SNVU738 March   2022 LM5157 , LM5157-Q1 , LM51571-Q1

 

  1.   Trademarks
  2. 1Features and Electrical Performance
    1. 1.1 Electrical Parameters
    2. 1.2 EVM Power Derating Curve
    3. 1.3 Terminals and Signal Test Points
  3. 2Application Schematic
  4. 3EVM Picture
  5. 4Test Setup and Procedure
    1. 4.1 Bench Setup
    2. 4.2 Test Equipment
    3. 4.3 Precautions
  6. 5Test Data
    1. 5.1 Efficiency
    2. 5.2 Output Regulation
    3. 5.3 Thermal Performance
    4. 5.4 Typical Power Up
    5. 5.5 Output Ripple Voltage
    6. 5.6 Step Load Response
    7. 5.7 Bode Plots
  7. 6Schematics
  8. 7Bill of Materials
  9. 8Board Layout

1.1 Electrical Parameters

Refer to the LM5157 data sheet for the full range of recommended operating specifications and design guidelines. Section 1.1 provides a summary of the tested LM5157EVM-SEPIC performance specifications.
Table 1-1 Electrical Performance
Parameter Test Conditions MIN TYP MAX UNIT
INPUT CHARACTERISTICS
Input voltage Range VIN Normal operation, 1 A full load 6 12 32 V
Power derating from 1 A down to 0.5 A 4 6 V
Input voltage turn on VIN(ON) Adjusted by the UVLO/SYNC resistors 3.9 V
Input voltage turn off VIN(OFF) 3.7 V
OUTPUT CHARACTERISTICS
Output Voltage VOUT 12 V
Maximum Output Current IOUT VIN > 6 V 1 A
4 V < VIN < 6 V 0.5 1 A
SYSTEM CHARACTERISTICS
Switching Frequency

2.1

 MHz
Full Load Efficiency VIN = 12 V, IOUT = 1 A 92 %
Ambient Temperature, TA -40 125 °C