current (non- switching)VFB = 1.0 V, TJ = 25°C40μA
ENABLE (EN PIN)
VEN_THEN threshold voltage1.051.201.38V
IEN_PINEN PIN currentEnable threshold +50 mV-4.6μA
Enable threshold –50 mV-1.0
IEN_HYSEN hysteresis current-3.6μA
EXTERNAL SOFT-START
ISSSS pin currentTJ = 25°C-3μA
POWER GOOD (PGOOD PIN)
VPG_UVPower-good flag under voltage tripping thresholdPOWER GOOD (% of FB voltage)94%
POWER BAD (% of FB voltage)92%
VPG_OVPower-good flag over voltage tripping thresholdPOWER BAD (% of FB voltage)109%
POWER GOOD (% of FB voltage)107%
VPG_HYSPower-good flag recovery hysteresis% of FB voltage2%
IPGPGOOD leakage current at high level outputVPull-Up = 5 V10200nA
VPG_LOWPGOOD low level output voltageIPull-Up = 1 mA0.1V
VIN_PG_MINMinimum VIN for valid PGOOD outputVPull-Up < 5 V at IPull-Up = 100 μA1.61.95V
VOLTAGE REFERENCE (FB PIN)
VFBFeedback voltageTJ = 25°C0.7440.7500.756V
TJ = –40°C to 125 °C0.7350.7500.765V
HIGH-SIDE MOSFET
RDS_ONOn-resistanceVIN = 12 V90180mΩ
HIGH-SIDE MOSFET CURRENT LIMIT
ILIMTCurrent limitVIN = 12 V, TJ = –40°C to 125°C, Open Loop4.15.57.7A
THERMAL PERFORMANCE
TSHDNThermal shutdown threshold170°C
THYSHysteresis12