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LM5177

現行

具有雙向運作功能的 60-V 大範圍 VIN 同步 4 開關降壓-升壓控制器

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LM51770 現行 78V 大範圍 VIN 雙向 4 開關降壓升壓控制器 Wider input voltage, higher switching frequency, higher efficiency

LM5177

現行
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產品詳細資料

Rating Catalog Topology Buck-Boost Vin (max) (V) 60 Vin (min) (V) 2.8 Vout (max) (V) 60 Vout (min) (V) 3.3 Features Adjustable current limit, Dynamic voltage scaling, Enable, Frequency synchronization, Light-load efficiency, Load Disconnect, Power good, Spread Spectrum, Synchronous rectification, Tracking, UVLO adjustable EMI features Frequency Dithering, Spread Spectrum Duty cycle (max) (%) 100 Iq (typ) (A) 0.00006 Operating temperature range (°C) -40 to 125
Rating Catalog Topology Buck-Boost Vin (max) (V) 60 Vin (min) (V) 2.8 Vout (max) (V) 60 Vout (min) (V) 3.3 Features Adjustable current limit, Dynamic voltage scaling, Enable, Frequency synchronization, Light-load efficiency, Load Disconnect, Power good, Spread Spectrum, Synchronous rectification, Tracking, UVLO adjustable EMI features Frequency Dithering, Spread Spectrum Duty cycle (max) (%) 100 Iq (typ) (A) 0.00006 Operating temperature range (°C) -40 to 125
HTSSOP (DCP) 38 62.08 mm² (9.7 mm × 6.4 mm)
  • Wide input range from 3.5V to 60V (85V absolute maximum)
    • Minimum 2.8V when V(BIAS) > 3.5V
  • Output voltage from 3.3V to 60V
  • Low shutdown IQ of 3µA
  • Low operating IQ of 60µA
  • 3% reverse current limit accuracy for precise charging currents
  • Average input and output current monitor or limiter
  • Dynamic output voltage tracking for PWM or analog input signals
  • Power save mode (PSM) selectable for high light load efficiency
  • Two integrated high-voltage supply LDOs with automatic selection
  • 2A peak current logic level gate driver
    • Integrated bootstrap diode
    • Bootstrap overvoltage and undervoltage protection
  • Fixed frequency across all operating modes (boost, buck-boost, buck)
    • Forced PWM mode selectable
    • Switching up to 600kHz for small solution and component size
    • External clock synchronization
  • Spread spectrum operation selectable
  • Adjustable undervoltage protection
  • Hiccup overcurrent and short protection
  • Wide input range from 3.5V to 60V (85V absolute maximum)
    • Minimum 2.8V when V(BIAS) > 3.5V
  • Output voltage from 3.3V to 60V
  • Low shutdown IQ of 3µA
  • Low operating IQ of 60µA
  • 3% reverse current limit accuracy for precise charging currents
  • Average input and output current monitor or limiter
  • Dynamic output voltage tracking for PWM or analog input signals
  • Power save mode (PSM) selectable for high light load efficiency
  • Two integrated high-voltage supply LDOs with automatic selection
  • 2A peak current logic level gate driver
    • Integrated bootstrap diode
    • Bootstrap overvoltage and undervoltage protection
  • Fixed frequency across all operating modes (boost, buck-boost, buck)
    • Forced PWM mode selectable
    • Switching up to 600kHz for small solution and component size
    • External clock synchronization
  • Spread spectrum operation selectable
  • Adjustable undervoltage protection
  • Hiccup overcurrent and short protection

The LM5177 is a four switch buck-boost controller. The device provides a regulated output voltage if the input voltage is higher, equal, or lower than the adjusted output voltage. In power save mode, the device supports high efficiency with low output loads due to its low quiescence currents. The LM5177 runs at a fixed switching frequency, which can be set through the RT or SYNC pin. The switching frequency remains the same during buck, boost, and buck-boost operation. The integrated and optional average current monitor can help monitor and limit input and output current of the LM5177. This feature also supports charging backup power elements, like batteries or capacitors, with constant current (CC) and constant voltage (CV).

The LM5177 is a four switch buck-boost controller. The device provides a regulated output voltage if the input voltage is higher, equal, or lower than the adjusted output voltage. In power save mode, the device supports high efficiency with low output loads due to its low quiescence currents. The LM5177 runs at a fixed switching frequency, which can be set through the RT or SYNC pin. The switching frequency remains the same during buck, boost, and buck-boost operation. The integrated and optional average current monitor can help monitor and limit input and output current of the LM5177. This feature also supports charging backup power elements, like batteries or capacitors, with constant current (CC) and constant voltage (CV).
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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 LM5177 60V Wide VIN Bidirectional 4-Switch Buck-Boost Controller datasheet (Rev. F) PDF | HTML 2025/1/23
Application brief Current Monitoring with Positive and Negative Currents on LM5177x Devices (Rev. A) PDF | HTML 2024/11/25
應用說明 Reverse Current Operation of the LM5177 Buck-Boost Converter PDF | HTML 2024/7/16
應用說明 Parallel Operation of the Buck-Boost Converters Using LM5177 Buck-Boost Controller (Rev. A) PDF | HTML 2024/2/27
Application brief A Simple Constant Voltage Regulation Using the MODE Pin (Rev. A) PDF | HTML 2024/2/15
Application brief Precise Current Limiter Over Wide Operation Voltages in Buck-Boost Converters PDF | HTML 2023/9/5
應用說明 Layout Optimization of 4-Switch Buck-Boost Converters PDF | HTML 2023/9/5
Application brief Dynamic Current Tracking With the LM5177 4-Switch Buck Boost Controller PDF | HTML 2023/2/24
Application brief Constant Current Operation Using the Internal Current Limiter PDF | HTML 2023/1/27
證書 LM5177EVM-HP EU RoHS Declaration of Conformity (DoC) 2021/12/16

設計與開發

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開發板

LM51770EVM-HV — LM51770 降壓升壓控制器評估模組

LM51770EVM-HV 評估模組 (EVM) 展示使用 LM51770 的靈活高功率降壓升壓設計。EVM 設定為在 36V 至 48V 輸入電壓範圍內運作，並且提供最高 4A 負載電流的穩壓 48V 輸出。EVM 在切換頻率為 380kHz 下運作。此裝置的大多數設定皆可透過跨接器進行調整或設定，例如：操作模式（PSM 或 fPWM）、偏壓電源和外部時鐘同步。
使用指南: PDF | HTML
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開發板

LM5177EVM-HP — 具四開關降壓升壓控制器的 LM5177 評估模組

LM5177EVM-HP 展示使用 LM5177 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 4.2 V 至 36 V 輸入電壓範圍內運作，並提供最高 9.4 A 負載電流的穩壓 16-V 輸出。
使用指南: PDF | HTML
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計算工具

SNVR519 — LM5177 BuckBoost Quickstart Calculator Tool

LM5177 BuckBoost Quickstart Calculator Tool
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