TIDT445 May   2025

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 Load Transient Test Circuit
    3. 2.3 Highlighted Products
      1. 2.3.1 LM5137F-Q1 Overview
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
    2. 3.2 Test Setup
    3. 3.3 Test Results
      1. 3.3.1 Efficiency Data
      2. 3.3.2 Efficiency Graphs
      3. 3.3.3 Output Voltage Ripple
      4. 3.3.4 Thermal Images
      5. 3.3.5 Bode Plots
      6. 3.3.6 Load Transients
  10. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
      3. 4.1.3 Altium Project
      4. 4.1.4 Gerber Files
      5. 4.1.5 Assembly Drawings
    2. 4.2 Documentation Support
    3. 4.3 Support Resources
    4. 4.4 Trademarks
  11. 5About the Author

Efficiency Data

Efficiency data is shown in Table 3-1. Test condition is room temperature, no air flow.

Table 3-1 Efficiency at 8Vin

VIIN

IIN

VOUT

IOUT

Efficiency

7.9565

0.010052

4.481

0.01547

86.67%

7.9179

0.01965

4.481

0.03043

87.64%

7.879

0.029348

4.481

0.04542

88.02%

7.8404

0.0391

4.481

0.06043

88.33%

7.7633

0.0588

4.481

0.0904

88.74%

7.6102

0.099

4.48

0.1503

89.37%

7.5003

0.13206

4.479

0.1997

90.30%

7.9864

0.1847

4.49

0.3001

91.35%

7.9834

0.3036

4.489

0.4997

92.55%

7.9775

0.4833

4.489

0.801

93.26%

7.9745

0.6

4.489

0.998

93.63%

7.9688

0.9

4.489

1.4981

93.77%

7.9618

1.1908

4.489

1.9913

94.28%

7.9475

1.7955

4.489

2.9963

94.26%

7.9335

2.3682

4.489

3.9853

95.22%

7.9192

2.9464

4.489

4.9894

95.99%

7.9039

3.5341

4.489

5.9925

96.30%

7.8893

4.117

4.489

6.9816

96.49%

7.8746

4.7122

4.489

7.9856

96.61%

7.8607

5.3092

4.489

8.9906

96.70%

7.8464

5.8986

4.489

9.9769

96.77%

7.8168

7.103

4.489

11.989

96.93%

7.7848

8.315

4.489

13.981

96.96%

7.755

9.541

4.489

15.978

96.94%

7.7244

10.79

4.489

17.983

96.86%

7.6942

12.049

4.489

19.981

96.75%

7.663

13.323

4.489

21.974

96.62%

7.6303

14.634

4.489

23.983

96.42%

7.5632

17.275

4.489

27.973

96.11%

7.8245

17.942

4.489

29.977

95.85%

7.8

20.482

4.489

33.96

95.42%

7.7872

21.78

4.489

35.973

95.21%

7.7743

23.079

4.489

37.962

94.98%

7.7615

24.395

4.489

39.955

94.73%

Table 3-2 Efficiency at 13.5Vin

VIIN

IIN

VOUT

IOUT

Efficiency

13.481

0.006335

4.481

0.01545

81.07%

13.466

0.012255

4.481

0.03042

82.60%

13.451

0.01819

4.481

0.04542

83.18%

13.436

0.024105

4.48

0.06042

83.58%

13.406

0.035857

4.48

0.0904

84.25%

13.347

0.05886

4.479

0.1501

85.58%

13.297

0.07837

4.486

0.1997

85.97%

13.427

0.112

4.482

0.3002

89.47%

13.48

0.182

4.481

0.4997

91.27%

13.478

0.29

4.481

0.801

91.83%

13.476

0.359

4.487

0.99

91.82%

13.471

0.542

4.489

1.4981

92.11%

13.467

0.7181

4.489

1.9931

92.52%

13.458

1.075

4.489

2.9953

92.94%

13.45

1.4251

4.489

3.9844

93.31%

13.442

1.7731

4.489

4.9903

93.99%

13.433

2.1507

4.489

5.9934

93.13%

13.425

2.4989

4.489

6.9816

93.42%

13.415

2.8796

4.489

7.9856

92.80%

13.406

3.2636

4.489

8.9916

92.26%

13.398

3.6189

4.489

9.9788

92.39%

13.379

4.3526

4.489

11.989

92.42%

13.362

5.067

4.489

13.983

92.71%

13.346

5.7146

4.489

15.978

94.04%

13.331

6.384

4.489

17.987

94.88%

13.315

7.054

4.489

19.981

95.50%

13.297

7.77

4.489

21.974

95.47%

13.278

8.497

4.489

23.983

95.42%

13.243

9.952

4.489

27.973

95.28%

13.226

10.695

4.489

29.981

95.15%

13.189

12.185

4.489

33.965

94.87%

13.17

12.947

4.489

35.973

94.70%

13.151

13.709

4.489

37.966

94.53%

13.131

14.509

4.489

39.955

94.14%

Table 3-3 Efficiency at 18Vin

VIIN

IIN

VOUT

IOUT

Efficiency

17.996

0.0052

4.481

0.01543

73.89%

17.993

0.0099

4.481

0.0304

76.47%

17.99

0.0145

4.481

0.04538

77.95%

17.988

0.0193

4.48

0.06039

77.93%

17.982

0.0286

4.48

0.0903

78.66%

17.972

0.0466

4.479

0.1503

80.38%

17.962

0.0624

4.486

0.1997

79.93%

17.946

0.0893

4.485

0.3001

83.99%

17.914

0.1434

4.485

0.4996

87.23%

17.982

0.2224

4.491

0.7922

88.96%

17.98

0.275

4.491

0.9891

89.84%

17.977

0.4131

4.491

1.4981

90.60%

17.974

0.54769

4.491

1.9913

90.84%

17.968

0.8164

4.491

2.9963

91.73%

17.961

1.0901

4.491

3.9834

91.37%

17.955

1.3567

4.489

4.9903

91.96%

17.948

1.6283

4.489

5.9944

92.08%

17.941

1.8904

4.488

6.9823

92.40%

17.934

2.1932

4.488

7.9866

91.13%

17.927

2.472

4.488

8.9925

91.07%

17.921

2.7419

4.488

9.9816

91.17%

17.907

3.289

4.488

11.99

91.37%

17.893

3.8283

4.488

13.983

91.61%

17.882

4.331

4.488

15.978

92.59%

17.869

4.832

4.488

17.985

93.48%

17.854

5.31

4.488

19.98

94.58%

17.841

5.8332

4.487

21.974

94.74%

17.828

6.3804

4.487

23.984

94.61%

17.801

7.461

4.487

27.973

94.50%

17.788

8.012

4.487

29.981

94.39%

17.762

9.113

4.487

33.963

94.15%

17.748

9.676

4.487

35.973

93.99%

17.734

10.238

4.487

37.966

93.83%

17.72

10.805

4.487

39.955

93.64%