SLVAFP0 December   2023 LMR51610

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Specifications
    1. 2.1 Input Voltage Range
    2. 2.2 Output Current Range
  6. 3External Component Selection
    1. 3.1 Duty Cycle Calculation
    2. 3.2 Output Voltage Calculation
    3. 3.3 Inductor Selection
    4. 3.4 Input and Output Capacitor
    5. 3.5 Enable Level Shift
    6. 3.6 Output Clamp Diode
  7. 4Evaluation Results
    1. 4.1 Typical Performance
    2. 4.2 Loop Response Bench Verification
  8. 5Conclusion
  9. 6References
  10. 7LMR50410 Design Example
    1. 7.1 LMR50410 Output Current Range
    2. 7.2 LMR50410 Efficiency

Typical Performance

Figure 7-17 to Figure 4-13 show the experimental test results of the Figure 3-3 design. Unless otherwise specified, the following conditions apply: VIN = 24 V, VO = -12 V, IO = 0.4 A, TA = 25 °C.

GUID-20230907-SS0I-TJN8-MSDD-BRTHB0W29PLT-low.svgFigure 4-1 Efficiency vs Load Current Vout=-5 V
GUID-20230907-SS0I-XVB6-XRG6-2BXP3VWQ6TGK-low.svgFigure 4-3 Line Regulation Vout=-5 V
GUID-20230907-SS0I-MNTG-XGT7-SL8SDGMZSCFQ-low.svgFigure 4-5 Load Regulation Vout=-5 V
GUID-20230905-SS0I-X4MN-P9ZC-FHG6GHZQLT8H-low.pngFigure 4-7 Output Voltage Ripple at no Load
GUID-20230904-SS0I-4CDD-K111-Q6RCZC4CDVRV-low.pngFigure 4-9 Steady States at Light Load 100 mA
GUID-20230905-SS0I-R3K6-XHWC-PGLS0SB0FSZL-low.pngFigure 4-11 Start Up by Vin 500mA Load
GUID-20230906-SS0I-29HL-VVZS-TDDCKHRS5KJP-low.pngFigure 4-13 Over Current Protection
GUID-20230907-SS0I-7P24-PDLW-W0TH35VL31PZ-low.svgFigure 4-2 Efficiency vs Load Current Vout=-12 V
GUID-20230907-SS0I-TF4Q-MWL7-BDWCSHR36CLW-low.svgFigure 4-4 Line Regulation Vout=-12 V
GUID-20230907-SS0I-DX6L-GL9N-HSQFVWVNCD5J-low.svgFigure 4-6 Load Regulation Vout=-12 V
GUID-20230904-SS0I-TTQV-KJCN-SVWB0VDHNQGR-low.pngFigure 4-8 Steady States at Full Load 500mA
GUID-20230906-SS0I-ZFRV-ZGMX-M0MLFXQ29H7T-low.pngFigure 4-10 Start Up by Vin no Load
GUID-20230906-SS0I-NMMH-NLXT-BQNFXGQLHRJP-low.pngFigure 4-12 Load Transient 100mA to 500mA