SNVA213B May   2007  – February 2022 LM2745

 

  1.   Trademarks
  2. 1 Introduction
  3. 2 Specifics Of The Board
  4. 3 Feature Options
  5. 4 Specification Summary
  6. 5 Performance Characteristics – Efficiency
  7. 6 Switch Node Voltage and Output Voltage Ripple
  8. 7 Load Transient Response
  9. 8 Bill of Materials
  10. 9 PCB Layout
  11. 10Revision History

3 Feature Options

When the tracking feature of the LM2745 is required for use, remove the jumper that connects the soft-start capacitor, C10, and connect the resistor divider, on designators R13 and R14 (see Figure 3-1). The Track terminal has been provided for the user's connecting convenience. The demo board is synchronize ready, just connect an external clock to the SYNC terminal.

Note: Increasing the switching frequency results in a lower inductor current ripple and input and output voltage ripple (if the component values are kept the same).

Monitor the MOSFET junction temperature since switching losses will increase, and do not exceed the maximum junction temperature of the MOSFET. Refer to the MOSFET manufacturer data sheet for the maximum junction temperature specification and heat sinking guidelines.

GUID-8CEA1AA0-7A60-4C7E-8F48-7C689FFA9C9B-low.gif Figure 3-1 Soft-Start and Tracking Jumper