SNVU589A December   2017  – January 2022

 

  1.   Trademarks
  2. 1 Introduction
  3. 2 Description
    1. 2.1 Typical Applications
    2. 2.2 Features
  4. 3 Electrical Performance Specifications
  5. 4 Schematic
  6. 5 Test Setup
    1. 5.1 Test Equipment
    2. 5.2 Recommended Test Setup
  7. 6 Configurations
    1. 6.1 Switching Frequency Selection
    2. 6.2 Soft-Start Selection
    3. 6.3 Mode Selection
    4. 6.4 Enable Selection
  8. 7 Test Procedure
    1. 7.1 Line/Load Regulation and Efficiency Measurement Procedure
    2. 7.2 Control Loop Gain and Phase Measurement Procedure
    3. 7.3 List of Test Points
    4. 7.4 Equipment Shutdown
  9. 8 Performance Data and Typical Characteristic Curves
    1. 8.1 Efficiency
    2. 8.2 Load Regulation
    3. 8.3 Output Transient
    4. 8.4 Output Ripple
    5. 8.5 Switching Node
    6. 8.6 Enable Turn-On/Turn-Off
    7. 8.7 Output 1.1-V Prebias Turn-On
    8. 8.8 Bode Plot
    9. 8.9 Thermal Image
  10. 9 EVM Assembly Drawing and PCB Layout
  11. 10Bill of Materials
  12. 11Revision History

6.1 Switching Frequency Selection

The switching frequency can be set by J1.

Default setting: 300 kHz

Table 6-1 Switching Frequency Selection
JUMPER SET TORESISTOR (RF) CONNECTIONS (Ω)SWITCHING FREQUENCY (kHz)
Top(1-2 pin shorted)0250
Second (3-4 pin shorted)187 k300
Third (5-6 pin shorted)619 k400
Fourth (7-8 pin shorted)Open500
Fifth (9-10 pin shorted)866 k650
Sixth (11-12 pin shorted)309 k750
Seventh (13-14 pin shorted)124 k850
Bottom (15-16 pin shorted)01000