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DC/DC 轉換器

LM61495

現行

針對功率密度和低 EMI 進行最佳化的 10-A 降壓轉換器

立即訂購
產品規格表

LM61495

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Buck Iout (max) (A) 10 Vin (max) (V) 36 Vin (min) (V) 3 Vout (max) (V) 34.2 Vout (min) (V) 1 Features Enable, Fixed soft start, Forced PWM, Frequency synchronization, Light-load efficiency, Overcurrent protection, Power good, Spread Spectrum, Synchronous rectification, UVLO fixed, Wettable flanks package EMI features Low parasitic Hotrod packaging, Spread Spectrum Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000005 Duty cycle (max) (%) 98 TI functional safety category Functional Safety-Capable
Rating Catalog Topology Buck Iout (max) (A) 10 Vin (max) (V) 36 Vin (min) (V) 3 Vout (max) (V) 34.2 Vout (min) (V) 1 Features Enable, Fixed soft start, Forced PWM, Frequency synchronization, Light-load efficiency, Overcurrent protection, Power good, Spread Spectrum, Synchronous rectification, UVLO fixed, Wettable flanks package EMI features Low parasitic Hotrod packaging, Spread Spectrum Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000005 Duty cycle (max) (%) 98 TI functional safety category Functional Safety-Capable
VQFN-HR (RPH) 16 15.75 mm² (4.5 mm × 3.5 mm)
  • Functional Safety-Capable
  • Input voltage range from 3 V to 36 V
  • RESET output with filter and delayed release
  • Designed for low EMI:
    • CISPR 11/32 class B compliant EVM
    • Pin-configurable spread spectrum
    • Adjustable SW node rise time
    • Above and below AM band operation: pin configurable at fixed 400 kHz and 2.2 MHz or adjustable from 200 kHz – 2.2 MHz
    • Low EMI symmetrical pinout
    • Light load mode is pin-configurable for constant frequency or pulse frequency modulation (PFM)
  • High-efficiency solution
    • 95% efficient for an 8-A load
    • 5-µA input current while unloaded in auto mode
    • <1-µA shutdown current (typical)
  • High power density
    • Built-in compensation, soft start, current limit, thermal shutdown, and UVLO
    • 4.5-mm × 3.5-mm wettable flank QFN package
  • Functional Safety-Capable
  • Input voltage range from 3 V to 36 V
  • RESET output with filter and delayed release
  • Designed for low EMI:
    • CISPR 11/32 class B compliant EVM
    • Pin-configurable spread spectrum
    • Adjustable SW node rise time
    • Above and below AM band operation: pin configurable at fixed 400 kHz and 2.2 MHz or adjustable from 200 kHz – 2.2 MHz
    • Low EMI symmetrical pinout
    • Light load mode is pin-configurable for constant frequency or pulse frequency modulation (PFM)
  • High-efficiency solution
    • 95% efficient for an 8-A load
    • 5-µA input current while unloaded in auto mode
    • <1-µA shutdown current (typical)
  • High power density
    • Built-in compensation, soft start, current limit, thermal shutdown, and UVLO
    • 4.5-mm × 3.5-mm wettable flank QFN package

The LM6x4xx family of buck regulators are regulators that provide either fixed or adjustable output voltage that can be set from 1 V to 95% of expected input voltage. These regulators operate under a wide input voltage range or 3 V to 36 V and have transient tolerance up to 42 V.

The family is designed for low EMI. The devices incorporate pin-selectable spread spectrum and an adjustable SW node rise time. Dual Random Spread Spectrum (DRSS) frequency hopping is set to ±5.5% (typical), drastically reducing peak emissions through a combination of triangular and pseudo random modulation. DRSS also includes advanced techniques to reduce output voltage ripple caused by spread spectrum modulation.

An open-drain RESET output with filtering and delayed release gives a true indication of system status. In auto mode, the device automatically transitions between fixed-frequency pulse width modulation (FPWM) and pulse frequency modulation (PFM) modes of operation, allowing an unloaded current consumption of only 5 µA (typical). Electrical characteristics are specified over a junction temperature range of –40°C to +150°C.

The LM6x4xx family of buck regulators are regulators that provide either fixed or adjustable output voltage that can be set from 1 V to 95% of expected input voltage. These regulators operate under a wide input voltage range or 3 V to 36 V and have transient tolerance up to 42 V.

The family is designed for low EMI. The devices incorporate pin-selectable spread spectrum and an adjustable SW node rise time. Dual Random Spread Spectrum (DRSS) frequency hopping is set to ±5.5% (typical), drastically reducing peak emissions through a combination of triangular and pseudo random modulation. DRSS also includes advanced techniques to reduce output voltage ripple caused by spread spectrum modulation.

An open-drain RESET output with filtering and delayed release gives a true indication of system status. In auto mode, the device automatically transitions between fixed-frequency pulse width modulation (FPWM) and pulse frequency modulation (PFM) modes of operation, allowing an unloaded current consumption of only 5 µA (typical). Electrical characteristics are specified over a junction temperature range of –40°C to +150°C.
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技術文件

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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 LM62460, LM61480, and LM61495 Pin-Compatible 6-A/8-A/10-A Buck Converter Optimized for Power Density and Low EMI datasheet (Rev. A) PDF | HTML 2021/11/19
應用說明 Design Guide for Inverting Buck-Boost for OLED Panel Applications Using LM61495 PDF | HTML 2024/9/16
應用說明 How to Implement a Simple Constant Current Regulation Scheme to a PCM Based Buck PDF | HTML 2023/8/16
應用說明 Using the LM61460-Q1 and LM61495-Q1 in USB Type-C Applications PDF | HTML 2021/12/15
更多文件說明 Advanced power-converter features to reduce EMI PPT 2021/12/2
功能安全資訊 LM6xxxx Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 2021/3/24
證書 LM61495RPHEVM EU RoHS Declaration of Conformity (DoC) 2021/2/16

設計與開發

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模擬型號

LM61495 PSpice Transient Model

SNVMC87.ZIP (194 KB) - PSpice 模型
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參考設計

PMP23333 — 適用於通訊設備的同步反相降壓升壓轉換器參考設計

此參考設計使用 LM61495 同步降壓穩壓器和內部上和下場效應電晶體 (FET)，可配置為同步反相降壓升壓轉換器。它會產生 -8 V 輸出，能夠從 +12-V +/-10% 輸入向負載提供 2.7-A 連續 (4-A 峰值) 電流。此設計建立在 PMP23241 印刷電路板上，這是一個含一盎司銅的四層電路板。電路板尺寸為 76.2mm x 68.6mm。解決方案尺寸約為 17.0mm x 30.5mm，不包含輸入大型電容器 C1。如有任何安全顧慮，請參閱 LM61495 功能安全失效率、故障模式分配和接腳故障模式分析。
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封裝 針腳 CAD 符號、佔位空間與 3D 模型
VQFN-HR (RPH) 16 Ultra Librarian
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