SNVSCM5 January   2024 LMR43606-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 System Characteristics
    7. 6.7 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  Enable, Start-Up, and Shutdown
      2. 7.3.2  External CLK SYNC (With MODE/SYNC)
        1. 7.3.2.1 Pulse-Dependent MODE/SYNC Pin Control
      3. 7.3.3  Adjustable Switching Frequency (with RT)
      4. 7.3.4  Power-Good Output Operation
      5. 7.3.5  Internal LDO, VCC, and VOUT/FB Input
      6. 7.3.6  Bootstrap Voltage and VBOOT-UVLO (BOOT Terminal)
      7. 7.3.7  Output Voltage Selection
      8. 7.3.8  Spread Spectrum
      9. 7.3.9  Soft Start and Recovery from Dropout
        1. 7.3.9.1 Recovery from Dropout
      10. 7.3.10 Current Limit and Short Circuit
      11. 7.3.11 Thermal Shutdown
      12. 7.3.12 Input Supply Current
    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 CCM Mode
        2. 7.4.3.2 Auto Mode – Light-Load Operation
          1. 7.4.3.2.1 Diode Emulation
          2. 7.4.3.2.2 Frequency Reduction
        3. 7.4.3.3 FPWM Mode – Light-Load Operation
        4. 7.4.3.4 Minimum On-Time (High Input Voltage) Operation
        5. 7.4.3.5 Dropout
  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
          1. 8.2.2.2.1 FB for Adjustable Output
        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  CBOOT
        7. 8.2.2.7  VCC
        8. 8.2.2.8  CFF Selection
        9. 8.2.2.9  External UVLO
        10. 8.2.2.10 Maximum Ambient Temperature
      3. 8.2.3 Application Curves
    3. 8.3 Best Design Practices
    4. 8.4 Power Supply Recommendations
    5. 8.5 Layout
      1. 8.5.1 Layout Guidelines
        1. 8.5.1.1 Ground and Thermal Considerations
      2. 8.5.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
      2. 9.1.2 Device Nomenclature
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 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: VIN = 12V, TA = 25°C.

GUID-20231221-SS0I-9FCD-XLPL-HTFWZDFBWMXT-low.svg
LMR43606MSC3 VOUT = 3.3V 2.2MHz (AUTO)
Fixed
Figure 8-3 Efficiency
GUID-20231221-SS0I-TLNH-9517-FXNJPJBJJ7BN-low.svg
LMR43606MSC5 VOUT = 5V 2.2MHz (AUTO)
Fixed
Figure 8-5 Efficiency
GUID-20231221-SS0I-VNL0-6FCZ-FCF72KRLQFPL-low.svg
LMR43606RS3 VOUT = 3.3V 400kHz (AUTO)
Fixed
Figure 8-7 Efficiency
GUID-20231221-SS0I-BKVP-QR9X-RLWW4QP694ZD-low.svg
LMR43606RS5 VOUT = 5V 400kHz (AUTO)
Fixed
Figure 8-9 Efficiency
GUID-20231221-SS0I-GTDJ-TQF2-D2HLRL67B9J7-low.svg
LMR43606MSC3 VOUT = 3.3V 2.2MHz (AUTO)
Fixed
Figure 8-11 Line and Load Regulation
GUID-20240105-SS0I-63BL-BDZC-1FMRDTLWMHC0-low.svg
LMR43606MSC3 VOUT = 3.3V 2.2MHz (AUTO)
Fixed
Figure 8-13 Input Current vs. Load Current
GUID-20240105-SS0I-VM1N-FP18-QP2ZXG9JLFNZ-low.svg
LMR43606MSC3 VOUT = 3.3V fixed 2.2MHz (AUTO)
Figure 8-15 Start Up
GUID-20240106-SS0I-Q1HH-VDVK-RK53NM6J4V1W-low.svg
LMR43606MSC3 VOUT = 3.3V 2.2MHz (AUTO)
Fixed
Figure 8-17 Dropout
GUID-20240110-SS0I-K7M7-BBW8-LFMLX6F005NH-low.svg
VIN = 13.5V VOUT = 3.3V fSW = 2.2MHz
Fixed Load = 0.6A
Figure 8-19 Typical CISPR 25 Conducted EMI 150kHz – 30MHz Purple: Peak Detect, Green: Average Detect
GUID-20240110-SS0I-HW0D-VDJH-LBZQTLF27SLD-low.svg
VIN = 13.5V VOUT = 3.3V fSW = 2.2MHz
Fixed Load = 0.6A
Figure 8-21 Typical CISPR 25 Radiated EMI 150kHz – 30MHz Rod Antenna Red: Peak Detect, Green: Average Detect
GUID-20240110-SS0I-DC7Q-VJNC-KHRXQBF5TWD1-low.svg
VIN = 13.5V VOUT = 3.3V fSW = 2.2MHz
Fixed Load = 0.6A
Figure 8-23 Typical CISPR 25 Radiated EMI 30MHz – 230MHz Horizontal Bicon Antenna Red: Peak Detect, Green: Average Detect
GUID-20240110-SS0I-8F1Z-7ZTV-G59JDKWGD0MC-low.svg
VIN = 13.5V VOUT = 3.3V fSW = 2.2MHz
Fixed Load = 0.6A
Figure 8-25 Typical CISPR 25 Radiated EMI 300MHz – 1GHz Horizontal Log Antenna Red: Peak Detect, Green: Average Detect
GUID-20231221-SS0I-Z8D3-3C5M-3X6NS4HXNZ6D-low.svg
LMR43606MSC3 VOUT = 3.3V 2.2MHz (FPWM)
Fixed
Figure 8-4 Efficiency
GUID-20231221-SS0I-HVP1-VVXN-HTDGHKQ5Q5ZC-low.svg
LMR43606MSC5 VOUT = 5V 2.2MHz (FPWM)
Fixed
Figure 8-6 Efficiency
GUID-20231221-SS0I-NBPS-2BCX-QRTD4HZ3JJFP-low.svg
LMR43606MSC3 VOUT = 3.3V 400kHz (FPWM)
Fixed
Figure 8-8 Efficiency
GUID-20231221-SS0I-HPC4-C16R-CNJ46VQKKSKF-low.svg
LMR43606MSC5 VOUT = 5V 400kHz (FPWM)
Fixed
Figure 8-10 Efficiency
GUID-20231221-SS0I-QQTJ-P3W9-NXSDV0GBR2CW-low.svg
LMR43606MSC3 VOUT = 3.3V 400kHz (AUTO)
Fixed
Figure 8-12 Line and Load Regulation
GUID-20240105-SS0I-C2LC-SBP0-RF43N0CKZTZ5-low.svg
LMR43606MSC3 VOUT = 3.3V 2.2MHz (AUTO)
Fixed
Figure 8-14 No Load Output Voltage Ripple
GUID-20240106-SS0I-1GD2-QSQK-2FPKGD8HHXXZ-low.svg
LMR43606MSC3 VOUT = 3.3V 12VIN, 600mA, 2.2MHz (AUTO)
Fixed 3.3 VOUT
Figure 8-16 EVM Thermal Performance
GUID-20240106-SS0I-NZZJ-9LRL-97MHRP9WCZ12-low.svg
LMR43606MSC3 VOUT = 3.3V 2.2MHz (FPWM)
60 mA to 600mA,1A/µs Fixed
Figure 8-18 Load Transient
GUID-20240110-SS0I-ZBQ3-LM8C-0SRVLXQX8KV2-low.svg
VIN = 13.5V VOUT = 3.3V fSW = 2.2MHz
Fixed Load = 0.6A
Figure 8-20 Typical CISPR 25 Conducted EMI 30MHz – 108MHz Purple: Peak Detect, Green: Average Detect
GUID-20240110-SS0I-8FQD-PLWH-QFFXLMQSXZTZ-low.svg
VIN = 13.5V VOUT = 3.3V fSW = 2.2MHz
Fixed Load = 0.6A
Figure 8-22 Typical CISPR 25 Radiated EMI 30MHz – 230MHz Vertical Bicon Antenna Red: Peak Detect, Green: Average Detect
GUID-20240110-SS0I-XDZ2-RKS4-XZG5PSX9MGGD-low.svg
VIN = 13.5V VOUT = 3.3V fSW = 2.2MHz
Fixed Load = 0.6A
Figure 8-24 Typical CISPR 25 Radiated EMI 300MHz – 1GHz Vertical Log Antenna Red: Peak Detect, Green: Average Detect
GUID-20240110-SS0I-TMW2-LH2J-KB7NMK8QBN7J-low.svg
Ferrite Bead Part Number: FBMH3225HM601NT Alternate Ferrite Bead Part Number: FBMH3225HM102N
Figure 8-26 Typical Input EMI Filter
GUID-20240105-SS0I-B3CT-FQKK-SSNMDHHDNMR0-low.svg
A. The RT pin is factory-set for externally adjustable switching frequency RT variants only. Tying this pin to GND results in 2.2MHz switching frequency. See Section 7.3.3 for details.
B. The MODE/SYNC pin is factory-set for fixed frequency MODE/SYNC variants only. Tying this pin to GND results in auto mode. See Section 7.3.2 for details.
Figure 8-27 Example Application Circuit
Table 8-5 BOM for Typical Application Curves
U1ƒSWVOUTLNOMINAL COUT
(RATED CAPACITANCE)		RFBTRFBBCFF
LMR43606MSC3RPERQ12200kHz3.3V Fixed5.6µH, 31mΩ2 × 22µF0ΩDNPDNP