ZHCSCW5B August   2014  – September 2017 LM43600

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 简化电路原理图
    1.     5
    2.     辐射发射图VIN = 12V，VOUT = 3.3V，FSW= 500kHz，IOUT = 0.5A
  5. 5 修订历史记录
  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 Timing Requirements
    7. 7.7 Switching Characteristics
    8. 7.8 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  Fixed Frequency Peak Current Mode Controlled Step-Down Regulator
      2. 8.3.2  Light Load Operation
      3. 8.3.3  Adjustable Output Voltage
      4. 8.3.4  Enable (ENABLE)
      5. 8.3.5  VCC, UVLO and BIAS
      6. 8.3.6  Soft Start and Voltage Tracking (SS/TRK)
      7. 8.3.7  Switching Frequency (RT) and Synchronization (SYNC)
      8. 8.3.8  Minimum ON-Time, Minimum OFF-Time and Frequency Foldback at Dropout Conditions
      9. 8.3.9  Internal Compensation and CFF
      10. 8.3.10 Bootstrap Voltage (BOOT)
      11. 8.3.11 Power Good (PGOOD)
      12. 8.3.12 Overcurrent and Short-Circuit Protection
      13. 8.3.13 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Shutdown Mode
      2. 8.4.2 Stand-by Mode
      3. 8.4.3 Active Mode
      4. 8.4.4 CCM Mode
      5. 8.4.5 Light Load Operation
      6. 8.4.6 Self-Bias Mode
  9. 9 Applications and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      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  Output Voltage Setpoint
        3. 9.2.2.3  Switching Frequency
        4. 9.2.2.4  Input Capacitors
        5. 9.2.2.5  Inductor Selection
        6. 9.2.2.6  Output Capacitor Selection
        7. 9.2.2.7  Feedforward Capacitor
        8. 9.2.2.8  Bootstrap Capacitors
        9. 9.2.2.9  VCC Capacitor
        10. 9.2.2.10 BIAS Capacitors
        11. 9.2.2.11 Soft-Start Capacitors
        12. 9.2.2.12 Undervoltage Lockout Setpoint
        13. 9.2.2.13 PGOOD
      3. 9.2.3 Application Performance Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 Compact Layout for EMI Reduction
      2. 11.1.2 Ground Plane and Thermal Considerations
      3. 11.1.3 Feedback Resistors
    2. 11.2 Layout Example
  12. 12器件和文档支持
    1. 12.1 开发支持
      1. 12.1.1 使用 WEBENCH® 工具创建定制设计
    2. 12.2 接收文档更新通知
    3. 12.3 社区资源
    4. 12.4 商标
    5. 12.5 静电放电警告
    6. 12.6 Glossary
  13. 13机械、封装和可订购信息

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)
  • PWP|16
散热焊盘机械数据 (封装 | 引脚)
订购信息

7.8 Typical Characteristics

Unless otherwise specified, VIN = 12 V, VOUT = 3.3 V, FS = 500 kHz, L = 22 µH, COUT = 100 µF, CFF = 33 pF. See Application Performance Curves for bill of materials (BOM) for other VOUT and FSW combinations.
LM43600 C002_Eff_43600_3p3V500k.png
VOUT = 3.3 V FSW = 500 kHz
Figure 1. Efficiency
LM43600 C003_Eff_43600_5V500k.png
VOUT = 5 V FSW = 500 kHz
Figure 3. Efficiency
LM43600 C007_Eff_43600_12V500k.png
VOUT = 12 V FSW = 500 kHz
Figure 5. Efficiency
LM43600 C012_Reg_43600_3p3V500k.png
VOUT = 3.3 V FSW = 500 kHz
Figure 7. VOUT Regulation
LM43600 C013_Reg_43600_5V500k.png
VOUT = 5 V FSW = 500 kHz
Figure 9. VOUT Regulation
LM43600 C017_Reg_43600_12V500k.png
VOUT = 12 V FSW = 500 kHz
Figure 11. VOUT Regulation
LM43600 C022_DO_43600_3p3V500k.png
VOUT = 3.3 V FSW = 500 kHz
Figure 13. Dropout Curve
LM43600 C023_DO_43600_5V500k.png
VOUT = 5 V FSW = 500 kHz
Figure 15. Dropout Curve
LM43600 C027_DO_43600_12V500k.png
VOUT = 12 V FSW = 500 kHz
Figure 17. Dropout Curve
LM43600 43600_3V3_500kHz_Freq_Drop.png
VOUT = 3.3 V FSW = 500 kHz
Figure 19. Switching Frequency vs VIN in Dropout Operation
LM43600 lm43600-3p3-500k_radiated.gif
VOUT = 3.3 V FSW = 500 kHz IOUT = 0.5 A
Measured on the LM43600PWPEVM with default BOM. No input filter used.
Figure 21. Radiated EMI Curve
LM43600 lm43600_3p3_500k_Conducted.gif
VOUT = 3.3 V FSW = 500 kHz IOUT = 0.5 A
Measured on the LM43600PWPEVM with default BOM. Input filter: Lin = 1 µH Cd = 47 µF CIN4 = 68 µF
Figure 23. Conducted EMI Curve
LM43600 Gen_Curve_On_Resistance.png
Figure 25. High-Side and Low-side On Resistance vs Junction Temperature
LM43600 Gen_Curve_EN_Threshold.png
Figure 27. Enable Threshold vs Junction Temperature
LM43600 Gen_Curve_PG_Threshold.png
Figure 29. PGOOD Threshold vs Junction Temperature
LM43600 Gen_Curve_46000Curr_Lim.png
VIN = 12 V VOUT = 3.3 V FS = 500 kHz
Figure 31. Peak and Valley Current Limits vs Temperature
LM43600 C004_Eff_43600_5V200k.png
VOUT = 5 V FSW = 200 kHz
Figure 2. Efficiency
LM43600 C005_Eff_43600_5V1M.png
VOUT = 5 V FSW = 1 MHz
Figure 4. Efficiency
LM43600 C008_Eff_43600_24V500k.png
VOUT = 24 V FSW = 500 kHz
Figure 6. Efficiency
LM43600 C014_Reg_43600_5V200k.png
VOUT = 5 V FSW = 200 kHz
Figure 8. VOUT Regulation
LM43600 C015_Reg_43600_5V1M.png
VOUT = 5 V FSW = 1 MHz
Figure 10. VOUT Regulation
LM43600 C018_Reg_43600_24V500k.png
VOUT = 24 V FSW = 500 kHz
Figure 12. VOUT Regulation
LM43600 C024_DO_43600_5V200k.png
VOUT = 5 V FSW = 200 kHz
Figure 14. Dropout Curve
LM43600 C025_DO_43600_5V1M.png
VOUT = 5 V FSW = 1 MHz
Figure 16. Dropout Curve
LM43600 C028_DO_43600_24V500k.png
VOUT = 24 V FSW = 500 kHz
Figure 18. Dropout Curve
LM43600 43600_5V_1MHz_Freq_Drop.png
VOUT = 5 V FSW = 1 MHz
Figure 20. Switching Frequency vs VIN in Dropout Operation
LM43600 lm43600_5_500k_radiated.gif
VOUT = 5 V FSW = 500 kHz IOUT = 0.5 A
Measured on the LM43600PWPEVM with L = 44 µH, COUT = 66 µF, CFF = 33 pF. No input filter used.
Figure 22. Radiated EMI Curve
LM43600 lm43600_5_500k_Conducted.gif
VOUT = 5 V FSW = 500 kHz IOUT = 0.5 A
Measured on the LM43600PWPEVM with L = 44 µH, COUT = 66 µF, CFF = 33 pF. Input filter Lin = 1 µH Cd = 47 µF CIN4 = 68 µF
Figure 24. Conducted EMI Curve
LM43600 Gen_Curve_Shdn_Current.png
Figure 26. Shutdown Current vs Junction Temperature
LM43600 Gen_Curve_EN_Leakage_Curr.png
Figure 28. Enable Leakage Current vs
Junction Temperature
LM43600 Gen_Curve_FB_Voltage.png
Figure 30. Feedback Voltage vs Junction Temperature
LM43600 Gen_Curve_43601Iq.png
i.
VOUT = 3.3 V FSW = 500 kHz IOUT = 0 A
Figure 32. Operation IQ vs VIN with BIAS Connected to VOUT