LDO for STM32H573AII3Q
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‎2024-02-20 8:37 PM
STM32H573AII3Q is a 169 pin UFBGA SMPS package. Along with SMPS option, does it also have internal LDO for core supply? Can we use internal LDO to supply core voltage for this package?
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‎2024-02-21 1:53 AM - edited ‎2024-02-21 1:54 AM
Hello @madhu1 ,
Only SMPS is supported by this package. And according to the reference manual:
So the package has only one PWR config: SMPS or LDO.
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‎2024-02-21 1:53 AM - edited ‎2024-02-21 1:54 AM
Hello @madhu1 ,
Only SMPS is supported by this package. And according to the reference manual:
So the package has only one PWR config: SMPS or LDO.
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‎2024-02-21 3:34 AM
Hello,
I think it has both option. Even for SMPS power scheme, there is a LDO shown internal to uC. Refer below image: Please let me know if my understanding is correct.
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‎2024-02-21 3:48 AM
Indeed the LDO is there on the die but it is disabled by HW as already said in RM section 10.5.1.
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‎2024-02-21 10:19 PM
I was also a bit confused on my STM32U5A5 with LDO vs. SPMS:
- these are two different order options!
- the pins are different
- if SMPS chip version - you have to enable SMPS
As I understand it: there is NOT an option to decide between LDO or SMPS (it is a bonding feature, a package feature).
And my datasheet says clearly (as I understand): SMPS version does not have CAP for LDO. So, I assume, there is not an LDO option.
It might be misleading to see "LDO regulator": potentially, it should be marked as "bonding variant". The note 2. makes it clear for me, that LDO is not an option on an SMPS package.
