Product details

Iout (Max) (A) 3 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
Iout (Max) (A) 3 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
uSiP (SIL) 14 12 mm² 2.8 x 3
  • 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
  • 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

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.

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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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) 03 Dec 2020
Application note A Topical Index of TI Low Power Buck DC/DC Application Notes (Rev. A) 25 Jun 2021
User guide Manufacturing and Rework Design Guide for MicroSiP™ Power Modules (Rev. A) 16 Jun 2021
Application note Achieving High Thermal Performance in Compact Buck Power Modules 24 Feb 2021
White paper Benefits of a Resistor-to-Digital Converter in Ultra-Low Power Supplies 14 Oct 2019
Analog design journal Methods of output-voltage adjustment for DC/DC converters 14 Jun 2019
Application note Performing Accurate PFM Mode Efficiency Measurements (Rev. A) 11 Dec 2018
Application note QFN and SON PCB Attachment (Rev. B) 24 Aug 2018
Analog design journal Understanding 100% mode in low-power DC/DC converters 22 Jun 2018
Analog design journal Improving the thermal performance of a MicroSiP(TM) power module 24 Jul 2017
Analog design journal Testing tips for applying external power to supply outputs without an input volt 24 Oct 2016
Analog design journal Adjusting the soft-start time of an integrated power module 26 Apr 2016
Application note Choosing an Appropriate Pull-up/Pull-down Resistor for Open Drain Outputs 19 Sep 2011
Analog design journal IQ: What it is, what it isn’t, and how to use it 17 Jun 2011
More literature Описание TPS8267xSiP 22 Mar 2011

Design & development

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Evaluation board

TPSM82810EVM-089 — 4-A step-down converter with integrated inductor evaluation module

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 (...)

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TPSM82813 PSpice Unencrypted Transient Model (Rev. B)

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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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