Other Parts Discussed in Thread: DAC8734, TIDA-01423, , LMR33640, TPS62933
Hi TI experts.
I need to design from a 5V input a -12V output to be fed to the negative rail of the TI DAC8734.
So I have taken as a starting point the TIDA-01423 3-V to 4.5-V Input, 400-mA, –12-V Inverting Buck-Boost Reference Design
it helps me, being in a hurry for the design as a good starting point for generating from a 5V the negative rail.
however using the TPS62136 that has a 3V to 17V input range the design says:
" The output voltage range is the same as when configured as a buck converter, but negative. The output voltage for the inverting buck-boost topology must be set between –0.8 V and –12 V. The output voltage is set in the same way as the buck configuration, with two resistors connected to the FB pin. The TIDA-01423 design sets the output voltage at –12 V, which gives an input voltage range of 3 V to 5 V. However, TI does not recommend to use a 5-V input voltage because voltage tolerances on the input supply can violate the recommended operating range of TPS62136."
could you please point me out some alternative for this chip? I have spent many days trying to navigate through without effort.
Best regards and thanks.