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

1.1 Key System Specifications

Table 1-1 Key System Specifications

PARAMETER

TEST CONDITIONS

MIN

NOM

MAX

UNIT

INPUT CONDITIONS

Input voltage

/

6.5

13.5

36

Volt

Input current

/

14

26

Amper

OUTPUT CONDITIONS

Output voltage

/

4.5

Volt

Output current

/

0

42

Amper

Output voltage ripple

Full range Vin , full range load

40

mV

Output power

/

200

Watt

SYSTEM CHARACTERISTICS

Efficiency (η)

Vin = 13.5V, Vout= 4.5V, Iout = 15mA

81.1

%
Vin = 13.5V, Vout = 4.5V, Iout = 21A

95.5

%

Vin = 13.5V, Vout = 4.5V, Iout = 40A

94.1

%

Operating ambient

Open frame

-25

25

85

°C

Switching frequency

400

kHz

Load transient

21A-42A-56A-83A-21A, 1μs slew time1

12 × 47μF/1210 output caps

-5.5

+5.5

%

21A-83A-56A-42A-21A, 1μs slew time2

12 × 47μF/1210 output caps

-8.3

+8.3

%

Board form factor

FR4 material, 6-layer, 2-oz copper

126 × 87 × 35

mm
PMP41158 Load Transient 21A, 42A, 56A, 83A, 21A Waveforms Figure 1-1 Load Transient 21A, 42A, 56A, 83A, 21A Waveforms
PMP41158 Load Transient 21A, 83A, 56A, 42A, 21A Waveforms Figure 1-2 Load Transient 21A, 83A, 56A, 42A, 21A Waveforms