SBVU066A August   2020  – April 2021 TPS51397A

 

  1.   Trademarks
  2. 1Introduction
  3. 2Performance Specification Summary
  4. 3Modifications
    1. 3.1 Output Voltage Setpoint
    2. 3.2 Mode Selection
  5. 4Test Setup and Results
    1. 4.1 Input/Output Connections
    2. 4.2 Start-Up
    3. 4.3 Shutdown
    4. 4.4 Load Transient Response
    5. 4.5 Output Voltage Ripple
  6. 5Board Layout
    1. 5.1 Layout
  7. 6Schematic and Bill of Materials
    1. 6.1 Schematic
    2. 6.2 Bill of Materials
  8. 7References
  9. 8Revision History

3.2 Mode Selection

The TPS51397A has a MODE pin to select the operation mode. The device reads the voltage on MODE pin during start-up and latches onto one of the MODE options listed below in Table 3-1.

Table 3-1 Mode Pin Resistor Settings
VOLTAGE ON MODE R9/10/11/12 (kΩ) R13/14/15/16 (kΩ) OPERATION FREQUENCY (kHz)
(0~10%)*VCC

330

15

 Eco-mode

500
(10~20%)*VCC

180

33

OOA

500
(20~30%)*VCC

160

51

 Eco-mode

800
(30~50%)*VCC

75

51

OOA

800
Change the position of the jumper on J4 to modify the MODE configuration before start up.