Low noise power supply with LT1021

Hi Enrico,

LT1021 is at maximum has a 10V output voltage.

For Circuits boosting currents, you could follow this

Maximum current capacity will depend on the transistor.

For Bipolar Output we normally do this setup

But using this for LT1021 will only achieve +10 and -10V.

Regards,

Mon

Dear Mon,
thank you very much for your reply, I appreciate.
In the meantime I found the LT3045 which is a low noise LDO and allows through two resistors to choose the output voltage, good for me. I saw that adding more LT3045 in parallel lower the noise and boosts the output current but also double, triple etc. the cost of the circuit (a single 3045 costs around 7 Euros + shipping).
Could you kindly suggest me a schematic with a power transistor or mosfet at the output of the LT3045 to boost the current to at least 2A? You know, the cost of a power transistor is less than paralleling four LT3045.
Thank you very much in advance for your kind reply.

Cordially,
Enrico

HI Enrico,

Transferred this question to this Q and A as they are more familiar with high current power supplies.

Regards,

Mon

I thank you very much in advance for your kind attention.

Best rehards,

Enrico

Hi Enrico,

These are some option for dual-output POS and NEG supply. This depends on your input voltage source. 1A is kind of large for the NEG output.
https://www.analog.com/en/products/adp5071.html
https://www.analog.com/en/products/lt3471.html

Another option is to use two parts. If input voltage is lower than 15V, you may use boost converter for POS and Inverter for the NEG output: LT8363 and LTC7149.

Hi Enrico,

These are some option for dual-output POS and NEG supply. This depends on your input voltage source. 1A is kind of large for the NEG output.
https://www.analog.com/en/products/adp5071.html
https://www.analog.com/en/products/lt3471.html

Another option is to use two parts. If input voltage is lower than 15V, you may use boost converter for POS and Inverter for the NEG output: LT8363 and LTC7149.