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AC/DC 和 DC/DC 轉換器 (整合式 FET)

LMQ62440-Q1

現行

車用 3-V 至 36-V、4-A、低雜訊固定頻率同步降壓轉換器

立即訂購
產品規格表

LMQ62440-Q1

現行
產品規格表 立即訂購

產品詳細資料

Rating Automotive Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 4 Vin (min) (V) 3 Vin (max) (V) 36 Switching frequency (min) (kHz) 2200 Switching frequency (max) (kHz) 2200 Features Enable, Forced PWM, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, Wettable flanks package Control mode current mode Vout (min) (V) 1 Vout (max) (V) 34 Iq (typ) (µA) 7 Duty cycle (max) (%) 98
Rating Automotive Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 4 Vin (min) (V) 3 Vin (max) (V) 36 Switching frequency (min) (kHz) 2200 Switching frequency (max) (kHz) 2200 Features Enable, Forced PWM, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, Wettable flanks package Control mode current mode Vout (min) (V) 1 Vout (max) (V) 34 Iq (typ) (µA) 7 Duty cycle (max) (%) 98
VQFN-HR (RJR) 14 14 mm² 4 x 3.5
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +150°C, TJ
  • Functional Safety-Capable
  • Optimized for ultra-low EMI requirements
    • Meets CISPR25 class 5 standard
    • Hotrod™ package minimizes switch node ringing
    • Internal bypass capacitors reduce EMI
    • Parallel input path minimizes parasitic inductance
    • Spread spectrum reduces peak emissions
    • Adjustable switch node rise time
  • Designed for rugged Automotive applications
    • Supports 42-V load dump
    • 0.4-V dropout with 4-A load (typical)
  • High efficiency power conversion at all loads
    • 7-µA no load current at 13.5 VIN, 3.3 VOUT
    • 90% PFM efficiency at 1-mA, 13.5 VIN, 5 VOUT
    • Low MOSFET ON resistance
      • RDS_ON_HS = 41 mΩ (typical)
      • RDS_ON_LS = 21 mΩ (typical)
  • External bias option for improved efficiency
  • Pin compatible with:
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +150°C, TJ
  • Functional Safety-Capable
  • Optimized for ultra-low EMI requirements
    • Meets CISPR25 class 5 standard
    • Hotrod™ package minimizes switch node ringing
    • Internal bypass capacitors reduce EMI
    • Parallel input path minimizes parasitic inductance
    • Spread spectrum reduces peak emissions
    • Adjustable switch node rise time
  • Designed for rugged Automotive applications
    • Supports 42-V load dump
    • 0.4-V dropout with 4-A load (typical)
  • High efficiency power conversion at all loads
    • 7-µA no load current at 13.5 VIN, 3.3 VOUT
    • 90% PFM efficiency at 1-mA, 13.5 VIN, 5 VOUT
    • Low MOSFET ON resistance
      • RDS_ON_HS = 41 mΩ (typical)
      • RDS_ON_LS = 21 mΩ (typical)
  • External bias option for improved efficiency
  • Pin compatible with:

The LMQ62440-Q1 is a high-performance, DC-DC synchronous buck converter with integrated bypass capacitors. With integrated high-side and low-side MOSFETs, up to 4 A of output current is delivered over a wide input range of 3.0 V to 36 V; 42-V tolerance supports load dump for durations of 400 ms. The device implements soft recovery from dropout eliminating overshoot on the output.

The device is specifically designed for minimal EMI. The device incorporates pseudo-random spread spectrum, integrated bypass capacitors, adjustable SW node rise time, low-EMI VQFN-HR package featuring low switch node ringing, and optimized pinout for ease of use. The switching frequency can be synchronized between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition the frequency can be selected for improved efficiency at low operating frequency or smaller solution size at high operating frequency.

Auto-mode enables frequency foldback when operating at light loads, allowing an unloaded current consumption of only 7 µA (typical) and high light load efficiency. Seamless transition between PWM and PFM modes, along with very low MOSFET ON resistances and an external bias input, ensures exceptional efficiency across the entire load range.

The device is available in a 14-pin VQFN-HR package with wettable flanks. Electrical characteristics are specified over a junction temperature range of –40°C to +150°C. Find additional resources in the Related Documentation.

The LMQ62440-Q1 is a high-performance, DC-DC synchronous buck converter with integrated bypass capacitors. With integrated high-side and low-side MOSFETs, up to 4 A of output current is delivered over a wide input range of 3.0 V to 36 V; 42-V tolerance supports load dump for durations of 400 ms. The device implements soft recovery from dropout eliminating overshoot on the output.

The device is specifically designed for minimal EMI. The device incorporates pseudo-random spread spectrum, integrated bypass capacitors, adjustable SW node rise time, low-EMI VQFN-HR package featuring low switch node ringing, and optimized pinout for ease of use. The switching frequency can be synchronized between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition the frequency can be selected for improved efficiency at low operating frequency or smaller solution size at high operating frequency.

Auto-mode enables frequency foldback when operating at light loads, allowing an unloaded current consumption of only 7 µA (typical) and high light load efficiency. Seamless transition between PWM and PFM modes, along with very low MOSFET ON resistances and an external bias input, ensures exceptional efficiency across the entire load range.

The device is available in a 14-pin VQFN-HR package with wettable flanks. Electrical characteristics are specified over a junction temperature range of –40°C to +150°C. Find additional resources in the Related Documentation.
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類型 標題 日期
* Data sheet LMQ62440-Q1 Automotive 3-V to 36-V, Low EMI Synchronous Step-Down Converter datasheet (Rev. A) 2020年 9月 24日
White paper 透過節省時間和成本的創新技術 降低電源中的EMI 2020年 12月 4日
User guide LMQ62440EVM 2-MHz User's Guide PDF | HTML 2020年 9月 14日
Functional safety information LMQ6x4x0-Q1 Functional Safety, FIT Rate, FMD, and Pin FMA (Rev. A) PDF | HTML 2020年 9月 9日
Certificate LMQ62440EVM-2MHz EU Declaration of Conformity (DoC) 2020年 9月 1日
Functional safety information LMQ62440-Q1 Functional Safety, FIT Rate, and Failure Mode Distribution 2020年 4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

LMQ62440EVM — 36-V、低 EMI 4-A、5-V 同步、2.1-MHz、降壓轉換器評估模組

The LMQ62440EVM evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LMQ62440 synchronous step-down converter.  The LMQ62440 provides exceptional efficiency, low Iq, and low EMI in small solution size with integrated capacitors.
使用指南: PDF | HTML
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模擬型號

LMQ62440APP-Q1 PSpice Transient Model

SNVMC42.ZIP (129 KB) - PSpice Model
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模擬型號

LMQ62440BPP-Q1 PSpice Transient Model

SNVMC44.ZIP (298 KB) - PSpice Model
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模擬型號

LMQ62440CPP-Q1 PSpice Transient Model

SNVMC43.ZIP (292 KB) - PSpice Model
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設計工具

SNVR489 — LMQ62440EVM-2MHz Design Files

支援產品和硬體

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產品
AC/DC 和 DC/DC 轉換器 (整合式 FET)
LMQ62440-Q1 — 車用 3-V 至 36-V、4-A、低雜訊固定頻率同步降壓轉換器
硬體開發
開發板
LMQ62440EVM — 36-V、低 EMI 4-A、5-V 同步、2.1-MHz、降壓轉換器評估模組
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封裝 針腳 CAD 符號、佔位空間與 3D 模型
VQFN-HR (RJR) 14 Ultra Librarian
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