Negative voltage output LDO alternative model recommendation

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Negative voltage output LDO alternative model recommendation [Copy link]

Package SOT223, pin distribution as shown above, this is a negative voltage LDO from Lingte, fixed output -5V, my input is -9V, now this material costs 66 yuan a piece! ! ! !

Please recommend a model with the same package, output -5V LDO, regardless of domestic or imported

qwqwqw2088

Lingte's chips are expensive.

TI's TPS72301 is not much cheaper

qwqwqw2088

TOREX
Model: XC6902N331PR-G
Package: SOT-89-3

chunyang

Why use LDO when the voltage difference is so large? Just use 7905.

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qwqwqw2088 posted on 2023-6-15 18:07 TOREX Model: XC6902N331PR-G Package: SOT-89-3

I bought 5 pieces for the first version, and I didn't ask at the time. This time the boss said the price was so high. The board was stolen for nearly 2000, and I could only replace it with the original package PtoP. I originally planned to buy 10, but now I have to buy 5 pieces.

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chunyang posted on 2023-6-15 18:37 The voltage difference is so large, why do we have to use LDO? Just use 7905.

In addition to the voltage difference problem of 7805, the output voltage quality in memory is not very good, and the initial voltage accuracy does not seem to be very good. I will check it out and give more consideration to this type of thing in the future.

chunyang

Alas, published on 2023-6-15 18:39 In addition to the voltage difference problem, the quality of the voltage output in the memory of 7805 is not very good, and the initial voltage accuracy does not seem to be very good. I will check it out and I will...

Note that it is 7905! As for your "voltage quality is not very good", let's put it this way, it is not worse than LDO. In terms of price, 7905 costs only a few cents, or even less than 50 cents.

led2015

How to use LM2937IMP

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led2015 posted on 2023-6-15 21:18 How about LM2937IMP

This is a positive output and needs a negative one. Thank you all. I still bought the original one and I don’t use it much.

lkh747566933

I haven't used a negative voltage circuit yet. Is this usually used to power an op amp?