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AC/DC 和 DC/DC 轉換器 (整合式 FET)

LM5168

現行

具有 Fly-Buck™ 功能的 6-V 至 120-V 大範圍 VIN、300-mA DC-DC 轉換器

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產品規格表

LM5168

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck, Flybuck Type Converter Iout (max) (A) 0.3 Vin (min) (V) 6 Vin (max) (V) 120 Switching frequency (min) (kHz) 100 Switching frequency (max) (kHz) 1000 Features Enable, Forced PWM, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Fixed, Synchronous Rectification, UVLO adjustable Control mode Constant on-time (COT) Vout (min) (V) 1.2 Vout (max) (V) 48 Iq (typ) (µA) 10 Duty cycle (max) (%) 100
Rating Catalog Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck, Flybuck Type Converter Iout (max) (A) 0.3 Vin (min) (V) 6 Vin (max) (V) 120 Switching frequency (min) (kHz) 100 Switching frequency (max) (kHz) 1000 Features Enable, Forced PWM, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Fixed, Synchronous Rectification, UVLO adjustable Control mode Constant on-time (COT) Vout (min) (V) 1.2 Vout (max) (V) 48 Iq (typ) (µA) 10 Duty cycle (max) (%) 100
HSOIC (DDA) 8 29.4 mm² 4.9 x 6
  • Functional Safety-Capable
  • Designed for reliability in rugged applications
    • Wide input voltage range of 6V to 120V absolute maximum
    • Junction temperature range: –40°C to +150°C
    • Fixed 3ms internal soft-start timer
    • Peak and valley current-limit protection
    • Input UVLO and thermal shutdown protection
  • Designed for scalable industrial power supplies and battery packs
    • Low minimum on and off times of 50ns
    • Adjustable switching frequency up to 1MHz
    • Diode emulation for high light-load efficiency
    • Auto mode with low quiescent current (< 10µA)
    • FPWM for Fly-Buck converter capability
    • 3µA shutdown quiescent current
    • Pin-to-pin compatible with LM5164-Q1, LM5163-Q1, and LM5013-Q1
    • Similar pinout and functionality to LM5017 and LM34927.
  • Integration reduces design size and cost
    • COT mode control architecture
    • Integrated 1.9Ω NFET buck switch
    • Integrated 0.71Ω NFET synchronous rectifier
    • 1.2V internal voltage reference
    • No loop compensation components
    • Internal VCC bias regulator and boot diode
    • Open-drain power-good indicator
    • Package options: SOIC PowerPAD™-8 integrated circuit package or WSON-8 package
  • Functional Safety-Capable
  • Designed for reliability in rugged applications
    • Wide input voltage range of 6V to 120V absolute maximum
    • Junction temperature range: –40°C to +150°C
    • Fixed 3ms internal soft-start timer
    • Peak and valley current-limit protection
    • Input UVLO and thermal shutdown protection
  • Designed for scalable industrial power supplies and battery packs
    • Low minimum on and off times of 50ns
    • Adjustable switching frequency up to 1MHz
    • Diode emulation for high light-load efficiency
    • Auto mode with low quiescent current (< 10µA)
    • FPWM for Fly-Buck converter capability
    • 3µA shutdown quiescent current
    • Pin-to-pin compatible with LM5164-Q1, LM5163-Q1, and LM5013-Q1
    • Similar pinout and functionality to LM5017 and LM34927.
  • Integration reduces design size and cost
    • COT mode control architecture
    • Integrated 1.9Ω NFET buck switch
    • Integrated 0.71Ω NFET synchronous rectifier
    • 1.2V internal voltage reference
    • No loop compensation components
    • Internal VCC bias regulator and boot diode
    • Open-drain power-good indicator
    • Package options: SOIC PowerPAD™-8 integrated circuit package or WSON-8 package

The LM5169 and LM5168 synchronous buck converters are designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. A minimum controllable on time of 50ns facilitates large step-down conversion ratios, enabling the direct step-down from a 48V nominal input to low-voltage rails for reduced system complexity and design cost. The LM516x operates during input voltage dips as low as 6V, at nearly 100% duty cycle if needed, making the device an excellent choice for wide input supply range industrial and high cell count battery pack applications.

With integrated high-side and low-side power MOSFETs, the LM5169 delivers up to 0.65A of output current and the LM5168 delivers up to 0.3A of output current. A constant on-time (COT) control architecture provides nearly constant switching frequency with excellent load and line transient response. The LM516x is available in FPWM or auto mode versions. FPWM mode provides forced CCM operation across the entire load range supporting isolated Fly-Buck converter applications. Auto mode enables ultra-low IQ and diode emulation mode operation for high light-load efficiency.

The LM5169 and LM5168 synchronous buck converters are designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. A minimum controllable on time of 50ns facilitates large step-down conversion ratios, enabling the direct step-down from a 48V nominal input to low-voltage rails for reduced system complexity and design cost. The LM516x operates during input voltage dips as low as 6V, at nearly 100% duty cycle if needed, making the device an excellent choice for wide input supply range industrial and high cell count battery pack applications.

With integrated high-side and low-side power MOSFETs, the LM5169 delivers up to 0.65A of output current and the LM5168 delivers up to 0.3A of output current. A constant on-time (COT) control architecture provides nearly constant switching frequency with excellent load and line transient response. The LM516x is available in FPWM or auto mode versions. FPWM mode provides forced CCM operation across the entire load range supporting isolated Fly-Buck converter applications. Auto mode enables ultra-low IQ and diode emulation mode operation for high light-load efficiency.
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類型 標題 日期
* Data sheet LM516x, 0.65A/0.3A, 120V Absolute Maximum, Step-Down Converter With Fly-Buck Converter Capability datasheet (Rev. B) PDF | HTML 2024年 12月 16日
Functional safety information LM5168 and LM5169 Functional Safety FIT Rate, FMD and Pin FMA (Rev. A) PDF | HTML 2024年 11月 11日
Application note Inverting Buck-Boost Application for the LM5168 PDF | HTML 2023年 2月 24日
Application note Design Considerations of Stacked BQ769x2 With High-Side N-MOSFET PDF | HTML 2023年 2月 9日
Functional safety information LM516x-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. A) PDF | HTML 2022年 9月 1日
More literature LM5168PEVM EU RoHS Declaration of Conformity (DoC) 2022年 8月 4日
EVM User's guide LM5168PEVM EVM User's Guide PDF | HTML 2022年 8月 2日
User guide LM5168FEVM EVM User's Guide PDF | HTML 2021年 11月 18日
Certificate LM5168FEVM EU RoHS Declaration of Conformity (DoC) 2021年 10月 20日

設計與開發

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開發板

LM5168FEVM — LM5168 評估模組，115-V fly-buck 穩壓器

LM5168FEVM 評估模組 (EVM) 是完全組裝且經過測試的電路，適用於評估 LM5168，而這是一款採用同步整流的 115-V DC/DC Fly-Buck 穩壓器，可在小型元件封裝中實現高轉換效率。EVM 可在 20 V 至 115 V (最大 120-V) 的廣泛輸入電壓範圍內運作，並在高達 0.25 A 下以 750-kHz 切換頻率提供調節的 10-V 輸出。透過返馳拓撲提供額外的 10-V 浮動輸出。輸出電壓的設定點準確度高於 1.5%，並可使用外部電阻分壓器進行調節。此模組設計採用 LM5168-Q1 (...)
使用指南: PDF | HTML
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開發板

LM5168PEVM — LM5168P 115-V DC/DC 降壓穩壓器評估模組

LM5168P 評估模組 (EVM) 是採用同步整流的 115-V DC/DC 降壓穩壓器，可在較小型元件封裝中實現高轉換效率。EVM 可在 20 V 至 115 V (最大 120 V) 的廣泛輸入電壓範圍內運作，並在高達 0.3 A 下以 500 kHz 切換頻率提供調節的 12 V 輸出。輸出電壓的設定點準確度高於 1.5%，並可使用外部電阻分壓器進行調節。此模組設計採用 LM5168P 同步降壓轉換器，具備廣泛輸入電壓範圍、廣泛工作週期範圍、整合式高壓側與低壓側電源 MOSFET、先進過電流防護與精密啟用。

使用指南: PDF | HTML
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模擬型號

LM5168F PSpice Unencrypted Transient Model

SNVMCA0.ZIP (262 KB) - PSpice Model
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CAD/CAE 符號

LM5168FEVM Altium Design Files

SNVR517.ZIP (18313 KB)
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計算工具

SNVR520 — LM5169 Quick Start Calculator

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產品
AC/DC 和 DC/DC 轉換器 (整合式 FET)
LM5168 — 具有 Fly-Buck™ 功能的 6-V 至 120-V 大範圍 VIN、300-mA DC-DC 轉換器 LM5168-Q1 — 具有 Fly-Buck™ 功能的車用 6-V 至 120-V 大範圍 VIN、300-mA DC-DC 轉換器 LM5169 — 具有 Fly-Buck™ 功能的 6V 至 120V 寬 VIN、650-mA DC/DC 轉換器
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參考設計

TIDA-010247 — High-accuracy battery management unit reference design for 48–1500V energy storage system

This reference design is a high-side, N-channel MOSFET control (up to 32s) battery management unit (BMU), using the stacked BQ769x2 battery monitor family. This design also integrates a CAN interface for BMU stacking high-voltage (up to 1500V) energy storage station applications. High-side, (...)
Design guide: PDF
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