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  • LM5163-Q1 具有超低 IQ 的 100V 输入、0.5A 同步直流/直流降压转换器

    • ZHCSJY6A June   2019  – April 2024 LM5163-Q1

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  • LM5163-Q1 具有超低 IQ 的 100V 输入、0.5A 同步直流/直流降压转换器
  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1  Control Architecture
      2. 6.3.2  Internal VCC Regulator and Bootstrap Capacitor
      3. 6.3.3  Regulation Comparator
      4. 6.3.4  Internal Soft Start
      5. 6.3.5  On-Time Generator
      6. 6.3.6  Current Limit
      7. 6.3.7  N-Channel Buck Switch and Driver
      8. 6.3.8  Synchronous Rectifier
      9. 6.3.9  Enable/Undervoltage Lockout (EN/UVLO)
      10. 6.3.10 Power Good (PGOOD)
      11. 6.3.11 Thermal Protection
    4. 6.4 Device Functional Modes
      1. 6.4.1 Shutdown Mode
      2. 6.4.2 Active Mode
      3. 6.4.3 Sleep Mode
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Custom Design With WEBENCH® Tools
        2. 7.2.2.2 Switching Frequency (RRON)
        3. 7.2.2.3 Buck Inductor (LO)
        4. 7.2.2.4 Output Capacitor (COUT)
        5. 7.2.2.5 Input Capacitor (CIN)
        6. 7.2.2.6 Type-3 Ripple Network
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
        1. 7.4.1.1 Compact PCB Layout for EMI Reduction
        2. 7.4.1.2 Feedback Resistors
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 第三方产品免责声明
      2. 8.1.2 Development Support
        1. 8.1.2.1 Custom Design With WEBENCH® Tools
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 接收文档更新通知
    4. 8.4 支持资源
    5. 8.5 Trademarks
    6. 8.6 静电放电警告
    7. 8.7 术语表
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information
  12. 重要声明
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Data Sheet

LM5163-Q1 具有超低 IQ 的 100V 输入、0.5A 同步直流/直流降压转换器

本资源的原文使用英文撰写。 为方便起见，TI 提供了译文；由于翻译过程中可能使用了自动化工具，TI 不保证译文的准确性。 为确认准确性，请务必访问 ti.com 参考最新的英文版本（控制文档）。

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1 特性

  • 符合面向汽车应用的 AEC-Q100 标准
    • 器件温度等级 1：–40°C 至 +125°C 的环境温度范围
  • 专为可靠耐用的应用而设计
    • 6V 至 100V 的宽输入电压范围
    • 结温范围：‌–40°C 至 +150°C
    • 固定 3ms 内部软启动计时器
    • 峰值和谷值电流限制保护
    • 输入 UVLO 和热关断保护
  • 针对超低 EMI 要求进行了优化
  • 适用于可扩展的汽车电源
    • 最短导通时间和关闭时间低：50ns
    • 高达 1MHz 的可调节开关频率
    • 可实现高轻负载效率的二极管仿真
    • 10.5µA 空载输入静态电流
    • 3µA 关断静态电流
  • 通过集成技术减小设计尺寸，降低成本
    • COT 模式控制架构
    • 集成式 0.725Ω NFET 降压开关
    • 集成式 0.34Ω NFET 同步整流器省去了外部肖特基二极管
    • 1.2V 内部电压基准
    • 无环路补偿组件
    • 内部 VCC 偏置稳压器和自举二极管
  • 使用 WEBENCH® Power Designer 创建定制稳压器设计

2 应用

  • 汽车类 48V 轻混合动力 ECU 辅助电源
  • 汽车直流/直流转换器
  • 汽车 HVAC 压缩机和 PTC 加热器

3 说明

LM5163-Q1 同步降压转换器用于在宽输入电压范围内进行调节，从而最大限度地减少对外部浪涌抑制组件的需求。50ns 的最短可控导通时间有助于实现较大的降压比，支持从 48V 标称输入到低电压轨的直接降压转换，从而降低系统的复杂性并减少解决方案成本。LM5163-Q1 在输入电压突降至 6V 时，能够根据需要以接近 100% 的占空比工作，因此非常适合高性能 48V 电池汽车应用和 MHEV/EV 系统。

LM5163-Q1 具有集成式高侧和低侧功率 MOSFET，可提供高达 0.5A 的输出电流。恒定导通时间 (COT) 控制架构可提供几乎恒定的开关频率，具有出色的负载和线路瞬态响应。LM5163-Q1 的其他特性包括超低 IQ 和二极管仿真模式运行（可实现高轻负载效率）、创新的峰值和谷值过流保护、集成式 VCC 辅助电源和自举二极管、精密使能和输入 UVLO 以及具有自动恢复功能的热关断保护。开漏 PGOOD 指示器提供时序控制、故障报告和输出电压监视功能。

LM5163-Q1 符合汽车 AEC-Q100 1 级标准并采用 8 引脚 SO PowerPAD™ 封装。该器件的 1.27mm 引脚间距可以为高电压应用提供足够的间距。

封装信息
器件型号 封装(1) 封装尺寸(2)
LM5163-Q1 DDA（SO PowerPAD，8） 4.9mm x 6mm
(1) 有关更多信息，请参阅节 10。
(2) 封装尺寸（长 × 宽）为标称值，并包括引脚（如适用）。
LM5163-Q1 典型应用典型应用
LM5163-Q1 典型应用效率，VOUT = 12V典型应用效率，VOUT = 12V

4 Pin Configuration and Functions

LM5163-Q1 DDA Package8-Pin SO PowerPAD™Top View Figure 4-1 DDA Package8-Pin SO PowerPAD™Top View
Table 4-1 Pin Functions
PIN TYPE(1) DESCRIPTION
NO. NAME
1 GND G Ground connection for internal circuits
2 VIN P/I Regulator supply input pin to high-side power MOSFET and internal bias regulator. Connect directly to the input supply of the buck converter with short, low impedance paths.
3 EN/UVLO I Precision enable and undervoltage lockout (UVLO) programming pin. If the EN/UVLO voltage is below 1.1 V, the converter is in shutdown mode with all functions disabled. If the UVLO voltage is greater than 1.1 V and below 1.5 V, the converter is in standby mode with the internal VCC regulator operational and no switching. If the EN/UVLO voltage is above 1.5 V, the start-up sequence begins.
4 RON I On-time programming pin. A resistor between this pin and GND sets the buck switch on-time.
5 FB I Feedback input of voltage regulation comparator
6 PGOOD O Power good indicator. This pin is an open-drain output pin. Connect to a source voltage through an external pullup resistor between 10 kΩ to 100 kΩ.
7 BST P/I Bootstrap gate-drive supply. Required to connect a high-quality 2.2-nF 50-V X7R ceramic capacitor between BST and SW to bias the internal high-side gate driver.
8 SW P Switching node that is internally connected to the source of the high-side NMOS buck switch and the drain of the low-side NMOS synchronous rectifier. Connect to the switching node of the power inductor.
— EP — Exposed pad of the package. No internal electrical connection. Solder the EP to the GND pin and connect to a large copper plane to reduce thermal resistance.
(1) G = Ground, I = Input, O = Output, P = Power

5 Specifications

5.1 Absolute Maximum Ratings

Over the recommended operating junction temperature range of –40°C to +150°C (unless otherwise noted)(1)
MINMAXUNIT
Input voltageVIN to GND–0.3100V
EN to GND–0.3100
FB to GND–0.35.5
RON to GND–0.35.5
Bootstrap capacitorExternal BST to SW capacitance1.52.5nF
Output voltageBST to GND–0.3105.5V
BST to SW–0.35.5
SW to GND–1.5100
SW to GND (20-ns transient)–3
PGOOD to GND–0.314
Operating junction temperature, TJ–40150°C
Storage temperature, Tstg–65150°C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

 
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