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TPSM82912

ACTIVE

17-V, 2-A low-noise and low-ripple buck module with integrated ferrite bead filter compensation

Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck, Synchronous Buck Type Module Iout (max) (A) 2 Vin (min) (V) 3 Vin (max) (V) 17 Vout (min) (V) 0.8 Vout (max) (V) 5.5 Switching frequency (min) (kHz) 1000 Switching frequency (max) (kHz) 2200 Features Enable, Frequency synchronization, Low Noise, Output discharge, Overcurrent protection, Power good, Remote Sense, Spread Spectrum Control mode current mode Duty cycle (max) (%) 100
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck, Synchronous Buck Type Module Iout (max) (A) 2 Vin (min) (V) 3 Vin (max) (V) 17 Vout (min) (V) 0.8 Vout (max) (V) 5.5 Switching frequency (min) (kHz) 1000 Switching frequency (max) (kHz) 2200 Features Enable, Frequency synchronization, Low Noise, Output discharge, Overcurrent protection, Power good, Remote Sense, Spread Spectrum Control mode current mode Duty cycle (max) (%) 100
B0QFN (RDU) 28 24.75 mm² 5.5 x 4.5
  • Low output noise < 20 µV RMS (100 Hz to 100 kHz)
  • Low output voltage ripple < 10 µV RMS after ferrite bead
  • High PSRR of > 65 dB (up to 100 kHz)
  • 2.2-MHz or 1-MHz fixed frequency peak current mode control
  • Synchronizable with external clock (optional)
  • Integrated loop compensation supports ferrite bead for second stage L-C filter with 30-dB attenuation (optional)
  • Spread spectrum modulation (optional)
  • 3.0-V to 17-V input voltage range
  • 0.8-V to 5.5-V output voltage range
  • 57-mΩ/20-mΩ R DSon
  • Output voltage accuracy of ±1%
  • Precise enable input allows
    • User-defined undervoltage lockout
    • Exact sequencing
  • Adjustable soft start
  • Power-good output
  • Output discharge (optional)
  • –40°C to 125°C junction temperature range
    • –55°C to 125°C for -ET versions
  • Create a custom design using the TPSM8291x with the WEBENCH Power Designer
  • Low output noise < 20 µV RMS (100 Hz to 100 kHz)
  • Low output voltage ripple < 10 µV RMS after ferrite bead
  • High PSRR of > 65 dB (up to 100 kHz)
  • 2.2-MHz or 1-MHz fixed frequency peak current mode control
  • Synchronizable with external clock (optional)
  • Integrated loop compensation supports ferrite bead for second stage L-C filter with 30-dB attenuation (optional)
  • Spread spectrum modulation (optional)
  • 3.0-V to 17-V input voltage range
  • 0.8-V to 5.5-V output voltage range
  • 57-mΩ/20-mΩ R DSon
  • Output voltage accuracy of ±1%
  • Precise enable input allows
    • User-defined undervoltage lockout
    • Exact sequencing
  • Adjustable soft start
  • Power-good output
  • Output discharge (optional)
  • –40°C to 125°C junction temperature range
    • –55°C to 125°C for -ET versions
  • Create a custom design using the TPSM8291x with the WEBENCH Power Designer

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.

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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Technical documentation

Design & development

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Evaluation board

TPSM82912EVM — TPSM82912 evaluation module for 2-A low-noise and low-ripple buck module

The TPSM82912 evaluation module (EVM) (BSR213) facilitates the evaluation of the TPSM82912. TPSM82912 and TPSM82913 are 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 (...)
User guide: PDF | HTML
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Simulation model

TPSM82912 PSPICE Transient Model

SLVMDZ0.ZIP (373 KB) - PSpice Model
Simulation model

TPSM82912 SIMPLIS Transient Model

SLVMDZ1.ZIP (672 KB) - SIMPLIS Model
Package Pins CAD symbols, footprints & 3D models
B0QFN (RDU) 28 Ultra Librarian

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