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TPS62811

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2.75V to 6V, 1A step-down converter with adjustable frequency and soft start in QFN package

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Data sheet

TPS62811

ACTIVE
Data sheet Order now

Product details

Rating Catalog Topology Buck, Step-Down Converter, Synchronous Buck Iout (max) (A) 1 Vin (max) (V) 6 Vin (min) (V) 2.75 Vout (max) (V) 5.5 Vout (min) (V) 0.6 Features Adjustable soft start, Adjustable switching frequency, Enable, Forced PWM, Frequency synchronization, Light-load efficiency, Output discharge, Overcurrent protection, Power good, Prebias startup, Spread Spectrum, Synchronous rectification, Thermal shutdown, Tracking, UVLO fixed EMI & noise features Low parasitic Hotrod packaging, Spread Spectrum Control mode current mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.000015 Duty cycle (max) (%) 100
Rating Catalog Topology Buck, Step-Down Converter, Synchronous Buck Iout (max) (A) 1 Vin (max) (V) 6 Vin (min) (V) 2.75 Vout (max) (V) 5.5 Vout (min) (V) 0.6 Features Adjustable soft start, Adjustable switching frequency, Enable, Forced PWM, Frequency synchronization, Light-load efficiency, Output discharge, Overcurrent protection, Power good, Prebias startup, Spread Spectrum, Synchronous rectification, Thermal shutdown, Tracking, UVLO fixed EMI & noise features Low parasitic Hotrod packaging, Spread Spectrum Control mode current mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.000015 Duty cycle (max) (%) 100
VQFN-HR (RWY) 9 6 mm² (3 mm × 2 mm)
  • Functional Safety-Capable
  • Input voltage range: 2.75V to 6V
  • Family of 1A, 2A, 3A, and 4A
  • Quiescent current 15µA typical
  • Output voltage from 0.6V to 5.5V
  • Output voltage accuracy ±1% (PWM operation)
  • Adjustable soft start
  • Forced PWM or PWM and PFM operation
  • Adjustable switching frequency of 1.8MHz to 4MHz
  • Precise ENABLE input allows
    • User-defined undervoltage lockout
    • Exact sequencing
  • 100% duty cycle mode
  • Active output discharge
  • Spread spectrum clocking - optional
  • Power-good output with window comparator
  • Functional Safety-Capable
  • Input voltage range: 2.75V to 6V
  • Family of 1A, 2A, 3A, and 4A
  • Quiescent current 15µA typical
  • Output voltage from 0.6V to 5.5V
  • Output voltage accuracy ±1% (PWM operation)
  • Adjustable soft start
  • Forced PWM or PWM and PFM operation
  • Adjustable switching frequency of 1.8MHz to 4MHz
  • Precise ENABLE input allows
    • User-defined undervoltage lockout
    • Exact sequencing
  • 100% duty cycle mode
  • Active output discharge
  • Spread spectrum clocking - optional
  • Power-good output with window comparator

The TPS6281x is family of pin-to-pin 1A, 2A, 3A, and 4A synchronous step-down DC/DC converters. All devices offer high efficiency and ease of use. The TPS6281x family is based on a peak current mode control topology. The TPS6281x is designed for industrial as well as telecommunication applications. Low resistive switches allow up to 4A continuous output current at high ambient temperature. The switching frequency is externally adjustable from 1.8MHz to 4MHz and can also be synchronized to an external clock in the same frequency range. In PWM/PFM mode, the TPS6281x automatically enter power save mode at light loads to maintain high efficiency across the whole load range. The TPS6281x provide 1% output voltage accuracy in PWM mode which helps design a power supply with high output voltage accuracy. The SS/TR pin allows setting the start-up time or forming tracking of the output voltage to an external source. This feature allows external sequencing of different supply rails and limiting the inrush current during start-up. The TPS6281x is available in a 3mm × 2mm VQFN package.

The TPS6281x is family of pin-to-pin 1A, 2A, 3A, and 4A synchronous step-down DC/DC converters. All devices offer high efficiency and ease of use. The TPS6281x family is based on a peak current mode control topology. The TPS6281x is designed for industrial as well as telecommunication applications. Low resistive switches allow up to 4A continuous output current at high ambient temperature. The switching frequency is externally adjustable from 1.8MHz to 4MHz and can also be synchronized to an external clock in the same frequency range. In PWM/PFM mode, the TPS6281x automatically enter power save mode at light loads to maintain high efficiency across the whole load range. The TPS6281x provide 1% output voltage accuracy in PWM mode which helps design a power supply with high output voltage accuracy. The SS/TR pin allows setting the start-up time or forming tracking of the output voltage to an external source. This feature allows external sequencing of different supply rails and limiting the inrush current during start-up. The TPS6281x is available in a 3mm × 2mm VQFN package.
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* Data sheet TPS6281x 2.75V to 6V, Adjustable-Frequency Step-Down Converter datasheet (Rev. A) PDF | HTML Aug 4, 2026
Functional safety information TPS6281x Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML Jun 22, 2026

Design & development

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Evaluation board

TPS62810EVM-015 — Buck Converter Evaluation Module

The TPS62810EVM-015 evaluation module (EVM) is designed to help the user easily evaluate and test the operation and functionality of the TPS6281X-Q1 automotive step-down converter family. The EVM converts a 2.7-V to 6.0-V input voltage to a regulated 1.8-V output voltage that delivers up to 4 A.

User guide: PDF | HTML
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VQFN-HR (RWY) 9 Ultra Librarian
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