ZHCSH22C January   2009  – November 2017 LM3241

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      典型应用
  4. 4 修订历史记录
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 System Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Circuit Operation
      2. 7.3.2 Internal Synchronization Rectification
      3. 7.3.3 Current Limiting
      4. 7.3.4 Dynamically Adjustable Output Voltage
      5. 7.3.5 Thermal Overload Protection
      6. 7.3.6 Soft Start
    4. 7.4 Device Functional Modes
      1. 7.4.1 PWM Mode Operation
      2. 7.4.2 Eco-mode™ Operation
      3. 7.4.3 Shutdown Mode
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Setting the Output Voltage
        2. 8.2.2.2 Inductor Selection
          1. 8.2.2.2.1 Method 1
          2. 8.2.2.2.2 Method 2
        3. 8.2.2.3 Capacitor Selection
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 DSBGA Package Assembly and Use
      2. 10.1.2 Board Layout Considerations
    2. 10.2 Layout Example
  11. 11器件和文档支持
    1. 11.1 文档支持
      1. 11.1.1 相关文档
    2. 11.2 接收文档更新通知
    3. 11.3 社区资源
    4. 11.4 商标
    5. 11.5 静电放电警告
    6. 11.6 Glossary
  12. 12机械、封装和可订购信息

封装选项

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

6.7 Typical Characteristics

VIN = EN = 3.6 V and TA = 25°C, unless otherwise noted.
LM3241 30090431.png
SW = VCON = EN = 0 V
Figure 1. Shutdown Current vs Temperature
LM3241 30090433.png
Closed loop Switching No load
Figure 3. Eco-mode Supply Current vs Output Voltage
LM3241 30090416.gif
VOUT = 2 V RLOAD = 10 Ω
Figure 5. Output Voltage vs Supply Voltage
LM3241 30090432.png
No switching FB = 1 V VCON = 0 V
Figure 2. Quiescent Current vs Supply Voltage
LM3241 30090434.png
VOUT = 2 V IOUT = 200 mA
Figure 4. Switching Frequency vs Temperature
LM3241 30090417.gif
VOUT = 3.4 V
Figure 6. Output Voltage vs Output Current
LM3241 30090422.gif
VOUT = 0.6 V
Figure 7. Output Voltage vs Output Current
LM3241 30090444.png
Figure 9. ECO-PWM Mode Threshold Current vs Output voltage
LM3241 30090439.png
VOUT = 2 V
Figure 11. Closed-loop Current Limit vs Temperature
LM3241 30090414.gif
VOUT = 3.3 V
Figure 13. Efficiency vs Output Current
LM3241 30090447.png
Figure 15. PFET RDSON vs Supply Voltage
LM3241 30090449.png
RLOAD = 10 Ω
Figure 17. Low VCON Voltage vs Output Voltage
LM3241 30090437.png
Figure 19. EN High Threshold vs Supply Voltage
LM3241 30090419.png
VOUT = 2 V IOUT = 50 mA
Figure 21. Output Voltage Ripple in Eco-Mode
LM3241 30090424.png
VOUT = 2.5 V IOUT = 10 mA/250 mA
Figure 23. Load Transient Response
LM3241 30090427.png
VIN = 4.2 V VOUT = 3.4 V RLOAD = 3.6 kΩ
Figure 25. Startup
LM3241 30090428.png
VOUT = 2 V RLOAD = 10 Ω
Figure 27. Timed Current Limit
LM3241 30090425.gif
VOUT = 2 V
Figure 8. Output Voltage vs Output Current
LM3241 30090445.png
Figure 10. PWM-Eco-Mode Threshold Current vs Output voltage
LM3241 30090413.gif
VOUT = 2 V
Figure 12. Efficiency vs Output Current
LM3241 30090415.gif
RLOAD = 10 Ω
Figure 14. Efficiency vs Output Voltage
LM3241 30090448.png
Figure 16. NFET RDSON vs Supply Voltage
LM3241 30090438.png
100% Duty Cycle
Figure 18. VIN-VOUT vs Output Current
LM3241 30090418.png
VOUT = 2 V IOUT = 200 mA
Figure 20. Output Voltage Ripple in PWM Mode
LM3241 30090423.png
VIN = 3.6 V/4.2 V VOUT = 0.8 V RLOAD = 8 Ω
Figure 22. Line Transient Response
LM3241 30090426.png
VOUT = 0.6 V IOUT = 10 mA/60 mA
Figure 24. Load Transient Response
LM3241 30090430.png
VIN = 4.2 V VOUT = 3.4 V RLOAD = 10 kΩ
Figure 26. Shutdown