Product details

Iout (Max) (A) 3 Vin (Min) (V) 3 Vin (Max) (V) 17 Vout (Min) (V) 0.8 Vout (Max) (V) 5.5 Soft start Adjustable Features Enable, Frequency Synchronization, Output Discharge, Overcurrent protection, Power Good, Remote Sense, Spread Spectrum Iq (Typ) (uA) 5000 Regulated outputs (#) 1 Switching frequency (Max) (kHz) 2200 Switching frequency (Min) (kHz) 1000 Duty cycle (Max) (%) 100 Topology Buck, Synchronous Buck
Iout (Max) (A) 3 Vin (Min) (V) 3 Vin (Max) (V) 17 Vout (Min) (V) 0.8 Vout (Max) (V) 5.5 Soft start Adjustable Features Enable, Frequency Synchronization, Output Discharge, Overcurrent protection, Power Good, Remote Sense, Spread Spectrum Iq (Typ) (uA) 5000 Regulated outputs (#) 1 Switching frequency (Max) (kHz) 2200 Switching frequency (Min) (kHz) 1000 Duty cycle (Max) (%) 100 Topology Buck, Synchronous Buck
B0QFN (RDU) 28 25 mm² 4.5 x 5.5 B0QFN (RDU) 28
  • Low output noise < 20 µVRMS (100 Hz to 100 kHz)
  • Low output voltage ripple < 10 µVRMS 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 RDSon
  • 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 µVRMS (100 Hz to 100 kHz)
  • Low output voltage ripple < 10 µVRMS 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 RDSon
  • 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 µVRMS.

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 µVRMS.

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

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Type Title Date
* Data sheet TPSM8291x 3-V to 17-V, 2-A/3-A Low-Noise and Low-Ripple Buck Power Module with Integrated Ferrite Bead Filter Compensation datasheet (Rev. A) PDF | HTML 07 Dec 2022
EVM User's guide TPSM8291x Step-Down Power Module Evaluation Module User's Guide PDF | HTML 05 Oct 2022
Certificate TPSM82913EVM EU RoHS Declaration of Conformity (DoC) 27 Sep 2022
Technical article Minimize noise and ripple with a low-noise buck converter 21 Oct 2020
Technical article Understanding and managing buck regulator output ripple 18 Jun 2020

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

TPSM82913EVM — TPSM82913 evaluation module for 3-A low-noise and low-ripple buck module

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 (...)

User guide: PDF | HTML
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Simulation model

TPSM82913 PSPICE Model (Rev. A)

SLVMDY2A.ZIP (390 KB) - PSpice Model
Simulation model

TPSM82913 SIMPLIS Model (Rev. A)

SLVMDY1A.ZIP (658 KB) - SIMPLIS Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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B0QFN (RDU) 28 View options

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