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LM70880

現行

高密度、4.5V 至 80V 輸入、8A 低 EMI 同步 DC/DC 降壓轉換器

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產品規格表

LM70880

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 Type Converter Iout (max) (A) 8 Vin (min) (V) 4.5 Vin (max) (V) 80 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Adjustable switching frequency, Enable, Fixed Output, Forced PWM, Frequency synchronization, Low Noise, Over Current Protection, Power good, Soft Start Fixed, Spread Spectrum, Stackable, Thermal shutdown, UVLO adjustable EMI features Spread Spectrum Control mode Current Vout (min) (V) 0.8 Vout (max) (V) 55 Iq (typ) (µA) 6.5 Duty cycle (max) (%) 99
Rating Catalog Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 8 Vin (min) (V) 4.5 Vin (max) (V) 80 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Adjustable switching frequency, Enable, Fixed Output, Forced PWM, Frequency synchronization, Low Noise, Over Current Protection, Power good, Soft Start Fixed, Spread Spectrum, Stackable, Thermal shutdown, UVLO adjustable EMI features Spread Spectrum Control mode Current Vout (min) (V) 0.8 Vout (max) (V) 55 Iq (typ) (µA) 6.5 Duty cycle (max) (%) 99
VQFN (RRX) 29 36 mm² 6 x 6
  • Functional Safety-Capable
  • Synchronous DC/DC converter with a versatile buck controller and robust power MOSFETs
    • Wide input voltage range: 4.5V to 80V
    • Shutdown mode current: 2.3µA
    • No-load IQ regulating 48V to 5V: 8.2µA
    • 1% accurate, fixed 3.3V, 5V, 12V, or adjustable outputs from 0.8V to 55V
    • Dual-phase operation enabling output currents up to 16A
  • Designed for low EMI requirements
    • Facilitates CISPR 11 Class B compliance
    • Pin-selectable ±8% dual-random spread spectrum reduces peak emissions
    • Switching frequency: 200kHz to 2.2MHz
    • Pin-configurable AUTO or FPWM operation
  • Inherent protection features for robust design
    • Internal hiccup-mode overcurrent protection
    • Enable, power good, and thermal shutdown
    • Internal or external loop compensation
  • 6mm × 6mm thermally optimized, RoHS compliant, QFN-29 package with Pb-free plating
  • Create a custom design using the LM708x0 with the WEBENCH Power Designer
  • Functional Safety-Capable
  • Synchronous DC/DC converter with a versatile buck controller and robust power MOSFETs
    • Wide input voltage range: 4.5V to 80V
    • Shutdown mode current: 2.3µA
    • No-load IQ regulating 48V to 5V: 8.2µA
    • 1% accurate, fixed 3.3V, 5V, 12V, or adjustable outputs from 0.8V to 55V
    • Dual-phase operation enabling output currents up to 16A
  • Designed for low EMI requirements
    • Facilitates CISPR 11 Class B compliance
    • Pin-selectable ±8% dual-random spread spectrum reduces peak emissions
    • Switching frequency: 200kHz to 2.2MHz
    • Pin-configurable AUTO or FPWM operation
  • Inherent protection features for robust design
    • Internal hiccup-mode overcurrent protection
    • Enable, power good, and thermal shutdown
    • Internal or external loop compensation
  • 6mm × 6mm thermally optimized, RoHS compliant, QFN-29 package with Pb-free plating
  • Create a custom design using the LM708x0 with the WEBENCH Power Designer

The LM708x0 is a family of low-IQ, wide-VIN synchronous buck converters designed for an input voltage range of 4.5V to 80V and delivering up to 8A of output current at fixed output voltages of 3.3V, 5V, 12V, or an adjustable output.

The LM708x0 uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. A pair of LM708x0 converters can be set up in an interleaved mode (paralleled outputs) with accurate current sharing for applications requiring up to 16A of output current.

The LM708x0 features a unique Dual Random Spread Spectrum (DRSS) function that combines low-frequency triangular and high-frequency cycle-by-cycle random modulations for improved EMI performance across a wide range of frequency bands.

Additional features of the LM708x0 include user-selectable diode emulation for lower current consumption at light-load conditions, open-drain Power-Good flag for fault reporting and output monitoring, precision enable input, monotonic start-up into prebiased load, integrated VCC bias supply regulator, internal 2.8ms soft-start time, and thermal shutdown protection with automatic recovery.

The LM708x0 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 LM708x0 is a family of low-IQ, wide-VIN synchronous buck converters designed for an input voltage range of 4.5V to 80V and delivering up to 8A of output current at fixed output voltages of 3.3V, 5V, 12V, or an adjustable output.

The LM708x0 uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. A pair of LM708x0 converters can be set up in an interleaved mode (paralleled outputs) with accurate current sharing for applications requiring up to 16A of output current.

The LM708x0 features a unique Dual Random Spread Spectrum (DRSS) function that combines low-frequency triangular and high-frequency cycle-by-cycle random modulations for improved EMI performance across a wide range of frequency bands.

Additional features of the LM708x0 include user-selectable diode emulation for lower current consumption at light-load conditions, open-drain Power-Good flag for fault reporting and output monitoring, precision enable input, monotonic start-up into prebiased load, integrated VCC bias supply regulator, internal 2.8ms soft-start time, and thermal shutdown protection with automatic recovery.

The LM708x0 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 LM708x0 80V, 8A/6A/4A, High-Efficiency Buck Converters Designed for High Power Density datasheet 2024年 9月 19日
Application note Controller to Converter – Design Considerations for 24V and 48V Systems PDF | HTML 2024年 10月 2日
Functional safety information LM70880, LM70860, and LM70840 Functional Safety FIT Rate, FMD, and Pin FMA PDF | HTML 2024年 9月 19日
Application note Reducing Conducted EMI in a Buck Converter for 48 V Automotive Applications PDF | HTML 2023年 12月 13日
E-book An Engineer’s Guide to Low EMI in DC/DC Regulators 2021年 4月 21日
Technical article Using DC/DCs buck converters to power modern safety features in commercial vehicle PDF | HTML 2020年 7月 27日
Technical article How to meet European Commission ADAS requirements with TI DC/DC converters PDF | HTML 2019年 5月 9日
Technical article Top three qualities to consider when designing a video doorbell power supply PDF | HTML 2018年 9月 25日
Application brief Improving RF Power Amplifier Efficiency in 5G Radio Systems 2018年 9月 5日
White paper An overview of radiated EMI specifications for power supplies 2018年 6月 5日
Technical article Effects of IC package on EMI performance PDF | HTML 2018年 5月 22日
White paper An overview of conducted EMI specifications for power supplies 2018年 2月 1日

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

LM706A0QEVM — LM706A0-Q1 評估模組

LM706A0-Q1 高密度評估模組 (EVM) 設計為使用從 8V 至 65V 的穩壓或非穩壓高電壓輸入軌，可在最高 10A 的負載電流下產生嚴格穩壓的 3.3V 輸出電壓。這款 VIN 範圍廣泛的 DC/DC 解決方案提供超大額定電壓與運作裕度，可承受供應軌電壓暫態。自由運轉切換頻率為 400kHz，並且能與頻率較高或較低的外部時脈訊號同步。為這款 EVM 選擇的動力系統被動元件符合汽車 AEC-Q200 標準，且可從多個元件廠商購買。

使用指南: PDF | HTML
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開發板

LM70880QEVM — LM70880-Q1 評估模組

LM70880QEVM 高密度評估模組設計用於使用 8V 至 72V 範圍的穩壓或非穩壓高電壓輸入軌，在負載電流高達 8A 時產生嚴格穩壓的 5V 輸出電壓。LM70880-Q1 具有高轉換效率、卓越的熱性能和先進的 EMI 抑制功能。
使用指南: PDF | HTML
TI.com 無法提供
模擬型號

LM70880 PSpice Transient model

SNVMCD7.ZIP (1399 KB) - PSpice Model
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計算工具

LM70XX0-CALC — LM70XX0 quickstart design tool calculator

Quickstart calculator for LM70XX0
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產品
AC/DC 和 DC/DC 轉換器 (整合式 FET)
LM704A0-Q1 — 車用、高密度、4.5V 至 45V 輸入、10A 低 EMI 同步 DC/DC 降壓轉換器 LM70660 — 針對高功率密度最佳化的高效率、65V、6A 降壓轉換器 LM706A0 — 高密度、4.5V 至 65V 輸入、10A 低 EMI 同步 DC/DC 降壓轉換器 LM706A0-Q1 — 車用、高密度、4.5V 至 65V 輸入、10A 低 EMI 同步 DC/DC 降壓轉換器 LM70840 — 高密度、4.5V 至 80V 輸入、4A 低 EMI 同步 DC/DC 降壓轉換器 LM70840-Q1 — 車用、高密度、4.5V 至 80V 輸入、4A 低 EMI 同步 DC/DC 降壓轉換器 LM70860 — 高密度、4.5V 至 80V 輸入、6A 低 EMI 同步 DC/DC 降壓轉換器 LM70860-Q1 — 車用、高密度、4.5V 至 80V 輸入、6A 低 EMI 同步 DC/DC 降壓轉換器 LM70880 — 高密度、4.5V 至 80V 輸入、8A 低 EMI 同步 DC/DC 降壓轉換器 LM70880-Q1 — 車用、高密度、4.5-V 至 80-V 輸入、8-A 低 EMI 同步 DC/DC 降壓轉換器
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