ZHCSB85F November   2011  – October 2021 TPS62140 , TPS62140A , TPS62141 , TPS62142 , TPS62143

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings (1)
    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 Diagrams
    3. 8.3 Feature Description
      1. 8.3.1 Enable/Shutdown (EN)
      2. 8.3.2 Soft-Start/Tracking (SS/TR)
      3. 8.3.3 Power Good (PG)
      4. 8.3.4 Pin-Selectable Output Voltage (DEF)
      5. 8.3.5 Frequency Selection (FSW)
      6. 8.3.6 Undervoltage Lockout (UVLO)
      7. 8.3.7 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Pulse-Width Modulation (PWM) Operation
      2. 8.4.2 Power Save Mode Operation
      3. 8.4.3 100% Duty-Cycle Operation
      4. 8.4.4 Current Limit and Short Circuit Protection
  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 Programming the Output Voltage
        2. 9.2.2.2 External Component Selection
          1. 9.2.2.2.1 Inductor Selection
          2. 9.2.2.2.2 Capacitor Selection
            1. 9.2.2.2.2.1 Output Capacitor
            2. 9.2.2.2.2.2 Input Capacitor
            3. 9.2.2.2.2.3 Soft-Start Capacitor
        3. 9.2.2.3 Tracking Function
        4. 9.2.2.4 Output Filter and Loop Stability
      3. 9.2.3 Application Curves
    3. 9.3 System Examples
      1. 9.3.1 LED Power Supply
      2. 9.3.2 Active Output Discharge
      3. 9.3.3 Inverting Power Supply
      4. 9.3.4 Various Output Voltages
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 Thermal Considerations
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 第三方产品免责声明
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 接收文档更新通知
    4. 12.4 支持资源
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 术语表
  13. 13Mechanical, Packaging, and Orderable Information

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

9.2.3 Application Curves

VIN = 12 V, VOUT = 3.3 V, TA = 25°C, (unless otherwise noted)

GUID-E2196338-36DD-4677-94DE-AF54C4E3681F-low.png
VOUT = 5 V
Figure 9-4 Efficiency With 1.25 MHz
GUID-7F0CD6BC-8956-4C9D-89CA-1F44C1EFE00B-low.png
VOUT = 5 V
Figure 9-6 Efficiency With 2.5 MHz
GUID-C4070492-7A50-4EF7-84AE-712FF1BE954E-low.png
VOUT = 3.3 V
Figure 9-8 Efficiency With 1.25 MHz
GUID-D961FDA9-C30E-4B93-B38D-3EE3C6CE80F6-low.png
VOUT = 3.3 V
Figure 9-10 Efficiency With 2.5 MHz,
GUID-3C6EF6EE-D3E6-40EE-910E-484AC82C9CC9-low.png
VOUT = 1.8 V
Figure 9-12 Efficiency With 1.25 MHz
GUID-4676F962-774C-4F19-AAA3-AE62C8CF89AC-low.png
VOUT = 0.9 V
Figure 9-14 Efficiency With 1.25 MHz
GUID-DDDE0571-A808-4659-8C7C-16D9884A3379-low.pngFigure 9-16 Output Voltage Accuracy (Load Regulation)
GUID-05630EE4-AAB1-4E3B-B22D-88D3F17038C3-low.png
FSW = LowVOUT = 5 V
Figure 9-18 Switching Frequency vs Input Voltage
GUID-FF58DE59-B5BB-4327-A0B0-B469BF2412A5-low.png
FSW = LowVOUT = 3.3 V
Figure 9-20 Switching Frequency vs Input Voltage
GUID-9E35ABE6-931C-47A3-9592-81E2C38FD990-low.png
FSW = LowVOUT = 1.8 V
Figure 9-22 Switching Frequency vs Input Voltage
GUID-8D1DBA94-C011-491C-8E63-D15506EA3FD2-low.png
FSW = LowVOUT = 1 V
Figure 9-24 Switching Frequency vs Input Voltage
GUID-35AE96D3-4152-4B7F-83DF-4761FBAB64D4-low.pngFigure 9-26 Output Voltage Ripple
GUID-2AED71C7-DDC6-474A-81DA-5D9AD9DECA75-low.png
IOUT = 1AfSW = 2.5 MHz
Figure 9-28 Power-Supply Rejection Ratio
GUID-F2B1C9A3-8D1D-48BA-80DC-258296061271-low.gif
VIN = 12 VVOUT = 3.3 V With 50 mV/div
Figure 9-30 PWM-PSM-Transition
GUID-5FCCB533-B923-4997-95E6-25C8E99F90B2-low.gifFigure 9-32 Line Transient Response of Figure 9-31, Rising Edge
GUID-D934C6A7-6860-4B70-98C9-11D63682613A-low.gif
VIN = 12 VVOUT = 3.3 V
Figure 9-34 Start-Up Into 100 mA
GUID-FEEF1BF0-5ADF-439E-BCDF-6E2344268971-low.gif
IOUT = 1 A
Figure 9-36 Typical Operation in PWM Mode
GUID-45305E84-EDFC-404E-9E46-F824C0C31811-low.png
fSW = 2.5 MHz
Figure 9-38 Maximum Ambient Temperature
GUID-9411D3F7-09DF-4480-BC65-C234C1046EA9-low.png
VOUT = 5 V
Figure 9-5 Efficiency With 1.25 MHz
GUID-69A65A77-A627-476C-92C3-270F79D155BA-low.png
VOUT = 5 V
Figure 9-7 Efficiency With 2.5 MHz
GUID-3847564F-EBA6-4A9C-9406-24033BF85FFC-low.png
VOUT = 3.3 V
Figure 9-9 Efficiency With 1.25 MHz
GUID-672B5317-86AB-4836-8C26-544482DA5F16-low.png
VOUT = 3.3 V
Figure 9-11 Efficiency With 2.5 MHz
GUID-D7CC8BBE-FD2F-481D-A7B8-60ADCF7564E2-low.png
VOUT = 1.8 V
Figure 9-13 Efficiency With 1.25 MHz
GUID-2D097ACE-8FD7-4439-AB5F-FA227528EC25-low.png
VOUT = 0.9 V
Figure 9-15 Efficiency With 1.25 MHz
GUID-BC712B2F-D729-4C7F-9766-396D1D9F2D90-low.pngFigure 9-17 Output Voltage Accuracy (Line Regulation)
GUID-6265F6AC-670A-463F-BF83-D470415F8807-low.png
FSW = LowVOUT = 5 V
Figure 9-19 Switching Frequency vs Output Current
GUID-B0513E91-7D9F-4A52-85F7-05A2C8977E9C-low.png
FSW = LowVOUT = 3.3 V
Figure 9-21 Switching Frequency vs Output Current
GUID-6B2363E3-15A0-4B54-97DA-F8A7761CACA5-low.png
FSW = LowVOUT = 1.8 V
Figure 9-23 Switching Frequency vs Output Current
GUID-96A9CC33-E4A1-474B-B57C-1C209EF68648-low.png
FSW = LowVOUT = 1 V
Figure 9-25 Switching Frequency vs Output Current
GUID-B91DE164-F6F5-4A53-9D0C-FBF88BFDA75D-low.pngFigure 9-27 Maximum Output Current
GUID-136CF752-9065-4FE4-B94B-7AC67C9E690F-low.png
IOUT = 0.1AfSW = 2.5 MHz
Figure 9-29 Power-Supply Rejection Ratio
GUID-BC08D97E-BCFB-487C-8FAC-0BE43A2717C1-low.gif
IOUT= 0.5 to 2 to 0.5 A VIN = 12 V VOUT = 3.3 V
Figure 9-31 Load Transient Response
GUID-5789C5C4-C2B3-4BAE-AFF9-A9971879FA58-low.gifFigure 9-33 Line Transient Response of Figure 9-31, Falling Edge
GUID-9CEFC34B-2763-4CFB-A2D9-353FA0EEE1CF-low.gif
VIN = 12 VVOUT = 3.3 V
Figure 9-35 Start-Up into 2 A
GUID-A0A16657-08E1-4B4F-9D69-6DEF95246E14-low.gif
IOUT = 10 A
Figure 9-37 Typical Operation in Power-Save Mode
GUID-88843B4F-9466-4482-825F-58A4071DF176-low.png
fSW = 2.5 MHz
Figure 9-39 Maximum Ambient Temperature