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TPS542021

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4.5V 至 30V 輸入、2A、500kHz 同步降壓轉換器

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TPS542021

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Rating Catalog Topology Buck Iout (max) (A) 2 Vin (max) (V) 30 Vin (min) (V) 4.5 Vout (max) (V) 30 Vout (min) (V) 0.6 Features Enable, Light-load efficiency, Prebias startup, Soft-start fixed, Spread Spectrum, Synchronous rectification, UVLO adjustable EMI features Spread Spectrum Control mode current mode Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 500 Operating temperature range (°C) -40 to 150 Iq (typ) (µA) 45 Duty cycle (max) (%) 100 Type Converter
Rating Catalog Topology Buck Iout (max) (A) 2 Vin (max) (V) 30 Vin (min) (V) 4.5 Vout (max) (V) 30 Vout (min) (V) 0.6 Features Enable, Light-load efficiency, Prebias startup, Soft-start fixed, Spread Spectrum, Synchronous rectification, UVLO adjustable EMI features Spread Spectrum Control mode current mode Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 500 Operating temperature range (°C) -40 to 150 Iq (typ) (µA) 45 Duty cycle (max) (%) 100 Type Converter
SOT-23-THN (DDC) 6 8.12 mm² 2.9 x 2.8 SOT-5X3 (DRL) 6 2.56 mm² 1.6 x 1.6
  • Configured for a wide range of applications
    • Input voltage range: 4.5V to 30V
    • Selectable adjustable output (TPS542021), fixed 5V output (TPS542025)
    • Continuous output current: up to 2A
    • Reference voltage: 0.6V ± 1.5% (25°C)
    • Supports low drop out mode
  • High efficiency
    • Integrated MOSFETs: 100mΩ and 60mΩ
    • Low 2µA shutdown, 26µA quiescent current
    • Pulse frequency modulation (PFM) for high light load efficiency
  • Ease of use
    • Peak current mode control with internal loop compensation
    • Fixed switching frequency: 500kHz
    • Internal soft start: 5ms
    • Frequency spread spectrum to reduce EMI
    • Overcurrent protection for both MOSFETs with hiccup mode protection
    • Non-latched protection for over temperature protection (OTP), overcurrent protection (OCP), overvoltage protection (OVP), and undervoltage lockout (UVLO)
    • P2P, B2B with TPS54202
    • SOT-23 (6), SOT-563 package
  • Configured for a wide range of applications
    • Input voltage range: 4.5V to 30V
    • Selectable adjustable output (TPS542021), fixed 5V output (TPS542025)
    • Continuous output current: up to 2A
    • Reference voltage: 0.6V ± 1.5% (25°C)
    • Supports low drop out mode
  • High efficiency
    • Integrated MOSFETs: 100mΩ and 60mΩ
    • Low 2µA shutdown, 26µA quiescent current
    • Pulse frequency modulation (PFM) for high light load efficiency
  • Ease of use
    • Peak current mode control with internal loop compensation
    • Fixed switching frequency: 500kHz
    • Internal soft start: 5ms
    • Frequency spread spectrum to reduce EMI
    • Overcurrent protection for both MOSFETs with hiccup mode protection
    • Non-latched protection for over temperature protection (OTP), overcurrent protection (OCP), overvoltage protection (OVP), and undervoltage lockout (UVLO)
    • P2P, B2B with TPS54202
    • SOT-23 (6), SOT-563 package

The TPS54202x is a 4.5V to 30V input voltage range, 2A output, 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 TPS54202x achieves the high power density and offers a small footprint on the PCB. TPS542025 has fixed 5V output, which saves BOM by further reducing FB resistors. TPS542021 has adjustable output by a different FB resistor configuration.

The TPS54202x operates in pulse frequency modulation for higher light load efficiency and reduces the power loss. The frequency spread spectrum operation is introduced for Electromagnetic Interference (EMI) reduction.

Cycle-by-cycle current limit in both 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 present time.

The TPS54202x is a 4.5V to 30V input voltage range, 2A output, 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 TPS54202x achieves the high power density and offers a small footprint on the PCB. TPS542025 has fixed 5V output, which saves BOM by further reducing FB resistors. TPS542021 has adjustable output by a different FB resistor configuration.

The TPS54202x operates in pulse frequency modulation for higher light load efficiency and reduces the power loss. The frequency spread spectrum operation is introduced for Electromagnetic Interference (EMI) reduction.

Cycle-by-cycle current limit in both 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 present time.
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類型 標題 日期
* Data sheet TPS54202x 4.5V to 30V, 2A, EMI Friendly, Synchronous Step-Down Converter datasheet (Rev. B) PDF | HTML 2025年 12月 16日
Certificate TPS542021EVM EU Declaration of Conformity (DoC) 2024年 12月 16日

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開發板

TPS542021EVM — TPS542021 評估模組

TPS542021 評估模組 (EVM) 是一款採用 SOT236 封裝且簡單易用的 2A 同步降壓轉換器。TPS542021EVM 是完全組裝且經過測試的電路，可用於評估 TPS542021 降壓轉換器。TPS542021EVM 可在 5V 到 30V 輸入、24V 額定值範圍內運作，並在 2A 時提供 5V 輸出。EVM 也包含用於回饋迴路測量的 AC 訊號注入端子。

使用指南: PDF | HTML
TI.com 無法提供
封裝 針腳 CAD 符號、佔位空間與 3D 模型
SOT-23-THN (DDC) 6 Ultra Librarian
SOT-5X3 (DRL) 6 Ultra Librarian
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