Am 18.03.2018 um 21:13 schrieb John Ackermann N8UR:
Reviving the conversation about superb voltage regulators, I am
looking for one to run the analog and PLL bits of a high performance
frequency synthesizer chip.
The current drain looks to be about 160-180 mA at 1.8 V, which is
uncomfortably close to the limit for the LT3042 (200 mA). The
manufacturer's evaluation board uses a MAX8869, which appears to be
nowhere in the LT3042's league, but will source 1 A.
Any recommendations for a 1.8 V regulator a little beefier than the
LT3042, but with similar noise performance?
Use the LT3042 with an external power transistor, such as D44VH10G:
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https://www.flickr.com/photos/137684711@N07/29197476530/in/album-72157662535945536/
>
Performance is about the same as the LT3042 alone. That is exactly the
circuit from the data sheet.
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https://www.flickr.com/photos/137684711@N07/29452163806/in/album-72157662535945536/
>
The layout for Altium Designer is available.
The LT3045 is not so much bigger that it makes a real progress. The
currents are valid only
for tiny voltage drops anyway.
regards,
Gerhard
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