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TPS543021

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Convertidor buck síncrono de 400 kHz, 3 A y entrada de 4.5 V a 30 V

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TPS543021

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Detalles del producto

Rating Catalog Topology Buck Iout (max) (A) 3 Vin (max) (V) 30 Vin (min) (V) 4.5 Vout (max) (V) 30 Vout (min) (V) 0.6 Features Enable, Light load efficiency, Pre-Bias Start-Up, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, UVLO adjustable EMI features Spread Spectrum Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000045 Duty cycle (max) (%) 100 Sector Test & measurement
Rating Catalog Topology Buck Iout (max) (A) 3 Vin (max) (V) 30 Vin (min) (V) 4.5 Vout (max) (V) 30 Vout (min) (V) 0.6 Features Enable, Light load efficiency, Pre-Bias Start-Up, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, UVLO adjustable EMI features Spread Spectrum Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000045 Duty cycle (max) (%) 100 Sector Test & measurement
SOT-5X3 (DRL) 6 2.56 mm² (1.6 mm × 1.6 mm)
  • Configured for a wide range of applications
    • 4.5V to 28V input voltage range
    • Up to 3A continuous output current
    • –40°C to 150°C junction temperature range
    • 70ns minimum switching on time
    • ±1% tolerance reference voltage (25°C)
    • Supports low drop out mode
    • Precision enable
  • High efficiency
    • Integrated 75mΩ and 35mΩ MOSFETs
    • Low 2µA shutdown, 28µA quiescent current
    • Pulse frequency modulation (PFM) for high light load efficiency
  • Ease of use
    • Peak current mode control with internal compensation
    • Fixed 400kHz switching frequency
    • Internal 5ms soft start
    • Frequency spread spectrum to reduce EMI
    • Overcurrent protection with hiccup mode
    • Non-latched protection for overtemperature protection (OTP), overcurrent protection (OCP), overvoltage protection (OVP), and undervoltage lockout (UVLO)
    • SOT-563 package
  • Create a custom design using the TPS543021 with the WEBENCH Power Designer
  • Configured for a wide range of applications
    • 4.5V to 28V input voltage range
    • Up to 3A continuous output current
    • –40°C to 150°C junction temperature range
    • 70ns minimum switching on time
    • ±1% tolerance reference voltage (25°C)
    • Supports low drop out mode
    • Precision enable
  • High efficiency
    • Integrated 75mΩ and 35mΩ MOSFETs
    • Low 2µA shutdown, 28µA quiescent current
    • Pulse frequency modulation (PFM) for high light load efficiency
  • Ease of use
    • Peak current mode control with internal compensation
    • Fixed 400kHz switching frequency
    • Internal 5ms soft start
    • Frequency spread spectrum to reduce EMI
    • Overcurrent protection with hiccup mode
    • Non-latched protection for overtemperature protection (OTP), overcurrent protection (OCP), overvoltage protection (OVP), and undervoltage lockout (UVLO)
    • SOT-563 package
  • Create a custom design using the TPS543021 with the WEBENCH Power Designer

The TPS543021 is a 4.5V to 28V input voltage range, 3A synchronous buck converter. The device includes two integrated switching FETs, internal loop compensation and 5ms internal soft start to reduce component count.

By integrating the MOSFETs, the TPS543021 achieves the high power density and offers a small footprint on the PCB. TPS543021 has adjustable output by a different FB resistor configuration.

The TPS543021 operates in PFM (pulse frequency modulation) mode for high light load efficiency and reduces the power loss. The device incorporates spread spectrum for Electromagnetic Interference (EMI) reduction.

Cycle-by-cycle current limit in high-side MOSFET protects the converter in an overload condition and is enhanced by a low-side MOSFET freewheeling current limit which prevents current runaway. Hiccup mode protection is triggered if the overcurrent condition has persisted for longer than the preset time.

The TPS543021 is a 4.5V to 28V input voltage range, 3A synchronous buck converter. The device includes two integrated switching FETs, internal loop compensation and 5ms internal soft start to reduce component count.

By integrating the MOSFETs, the TPS543021 achieves the high power density and offers a small footprint on the PCB. TPS543021 has adjustable output by a different FB resistor configuration.

The TPS543021 operates in PFM (pulse frequency modulation) mode for high light load efficiency and reduces the power loss. The device incorporates spread spectrum for Electromagnetic Interference (EMI) reduction.

Cycle-by-cycle current limit in high-side MOSFET protects the converter in an overload condition and is enhanced by a low-side MOSFET freewheeling current limit which prevents current runaway. Hiccup mode protection is triggered if the overcurrent condition has persisted for longer than the preset time.
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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos TPS543021 4.5V to 28V, 3A, EMI Friendly, Synchronous Step-Down Converter datasheet (Rev. A) PDF | HTML 16/09/2025
Certificado TPS543021EVM EU Declaration of Conformity (DoC) 17/07/2025

Diseño y desarrollo

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Placa de evaluación

TPS543021EVM — Módulo de evaluación de convertidor reductor TPS543021

The TPS543021EVM evaluation module (EVM) helps designers evaluate the operation and performance of the easy-to-use, 3A synchronous step-down converter TPS543021. The TPS543021EVM operates from 6V to 28V input, 24V nominal and provides a 5V output at 3A. The switching frequency is 400kHz. The EVM (...)

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