JAJSV63A August 2024 – August 2024 LM5137-Q1
ADVANCE INFORMATION
A multiphase (three or four phases) regulator requires two LM5137-Q1 controllers, as illustrated in Figure 7-9.
Configure the first controller (CNTRL1) as a primary and the second controller (CNTRL2) as a secondary. To configure the second controller, connect a 90.kΩ resistor from CNFG to AGND. This disables both feedback error amplifiers of the secondary controller, placing them in a high-impedance state.
See the Benefits of a Multiphase Buck Converter white paper and Multiphase Buck Design From Start to Finish application report for more information.
RCNFG | PRIMARY / SECONDARY | DRSS | INDEPENDENT OR INTERLEAVED OUTPUTS |
---|---|---|---|
41.2kΩ | Primary | OFF | Interleaved |
54.9kΩ | Primary | DRSS1 | Interleaved |
71.5kΩ | Primary | DRSS2 | Interleaved |
90.9kΩ | Secondary | N/A | Interleaved |