SNVS690I January   2011  – August 2021 LMZ14201H

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 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
      1. 7.1.1 COT Control Circuit Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Output Overvoltage Comparator
      2. 7.3.2 Current Limit
      3. 7.3.3 Thermal Protection
      4. 7.3.4 Zero Coil Current Detection
      5. 7.3.5 Prebiased Start-Up
    4. 7.4 Device Functional Modes
      1. 7.4.1 Discontinuous Conduction and Continuous Conduction Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Design Steps for the LMZ14201H Application
          1. 8.2.2.1.1 Enable Divider, RENT and RENB Selection
          2. 8.2.2.1.2 Output Voltage Selection
          3. 8.2.2.1.3 Soft-Start Capacitor, CSS, Selection
          4. 8.2.2.1.4 Output Capacitor, CO, Selection
            1. 8.2.2.1.4.1 Capacitance
            2. 8.2.2.1.4.2 ESR
          5. 8.2.2.1.5 Input Capacitor, CIN, Selection
          6. 8.2.2.1.6 ON-Time, RON, Resistor Selection
            1. 8.2.2.1.6.1 Discontinuous Conduction and Continuous Conduction Mode Selection
      3. 8.2.3 Application Curve
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Power Module SMT Guidelines
    2. 10.2 Layout Example
      1. 10.2.1 Power Dissipation and Board Thermal Requirements
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

6.5 Electrical Characteristics

Minimum and maximum limits are ensured 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 stated the following conditions apply: VIN = 24 V, VOUT = 12 V, RON = 249 kΩ
PARAMETER TEST CONDITIONS MIN(1) TYP(2) MAX(1) UNIT
SYSTEM PARAMETERS
ENABLE CONTROL
VEN EN threshold trip point VEN rising, TJ = –40°C to 125°C 1.10 1.18 1.25 V
VEN-HYS EN threshold hysteresis 90 mV
SOFT-START
ISS SS source current VSS = 0 V, TJ = –40°C to 125°C 8 10 15 µA
ISS-DIS SS discharge current –200 µA
CURRENT LIMIT
ICL Current limit threshold DC average, TJ = –40°C to 125°C 1.5 1.95 2.7 A
VIN UVLO
VINUVLO Input UVLO EN pin floating
VIN rising		 3.75 V
VINUVLO-HYST Hysteresis EN pin floating
VIN falling		 130 mV
ON/OFF TIMER
tON-MIN ON timer minimum pulse width 150 ns
tOFF OFF timer pulse width 260 ns
REGULATION AND OVERVOLTAGE COMPARATOR
VFB In-regulation feedback voltage VIN = 24 V, VOUT = 12 V
VSS >+ 0.8 V
TJ = –40°C to 125°C
IOUT = 10 mA to 1 A		 0.782 0.803 0.822 V
VIN = 24 V, VOUT = 12 V
VSS >+ 0.8 V
TJ = 25°C
IOUT = 10 mA to 1 A		 0.786 0.803 0.818
VFB In-regulation feedback voltage VIN = 36 V, VOUT = 24 V
VSS >+ 0.8 V
TJ = –40°C to 125°C
IOUT = 10 mA to 1 A		 0.780 0.803 0.823 V
VIN = 36 V, VOUT = 24 V
VSS >+ 0.8 V
TJ = 25°C
IOUT = 10 mA to 1 A		 0.787 0.803 0.819
VFB-OVP Feedback overvoltage protection threshold 0.92 V
IFB Feedback input bias current 5 nA
IQ Non-Switching Input Current VFB= 0.86 V 1 mA
ISD Shut Down Quiescent Current VEN= 0 V 25 μA
THERMAL CHARACTERISTICS
TSD Thermal shutdown (rising) 165 °C
TSD-HYST Thermal shutdown hysteresis 15 °C
PERFORMANCE PARAMETERS
ΔVOUT Output Voltage Ripple VOUT = 5 V, COUT = 100 µF 6.3 V X7R 8 mVPP
ΔVOUT/ΔVIN Line Regulation VIN = 16 V to 42 V, IOUT= 1 A 0.01%
ΔVOUT/ΔIOUT Load Regulation VIN = 24 V, IOUT= 0 A to 1 A 1.5 mV/A
η Efficiency VIN = 24 V, VOUT = 12 V, IOUT = 0.5 A 94%
η Efficiency VIN = 24 V, VOUT = 12 V, IOUT = 1 A 92%
(1) Minimum and Maximum limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through correlation using Statistical Quality Control (SQC) methods. Limits are used to calculate Average Outgoing Quality Level (AOQL).
(2) Typical numbers are at 25°C and represent the most likely parametric norm.