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TPS54231DR

2A non-sync buck, 3.5-28V in, 0.8V out adj, 570kHz, Eco-mode, 8-SOIC

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Manufacturer Part：

TPS54231DR

Package：

8-SOIC (4.90 x 3.91 x 1.58 mm)

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Description

Product Overview

The TPS54231DR from Texas Instruments is a 2A non-synchronous step-down converter in an 8-SOIC package. Operating from 3.5V to 28V input with 570kHz fixed switching frequency, it integrates an 80mOhm high-side MOSFET and features Eco-mode for high light-load efficiency.

Key Specifications

Input Voltage 3.5V ~ 28V
Output Current 2A continuous
Output Voltage 0.8V ~ 25V adjustable
Switching Frequency 570kHz fixed
High-Side RDS(on) 80mOhm (integrated)
Shutdown Current 1uA typical
Package 8-SOIC
Operating Temperature -40°C to +150°C (TJ)

Features

  • Integrated 80mOhm high-side MOSFET
  • Eco-mode pulse skipping for light-load efficiency
  • 1uA shutdown quiescent current
  • Current mode control with internal slope compensation
  • Adjustable UVLO with hysteresis
  • Cycle-by-cycle current limit and thermal shutdown

Applications

  • Consumer set-top boxes and CPE equipment
  • 12V/24V distributed power systems
  • LCD display and peripheral power supplies
  • Industrial and car audio power
  • Battery charger applications

The TPS54231DR from Texas Instruments is a 2A non-synchronous step-down DC-DC converter in an 8-pin SOIC package. Operating from 3.5V to 28V input, it integrates an 80mOhm high-side MOSFET and supports adjustable output down to 0.8V. The 570kHz fixed switching frequency uses current mode control with internal slope compensation, simplifying external compensation. Eco-mode pulse skipping automatically activates at light loads for high efficiency. A 1uA shutdown current suits battery-powered applications. The device includes adjustable UVLO, overvoltage transient protection, cycle-by-cycle current limit, and thermal shutdown.

The TPS54231 uses peak current mode control with a fixed 570kHz oscillator. An error amplifier compares the divided output voltage with a 0.8V internal reference, generating a control voltage. This voltage is compared with the current-sense signal from the high-side MOSFET to determine the PWM duty cycle. Internal slope compensation prevents sub-harmonic oscillation at duty cycles above 50%. In Eco-mode, when the output current drops below a threshold, the device skips switching pulses to reduce switching losses. The external catch diode conducts during the off-time. Current limit is cycle-by-cycle, and frequency foldback provides additional protection during severe overloads.

Pin Name Type Function
1 BOOT Analog Bootstrap capacitor for HS MOSFET
2 VIN Power Input voltage (3.5-28V)
3 EN Input Enable / UVLO adjust
4 SS Analog Soft-start programming
5 FB Input Output voltage feedback
6 COMP Analog Error amplifier output / compensation
7 GND Power Ground
8 PH Power Switch node (inductor / diode)
  • 12V/24V to 3.3V/5V distributed power conversion
  • Set-top box and CPE equipment power supply
  • LCD display and peripheral power rails
  • Industrial and car audio DC-DC conversion
  • Battery-powered equipment regulation
Manufacturer Part Number Package Notes
TI TPS54232DR 8-SOIC 1.5A, 1MHz version
TI TPS54160DR 8-SOIC 1.5A, 60V, non-sync
Monolithic Power MP2307DN 8-SOIC 2A, 4.75-23V, non-sync
onsemi NCP3065DR2G 8-SOIC 1.5A buck controller
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Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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