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  • LMR36015 4.2V 至 60V、1.5A 超小型同步降压转换器

    • ZHCSI00D April   2018  – September 2020 LMR36015

      PRODUCTION DATA  

  • CONTENTS
  • SEARCH
  • LMR36015 4.2V 至 60V、1.5A 超小型同步降压转换器
  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 说明（续）
  6. 6 Device Comparison Table
  7. 7 Pin Configuration and Functions
    1.     Pin Functions
  8. 8 Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 ESD Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
    6. 8.6 Timing Requirements
    7. 8.7 System Characteristics
    8. 8.8 Typical Characteristics
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Power-Good Flag Output
      2. 9.3.2 Enable and Start-up
      3. 9.3.3 Current Limit and Short Circuit
      4. 9.3.4 Undervoltage Lockout and Thermal Shutdown
    4. 9.4 Device Functional Modes
      1. 9.4.1 Auto Mode
      2. 9.4.2 Forced PWM Operation
      3. 9.4.3 Dropout
      4. 9.4.4 Minimum Switch On-Time
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design 1: Low Power 24-V, 1.5-A PFM Converter
        1. 10.2.1.1 Design Requirements
        2. 10.2.1.2 Detailed Design Procedure
          1. 10.2.1.2.1  Custom Design With WEBENCH Tools
          2. 10.2.1.2.2  Choosing the Switching Frequency
          3. 10.2.1.2.3  Setting the Output Voltage
          4. 10.2.1.2.4  Inductor Selection
          5. 10.2.1.2.5  Output Capacitor Selection
          6. 10.2.1.2.6  Input Capacitor Selection
          7. 10.2.1.2.7  CBOOT
          8. 10.2.1.2.8  VCC
          9. 10.2.1.2.9  CFF Selection
            1. 10.2.1.2.9.1 External UVLO
          10. 10.2.1.2.10 Maximum Ambient Temperature
      2. 10.2.2 Application Curves
      3. 10.2.3 Design 2: High Density 24-V, 1.5-A FPWM Converter
        1. 10.2.3.1 Design Requirements
        2. 10.2.3.2 Detailed Design Procedure
        3. 10.2.3.3 Application Curves
    3. 10.3 What to Do and What Not to Do
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
      1. 12.1.1 Ground and Thermal Considerations
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Device Support
      1. 13.1.1 Development Support
        1. 13.1.1.1 Custom Design With WEBENCH® Tools
    2. 13.2 Documentation Support
      1. 13.2.1 Related Documentation
    3. 13.3 接收文档更新通知
    4. 13.4 支持资源
    5. 13.5 Trademarks
    6. 13.6 静电放电警告
    7. 13.7 术语表
  14. 14Mechanical, Packaging, and Orderable Information
  15. 重要声明
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DATA SHEET

LMR36015 4.2V 至 60V、1.5A 超小型同步降压转换器

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）。

1 特性

  • 提供功能安全
    • 可帮助进行功能安全系统设计的文档
  • 专为可靠耐用的应用而设计
    • 高达 66V 的输入瞬态保护
    • 结温范围为 –40°C 至 +150°C
    • 在 1.5A 负载下具有 0.4V 压降（典型值）
  • 适合可扩展的工业电源
    • 与以下器件引脚兼容：
      • LMR36006（60V、0.6A ）
      • LMR33620/LMR33630（36V、2A 或 3A）
    • 400kHz、1MHz 频率选项
  • 在整个负载范围内具有低功率耗散
    • 在 400kHz 下效率为 90%（24VIN、5VOUT、1A）
    • 在 400kHz 下效率为 93%（12VIN、5VOUT、1A）
    • 在 PFM 模式中提高了轻负载效率
    • 低至 26µA 的工作静态电流
  • 小型 2mm × 3mm HotRod™ 封装
  • 解决方案只需很少的外部组件
  • LMR36006-Q1 和 LMR36015-Q1 具有 400kHz 和 2.1MHz 频率、可调节输出和 3.3V 固定输出电压
  • 针对超低 EMI 要求进行了优化
    • 符合 CISPR25 5 类标准
    • Hotrod™ 封装可更大限度地减少开关节点振铃
    • 并行输入路径可更大限度减少寄生电感
    • 展频可降低峰值发射
  • 使用 LMR36015 并借助 WEBENCH® Power Designer 创建定制设计方案

2 应用

  • 现场发送器和传感器、PLC 模块
  • 恒温器、视频监控、HVAC 系统
  • 交流和伺服驱动器、旋转编码器
  • 工业运输、资产跟踪

3 说明

LMR36015 稳压器是一款易于使用的同步降压直流/直流转换器。该器件具有集成式高侧和低侧功率 MOSFET，能够提供高达 1.5A 的输出电流（在 4.2V 至 60V 的宽输入电压范围内）。容差高达 66V。这种瞬态容差降低了防止过压所需的设计工作量，并满足 IEC 61000-4-5 的浪涌抗扰度要求。

LMR36015 采用峰值电流模式控制机制来提供最佳的效率和输出电压精度。利用 1MHz 稳压器中的 FPWM 功能可以改善负载瞬态性能。精密使能支持直接连接到宽输入电压或对器件启动和关断进行精确控制，因此提供了灵活性。附带内置滤波和延迟功能的电源正常状态标志可提供系统状态的真实指示，免去了使用外部监控器的麻烦。

器件信息
器件型号 封装(1) 封装尺寸（标称值）
LMR36015 VQFN-HR (12) 2.00mm x 3.00mm
(1) 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-20200813-CA0I-NQ3P-ZJ0R-LD7MLCTNJZ8N-low.jpg
VOUT = 5V 400kHz
效率
GUID-ED020F70-5FA6-44F8-AB26-1B50CDB8DAC0-low.gif简化版原理图

4 Revision History

Changes from Revision C (October 2019) to Revision D (September 2020)

  • 向 Section 1 添加了功能安全要点Go
  • 替换了首页图Go
  • 更新了整个文档中的表格、图和交叉参考的编号格式。Go
  • Replaced Figure 10-4 Go

Changes from Revision B (February 2019) to Revision C (October 2019)

  • 向Section 1添加了 EMI 说明Go
  • Added Figure 10-4 through Figure 10-27 Go

Changes from Revision A (November 2018) to Revision B (February 2019)

  • Added Updated package quantities in Device Comparison Table.Go

Changes from Revision * (April 2018) to Revision A (November 2018)

  • 首次发布量产数据数据表Go

5 说明（续）

LMR36015 采用 HotRod 封装，实现了低噪声、更高的效率和最小的封装裸片比率。此器件需要极少外部组件，并且具有可简化 PCB 布局的引脚排列方式。LMR36015 的小解决方案尺寸和功能集旨在简化对各种终端设备的部署，这些终端设备包括超小型现场发送器和视觉传感器等空间关键型应用。

6 Device Comparison Table

ORDERABLE PART NUMBER OUTPUT VOLTAGE FPWM fSW PACKAGE QUANTITY
LMR36015ARNXT Adjustable No 400 kHz 250
LMR36015ARNXR Adjustable No 400 kHz 3000
LMR36015FBRNXT Adjustable Yes 1 MHz 250
LMR36015FBRNXR Adjustable Yes 1 MHz 3000
LMR36015BRNXT Adjustable No 1 MHz 250
LMR36015BRNXR Adjustable No 1 MHz 3000

7 Pin Configuration and Functions

GUID-7C8B3270-8AFB-44C6-B0D3-97E9C44E57D6-low.gifFigure 7-1 12-Pin VQFN-HR RNX Package (Top View)

Pin Functions

NO.NAMETYPEDESCRIPTION
1, 11PGNDGPower ground terminal. Connect to system ground and AGND. Connect to CIN with short wide traces.
2, 10VINPInput supply to regulator. Connect to CIN with short wide traces.
3NC—Connect the SW pin to NC on the PCB. This simplifies the connection from the CBOOT capacitor to the SW pin. This pin has no internal connection to the regulator.
4BOOTPBootstrap supply voltage for internal high-side driver. Connect a high-quality 100-nF capacitor from this pin to the SW pin. Connect the SW pin to NC on the PCB. This simplifies the connection from the CBOOT capacitor to the SW pin.
5VCCPInternal 5-V LDO output. Used as supply to internal control circuits. Do not connect to external loads. Can be used as logic supply for power-good flag. Connect a high-quality 1-µF capacitor from this pin to GND.
6AGNDGAnalog ground for regulator and system. Ground reference for internal references and logic. All electrical parameters are measured with respect to this pin. Connect to system ground on PCB.
7FBAFeedback input to regulator. Connect to tap point of feedback voltage divider. Do not float. Do not ground.
8PGAOpen-drain power-good flag output. Connect to suitable voltage supply through a current limiting resistor. High = power OK, low = power bad. Goes low when EN = Low. Can be open or grounded when not used.
9ENAEnable input to regulator. High = ON, low = OFF. Can be connected directly to VIN; Do not float.
12SWPRegulator switch node. Connect to power inductor. Connect the SW pin to NC on the PCB. This simplifies the connection from the CBOOT capacitor to the SW pin.
A = Analog, P = Power, G = Ground

8 Specifications

8.1 Absolute Maximum Ratings

Over operating junction temperature range of -40°C to 150°C (unless otherwise noted)(1)
MINMAXUNIT
Input voltageVIN to PGND–0.366V
Input voltageEN to AGND–0.366.3V
Input voltageFB to AGND–0.35.5V
Input voltagePG to AGND–0.322V
Input voltageAGND to PGND–0.30.3V
Output voltageSW to PGND–0.366.3V
Output voltageSW to PGND less than 10-ns transients–3.566.3V
Output voltageCBOOT to SW–0.35.5V
Output voltageVCC to AGND–0.35.5V
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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