ZHCSE16C July   2015  – November 2017 LM43600-Q1

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
    1.     辐射发射图（VIN = 12V，VOUT = 3.3V FS = 500kHz，IOUT = 0.5A）
  3. 3 说明
    1.     简化原理图
  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 Timing Requirements
    7. 6.7 Switching Characteristics
    8. 6.8 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  Fixed Frequency Peak Current Mode Controlled Step-Down Regulator
      2. 7.3.2  Light Load Operation
      3. 7.3.3  Adjustable Output Voltage
      4. 7.3.4  Enable (ENABLE)
      5. 7.3.5  VCC, UVLO and BIAS
      6. 7.3.6  Soft-Start and Voltage Tracking (SS/TRK)
      7. 7.3.7  Switching Frequency (RT) and Synchronization (SYNC)
      8. 7.3.8  Minimum ON-Time, Minimum OFF-Time and Frequency Foldback at Dropout Conditions
      9. 7.3.9  Internal Compensation and CFF
      10. 7.3.10 Bootstrap Voltage (BOOT)
      11. 7.3.11 Power Good (PGOOD)
      12. 7.3.12 Overcurrent and Short-Circuit Protection
      13. 7.3.13 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Mode
      2. 7.4.2 Stand-by Mode
      3. 7.4.3 Active Mode
      4. 7.4.4 CCM Mode
      5. 7.4.5 Light Load Operation
      6. 7.4.6 Self-Bias Mode
  8. 8 Applications and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1  Custom Design With WEBENCH® Tools
        2. 8.2.2.2  Output Voltage Setpoint
        3. 8.2.2.3  Switching Frequency
        4. 8.2.2.4  Input Capacitors
        5. 8.2.2.5  Inductor Selection
        6. 8.2.2.6  Output Capacitor Selection
        7. 8.2.2.7  Feedvorward Capacitor
        8. 8.2.2.8  Bootstrap Capacitors
        9. 8.2.2.9  VCC Capacitor
        10. 8.2.2.10 BIAS Capacitors
        11. 8.2.2.11 Soft-Start Capacitors
        12. 8.2.2.12 Undervoltage Lockout Setpoint
        13. 8.2.2.13 PGOOD
      3. 8.2.3 Application Performance Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Compact Layout for EMI Reduction
      2. 10.1.2 Ground Plane and Thermal Considerations
      3. 10.1.3 Feedback Resistors
    2. 10.2 Layout Example
  11. 11器件和文档支持
    1. 11.1 开发支持
      1. 11.1.1 使用 WEBENCH® 工具创建定制设计
    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

8.2.3 Application Performance Curves

See Table 2 for bill of materials for each VOUT and FS combination. Unless otherwise stated, application performance curves were taken at TA = 25 °C.
LM43600-Q1 Sch_BOM_1V500k_snvsa99.gif
VOUT = 1 V FS = 500 kHz VIN = 12 V
Figure 47. BOM for VOUT = 1 V FS = 500 kHz
LM43600-Q1 C011_Reg_43600_1V500k.png
VOUT = 1 V FS = 500 kHz
Figure 49. Output Voltage Regulation
LM43600-Q1 12VIN_1VO_500k_50mATO500mA.gif
VOUT = 1 V FS = 500 kHz VIN = 12 V
Figure 51. Load Transient Between 0.05 A and 0.5 A
LM43600-Q1 Sch_BOM_3.3V500k_snvsa99.gif
VOUT = 3.3 V FS = 500 kHz VIN = 12 V
Figure 53. BOM for VOUT = 3.3 V FS = 500 kHz
LM43600-Q1 C012_Reg_43600_3p3V500k.png
VOUT = 3.3 V FS = 500 kHz
Figure 55. Output Voltage Regulation
LM43600-Q1 12VIN_3p3VO_500k_50mATO500mA.gif
VOUT = 3.3 V FS = 500 kHz VIN = 12 V
Figure 57. Load Transient Between 0.05 A and 0.5 A
LM43600-Q1 Sch_BOM_5V500k_snvsa99.gif
VOUT = 5 V FS = 500 kHz VIN = 12 V
Figure 59. BOM for VOUT = 5 V FS = 500 kHz
LM43600-Q1 C013_Reg_43600_5V500k.png
VOUT = 5 V FS = 500 kHz
Figure 61. Output Voltage Regulation
LM43600-Q1 12VIN_5VO_500k_50mATO500mA.gif
VOUT = 5 V FS = 500 kHz VIN = 12 V
Figure 63. Load Transient Between 0.05 A and 0.5 A
LM43600-Q1 Sch_BOM_5V200k_snvsa99.gif
VOUT = 5 V FS = 200 kHz VIN = 12 V
Figure 65. BOM for VOUT = 5 V FS = 200 kHz
LM43600-Q1 C014_Reg_43600_5V200k.png
VOUT = 5 V FS = 200 kHz
Figure 67. Output Voltage Regulation
LM43600-Q1 12VIN_5VO_200k_50mATO500mA.gif
VOUT = 5 V FS = 200 kHz VIN = 12 V
Figure 69. Load Transient Between 0.05 A and 0.5 A
LM43600-Q1 Sch_BOM_5V1M_snvsa99.gif
VOUT = 5 V FS = 1 MHz VIN = 12 V
Figure 71. BOM for VOUT = 5 V FS = 1 MHz
LM43600-Q1 C015_Reg_43600_5V1M.png
VOUT = 5 V FS = 1 MHz
Figure 73. Output Voltage Regulation
LM43600-Q1 12VIN_5VO_1M_50mATO500mA.gif
VOUT = 5 V FS = 1 MHz VIN = 12 V
Figure 75. Load Transient Between 0.05 A and 0.5 A
LM43600-Q1 Sch_BOM_5V2p2M_snvsa99.gif
VOUT = 5 V FS = 2.2 MHz VIN = 12 V
Figure 77. BOM for VOUT = 5 V FS = 2.2 MHz
LM43600-Q1 C016_Reg_43600_5V2p2M.png
VOUT = 5 V FS = 2.2 MHz
Figure 79. Output Voltage Regulation
LM43600-Q1 12VIN_5VO_2p2M_50mATO500mA.gif
VOUT = 5 V FS = 2.2 MHz VIN = 12 V
Figure 81. Load Transient Between 0.05 A and 0.5 A
LM43600-Q1 Sch_BOM_12V500k_snvsa99.gif
VOUT = 12 V FS = 500 kHz VIN = 24 V
Figure 83. BOM for VOUT = 12 V FS = 500 kHz
LM43600-Q1 C017_Reg_43600_12V500k.png
VOUT = 12 V FS = 500 kHz
Figure 85. Output Voltage Regulation
LM43600-Q1 24VIN_12VO_500k_50mATO500mA.gif
VOUT = 12 V FS = 500 kHz VIN = 24 V
Figure 87. Load Transient Between 0.05 A and 0.5 A
LM43600-Q1 3p3VO_500kThetaJA20CpW.png
VOUT = 3.3 V FS = 500 kHz RθJA = 20 °C/W
Figure 89. Derating Curve with RθJA = 20 °C/W
LM43600-Q1 5VO_200kThetaJA20CpW.png
i.
VOUT = 5 V FS = 200 kHz RθJA = 20 °C/W
Figure 91. Derating Curve with RθJA = 20 °C/W
LM43600-Q1 3p3V_500k_Fsw_PFM.png
VOUT = 3.3 V FS = 500 kHz
Figure 93. Switching Frequency vs IOUT in PFM Operation
LM43600-Q1 12VIN_3V3_500k_500mA_CCM.gif
VOUT = 3.3 V FS = 500 kHz IOUT = 0.5 A
Figure 95. Switching Waveform in CCM Operation
LM43600-Q1 12VIN_3V3_500k_0mA_PFM.gif
VOUT = 3.3 V FS = 500 kHz IOUT = 0 mA
Figure 97. Switching Waveform in PFM Operation
LM43600-Q1 12VIN_3p3VO_500k_250mA.gif
VIN = 12 V VOUT = 3.3 V RLOAD = 13.2 Ω
Figure 99. Startup Into Half Load with Internal Soft-Start Rate
LM43600-Q1 12VIN_3p3VO_500k_PREBIAS_1V.gif
VIN = 12 V VOUT = 3.3 V RLOAD = Open
Figure 101. Startup Into 1 V Pre-biased Voltage
LM43600-Q1 12TO36V_3V3_500k_250mA_1V1us.gif
VOUT = 3.3 V FS = 500 kHz IOUT = 0.25 A
Figure 103. Line Transient: VIN Transitions Between 12 V and 36 V
LM43600-Q1 12VIN_3p3VO_500k_500mA_SHORT_RECOVERY.gif
VOUT = 3.3 V FS = 500 kHz VIN = 12 V
Figure 105. Short-Circuit Protection and Recover
LM43600-Q1 C001_Eff_43600_1V500k.png
VOUT = 1 V FS = 500 kHz
Figure 48. Efficiency
LM43600-Q1 12VIN_1VO_500k_0mATO500mA.gif
VOUT = 1 V FS = 500 kHz VIN = 12 V
Figure 50. Load Transient Between 0 A and 0.5 A
LM43600-Q1 12V_1VO_500kThetaJA.png
VOUT = 1 V FS = 500 kHz VIN = 12 V
Figure 52. Derating Curve
LM43600-Q1 C002_Eff_43600_3p3V500k.png
VOUT = 3.3 V FS = 500 kHz
Figure 54. Efficiency
LM43600-Q1 C022_DO_43600_3p3V500k.png
VOUT = 3.3 V FS = 500 kHz
Figure 56. Dropout Curve
LM43600-Q1 12V_3p3VO_500kThetaJA.png
VOUT = 3.3 V FS = 500 kHz VIN = 12 V
Figure 58. Derating Curve
LM43600-Q1 C003_Eff_43600_5V500k.png
VOUT = 5 V FS = 500 kHz
Figure 60. Efficiency
LM43600-Q1 C023_DO_43600_5V500k.png
VOUT = 5 V FS = 500 kHz
Figure 62. Dropout Curve
LM43600-Q1 12V_5VO_500kThetaJA.png
VOUT = 5 V FS = 500 kHz VIN = 12 V
Figure 64. Derating Curve
LM43600-Q1 C004_Eff_43600_5V200k.png
VOUT = 5 V FS = 200 kHz
Figure 66. Efficiency
LM43600-Q1 C024_DO_43600_5V200k.png
VOUT = 5 V FS = 200 kHz
Figure 68. Dropout Curve
LM43600-Q1 12V_5VO_200kThetaJA.png
VOUT = 5 V FS = 200 kHz VIN = 12 V
Figure 70. Derating Curve
LM43600-Q1 C005_Eff_43600_5V1M.png
VOUT = 5 V FS = 1 MHz VIN = 12 V
Figure 72. Efficiency
LM43600-Q1 C025_DO_43600_5V1M.png
VOUT = 5 V FS = 1 MHz
Figure 74. Dropout Curve
LM43600-Q1 12V_5VO_1000kThetaJA.png
VOUT = 5 V FS = 1 MHz VIN = 12 V
Figure 76. Derating Curve
LM43600-Q1 C006_Eff_43600_5V2p2M.png
VOUT = 5 V FS = 2.2 MHz VIN = 12 V
Figure 78. Efficiency
LM43600-Q1 C026_DO_43600_5V2p2M.png
VOUT = 5 V FS = 2.2 MHz
Figure 80. Dropout Curve
LM43600-Q1 12V_5VO_2200kThetaJA.png
VOUT = 5 V FS = 2.2 MHz VIN = 12 V
Figure 82. Derating Curve
LM43600-Q1 C007_Eff_43600_12V500k.png
VOUT = 12 V FS = 500 kHz
Figure 84. Efficiency
LM43600-Q1 C027_DO_43600_12V500k.png
VOUT = 12 V FS = 500 kHz
Figure 86. Dropout Curve
LM43600-Q1 24V_12VO_500kThetaJA.png
VOUT = 12 V FS = 500 kHz VIN = 24 V
Figure 88. Derating Curve
LM43600-Q1 5VO_500kThetaJA20CpW.png
VOUT = 5 V FS = 500 kHz RθJA = 20 °C/W
Figure 90. Derating Curve with RθJA = 20 °C/W
LM43600-Q1 5VO_1000kThetaJA20CpW.png
VOUT = 5 V FS = 1 MHz RθJA = 20 °C/W
Figure 92. Derating Curve with RθJA = 20 °C/W
LM43600-Q1 5V_1M_Fsw_PFM.png
VOUT = 5 V FS = 1 MHz
Figure 94. Switching Frequency vs IOUT in PFM Operation
LM43600-Q1 12VIN_3V3_500k_10mA_DCM.gif
VOUT = 3.3 V FS = 500 kHz IOUT =10 mA
Figure 96. Switching Waveform in DCM Operation
LM43600-Q1 12VIN_3p3VO_500k_500mA.gif
VIN = 12 V VOUT = 3.3 V RLOAD = 6.6 Ω
Figure 98. Startup Into Full Load with Internal Soft-Start Rate
LM43600-Q1 12VIN_3p3VO_500k_100mA.gif
VIN = 12 V VOUT = 3.3 V RLOAD = 33 Ω
Figure 100. Startup Into 100 mA with Internal Soft-Start Rate
LM43600-Q1 24VIN_12VO_500k_500mA_33nFCss.gif
VIN = 24 V VOUT = 12 V RLOAD = 6 Ω
Figure 102. Startup with External Capacitor CSS
LM43600-Q1 12TO36V_3V3_500k_500mA_1V1us.gif
VOUT = 3.3 V FS = 500 kHz IOUT = 0.5 A
Figure 104. Line Transient: VIN Transitions Between 12 V and 36 V