2.75-V to 6-V, 4-A step-down module with adjustable-frequency & tracking in 3 x 4-mm μSIP package


Product details


Iout (Max) (A) 4 Vin (Min) (V) 2.75 Vin (Max) (V) 6 Vout (Min) (V) 0.6 Vout (Max) (V) 5.5 Soft start Adjustable Features EMI Tested, Enable, Frequency Synchronization, Light Load Efficiency, Output Discharge, Power Good, Spread Spectrum, Tracking Operating temperature range (C) -40 to 125 Iq (Typ) (uA) 15 Regulated outputs (#) 1 Switching frequency (Max) (kHz) 4000 Switching frequency (Min) (kHz) 1800 Duty cycle (Max) (%) 100 Topology Buck open-in-new Find other Buck modules (integrated inductor)

Package | Pins | Size

uSiP (SIL) 14 uSiP (SIL) 14 12 mm² 2.8 x 3 open-in-new Find other Buck modules (integrated inductor)


  • Input voltage range: 2.75 V to 6 V
  • Output voltage range: 0.6 V to 5.5 V
  • Adjustable and synchronizable switching frequency of 1.8 MHz to 4 MHz
  • Spread spectrum clocking - optional
  • Selectable forced PWM or PFM/PWM operation

  • Output voltage accuracy ±1% (PWM operation)
  • Power-good output with window comparator
  • 100% duty cycle
  • Output discharge
  • Precise ENABLE input allows
    • User-defined undervoltage lockout
    • Exact sequencing
  • 15-µA typical quiescent current
  • Adjustable soft-start or tracking
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TPSM8281x is a family of pin-to-pin 3-A and 4-A compatible high efficiency and easy to use synchronous step-down DC/DC power modules with integrated inductors. They are based on a fixed-frequency peak current-mode control topology. They are used in telecommunication, test and measurement, and medical applications with high power density and ease of use requirements. Low resistance switches allow up to 4-A continuous output current at high ambient temperatures. The switching frequency is externally adjustable from 1.8 MHz to 4 MHz and can also be synchronized to an external clock in the same frequency range. In PFM/PWM mode, the TPSM8281x automatically enters Power Save Mode at light loads to maintain high efficiency across the whole load range. The TPSM8281x provides a 1% output voltage accuracy in PWM mode which helps design a power supply with high output voltage accuracy. The SS/TR pin sets the start-up time or tracks the output voltage to an external source. This allows external sequencing of different supply rails and limits the inrush current during start-up.

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NEW TPSM82813 ACTIVE 2.75-V to 6-V, 3-A step-down module with adjustable-frequency & tracking in 3 x 4-mm μSIP package Check out the TPSM82813 for a drop-in alternative with less output current.
Similar functionality to the compared device.
NEW TPSM82821 ACTIVE 5.5-V input, 1-A step-down module with integrated inductor in 2 x 2.5 x 1.1-mm μSIP package Check out the TPSM82821 for a smaller BOM size and a reduced feature set.
NEW TPSM82822 ACTIVE 5.5-V input, 2-A step-down module with integrated inductor in 2 x 2.5 x 1.1-mm μSIP package Check out the TPSM82822 for a smaller BOM size and a reduced feature set.

Technical documentation

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Type Title Date
* Data sheet TPSM8281x 2.75-V to 6-V Input 4-A and 3-A Step-Down MicroSiP™ Power Module with Integrated Inductor and Frequency Synchronization datasheet (Rev. A) Dec. 03, 2020
User guide Manufacturing and Rework Design Guide for MicroSiP™ Power Modules (Rev. A) Jun. 16, 2021
Application note Achieving High Thermal Performance in Compact Buck Power Modules Feb. 24, 2021
White paper Benefits of a Resistor-to-Digital Converter in Ultra-Low Power Supplies Oct. 14, 2019
Application note Methods of output-voltage adjustment for DC/DC converters Jun. 14, 2019
Application note Performing Accurate PFM Mode Efficiency Measurements (Rev. A) Dec. 11, 2018
Application note QFN and SON PCB Attachment (Rev. B) Aug. 24, 2018
Application note Understanding 100% mode in low-power DC/DC converters Jun. 22, 2018
Application note A Topical Index of TI Low Power Buck DC/DC Application Notes Jan. 17, 2018
Application note Improving the thermal performance of a MicroSiP(TM) power module Jul. 24, 2017
Application note Testing tips for applying external power to supply outputs without an input volt Oct. 24, 2016
Application note Adjusting the soft-start time of an integrated power module Apr. 26, 2016
Application note Choosing an Appropriate Pull-up/Pull-down Resistor for Open Drain Outputs Sep. 19, 2011
Application note IQ: What it is, what it isn’t, and how to use it Jun. 17, 2011
More literature Описание TPS8267xSiP Mar. 22, 2011

Design & development

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Hardware development

document-generic User guide

The TPSM82810EVM-089 evaluation module (EVM) is designed to help the user easily evaluate and test the operation and functionality of the TPSM82810 power module. The EVM converts a 2.75-V to 6-V input voltage to a 1.8-V regulated output voltage at up to 4-A of output current. The TPSM82810 includes (...)

  • 2.75-V to 6-V input voltage range
  • 1.8-V output voltage (adjustable)
  • 4-A output current
  • 86-mm² total solution size

Design tools & simulation

SLUM701B.ZIP (85 KB) - PSpice Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SLVC780.ZIP (138 KB)

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uSiP (SIL) 14 View options

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