SNVSBQ5 June   2021 LMR33620AP-Q1 , LMR33630AP-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 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. 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. 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 Third-Party Products Disclaimer
      2. 12.1.2 Development Support
        1. 12.1.2.1 Custom Design With WEBENCH® Tools
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Support Resources
    4. 12.4 Receiving Notification of Documentation Updates
    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

9.2.3 Application Curves

Unless otherwise specified the following conditions apply: VIN = 12 V, TA = 25°C. The circuit is shown in Figure 9-27, with the appropriate BOM from Table 9-3.

GUID-3DBDF0DC-8D19-4A4C-82DD-D2D5427A5D3D-low.png
VOUT = 5 V400 kHzRNX Package
Figure 9-5 Efficiency
GUID-BF61055C-9345-447A-8040-B2432FA14F21-low.png
VOUT = 5 V2.1 MHzRNX Package
Figure 9-7 Efficiency
GUID-04577FEA-28B0-41C7-A9AA-E1B15F8F5A84-low.png
VOUT = 5 V
Figure 9-9 Line and Load Regulation
GUID-FDF6C584-259E-4CD3-A481-4C59DD289DE9-low.png
VOUT = 5 VƒSW = 400 kHz
Figure 9-11 Mode Change Thresholds
GUID-207E469E-4E11-4137-96D9-FE869018A778-low.gif
VIN = 12 VVOUT = 5 V
tf = tr = 2 µsIOUT = 0 A to 3 A
Figure 9-13 Load Transient
GUID-F258577F-3A81-4673-A800-D8D01D4F40DF-low.png
VOUT = 3.3 V
Figure 9-15 Line and Load Regulation
GUID-DB95C7C1-FC0C-40AD-83F4-9CC43B21FA8B-low.png
VOUT = 3.3 VƒSW = 400 kHz
Figure 9-17 Mode Change Thresholds
GUID-2B8B1C19-9B4C-48E6-93AE-DFF8874DDBCD-low.gif
VIN = 12 VVOUT = 3.3 V
tf = tr = 2 µsIOUT = 0 A to 3 A
Figure 9-19 Load Transient
GUID-FC27320A-7539-43B2-890B-A461A90450C6-low.gif
VIN = 12 VVOUT = 5 VIOUT = 3 A
ƒSW = 400 kHzRNX package
Figure 9-21 Conducted EMI
GUID-22F0BE31-316B-4A3E-B88E-19FC31A8ADA7-low.gif
VIN = 12 VVOUT = 5 VIOUT = 3 A
ƒSW = 400 kHzRNX package
Figure 9-23 Radiated EMI Biconical Antenna (Vertical)
GUID-5B92CE7A-CE77-4523-A802-3375AB49CE77-low.gif
VIN = 12 VVOUT = 5 VIOUT = 3 A
ƒSW = 400 kHzRNX package
Figure 9-25 Radiated EMI Log-periodic Antenna (Vertical)
GUID-4D788854-7727-4600-8817-723F1A192A3D-low.png
VOUT = 3.3 V400 kHzRNX Package
Figure 9-6 Efficiency
GUID-FDA2A1C0-9FD1-45E7-A5E5-F980F7225456-low.png
VOUT = 3.3 V2.1 MHzRNX Package
Figure 9-8 Efficiency
GUID-35A2D42E-D0CA-4C95-B4C6-D5BC191B30D5-low.png
VOUT = 5 VIOUT = 0 ARFBT = 1 MΩ
Figure 9-10 Input Supply Current
GUID-7E86A77D-986D-4B4B-A0E9-A8AA3D77B518-low.png
VOUT = 5 VƒSW = 2100 kHz
Figure 9-12 Switching Frequency vs Output Current
GUID-5EE8209B-7100-4687-AFA7-062C28C2BEDB-low.gif
VIN = 12 VVOUT = 5 V
tf = tr = 2 µsIOUT = 1 A to 3 A
Figure 9-14 Load Transient
GUID-EFB51A4F-F683-4763-8D4D-55B18476EB05-low.png
VOUT = 3.3 VIOUT = 0 ARFBT = 1 MΩ
Figure 9-16 Input Supply Current
GUID-630300F5-76CA-4F17-AB5D-927E0F410EC8-low.png
VOUT = 3.3 V ƒSW = 2100 kHz
Figure 9-18 Switching Frequency vs Output Current
GUID-B831DB89-2418-411E-900A-9AE4C9E9C7ED-low.gif
VIN = 12 VVOUT = 3.3VIOUT = 1 A to 3 A
tf = tr = 2 µs
Figure 9-20 Load Transient
GUID-66F263D6-849C-4808-85AC-2D1BC1D40BE9-low.gif
VIN = 12 VVOUT = 5 VIOUT = 3 A
ƒSW = 400 kHzRNX package
Figure 9-22 Radiated EMI Biconical Antenna (Horizontal)
GUID-3896DFA7-7A79-492C-B6FC-0721771AF7F0-low.gif
VIN = 12 VVOUT = 5 VIOUT = 3 A
ƒSW = 400 kHzRNX package
Figure 9-24 Radiated EMI Log-Periodic Antenna (Horizontal)
GUID-A93F1F79-0E0D-4333-A367-576126CA468E-low.gif
VIN = 12 VVOUT = 5 VIOUT = 3 A
ƒSW = 400 kHzRNX package
Figure 9-26 Radiated EMI
Rod Antenna
GUID-62DF9C73-09B0-4682-88E6-26F0455886D5-low.gifFigure 9-27 Circuit for Application Curves
Table 9-3 BOM for Typical Application Curves RNX Package(1)
VOUTFREQUENCYRFBBCOUTCIN + CHFLU1
3.3 V400 kHz43.3 kΩ4 × 22 µF2 × 4.7 µF + 2 × 100 nF6.8 µH, 14 mΩLMR33630ARNX
3.3 V2100 kHz43.3 kΩ4 × 22 µF2 × 4.7 µF + 2 × 100 nF1.2 µH, 7 mΩLMR33630CRNX
5 V400 kHz24.9 kΩ4 × 22 µF2 × 4.7 µF + 2 × 100 nF8 µH, 25 mΩLMR33630ARNX
5 V2100 kHz24.9 kΩ4 × 22 µF2 × 4.7 µF + 2 × 100 nF1.5 µH, 8.2 mΩLMR33630CRNX
(1) The values in this table were selected to enhance certain performance criteria and may not represent typical values.
GUID-8DE3335C-240F-4594-8EAF-B4A052336D04-low.gifFigure 9-28 Typical Input EMI Filter
Filter Used Only for EMI Measurements Found in Application Curves