Multiple outpout DC-DC or LDO recommend

Mike Peng

input 9Vdc-38Vdc:

output	voltage	current	topology
2 channals	5V	~250mA	buck
2 channals	3.3V	~100mA	buck
3 channals	5V	~250mA	buck
	3.3V	~100mA	buck
	15V	1.2-1.5A	buck-boost

over 6 years ago

0 Katelyn Wiggenhorn over 6 years ago

TI__Genius 11040 points

Hello,

For both your 2 and 3 channels you could have one wide input dc-dc which connects to the 9Vdc to 38Vdc rail. Then, have secondary point of load step down converters (or LDOs if appropriate) depending on your requirements.

Please let me know if you have any additional questions.

Best Regards,
Katelyn

0 Mike Peng over 6 years ago in reply to Katelyn Wiggenhorn

Expert 1060 points

Katelyn,
Do you mean one wide input DC-DC and 2 or 3 converters to implement a single input and multiple outputs power(multiple chips)? But what customer's need is using only a single chip to meet the requirements.

0 Katelyn Wiggenhorn over 6 years ago in reply to Mike Peng

TI__Genius 11040 points

Hello,

I mean one wide input DC-DC + 2 to 3 converters for your multiple output rails. This would be an example of a two stage output: www.ti.com/.../PMP15039

If you need one chip, then you are looking at a PMIC. This site page will allow you to do a parametric search for your requirements: www.ti.com/.../products.html

Please let me know if you have any additional questions or if anything is unclear.

Best Regards,
Katelyn

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Multiple outpout DC-DC or LDO recommend