The TPSM8291x devices are a family of high-efficiency, low-noise and low-ripple current mode synchronous buck power modules. The devices are ideal for noise sensitive applications that would normally use an LDO for post regulation such as high-speed ADCs, clock and jitter cleaner, serializer, de-serializer, and radar applications.
The devices operate at a fixed switching frequency of 2.2 MHz or 1 MHz and can be synchronized to an external clock.
To further reduce the output voltage ripple, the device integrates loop compensation to operate with an optional second-stage ferrite bead L-C filter. This feature allows an output voltage ripple below 10 µV RMS.
Low-frequency noise levels, similar to a low-noise LDO, are achieved by filtering the internal voltage reference with an integrated capacitor on the NR/SS pin. An external capacitor can be added to the module for additional filtering.
The optional spread spectrum modulation scheme spreads the DC/DC switching frequency over a wider span, which lowers the mixing spurs.
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The TPSM8291xEVM (BSR213) facilitates the evaluation of the TPSM8291x 2-A and 3-A pin-to-pin compatible low-noise ( < 20 μVRMS) and low-ripple ( < 10 μVRMS) buck power modules in small 4.5-mm by 5.5-mm QFN packages. The BSR213-001 uses the 3-A TPSM82913 to output a 1.2-V output voltage (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| B0QFN (RDU) | 28 | Ultra Librarian |
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