SNVSBI9 October   2019 LMR33610

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
    1.     Device Images
      1.      Simplified Schematic
      2.      Efficiency vs Output Current VOUT = 5 V, 400 kHz
  4. Revision History
  5. Device Comparison Table
  6. Pin Configuration and Functions
    1.     Pin Functions
  7. Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Characteristics
    7. 7.7 System Characteristics
    8. 7.8 Typical Characteristics
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Power-Good Flag Output
      2. 8.3.2 Enable and Start-up
      3. 8.3.3 Current Limit and Short Circuit
      4. 8.3.4 Undervoltage Lockout and Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Auto Mode
      2. 8.4.2 Dropout
      3. 8.4.3 Minimum Switch On-Time
  9. Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1  Custom Design With WEBENCH® Tools
        2. 9.2.2.2  Choosing the Switching Frequency
        3. 9.2.2.3  Setting the Output Voltage
        4. 9.2.2.4  Inductor Selection
        5. 9.2.2.5  Output Capacitor Selection
        6. 9.2.2.6  Input Capacitor Selection
        7. 9.2.2.7  CBOOT
        8. 9.2.2.8  VCC
        9. 9.2.2.9  CFF Selection
        10. 9.2.2.10 External UVLO
        11. 9.2.2.11 Maximum Ambient Temperature
      3. 9.2.3 Application Curves
    3. 9.3 What to Do and What Not to Do
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 Ground and Thermal Considerations
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Development Support
        1. 12.1.1.1 Custom Design With WEBENCH® Tools
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Receiving Notification of Documentation Updates
    4. 12.4 Support Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

Application Curves

Unless otherwise specified the following conditions apply: VIN = 12 V, TA = 25°C. Figure 36 shows the circuit with the appropriate BOM from Table 3.

LMR33610 eff_5v_400k_soic.gif
VOUT = 5 V 400 kHz DDA Package
Figure 22. Efficiency
LMR33610 eff_5v_1p4m_soic.gif
VOUT = 5 V 1.4 MHz DDA Package
Figure 24. Efficiency
LMR33610 line_load_5V.gif
VOUT = 5 V
Figure 26. Line and Load Regulation
LMR33610 Isupply_5v_2A_SNVSAW1.png
VOUT = 5 V IOUT = 0 A RFBT = 1 MΩ
Figure 28. Input Supply Current
LMR33610 mode_5v_SNVSAW1.png
VOUT = 5 V ƒSW = 400 kHz
Figure 30. Mode Change Thresholds
LMR33610 typ_load_transient_5V_0to1A.gif
VIN = 12 V VOUT = 5 V
tf = tr = 2 µs IOUT = 0 A to 1 A
Figure 32. Load Transient
LMR33610 typ_load_transient_5V_0-5to1A.gif
VIN = 12 V VOUT = 5 V
tf = tr = 2 µs IOUT = 0.5 A to 1 A
Figure 34. Load Transient
LMR33610 eff_3p3v_400k_soic.gif
VOUT = 3.3 V 400 kHz DDA Package
Figure 23. Efficiency
LMR33610 eff_3p3v_1p4m_soic.gif
VOUT = 3.3 V 1.4 MHz DDA Package
Figure 25. Efficiency
LMR33610 line_load_3V3.gif
VOUT = 3.3 V
Figure 27. Line and Load Regulation
LMR33610 Isupply_3p3v_2A_SNVSAW1.png
VOUT = 3.3 V IOUT = 0 A RFBT = 1 MΩ
Figure 29. Input Supply Current
LMR33610 mode_3p3v_SNVSAW1.png
VOUT = 3.3 V ƒSW = 400 kHz
Figure 31. Mode Change Thresholds
LMR33610 typ_load_transient_3-3V_0to1A.gif
VIN = 12 V VOUT = 3.3 V
tf = tr = 2 µs IOUT = 0 A to 1 A
Figure 33. Load Transient
LMR33610 typ_load_transient_3-3V_0-5to1A.gif
VIN = 12 V VOUT = 3.3 V
tf = tr = 2 µs IOUT = 0.5 A to 1 A
Figure 35. Load Transient
LMR33610 typ_app_char_cir5.gifFigure 36. Circuit for Application Curves

Table 3. BOM for Typical Application Curves DDA Package(1)

VOUT FREQUENCY RFBB COUT CIN + CHF L U1
3.3 V 400 kHz 43.3 kΩ 4 × 22 µF 1 × 10 µF + 1 × 220 nF 6.8 µH, 14 mΩ LMR33610ADDA
3.3 V 1400 KHz 43.3 kΩ 4 × 22 µF 1 × 10 µF + 1 × 220 nF 2.2 µH, 11.4 mΩ LMR33610BDDA
5 V 400 kHz 24.9 kΩ 4 × 22 µF 1 × 10 µF + 1 × 220 nF 8.2 µH, 14 mΩ LMR33610ADDA
5 V 1400 KHz 24.9 kΩ 4 × 22 µF 1 × 10 µF + 1 × 220 nF 2.2 µH, 11.4 mΩ LMR33610BDDA
The values in this table were selected to enhance certain performance criteria and may not represent typical values.