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  • TPS62840 1.8V 至 6.5V、750mA、60nA IQ 降压转换器

    • ZHCSJW0D June   2019  – March 2020 TPS62840

      PRODUCTION DATA.  

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  • TPS62840 1.8V 至 6.5V、750mA、60nA IQ 降压转换器
  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      典型应用
      2.      效率与负载电流间的关系 (VOUT = 1.8V)
  4. 4 修订历史记录
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 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. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Smart Enable and Shutdown
      2. 8.3.2 Soft Start
      3. 8.3.3 Mode Selection: Power-Save Mode (PFM/PWM) or Forced PWM Operation (FPWM)
      4. 8.3.4 Output Voltage Selection (VSET)
      5. 8.3.5 Undervoltage Lockout UVLO
      6. 8.3.6 Switch Current Limit / Short Circuit Protection
      7. 8.3.7 Output Voltage Discharge
      8. 8.3.8 Thermal Shutdown
      9. 8.3.9 STOP Mode
    4. 8.4 Device Functional Modes
      1. 8.4.1 Power-Save Mode Operation
      2. 8.4.2 Forced PWM Mode Operation
      3. 8.4.3 100% Mode Operation
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Inductor Selection
        2. 9.2.2.2 Output Capacitor Selection
        3. 9.2.2.3 Input Capacitor Selection
      3. 9.2.3 Application Curves
    3. 9.3 System Example
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12器件和文档支持
    1. 12.1 器件支持
      1. 12.1.1 第三方产品免责声明
    2. 12.2 保障资源
    3. 12.3 商标
    4. 12.4 静电放电警告
    5. 12.5 Glossary
  13. 13机械、封装和可订购信息
  14. 重要声明
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DATA SHEET

TPS62840 1.8V 至 6.5V、750mA、60nA IQ 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

  • 60nA 工作静态电流
  • 100% 占空比模式下，IQ 为 120nA
  • 输入电压范围 VIN：1.8V 至 6.5V
  • 高达 750mA 的输出电流
  • 射频友好型 DCS-Control™
  • 1µA IOUT（3.6VIN 至 1.8VOUT）时的效率为 80%
  • 通过 VSET 引脚提供 16 种可选输出电压
    • 自动转换 PFM/PWM 或强制 PWM 模式
    • 可选的强制 PWM 和 STOP 模式
    • 输出放电功能
    • 25nA 关断电流
    • SON-8、WCSP-6 和热增强型 HVSSOP-8

    2 应用

    • 智能仪表、智能恒温器
    • 资产跟踪设备
    • 可穿戴电子产品
    • 医疗传感器贴片和患者监护仪
    • 工业物联网（智能传感器）/窄带物联网
    • 测试和测量
    • ATEX/本质安全

    3 说明

    TPS62840 是一款高效降压转换器，具有典型值为 60nA 的超低工作静态电流。此器件具有特殊电路，可在 100% 模式下实现仅 120nA 的 IQ，因此可在放电末期进一步延长电池寿命。

    此器件采用 DCS-Control 技术，可以为无线电提供干净的电源，工作时具有 1.8MHz 的典型开关频率。在省电模式下，此器件可将轻负载效率向下扩展至 1μA 负载电流及以下。

    可以将一个电阻器连接到 VSET 引脚以选择 16 种预定义的输出电压，因此这款器件可以灵活地用于各种 应用 并最大限度地减少了外部组件的数量。

    该器件的 STOP 引脚可立即消除所有的开关噪声，从而在测试和测量系统中执行无噪声测量。

    TPS62840 提供了高达 750mA 的输出电流。此器件的输入电压为 1.8V 至 6.5V，支持多种电源，例如 2 节至 4 节碱性电池或 1 节至 2 节锂二氧化锰 (Li-MnO2) 或 1 节锂离子/锂亚硫酰氯 (Li-SOCl2) 电池。

    器件信息(1)

    器件型号 封装 封装尺寸（标称值）
    TPS6284x 8 引脚 DLC (SON) 1.5mm x 2mm
    6 引脚 YBG (WCSP) 0.97mm x 1.47mm
    8 引脚 DGR (HVSSOP) 3mm x 5mm
    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。

    Device Images

    典型应用

    TPS62840 TPS62841_DLC.png

    效率与负载电流间的关系 (VOUT = 1.8V)

    TPS62840 D0001-SLVSEC6-02.gif

    4 修订历史记录

    Changes from C Revision (November 2019) to D Revision

    • Updated the Device Comparison TableGo
    • Added efficiency graphs to the Application CurvesGo

    Changes from B Revision (August 2019) to C Revision

    • 将 SON-8、WCSP-6 和热增强型 HVSSOP-8 添加至特性Go
    • 将“ATEX/本质安全”添加到应用Go
    • 更新了典型应用图像以显示 TPS62842DGR 器件Go
    • Added orderable part number TPS62841DGR to Device Comparison TableGo
    • Added orderable part number TPS62842DGR to Device Comparison TableGo
    • Updated Thermal Information values to support TPS62842DGRGo
    • Added low-side MOSFET switch current limit to Electrical CharacteristicsGo
    • Added TPS62841DGR to Output Voltage SelectionGo
    • Updated Efficiency Power Save graphs in Application CurvesGo
    • Updated Load Transient waveform in Application CurvesGo
    • Added PCB layout for DGR packageGo

    Changes from A Revision (July 2019) to B Revision

    • 将销售状态从“预告信息”更改为“生产数据”Go

    5 Device Comparison Table

    ORDERABLE PART NUMBER OUTPUT VOLTAGE OUTPUT CURRENT OUTPUT DISCHARGE MODE PIN STOP PIN PACKAGE PACKAGE
    MARKING
    TPS62840DLC 1.8 V to 3.3 V
    in 100-mV steps    		 750 mA yes yes yes SON-8 (DLC) E5
    TPS62840YBG no no WCSP-6 (YBG) 62840
    TPS62841DLC 0.8 V to 1.55 V
    in 50-mV steps    		 750 mA yes yes yes SON-8 (DLC) E9
    TPS62841YBG no no WCSP-6 (YBG) 62841
    TPS62841DGR yes no HVSSOP-8 (DGR) 62841
    TPS62842DGR 1.8 V, 2.0 V, 2.2 V,
    2.4 V to 3.6 V in 100-mV steps    		 750 mA yes yes no HVSSOP-8 (DGR) 62842
    TPS62849DLC 3.4-V fixed output voltage yes SON-8 (DLC) FF

    6 Pin Configuration and Functions

    DLC
    SON-8
    TPS62840 Pinout_8.gif
    DGR
    HVSSOP-8
    TPS62840 Pinout_8_DGR.gif
    YBG
    WCSP-6
    TPS62840 Pinout_6.gif

    Pin Functions

    PIN I/O DESCRIPTION
    NAME DLC
    (SON-8)    		 DGR
    (HVSSOP-8)    		 YBG
    (WCSP-6)
    VIN 2 6 B1 PWR VIN power supply pin. Connect the input capacitor close to this pin for best noise and voltage spike suppression. A 4.7-µF ceramic capacitor is required.
    SW 7 2 B2 PWR The switch pin is connected to the internal MOSFET switches. Connect the inductor to this terminal.
    GND 1 8 A1 PWR GND supply pin. Connect this pin close to the GND terminal of the input and output capacitors.
    VSET 5 4 C2 IN Connecting a resistor to GND sets the output voltage when the converter is enabled. For the TPS62849, connect this pin to GND.
    VOS 8 1 A2 IN Output voltage sense pin for the internal feedback divider network and regulation loop. When the converter is disabled, this pin discharges VOUT by an internal MOSFET. Connect this pin directly to the output capacitor with a short trace.
    EN 4 5 C1 IN Enable pin. A high level enables the device and a low level turns the device off. The pin features an internal pulldown resistor, which is disabled once the device has started up and the output voltage is regulated. The pulldown resistor is activated again, once a low level has been detected.
    STOP 6 n/a n/a IN STOP Switching pin. When this pin is logic high, the converter stops switching in order to provide a quiet supply rail. The output is powered from the charge available in the output capacitor. When this pin is logic low, the device immediately resumes operation. The pin features an internal pulldown resistor, which is disabled once a high level is detected at the input. The pulldown resistor is activated again, once a low level has been detected.
    MODE 3 3 n/a IN MODE pin. A low level enables Power-Save Mode operation with an automatic transition between PFM and PWM modes. A high level forces the converter to operated in PWM mode. This pin can be toggled during operation. It must be terminated.
    NC n/a 7 n/a This pin is not connected internally. Do not connect this pin.
    EP n/a 9 n/a PWR Exposed thermal pad(1). The PowerPAD must be connected to GND.
    (1) For more information about the PowerPAD, see the PowerPAD™ Thermally Enhanced Package application report.

     
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