TPS54308

現行

4.5-V 至 28-V 輸入、3-A 輸出、同步 350-kHz FCCM 降壓轉換器

現在提供此產品的更新版本

open-in-new 比較替代產品
功能相同,但引腳輸出與所比較的產品不同
TPS62933 現行 採用 SOT-583 封裝的 3.8-V 至 30-V、3-A、200-kHz 至 2.2-MHz、低 IQ 同步降壓轉換器 30 VIN with higher frequency and lower IQ.

產品詳細資料

Iout (max) (A) 3 Vin (min) (V) 4.5 Vin (max) (V) 28 Topology Buck Type Converter Switching frequency (min) (kHz) 350 Switching frequency (max) (kHz) 350 Features Enable, Forced PWM, Pre-Bias Start-Up, Soft Start Fixed, Synchronous Rectification, UVLO adjustable Control mode current mode Vout (min) (V) 1 Vout (max) (V) 26 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0003
Iout (max) (A) 3 Vin (min) (V) 4.5 Vin (max) (V) 28 Topology Buck Type Converter Switching frequency (min) (kHz) 350 Switching frequency (max) (kHz) 350 Features Enable, Forced PWM, Pre-Bias Start-Up, Soft Start Fixed, Synchronous Rectification, UVLO adjustable Control mode current mode Vout (min) (V) 1 Vout (max) (V) 26 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0003
SOT-23-THN (DDC) 6 8.12 mm² 2.9 x 2.8
  • 4.5-V to 28-V wide input voltage range
  • Integrated 85-mΩ and 40-mΩ MOSFETs for 3-A, continuous output current
  • Low 2-µA shutdown, 300-µA quiescent current
  • Internal 5-mS soft start
  • Fixed 350-kHz switching frequency
  • Peak current mode control
  • Internal loop compensation
  • Overcurrent protection for both MOSFETs with hiccup mode protection
  • Overvoltage protection
  • Thermal shutdown
  • SOT-23 (6) package
  • Create a custom design using the TPS54308 with the WEBENCH Power Designer
  • 4.5-V to 28-V wide input voltage range
  • Integrated 85-mΩ and 40-mΩ MOSFETs for 3-A, continuous output current
  • Low 2-µA shutdown, 300-µA quiescent current
  • Internal 5-mS soft start
  • Fixed 350-kHz switching frequency
  • Peak current mode control
  • Internal loop compensation
  • Overcurrent protection for both MOSFETs with hiccup mode protection
  • Overvoltage protection
  • Thermal shutdown
  • SOT-23 (6) package
  • Create a custom design using the TPS54308 with the WEBENCH Power Designer

The TPS54308 is a 4.5-V to 28-V input voltage range, 3-A synchronous buck converter. The device includes two integrated switching FETs, internal loop compensation, and 5-ms internal soft start to reduce component count.

By integrating the MOSFETs and employing the SOT-23 package, the TPS54308 achieves high power density and offers a small footprint on the PCB.

The TPS54308 operates in force continuous conduction mode (FCCM) during light load conditions. The switching frequency is maintained at an almost constant level over entire load range.

Cycle-by-cycle current limit in both high-side MOSFETs 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 TPS54308 is a 4.5-V to 28-V input voltage range, 3-A synchronous buck converter. The device includes two integrated switching FETs, internal loop compensation, and 5-ms internal soft start to reduce component count.

By integrating the MOSFETs and employing the SOT-23 package, the TPS54308 achieves high power density and offers a small footprint on the PCB.

The TPS54308 operates in force continuous conduction mode (FCCM) during light load conditions. The switching frequency is maintained at an almost constant level over entire load range.

Cycle-by-cycle current limit in both high-side MOSFETs 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 TPS54308 4.5-V to 28-V Input, 3-A Output, Synchronous 350-kHz FCCM Step-Down Converter in SOT23 Package datasheet (Rev. A) PDF | HTML 2021年 4月 16日
Application note Peak Current Mode Converter Secondary Stage Filter Design for Low Ripple Power – Part I: Filter Design for Out PDF | HTML 2024年 2月 27日
Application note Peak Current Mode Converter Secondary Stage Filter Design for Low Ripple Power – Part II: Hybrid Sense Network PDF | HTML 2024年 2月 27日
Selection guide Buck Converter Quick Reference Guide (Rev. B) 2021年 4月 8日
Application note Designing a Simple and Low-Cost Flybuck Solution With the TPS54308 (Rev. A) 2019年 10月 14日
Application note Using the TPS54x02 to Create an Inverting Power Supply 2018年 6月 15日
EVM User's guide TPS54308EVM-876 3-A Regulator Evaluation Module 2017年 5月 30日

設計與開發

如需其他條款或必要資源,請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

TPS54308EVM-876 — TPS54308 4.5V 至 28V 輸入、3A 輸出同步降壓轉換器評估模組

The TPS54308 DC/DC converter is designed to provide up to a 3-A output from an input voltage source of 8 V to 28 V.  In order to aviod swtiching frequency drop into audio and introduce the audible issue under light load, the TPS54308 operates under force PWRM mode.

Th (...)
使用指南: PDF
TI.com 無法提供
模擬型號

TPS54308 Unencrypted PSpice Transient Model Package (Rev. C)

SLUM585C.ZIP (798 KB) - PSpice Model
計算工具

SLUC685 TPS54308 Design Calculator

支援產品和硬體

支援產品和硬體

產品
AC/DC & DC/DC converters (integrated FET)
TPS54308 4.5-V 至 28-V 輸入、3-A 輸出、同步 350-kHz FCCM 降壓轉換器
參考設計

TIDA-010216 — 適合大容量應用且具低壓側 MOSFET 控制的 16s 電池組參考設計

此參考設計為低待機與運送模式電流消耗,以及高電池電壓準確度 16s 鋰離子 (Li-ion) LiFePO4 電池組。此設計以高準確度監控各電池芯電壓、封裝電流、電池芯和 MOSFET 溫度,並保護鋰離子和 LiFePO4 電池組、防止電池芯過電壓、電池芯欠電壓、過熱、充電和放電過電流和放電短路狀況。五對低側 N 通道 MOSFET 架構結合強大的開啟和關閉功能,讓設計能夠承受更大的充電和放電電流。透過有效的輔助電源供應策略,此參考設計可實現 100-μA 待機與 10-μA 運送模式耗電量,不僅節省更多能源,還可延長運送時間及待機時間。這些功能使此參考設計適用於電信和伺服器的電池備援單元 (...)
Design guide: PDF
參考設計

PMP40994 — 適用於 IGBT 且具有 1500-V 隔離的 4-W 雙通道絕緣式閘極驅動器參考設計

本參考設計為精巧的雙通道輸出絕緣式閘極驅動器基板設計,適合太陽能逆變器、PCS、UPS 及馬達驅動器應用的絕緣式閘極雙極電晶體 (IGBT)。隔離式偏壓電源是以採用 TPS54308 的 Fly-Buck 拓撲實作,可提供具 1500-V 隔離的雙通道隔離輸出,同時實現優異的電壓調節。此設計是單層 PCB 基板,易於製造。
Test report: PDF
參考設計

PMP40589 — 用於單路 IGBT 驅動器參考設計的 2-W 輔助電源供應器

This reference design is a dual-output, isolated fly-buck power module for a single IGBT driver bias using the TPS54308 synchronous buck converter. The converter generates one non-isolated output of +3.3 V with 400-mA current capability and two isolated outputs of +15 V and -8 V with 80-mA current (...)
Test report: PDF
電路圖: PDF
封裝 引腳 下載
SOT-23-THN (DDC) 6 檢視選項

訂購與品質

內含資訊:
  • RoHS
  • REACH
  • 產品標記
  • 鉛塗層/球物料
  • MSL 等級/回焊峰值
  • MTBF/FIT 估算值
  • 材料內容
  • 資格摘要
  • 進行中可靠性監測
內含資訊:
  • 晶圓廠位置
  • 組裝地點

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