SNVSBA0E February   2020  – October 2025 LM61480-Q1 , LM61495-Q1 , LM62460-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 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 Timing Characteristics
    7. 6.7 Switching Characteristics
    8. 6.8 System Characteristics
    9. 6.9 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Output Voltage Selection
      2. 7.3.2  Enable EN Pin and Use as VIN UVLO
      3. 7.3.3  SYNC/MODE Uses for Synchronization
      4. 7.3.4  Clock Locking
      5. 7.3.5  Adjustable Switching Frequency
      6. 7.3.6  RESET Output Operation
      7. 7.3.7  Internal LDO, VCC UVLO, and BIAS Input
      8. 7.3.8  Bootstrap Voltage and VCBOOT-UVLO (CBOOT Pin)
      9. 7.3.9  Adjustable SW Node Slew Rate
      10. 7.3.10 Spread Spectrum
      11. 7.3.11 Soft Start and Recovery From Dropout
      12. 7.3.12 Overcurrent and Short-Circuit Protection
      13. 7.3.13 Hiccup
      14. 7.3.14 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Mode
      2. 7.4.2 Standby Mode
      3. 7.4.3 Active Mode
        1. 7.4.3.1 Peak Current Mode Operation
        2. 7.4.3.2 Auto Mode Operation
          1. 7.4.3.2.1 Diode Emulation
        3. 7.4.3.3 FPWM Mode Operation
        4. 7.4.3.4 Minimum On-time (High Input Voltage) Operation
        5. 7.4.3.5 Dropout
        6. 7.4.3.6 Recovery from Dropout
        7. 7.4.3.7 Other Fault Modes
  9. 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  Choosing the Switching Frequency
        2. 8.2.2.2  Setting the Output Voltage
        3. 8.2.2.3  Inductor Selection
        4. 8.2.2.4  Output Capacitor Selection
        5. 8.2.2.5  Input Capacitor Selection
        6. 8.2.2.6  BOOT Capacitor
        7. 8.2.2.7  BOOT Resistor
        8. 8.2.2.8  VCC
        9. 8.2.2.9  CFF and RFF Selection
        10. 8.2.2.10 RSPSP Selection
        11. 8.2.2.11 RT Selection
        12. 8.2.2.12 RMODE Selection
        13. 8.2.2.13 External UVLO
        14. 8.2.2.14 Maximum Ambient Temperature
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
        1. 8.4.1.1 Ground and Thermal Considerations
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

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

8.2.3 Application Curves

Unless otherwise specified, the following conditions apply: device: LM61495-Q1, VIN = 13.5 V, TA = 25°C. Figure 8-1 shows the circuit, with the appropriate BOM from Table 8-4.

LM61480-Q1 LM61495-Q1 LM62460-Q1 Efficiency
VOUT = 5 V FSW = 400 kHz Auto mode
Figure 8-5 Efficiency
LM61480-Q1 LM61495-Q1 LM62460-Q1 Efficiency
VOUT = 3.3 V FSW = 400 kHz Auto mode
Figure 8-7 Efficiency
LM61480-Q1 LM61495-Q1 LM62460-Q1 Efficiency
VOUT = 5 V FSW = 2.2 MHz Auto mode
Figure 8-9 Efficiency
LM61480-Q1 LM61495-Q1 LM62460-Q1 Efficiency
VOUT = 3.3 V FSW = 2.2 MHz Auto mode
Figure 8-11 Efficiency
LM61480-Q1 LM61495-Q1 LM62460-Q1 Load and Line Regulation
VOUT = 5 V FSW = 400 kHz Auto mode
Figure 8-13 Load and Line Regulation
LM61480-Q1 LM61495-Q1 LM62460-Q1 Load and Line Regulation
VOUT = 3.3 V FSW = 400 kHz Auto mode
Figure 8-15 Load and Line Regulation
LM61480-Q1 LM61495-Q1 LM62460-Q1 Load and Line Regulation
VOUT = 5 V FSW = 2.2 MHz Auto mode
Figure 8-17 Load and Line Regulation
LM61480-Q1 LM61495-Q1 LM62460-Q1 Load and Line Regulation
VOUT = 3.3 V FSW = 2.2 MHz Auto mode
Figure 8-19 Load and Line Regulation
LM61480-Q1 LM61495-Q1 LM62460-Q1 Dropout
VOUT = 5 V FSW = 400 kHz Auto mode
Figure 8-21 Dropout
LM61480-Q1 LM61495-Q1 LM62460-Q1 Dropout
VOUT = 5 V FSW = 2.2 MHz Auto mode
Figure 8-23 Dropout
LM61480-Q1 LM61495-Q1 LM62460-Q1 Frequency Dropout
VOUT = 5 V FSW = 400 kHz Auto mode
Figure 8-25 Frequency Dropout
LM61480-Q1 LM61495-Q1 LM62460-Q1 Frequency Dropout
VOUT = 5 V FSW = 2.2 MHz Auto mode
Figure 8-27 Frequency Dropout
LM61480-Q1 LM61495-Q1 LM62460-Q1 Switching Waveform and VOUT Ripple
VOUT = 5 V FSW = 2100 kHz Auto mode
IOUT = 50 mA VIN = 13.5 V
Figure 8-29 Switching Waveform and VOUT Ripple
LM61480-Q1 LM61495-Q1 LM62460-Q1 Start-up with 50-mA Load
VOUT = 5 V FSW = 2100 kHz Auto mode
IOUT = 50 mA VIN = 13.5 V
Figure 8-31 Start-up with 50-mA Load
LM61480-Q1 LM61495-Q1 LM62460-Q1 Start-up with 3.25-A Load
VOUT = 3.3 V FSW = 2100 kHz FPWM mode
IOUT = 3.25 A VIN = 13.5 V
Figure 8-33 Start-up with 3.25-A Load
LM61480-Q1 LM61495-Q1 LM62460-Q1 Short Circuit Recovery
VOUT = 5 V FSW = 2100 kHz FPWM mode
IOUT = Short Circuit to 5 A VIN = 13.5 V
Figure 8-35 Short Circuit Recovery
LM61480-Q1 LM61495-Q1 LM62460-Q1 Load Transient
VOUT = 5 V FSW = 400 kHz Auto mode
IOUT = 10 mA to 10 A to 10 mA VIN = 13.5 V TR = TF = 1 µs
Figure 8-37 Load Transient
LM61480-Q1 LM61495-Q1 LM62460-Q1 Load Transient
VOUT = 5 V FSW = 400 kHz Auto mode
IOUT = 2 A to 4 A to 2 A VIN = 13.5 V TR = TF = 1 µs
Figure 8-39 Load Transient
LM61480-Q1 LM61495-Q1 LM62460-Q1 Load Transient
VOUT = 3.3 V FSW = 400 kHz Auto mode
IOUT = 10 mA to 10 A to 10 mA VIN = 13.5 V TR = TF = 1 µs
Figure 8-41 Load Transient
LM61480-Q1 LM61495-Q1 LM62460-Q1 Load Transient
VOUT = 5 V FSW = 2200 kHz FPWM mode
IOUT = 10 mA to 10 A to 10 mA VIN = 13.5 V TR = TF = 1 µs
Figure 8-43 Load Transient
LM61480-Q1 LM61495-Q1 LM62460-Q1 Load Transient
VOUT = 5 V FSW = 2200 kHz Auto mode
IOUT = 5 A to 10 A to 5 A VIN = 13.5 V TR = TF = 1 µs
Figure 8-45 Load Transient
LM61480-Q1 LM61495-Q1 LM62460-Q1 Radiated EMI Bicon Horizontal versus CISPR25 Class 5 Limits
VOUT = 5 V FSW = 400 kHz IOUT = 10 A
Frequency Tested: 30 MHz to 300 MHz
Figure 8-47 Radiated EMI Bicon Horizontal versus CISPR25 Class 5 Limits
LM61480-Q1 LM61495-Q1 LM62460-Q1 Radiated EMI Log Horizontal versus CISPR25 Class 5 Limits
VOUT = 5 V FSW = 400 kHz IOUT = 10 A
Frequency Tested: 300 MHz to 1 GHz
Figure 8-49 Radiated EMI Log Horizontal versus CISPR25 Class 5 Limits
LM61480-Q1 LM61495-Q1 LM62460-Q1 Recommended Input EMI Filter
 
 
 
 
 
Figure 8-51 Recommended Input EMI Filter
LM61480-Q1 LM61495-Q1 LM62460-Q1 Radiated EMI Bicon Horizontal versus CISPR25 Class 5 Limits
VOUT = 5 V FSW = 2.2 MHz IOUT = 4 A
Frequency Tested: 30 MHz to 300 MHz
Figure 8-53 Radiated EMI Bicon Horizontal versus CISPR25 Class 5 Limits
LM61480-Q1 LM61495-Q1 LM62460-Q1 Radiated EMI Log Horizontal versus CISPR25 Class 5 Limits
VOUT = 5 V FSW = 2.2 MHz IOUT = 4 A
Frequency Tested: 300 MHz to 1 GHz
Figure 8-55 Radiated EMI Log Horizontal versus CISPR25 Class 5 Limits
LM61480-Q1 LM61495-Q1 LM62460-Q1 Recommended Input EMI Filter
Figure 8-57 Recommended Input EMI Filter
LM61480-Q1 LM61495-Q1 LM62460-Q1 Efficiency
VOUT = 5 V FSW = 400 kHz FPWM mode
Figure 8-6 Efficiency
LM61480-Q1 LM61495-Q1 LM62460-Q1 Efficiency
VOUT = 3.3 V FSW = 400 kHz FPWM mode
Figure 8-8 Efficiency
LM61480-Q1 LM61495-Q1 LM62460-Q1 Efficiency
VOUT = 5 V FSW = 2.2 MHz FPWM mode
Figure 8-10 Efficiency
LM61480-Q1 LM61495-Q1 LM62460-Q1 Efficiency
VOUT = 3.3 V FSW = 2.2 MHz FPWM mode
Figure 8-12 Efficiency
LM61480-Q1 LM61495-Q1 LM62460-Q1 Load and Line Regulation
VOUT = 5 V FSW = 400 kHz FPWM mode
Figure 8-14 Load and Line Regulation
LM61480-Q1 LM61495-Q1 LM62460-Q1 Load and Line Regulation
VOUT = 3.3 V FSW = 400 kHz FPWM mode
Figure 8-16 Load and Line Regulation
LM61480-Q1 LM61495-Q1 LM62460-Q1 Load and Line Regulation
VOUT = 5 V FSW = 2.2 MHz FPWM mode
Figure 8-18 Load and Line Regulation
LM61480-Q1 LM61495-Q1 LM62460-Q1 Load and Line Regulation
VOUT = 3.3 V FSW = 2.2 MHz FPWM mode
Figure 8-20 Load and Line Regulation
LM61480-Q1 LM61495-Q1 LM62460-Q1 Dropout
VOUT = 3.3 V FSW = 400 kHz Auto mode
Figure 8-22 Dropout
LM61480-Q1 LM61495-Q1 LM62460-Q1 Dropout
VOUT = 3.3 V FSW = 2.2 MHz Auto mode
Figure 8-24 Dropout
LM61480-Q1 LM61495-Q1 LM62460-Q1 Frequency Dropout
VOUT = 3.3 V FSW = 400 kHz Auto mode
Figure 8-26 Frequency Dropout
LM61480-Q1 LM61495-Q1 LM62460-Q1 Frequency Dropout
VOUT = 3.3 V FSW = 2.2 MHz Auto mode
Figure 8-28 Frequency Dropout
LM61480-Q1 LM61495-Q1 LM62460-Q1 Switching Waveform and VOUT Ripple
VOUT = 5 V FSW = 2100 kHz FPWM mode
IOUT = 50 mA VIN = 13.5 V
Figure 8-30 Switching Waveform and VOUT Ripple
LM61480-Q1 LM61495-Q1 LM62460-Q1 Start-up with 50-mA Load
VOUT = 5 V FSW = 2100 kHz FPWM mode
IOUT = 50 mA VIN = 13.5 V
Figure 8-32 Start-up with 50-mA Load
LM61480-Q1 LM61495-Q1 LM62460-Q1 Short Circuit Protection
VOUT = 5 V FSW = 2100 kHz FPWM mode
IOUT = 5 A to Short Circuit VIN = 13.5 V
Figure 8-34 Short Circuit Protection
LM61480-Q1 LM61495-Q1 LM62460-Q1 Recovery from Dropout
VOUT = 5 V FSW = 2100 kHz FPWM mode
IOUT = 4 A VIN = 13.5 V to 4 V to 13.5 V
Figure 8-36 Recovery from Dropout
LM61480-Q1 LM61495-Q1 LM62460-Q1 Load Transient
VOUT = 5 V FSW = 400 kHz FPWM mode
IOUT = 10 mA to 10 A to 10 mA VIN = 13.5 V TR = TF = 1 µs
Figure 8-38 Load Transient
LM61480-Q1 LM61495-Q1 LM62460-Q1 Load Transient
VOUT = 5 V FSW = 400 kHz Auto mode
IOUT = 5 A to 10 A to 5 A VIN = 13.5 V TR = TF = 1 µs
Figure 8-40 Load Transient
LM61480-Q1 LM61495-Q1 LM62460-Q1 Load Transient
VOUT = 3.3 V FSW = 400 kHz Auto mode
IOUT = 5 A to 10 A to 5 A VIN = 13.5 V TR = TF = 1 µs
Figure 8-42 Load Transient
LM61480-Q1 LM61495-Q1 LM62460-Q1 Load Transient
VOUT = 5 V FSW = 2200 kHz Auto mode
IOUT = 2 A to 4 A to 2 A VIN = 13.5 V TR = TF = 1 µs
Figure 8-44 Load Transient
LM61480-Q1 LM61495-Q1 LM62460-Q1 Conducted EMI versus CISPR25 Class 5 Limits (Green: Peak Signal, Blue: Average Signal)
VOUT = 5 V FSW = 400 kHz IOUT = 10 A
Frequency Tested: 150 kHz to 30 MHz
Figure 8-46 Conducted EMI versus CISPR25 Class 5 Limits (Green: Peak Signal, Blue: Average Signal)
LM61480-Q1 LM61495-Q1 LM62460-Q1 Radiated EMI Bicon Vertical versus CISPR25 Class 5 Limits
VOUT = 5 V FSW = 400 kHz IOUT = 10 A
Frequency Tested: 30 MHz to 300 MHz
Figure 8-48 Radiated EMI Bicon Vertical versus CISPR25 Class 5 Limits
LM61480-Q1 LM61495-Q1 LM62460-Q1 Radiated EMI Log Vertical versus CISPR25 Class 5 Limits
VOUT = 5 V FSW = 400 kHz IOUT = 10 A
Frequency Tested: 300 MHz to 1 GHz
Figure 8-50 Radiated EMI Log Vertical versus CISPR25 Class 5 Limits
LM61480-Q1 LM61495-Q1 LM62460-Q1 Conducted EMI versus CISPR25 Class 5 Limits (Green: Peak Signal, Blue: Average Signal)
VOUT = 5 V FSW = 2.2 MHz IOUT = 4 A
Frequency Tested: 150 kHz to 30 MHz
Figure 8-52 Conducted EMI versus CISPR25 Class 5 Limits (Green: Peak Signal, Blue: Average Signal)
LM61480-Q1 LM61495-Q1 LM62460-Q1 Radiated EMI Bicon Vertical versus CISPR25 Class 5 Limits
VOUT = 5 V FSW = 2.2 MHz IOUT = 4 A
Frequency Tested: 30 MHz to 300 MHz
Figure 8-54 Radiated EMI Bicon Vertical versus CISPR25 Class 5 Limits
LM61480-Q1 LM61495-Q1 LM62460-Q1 Radiated EMI Log Vertical versus CISPR25 Class 5 Limits
VOUT = 5 V FSW = 2.2 MHz IOUT = 4 A
Frequency Tested: 300 MHz to 1 GHz
Figure 8-56 Radiated EMI Log Vertical versus CISPR25 Class 5 Limits
Table 8-4 BOM for Typical Application Curves
VOUT FREQUENCY RFBB COUT CIN + CHF L CFF
3.3 V 400 kHz 43.2 kΩ 4 × 47 µF + 100 µF electrolytic + 2 × 2.2 µF 4 × 10 µF + 2 × 470 nF + 100 µF electrolytic 2.4 µH (744325240) 22 pF
3.3 V 2200 kHz 43.2 kΩ 2 × 47 µF + 100 µF electrolytic + 2 × 2.2 µF 2 × 10 µF + 2 × 470 nF + 100 µF electrolytic 0.68 µH (744373460068) 10 pF
5 V 400 kHz 24.9 kΩ 4 × 47 µF + 100 µF electrolytic + 2 × 2.2 µF 4 × 10 µF + 2 × 470 nF + 100 µF electrolytic 2.4 µH (744325240) 22 pF
5 V 2200 kHz 24.9 kΩ 2 × 47 µF + 100 µF electrolytic + 2 × 2.2 µF 2 × 10 µF + 2 × 470 nF + 100 µF electrolytic 0.68 µH (744373460068) 10 pF