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DC/DC 控制器

LM5176-Q1

現行

通過 AEC-Q100 驗證的 55V 寬輸入電壓同步 4 開關降壓/升壓控制器

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產品規格表

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，但針腳輸出與所比較的裝置不同。
LM51772-Q1 現行 具有 I2C 介面的車用、55V 4 交換器降壓升壓控制器 Newer features and functionality including addition of I2C interface

LM5176-Q1

現行
產品規格表 立即訂購

產品詳細資料

Rating Automotive Topology Buck-Boost Vin (max) (V) 55 Vin (min) (V) 4.2 Vout (max) (V) 55 Vout (min) (V) 0.8 Features Adjustable current limit, Enable, Frequency synchronization, Phase interleaving, Power good, Prebias startup, Spread Spectrum, Synchronous rectification, UVLO adjustable EMI features Frequency Dithering, Spread Spectrum Duty cycle (max) (%) 100 Iq (typ) (A) 0.002 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125
Rating Automotive Topology Buck-Boost Vin (max) (V) 55 Vin (min) (V) 4.2 Vout (max) (V) 55 Vout (min) (V) 0.8 Features Adjustable current limit, Enable, Frequency synchronization, Phase interleaving, Power good, Prebias startup, Spread Spectrum, Synchronous rectification, UVLO adjustable EMI features Frequency Dithering, Spread Spectrum Duty cycle (max) (%) 100 Iq (typ) (A) 0.002 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125
HTSSOP (PWP) 28 62.08 mm² (9.7 mm × 6.4 mm)
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: -40°C to 125°C TA
  • Functional Safety-Capable
  • Single inductor buck-boost controller for step-up/step-down DC/DC conversion
  • Wide VIN: 4.2 V (2.5 V with bias) to 55 V (60 V maximum)
  • Flexible VOUT: 0.8 V to 55 V
  • VOUT short protection
  • High efficiency buck-boost transition
  • Adjustable switching frequency
  • Optional frequency sync and dithering
  • Integrated 2-A MOSFET gate drivers
  • Cycle-by-cycle current limit and optional hiccup
  • Optional input or output average current limiting
  • Programmable input UVLO and soft-start
  • Power good and output overvoltage protection
  • Available in HTSSOP-28 package
  • Create a custom design using the LM5176-Q1 with the WEBENCH Power Designer
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: -40°C to 125°C TA
  • Functional Safety-Capable
  • Single inductor buck-boost controller for step-up/step-down DC/DC conversion
  • Wide VIN: 4.2 V (2.5 V with bias) to 55 V (60 V maximum)
  • Flexible VOUT: 0.8 V to 55 V
  • VOUT short protection
  • High efficiency buck-boost transition
  • Adjustable switching frequency
  • Optional frequency sync and dithering
  • Integrated 2-A MOSFET gate drivers
  • Cycle-by-cycle current limit and optional hiccup
  • Optional input or output average current limiting
  • Programmable input UVLO and soft-start
  • Power good and output overvoltage protection
  • Available in HTSSOP-28 package
  • Create a custom design using the LM5176-Q1 with the WEBENCH Power Designer

The LM5176-Q1 is a synchronous four-switch buck-boost DC/DC controller capable of regulating the output voltage at, above, or below the input voltage. The LM5176-Q1 operates over a wide input voltage range of 4.2 V to 55 V (60 V absolute maximum) to support a variety of applications.

The LM5176-Q1 employs current-mode control both in buck and boost modes of operation for superior load and line regulation. The switching frequency is programmed by an external resistor and can be synchronized to an external clock signal.

The device also features a programmable soft-start function and offers protection features including cycle-by-cycle current limiting, input undervoltage lockout (UVLO), output overvoltage protection (OVP), and thermal shutdown. In addition, the LM5176-Q1 features optional average input or output current limiting, optional spread spectrum to reduce peak EMI, and optional hiccup mode protection in sustained overload conditions.

The LM5176-Q1 is a synchronous four-switch buck-boost DC/DC controller capable of regulating the output voltage at, above, or below the input voltage. The LM5176-Q1 operates over a wide input voltage range of 4.2 V to 55 V (60 V absolute maximum) to support a variety of applications.

The LM5176-Q1 employs current-mode control both in buck and boost modes of operation for superior load and line regulation. The switching frequency is programmed by an external resistor and can be synchronized to an external clock signal.

The device also features a programmable soft-start function and offers protection features including cycle-by-cycle current limiting, input undervoltage lockout (UVLO), output overvoltage protection (OVP), and thermal shutdown. In addition, the LM5176-Q1 features optional average input or output current limiting, optional spread spectrum to reduce peak EMI, and optional hiccup mode protection in sustained overload conditions.
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技術文件

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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 LM5176-Q1 55-V Wide VIN Synchronous 4-Switch Buck-Boost Controller datasheet (Rev. B) PDF | HTML 2021/8/13
應用說明 Bidirectional TEC Driver Design for 40-W TEC PDF | HTML 2023/6/2
電子書 An Engineer’s Guide to Low EMI in DC/DC Regulators 2021/4/21
功能安全資訊 LM5176 and LM5176-Q1 Functional Safety, FIT Rate, Failure FMD 2020/5/22
應用說明 LM5176 Power Sharing Between Two Parallel, Four-Switch Buck-Boost Converters 2018/7/16
白皮書 An overview of radiated EMI specifications for power supplies 2018/6/5
白皮書 An overview of conducted EMI specifications for power supplies 2018/2/1
技術文章 Four-switch buck-boost layout tip No. 3: separating differential sense lines from PDF | HTML 2017/3/2
技術文章 Four-switch buck-boost layout tip No. 2: optimizing hot loops in the power stage PDF | HTML 2017/2/23
技術文章 Four-switch buck-boost layout tip No. 1: identifying the critical parts for layout PDF | HTML 2017/2/20

設計與開發

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開發板

LM5176EVM-HP — LM5176 寬輸入電壓降壓/升壓控制器評估模組

LM5176EVM-HP 展示使用 LM5176 wide-vin 降壓升壓控制器的靈活高功率降壓升壓設計。評估模組設定為在 6V 至 36V 輸入電壓範圍內運作，並提供最高 12A 負載電流的穩壓 12-V 輸出。
使用指南: PDF
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模擬型號

LM5176 PSpice Transient Model (Rev. C)

SNVMBA4C.ZIP (120 KB) - PSpice 模型
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計算工具

SNVC208 — LM5176 Design Calculator

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參考設計

PMP31052 — 車用四開關 > 300-W 降壓升壓參考設計

此參考設計為一使用 LM5176-Q1 控制器 IC 的汽車四開關降壓升壓轉換器電路。電源供應器可升壓及降壓輸入電壓。此設計接受 4.5 V 至 27 V 的輸入電壓，並提供 12 V 的穩壓輸出，其可依據啟動層級、啟動時間、熱介面與最高環境溫度來提供，最高可達 30 A。

此設計的目的在於將單一功率級強制轉為最大輸出電流。

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封裝 針腳 CAD 符號、佔位空間與 3D 模型
HTSSOP (PWP) 28 Ultra Librarian
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