I am using the TPS40090 (Multi-phase Controller) in two phase configuration. I have de-activated the even phases by connecting them to the output of the internal 5-V LDO (BP5 pin). Current sensing pins CS2 and CS4 are connected to CSCN pin. When i simulate the circuit in TINA-TI, i did not get any output. However when i connect the BP5 pin to 5-V i get my desired output. Do we need to connect the BP5 pin to 5-V for two phase configuration.
Converter Parameter are as follow
Vin=12V.
VOUT=1.5V
Load Current=30A
Switching Frequency=500KHz
No of Phases=2
Any help in this regard will be highly appreciated.
Thanks in Advance