Summary of TI RELEASE TPS62912, TPS62913 FAMILY OF LOW-NOISE DC/DC SWITCHING REGULATORS
Texas Instruments introduced the TPS62912 and TPS62913, low-noise DC/DC switching regulators with integrated ferrite-bead compensation. These devices achieve ultra-low output ripple of 10 µVRMS and a power-supply rejection ratio of 65 dB up to 100 kHz. They support spread-spectrum frequency modulation and external clock synchronization. With peak efficiency reaching 97%, they eliminate the need for LDOs in analog front-end designs, significantly reducing power losses.
Parts used in the TPS62912 and TPS62913 Project:
- TPS62912 converter
- TPS62913 converter
- Ferrite bead
- Analog front-end (AFE)
- Wideband ADC
- External clock
Texas Instruments released the TPS62912 and TPS62913 family of low-noise DC/DC switching regulators with integrated ferrite-bead compensation. They offer low noise of 20 µVRMS for frequencies ranging from 100 Hz to 100 kHz and ultra-low output-voltage ripple of 10 µVRMS.
Traditional low-noise power supply architectures include such technology like DC/DC converters, low-noise LDO, and an off-chip filter, like a ferrite bead. Integrating ferrite-bead compensation allows the TPS62912 and TPS62913 to use the already present ferrite bead as a filter against high-frequency noise and reduce power supply output voltage ripple by upwards of 30 dB.
Further, both converters offer a power-supply rejection ratio of 65 dB at up to 100 kHz. They also enable spread-spectrum frequency modulation to advance attenuate radio-frequency spurs. In addition to this, the TPS62912 and TPS62913 allow synchronization to an external clock, providing the ability to meet signal-to-noise ratios and spurious-free dynamic range targets.
Featuring a peak efficiency of 97%, the converters allow for engineers to design for noise filtering without an LDO. This reduces power losses by up to 76% and 1.8 W in analog front-end (AFE) designs and 1.5 W in designs using a wideband ADC.
Read more: TI RELEASE TPS62912, TPS62913 FAMILY OF LOW-NOISE DC/DC SWITCHING REGULATORS
- What is the output voltage ripple of the TPS62912 and TPS62913?
The converters offer an ultra-low output-voltage ripple of 10 µVRMS. - How much does the ferrite-bead compensation reduce power supply output voltage ripple?
It reduces the ripple by upwards of 30 dB. - Does the TPS62912 and TPS62913 support synchronization to an external clock?
Yes, both converters allow synchronization to an external clock. - Can these converters be used without an LDO in analog front-end designs?
Yes, their high efficiency allows engineers to design for noise filtering without an LDO. - What is the peak efficiency of the TPS62912 and TPS62913?
The converters feature a peak efficiency of 97%. - Does the device offer a power-supply rejection ratio at 100 kHz?
Yes, both converters offer a power-supply rejection ratio of 65 dB at up to 100 kHz. - How do the converters handle radio-frequency spurs?
They enable spread-spectrum frequency modulation to advance attenuate radio-frequency spurs. - What is the noise level for frequencies ranging from 100 Hz to 100 kHz?
The devices offer a low noise of 20 µVRMS for this frequency range.
