Re: [EE]:: 1 / 2 / 3 cell input boost converters with 1.8 - 5.5 Vout in the sub milliamp to 100 mA+ range. Vinmin 0.5 / 0.7 / ... V

About 15 years ago, I designed a product that runs on two AA cells. I used
an LT1944-1 to get 3.3V and 14V for an OLED display. The product is still
in production.

Harold
https://w6iwi.org


On Tue, February 24, 2026 5:40 pm, RussellMc wrote:
> Someone on SEEE asked a question about a 2 AA cell to 3V3 boost
> converter. I answered based on my current experience with TLV61220.
> (I'm operating at around 200 uA load, so my preferred 61220 IC may not
> suit others. 61225 may be better. (Lower Voperate, wider Vin range, 100 mA
> ish max load, ...)
>
> https://electronics.stackexchange.com/q/766149/3288
>
>
> Also covers TLV61225 and TPS63001
>
>
> I'm very happy with the 61220.
> This may be of interest to others wanting good efficiency, low Iq boost
> converters in this range
>
> TPS61220
> 5 uA Iq
> Vin 0.7 - 5.5V  loaded
> Vout 1.8V - 5.5V
> Iout 100 mA at 1.5Vin, 20 mA at 0.7 Vin
>
>
> TPS61225
> 5 uA Iq
> Vin 0.5-3.3V
> Fixed 3.3V out
> Less good at sub mA levels
> More efficient at > 1 mA out
>
>
> TPS6300x
> Higher Vin_min
> Worse Iq
> Higher Iout
> Lower efficiency
> ...
>
>
> 61220       https://www.ti.com/lit/ds/symlink/tlv61220.pdf
> 61225
> https://www.ti.com/lit/ds/symlink/tlv61225.pdf?ts=1771845254357&ref_url=ht
> tps%253A%252F%252Fwww.google.com%252F 6300x
> https://www.lcsc.com/datasheet/C28060.pdf
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