The TPS7A02 is a low-dropout regulator that draws only 25 nA typical for itself, can supply 200 mA, and takes 1.5 to 6.0 V in, so it suits battery robots and sensors that spend most of their time asleep. It keeps that low current even when in dropout. Compared with the LM1117 it is for small, low-power rails rather than higher current. Figures are from the Texas Instruments TPS7A02 datasheet SBVS277C.
Key specifications
| Input | 1.5–6.0 V |
|---|---|
| Output | 0.8–5.0 V fixed |
| Current | 200 mA |
| IQ | 25 nA typical |
| Shutdown IQ | 3 nA |
| Accuracy | 1.5% |
What the datasheet promises
| Item | Datasheet value |
|---|---|
| Input voltage | 1.5 to 6.0 V |
| Output voltage | 0.8 to 5.0 V, fixed, in 50 mV steps |
| Output current | 200 mA |
| Quiescent current | 25 nA typical, even in dropout |
| Shutdown current | 3 nA typical |
| Output accuracy | 1.5 percent over temperature |
| Dropout | 270 mV maximum at 200 mA with a 3.3 V output |
| Output capacitor | Stable with 1 µF or larger |
| Enable | Smart enable pulldown keeps the output off if EN floats |
| Transient | Settles in under 10 µs on a 1 to 50 mA step, with 100 mV undershoot |
| Temperature | Specified for junction temperature −40 to 125 °C |
| Packages | X2SON (1.0 × 1.0 mm), SOT23-5 and DSBGA |
It is a fixed-output part: you buy the output voltage you need rather than setting it with resistors. The very small packages are hard to hand-solder, so most people use it on a ready-made module.
Using it on a robot
- Power a microcontroller or sensor that sleeps for long periods from a single cell or a 3.3 V to 6 V source.
- For higher current or higher input voltage, use a buck converter such as the TPS63020 instead.
- Place a 1 µF or larger ceramic capacitor on the output.
Sources and further reading
- Texas Instruments TPS7A02 datasheet (SBVS277C) — input range, outputs, quiescent current, dropout and packages above.
Last reviewed: November 2026. Limits are from the Texas Instruments datasheet; breakout boards and modules vary. No price is quoted because it has not been checked.
Where to buy in India
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