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LM51770-Q1

現行

78V 大範圍 VIN 雙向 4 開關降壓升壓控制器

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產品規格表

LM51770-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) 78 Vout (max) (V) 78 Vout (min) (V) 3.3 Features 1% reference, Adjustable current limit, Adjustable soft start, Adjustable switching frequency, Advanced power saving, Bidirectional, Current monitoring, Enable, Forced PWM, Frequency synchronization, Hiccup mode protection, Light Load Efficiency Mode, Pass-through mode, Power good, Tracking, adjustable UVLO Operating temperature range (°C) -40 to 150 Duty cycle (max) (%) 100 TI functional safety category Functional Safety-Capable EMI features Frequency Dithering, Spread Spectrum
Rating Automotive Topology Buck-Boost Vin (max) (V) 78 Vout (max) (V) 78 Vout (min) (V) 3.3 Features 1% reference, Adjustable current limit, Adjustable soft start, Adjustable switching frequency, Advanced power saving, Bidirectional, Current monitoring, Enable, Forced PWM, Frequency synchronization, Hiccup mode protection, Light Load Efficiency Mode, Pass-through mode, Power good, Tracking, adjustable UVLO Operating temperature range (°C) -40 to 150 Duty cycle (max) (%) 100 TI functional safety category Functional Safety-Capable EMI features Frequency Dithering, Spread Spectrum
HTSSOP (DCP) 38 62.08 mm² 9.7 x 6.4
  • Wide input range from 3.5V to 80V (85V absolute maximum)
    • Minimum 2.8V when V(BIAS) > 3.5V
  • Output voltage from 3.3V to 78V
  • 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 with integrated bootstrap diode and bootstrap voltage protections
  • Fixed frequency across all operating modes (boost, buck-boost, buck)
    • Forced PWM mode selectable
    • Switching up to 2MHz for small solution and component size
    • External clock synchronization
  • Spread spectrum operation selectable
  • Adjustable undervoltage protection
  • Hiccup overcurrent and short protection
  • AEC-Q100 qualified for automotive applications
    • Test temperature grade 1: –40°C to +150°C
  • Functional Safety-Capable
  • Wide input range from 3.5V to 80V (85V absolute maximum)
    • Minimum 2.8V when V(BIAS) > 3.5V
  • Output voltage from 3.3V to 78V
  • 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 with integrated bootstrap diode and bootstrap voltage protections
  • Fixed frequency across all operating modes (boost, buck-boost, buck)
    • Forced PWM mode selectable
    • Switching up to 2MHz for small solution and component size
    • External clock synchronization
  • Spread spectrum operation selectable
  • Adjustable undervoltage protection
  • Hiccup overcurrent and short protection
  • AEC-Q100 qualified for automotive applications
    • Test temperature grade 1: –40°C to +150°C
  • Functional Safety-Capable

The LM51770-Q1 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. In power save mode, the device supports high efficiency close to 99% efficiency over the full range of the output current. The LM51770-Q1 runs at a fixed switching frequency, which is 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 helps monitor and limit input and output current of the LM51770-Q1. This feature also supports charging backup power elements, like batteries or capacitors, with constant current (CC) and constant voltage (CV).

The LM51770-Q1 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. In power save mode, the device supports high efficiency close to 99% efficiency over the full range of the output current. The LM51770-Q1 runs at a fixed switching frequency, which is 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 helps monitor and limit input and output current of the LM51770-Q1. This feature also supports charging backup power elements, like batteries or capacitors, with constant current (CC) and constant voltage (CV).
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類型 標題 日期
* Data sheet LM51770-Q1 80V Wide VIN Bidirectional 4-Switch Buck-Boost Controller datasheet PDF | HTML 2025年 9月 9日
Functional safety information LM51770-Q1 Functional Safety FIT Rate and FMD PDF | HTML 2025年 7月 15日
Application note Layout Optimization of 4-Switch Buck-Boost Converters PDF | HTML 2023年 9月 5日

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開發板

LM51770EVM-HV — LM51770 buck-boost controller evaluation module

The LM51770EVM-HV evaluation module (EVM) demonstrates a flexible high-power buck-boost design using the LM51770. The EVM is configured to operate from an input voltage range of 36V to 48V and produce a regulated 48V output with up to 4A load current. The EVM operates with a switching frequency of (...)
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

LM51770-QUICKSTART-CALC — LM51770 BuckBoost Quickstart Calculator Tool

LM51770 BuckBoost Quickstart Calculator Tool. This standalone tool facilitates and assists the power supply engineer with the design of a DC/DC buck-boost converter based on the LM51770.
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產品
AC/DC 和 DC/DC 控制器 (外部 FET)
LM51770 — 78V 大範圍 VIN 雙向 4 開關降壓升壓控制器 LM51770-Q1 — 78V 大範圍 VIN 雙向 4 開關降壓升壓控制器 LM517701 — 78V wide-VIN bidirectional 4-switch buck-boost controller
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開發板
LM51770EVM-HV — LM51770 buck-boost controller evaluation module
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