ZHCSHU0C March   2018  – October 2021 LM51501-Q1

PRODUCTION DATA  

  1. 特性
  2. 应用
  3. 说明
  4. Revision History
  5. Device Comparison Table
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Enable (EN Pin)
      2. 8.3.2  High Voltage VCC Regulator (PVCC, AVCC Pin)
      3. 8.3.3  Power-On Voltage Selection (VSET Pin)
      4. 8.3.4  Switching Frequency (RT Pin)
      5. 8.3.5  Clock Synchronization (SYNC Pin in SS Configuration)
      6. 8.3.6  Current Sense, Slope Compensation, and PWM (CS Pin)
      7. 8.3.7  Current Limit (CS Pin)
      8. 8.3.8  Feedback and Error Amplifier (COMP Pin)
      9. 8.3.9  Automatic Wake-Up and Standby
      10. 8.3.10 Boost Status Indicator (STATUS Pin)
      11. 8.3.11 Maximum Duty Cycle Limit and Minimum Input Supply Voltage
      12. 8.3.12 MOSFET Driver (LO Pin)
      13. 8.3.13 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Shutdown Mode
      2. 8.4.2 Standby Mode
      3. 8.4.3 Wake-Up Mode
        1. 8.4.3.1 Start-Stop Configuration (SS Configuration)
        2. 8.4.3.2 Emergency-Call Configuration (EC Configuration)
  9. Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Bypass Switch / Disconnection Switch Control
      2. 9.1.2 Loop Response
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1  Custom Design With WEBENCH® Tools
        2. 9.2.2.2  RSET Resistor
        3. 9.2.2.3  RT Resistor
        4. 9.2.2.4  Inductor Selection (LM)
        5. 9.2.2.5  Current Sense (RS)
        6. 9.2.2.6  Slope Compensation Ramp (RSL)
        7. 9.2.2.7  Output Capacitor (COUT)
        8. 9.2.2.8  Loop Compensation Component Selection and Maximum ESR
        9. 9.2.2.9  PVCC Capacitor, AVCC Capacitor, and AVCC Resistor
        10. 9.2.2.10 VOUT Filter (CVOUT, RVOUT)
        11. 9.2.2.11 Input Capacitor
        12. 9.2.2.12 MOSFET Selection
        13. 9.2.2.13 Diode Selection
        14. 9.2.2.14 Efficiency Estimation
      3. 9.2.3 Application Curves
    3. 9.3 System Examples
      1. 9.3.1 Lower Standby Threshold in SS Configuration
      2. 9.3.2 Dithering Using Dither Enabled Device
      3. 9.3.3 Clock Synchronization With LM5140
      4. 9.3.4 Dynamic Frequency Change
      5. 9.3.5 Dithering Using an External Clock
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 第三方产品免责声明
      2. 12.1.2 Development Support
        1. 12.1.2.1 Custom Design With WEBENCH® Tools
    2. 12.2 接收文档更新通知
    3. 12.3 支持资源
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 术语表
  13. 13Mechanical, Packaging, and Orderable Information

封装选项

请参考 PDF 数据表获取器件具体的封装图。

机械数据 (封装 | 引脚)
  • RUM|16
散热焊盘机械数据 (封装 | 引脚)
订购信息

说明

LM51501-Q1 是一款具有宽输入电压范围的自动升压控制器。该器件可用于汽车启动期间利用车辆电池或备用电池维持稳定的输出电压。

可以通过一个电阻器在 220kHz 至 2.3MHz 范围内对 LM51501-Q1 开关频率进行编程。快速开关频率 (≥ 2.2MHz) 可更大限度地降低调幅频带干扰,并支持实现小解决方案尺寸和快速瞬态响应。

LM51501-Q1 在输入或输出电压高于预设待机阈值时以低 IQ 待机模式运行,并且在输出电压降至预设唤醒阈值以下时自动唤醒。

该器件可进入或退出低 IQ 待机模式,以在轻负载下延长电池寿命。单个电阻器对目标输出稳定电压以及配置进行编程。其他特性包括低关断电流、升压状态指示器、可调逐周期电流限制和热关断。当器件未进行升压运行时,状态指示器可用于控制电路以绕过二极管,从而降低功率耗散。在紧急呼叫模式下,该器件可用于控制断开开关,保护备用电池。

器件信息
器件型号封装(1)封装尺寸(标称值)
LM51501-Q1WQFN (16)4.00mm × 4.00mm
如需了解所有可用封装,请参阅数据表末尾的可订购产品附录。
GUID-DCB276D4-752D-4EC5-8041-D3DD3382E2F6-low.gif典型应用电路
GUID-FD670023-5085-4BDD-B991-B074EFCAD136-low.gif效率(VLOAD= 9.5V,FSW= 440kHz)