TPS61025: vs TPS61201

Anton Chan

Part Number: TPS61025
Other Parts Discussed in Thread: TPS61201,

Hi,

I am using the TPS61025EVM to power my design but saw a post by one of your engineers about possibly switching to another Boost Regulator because of tantalum cap.

I saw this one and would like to know what the pros and cons of this one is: TPS61201

Here is the post:
https://e2e.ti.com/support/power-management/f/196/t/234226?TPS61025-use-on-TPS61020-EVM-

Here are my requirements:

It needs 3.3Vout using two AA batteries. Using a power supply, I am able to get it working at anything above 2.5Vin but anything below that (eg. 1.5V) does not power on properly.

It looks like connecting the batteries in Parallel will work but Series won't.

The microcontroller is the Wroom02/Esp8266 which has an initial spike up to around 300mA (maybe even 1A lol). It's usually in deep sleep though, with the TPS61025 Quiescent Current is around 90uA.

over 6 years ago

0 Minqiu Xie over 6 years ago

TI__Mastermind 21565 points

Hi Anton:
Did you use the power supply as the input source, or battery? Have you test the waveform when Vin below 2.5V with and without the load?

Besides TPS61021 has much high switching frequency, so that it could use smaller inductance and capacitor to achieve similar ripple spec.

0 Minqiu Xie over 6 years ago in reply to Minqiu Xie

TI__Mastermind 21565 points

Hi Anton:
I haven’t heard back from you, I’m assuming you were able to resolve your issue. If not, just post a reply below (or create a new thread if the thread has locked due to time-out)

0 Anton Chan over 6 years ago in reply to Minqiu Xie

Prodigy 40 points

Hey,

I received the 61201 EVM board but it didn't work at any voltage under load from the wroom 02. Will check waveforms, what should I measure that against?

The TSP61025 EVM board works at 3.5v down to 2.5v so thinking it should be good to use 2 AA batteries in Series.

Anton.

0 Minqiu Xie over 6 years ago in reply to Anton Chan

TI__Mastermind 21565 points

Hi Anton:
About 61021, what's your setup? May the circuit work with no load?

0 Anton Chan over 6 years ago in reply to Minqiu Xie

Prodigy 40 points

Yes, both output 3.3v correctly at vin 1.5v-3.75v without any load. Only the 61025 outputs 3.3v at 2.5v-3.75v.

Btw it is tps61201 not tps61021 as I think the latter outputs 5.5v?

Also I am using the evm boards for both of them.

0 Minqiu Xie over 6 years ago in reply to Anton Chan

TI__Mastermind 21565 points

Hi Anton:
I'm sorry for my mistake. Could you please share the setup with me? And could it work if connect the load after the Vout reach 3.3?

0 Minqiu Xie over 6 years ago in reply to Minqiu Xie

TI__Mastermind 21565 points

Hi Anton
I haven’t heard back from you, I’m assuming you were able to resolve your issue. If not, just post a reply below (or create a new thread if the thread has locked due to time-out)

0 Anton Chan over 6 years ago in reply to Minqiu Xie

Prodigy 40 points

Hey sorry,

It is using an wroom-02. So even hooking up to the 3.3v in wroom-02 it won't start up properly.

learn.edwinrobotics.com/.../

Anton.

0 Minqiu Xie over 6 years ago in reply to Anton Chan

TI__Mastermind 21565 points

Hi Aton:

I'm not familiar with the wroom-02. So you need to share the load details spec. Thanks~

0 Minqiu Xie over 6 years ago in reply to Minqiu Xie

TI__Mastermind 21565 points

Hi Anton:
I haven’t heard back from you. I'd close your post. If not solved, just post a reply below (or create a new thread if the thread has locked due to time-out)

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TPS61025: vs TPS61201