SNVU628 February   2020 LM5155 , LM5155-Q1 , LM51551 , LM51551-Q1

 

  1.   LM5155EVM-SEPIC User's Guide
    1.     Trademarks
    2. 1 Features and Electrical Performance
      1. 1.1 Electrical Parameters
      2. 1.2 EVM Power Derating Curve
      3. 1.3 Terminals and Signal Test Points
    3. 2 Application Schematic
    4. 3 EVM Picture
    5. 4 Test Setup and Procedure
      1. 4.1 Bench Setup
      2. 4.2 Test Equipment
      3. 4.3 Precautions
    6. 5 Test Data
      1. 5.1 Efficiency
      2. 5.2 Output Regulation
      3. 5.3 Typical Power Up
      4. 5.4 Output Ripple Voltage
      5. 5.5 Coupled Inductor Currents
      6. 5.6 Dynamic DIR Change
      7. 5.7 Step Load Response
      8. 5.8 Bode Plots
      9. 5.9 Overloading Hiccup Mode
    7. 6 Design Files
      1. 6.1 Schematics
      2. 6.2 Bill of Materials
      3. 6.3 Board Layout

1.1 Electrical Parameters

Table 1. Electrical Performance

Parameter Test Conditions MIN TYP MAX UNIT
INPUT CHARACTERISTICS
Input voltage Range VIN Normal operation, 2 A full load 6 12 18 V
Maximum transient voltage, 2 A full load 5 42 V
Power derating from 2 A down to 0.8 A 3 5 V
Input voltage turn on VIN(ON) Adjusted by the UVLO/SYNC resistors 2.9 V
Input voltage turn off VIN(OFF) 2.8 V
OUTPUT CHARACTERISTICS
Output Voltage VOUT 12 V
Maximum Output Current IOUT VIN > 5 V 2 A
3 V < VIN < 5 V 0.8 2 A
Output Voltage VOUT_OV 13.2 V
SYSTEM CHARACTERISTICS
Switching Frequency 2.2 MHz
External Clock Synchronization Recommended. IC can synchronize to wider frequency range 1.8 2.5 MHz
Full Load Efficiency 88 %
LM5155-Q1 Junction Temperature, TJ -40 150 C