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LM72880-Q1

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具 I2C 的車用、80V、8A 同步降壓轉換器

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LM72880-Q1

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Rating Automotive Topology Buck Iout (max) (A) 8 Vin (max) (V) 80 Vin (min) (V) 4.5 Vout (max) (V) 55 Vout (min) (V) 0.8 Features Adjustable switching frequency, Auto Mode, Automotive load dump, Enable, Fixed Output, Forced PWM, Frequency synchronization, Over Current Protection, Power good, Soft Start Fixed, Thermal shutdown, UVLO adjustable EMI features Spread Spectrum Control mode current mode Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Operating temperature range (°C) -40 to 150 Iq (typ) (µA) 6.5 Duty cycle (max) (%) 99 Type Converter
Rating Automotive Topology Buck Iout (max) (A) 8 Vin (max) (V) 80 Vin (min) (V) 4.5 Vout (max) (V) 55 Vout (min) (V) 0.8 Features Adjustable switching frequency, Auto Mode, Automotive load dump, Enable, Fixed Output, Forced PWM, Frequency synchronization, Over Current Protection, Power good, Soft Start Fixed, Thermal shutdown, UVLO adjustable EMI features Spread Spectrum Control mode current mode Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Operating temperature range (°C) -40 to 150 Iq (typ) (µA) 6.5 Duty cycle (max) (%) 99 Type Converter
VQFN (RRX) 29 36 mm² 6 x 6
  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
  • Synchronous CC-CV buck converter with I2C
    • Wide input voltage range: 4.5V to 80V
      • Meets LV148 / ISO21780 requirements
    • 1% accurate, programmable VOUT from 1V (3.3V) to 24V (48V) in 10mV (20mV) steps
    • 3% accurate, programmable ILIM(avg) from 0.5A (0.8A) to 7.5A (12A) in 50mA (80mA) steps
    • Output slew rate: 0.5mV/µs to 40mV/µs
    • Adjustable cable drop compensation
    • Output active discharge
  • Designed for pairing with TPS2674X-Q1 USB Type-C PD controllers
  • Designed for low EMI requirements
    • Facilitates CISPR 25 Class 5 compliance
    • ±8% dual-random spread spectrum with programmable modulation frequency
    • Programmable fSW: 200kHz to 2.2MHz
    • Programmable PFM or FPWM operation
  • Programmable protection features
    • UV/OV (PG) warning: ±5% or ±10%
    • OVP warning, fault: 5% to 36% in 1% steps
    • Internal hiccup-mode overcurrent protection
    • Enable, interrupt, and thermal shutdown
  • 6mm × 6mm thermally optimized, RoHS compliant, QFN-29 package with Pb-free plating
  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
  • Synchronous CC-CV buck converter with I2C
    • Wide input voltage range: 4.5V to 80V
      • Meets LV148 / ISO21780 requirements
    • 1% accurate, programmable VOUT from 1V (3.3V) to 24V (48V) in 10mV (20mV) steps
    • 3% accurate, programmable ILIM(avg) from 0.5A (0.8A) to 7.5A (12A) in 50mA (80mA) steps
    • Output slew rate: 0.5mV/µs to 40mV/µs
    • Adjustable cable drop compensation
    • Output active discharge
  • Designed for pairing with TPS2674X-Q1 USB Type-C PD controllers
  • Designed for low EMI requirements
    • Facilitates CISPR 25 Class 5 compliance
    • ±8% dual-random spread spectrum with programmable modulation frequency
    • Programmable fSW: 200kHz to 2.2MHz
    • Programmable PFM or FPWM operation
  • Programmable protection features
    • UV/OV (PG) warning: ±5% or ±10%
    • OVP warning, fault: 5% to 36% in 1% steps
    • Internal hiccup-mode overcurrent protection
    • Enable, interrupt, and thermal shutdown
  • 6mm × 6mm thermally optimized, RoHS compliant, QFN-29 package with Pb-free plating

The LM72880-Q1 is an 80V, ultra-low IQ, synchronous buck converter with constant-current constant-voltage (CC-CV) regulation and I2C interface. The device is designed to work with the TPS2674X-Q1 USB Type-C PD controllers.

The converter uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. The highly accurate CC-CV operation enables seamless transition between constant-current and constant-voltage modes. The I2C interface allows programming of output voltage in 10mV or 20mV steps, average output current limit in 50mA steps, as well as output voltage slew rate, switching frequency, soft-start slew rate, mode of operation, current loop compensation, output active discharge strength, and cable drop compensation gain.

The LM72880-Q1 also features an array of safety features including undervoltage and overvoltage protection with programmable thresholds, overcurrent protection with programmable hiccup mode, and thermal shutdown.

Additional features of the LM72880-Q1 include programmable diode emulation for lower current consumption at light-load conditions, open-drain nINT flag for fault reporting and output monitoring, precision enable input, monotonic start-up into prebiased load, integrated dual input (VIN and VOUTF) VCC supply regulator, and oversized VDDA regulator for powering external loads, such as companion USB PD controllers.

The LM72880-Q1 converter comes in a 6mm × 6mm thermally-optimized, 29-pin QFN package. The three die-attach pads (VIN, SW, and PGND) improve thermal performance and board level reliability (BLR).

The LM72880-Q1 is an 80V, ultra-low IQ, synchronous buck converter with constant-current constant-voltage (CC-CV) regulation and I2C interface. The device is designed to work with the TPS2674X-Q1 USB Type-C PD controllers.

The converter uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. The highly accurate CC-CV operation enables seamless transition between constant-current and constant-voltage modes. The I2C interface allows programming of output voltage in 10mV or 20mV steps, average output current limit in 50mA steps, as well as output voltage slew rate, switching frequency, soft-start slew rate, mode of operation, current loop compensation, output active discharge strength, and cable drop compensation gain.

The LM72880-Q1 also features an array of safety features including undervoltage and overvoltage protection with programmable thresholds, overcurrent protection with programmable hiccup mode, and thermal shutdown.

Additional features of the LM72880-Q1 include programmable diode emulation for lower current consumption at light-load conditions, open-drain nINT flag for fault reporting and output monitoring, precision enable input, monotonic start-up into prebiased load, integrated dual input (VIN and VOUTF) VCC supply regulator, and oversized VDDA regulator for powering external loads, such as companion USB PD controllers.

The LM72880-Q1 converter comes in a 6mm × 6mm thermally-optimized, 29-pin QFN package. The three die-attach pads (VIN, SW, and PGND) improve thermal performance and board level reliability (BLR).
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類型 標題 日期
* Data sheet LM72880-Q1 80V, 5A, 8A, Automotive, High-Efficiency CC-CV Buck Converter With I2C datasheet PDF | HTML 2025年 4月 16日
Certificate LM72880QEVM-400 EU Declaration of Conformity (DoC) 2025年 3月 25日

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開發板

LM72880QEVM-400 — LM72880-Q1 評估模組

LM72880-Q1 評估模組 (EVM) 是一款同步降壓 DC/DC 穩壓器，可透過 I2C 介面進行恆定電流和恆定電壓 (CC-CV) 調節。EVM 可在 24V 至 70V（在 J4 VIN 終端）的廣泛輸入電壓範圍內運作，在 CC 模式下提供最大 5A 的電流，並在 CV 模式下提供最大 20V 的電壓。平均電感器電流限制和輸出電壓的調節目標可由 I2C 編程自由運轉切換頻率也可由 I2C 編程，並且能與頻率較高或較低的外部時脈訊號同步。

使用指南: PDF | HTML
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開發板

USB2ANY — USB2ANY 介面轉接器

USB2ANY 介面轉接器是一種工具，可讓電腦透過 USB 連線控制評估模組 (EVM)。USB2ANY 支援多種常用的通訊協定介面，並提供 3.3V 與 5V 的電源供應器。

使用指南: PDF
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開發模組 (EVM) 的 GUI

LM72630-LM72650-LM72680-LM72880-GUI — GUI for LM726x0 and LM72880 to set I2C configuration registers

Graphical User Interface (GUI) to configure LM726x0 and LM72880 via I2C. You can use either the online GUI via a browser or the offline GUI.
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產品
AC/DC 和 DC/DC 轉換器 (整合式 FET)
LM72880-Q1 — 具 I2C 的車用、80V、8A 同步降壓轉換器
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計算工具

LM72XXX-DESIGN-CALC — LM726xx, LM728xx quick-start design tool

This stand-alone tool facilitates and assists with the design of a DC/DC buck regulator based on the LM72xxx. The user can expeditiously arrive at an optimized design to meet the application requirements
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產品
AC/DC 和 DC/DC 轉換器 (整合式 FET)
LM72880-Q1 — 具 I2C 的車用、80V、8A 同步降壓轉換器
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設計工具

LM72880-DESIGN — Design Resources for LM72880-Q1

Datasheet and design tools for LM72880-Q1
支援產品和硬體

支援產品和硬體

產品
AC/DC 和 DC/DC 轉換器 (整合式 FET)
LM72880-Q1 — 具 I2C 的車用、80V、8A 同步降壓轉換器
硬體開發
開發板
LM72880QEVM-400 — LM72880-Q1 評估模組
要求
參考設計

PMP23501 — 車用、24V 至 60V 輸入、雙埠 USB 電力傳輸，每埠最大 60W 參考設計

此參考設計可為汽車先進駕駛輔助系統 (ADAS)、車載資訊娛樂系統及儀錶板應用提供動力。操作範圍為 24V 至 60VDC 輸入，並著重 48VDC 電源。提供兩個 USB 電源傳輸 (PD) 輸出，可同時為個人電腦和智慧型手機充電。此設計在 48VIN 下輸出最大 60W、20V、3A 時的轉換效率為 96%。測試報告包括熱影像、跨越整個輸入範圍的操作資料，並包括四種最常見輸出電壓 (5V、9V、15V 和 20V) 之間的輸出轉換。
Test report: PDF
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VQFN (RRX) 29 Ultra Librarian
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