ZHCSH62B December   2017  – October 2019 LM76002-Q1 , LM76003-Q1

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     简化原理图
    2.     效率与输出电流（VOUT = 5V，fSW = 400kHz，自动模式）
  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 Characteristics
    7. 6.7 Switching Characteristics
    8. 6.8 System Characteristics
    9. 6.9 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 Control
      2. 7.3.2  Light Load Operation Modes — PFM and FPWM
      3. 7.3.3  Adjustable Output Voltage
      4. 7.3.4  Enable (EN Pin) and UVLO
      5. 7.3.5  Internal LDO, VCC UVLO, and Bias Input
      6. 7.3.6  Soft Start and Voltage Tracking (SS/TRK)
      7. 7.3.7  Adjustable Switching Frequency (RT) and Frequency Synchronization
      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 and VBOOT UVLO (BOOT Pin)
      11. 7.3.11 Power Good and Overvoltage Protection (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 Standby Mode
      3. 7.4.3 Active Mode
      4. 7.4.4 CCM Mode
      5. 7.4.5 DCM Mode
      6. 7.4.6 Light Load Mode
      7. 7.4.7 Foldback Mode
      8. 7.4.8 Forced Pulse-Width-Modulation Mode
      9. 7.4.9 Self-Bias Mode
  8. 8 Application 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  Feed-Forward Capacitor
        8. 8.2.2.8  Bootstrap Capacitors
        9. 8.2.2.9  VCC Capacitors
        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
        14. 8.2.2.14 Synchronization
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Layout Highlights
      2. 10.1.2 Compact Layout for EMI Reduction
      3. 10.1.3 Ground Plane and Thermal Considerations
      4. 10.1.4 Feedback Resistors
    2. 10.2 Layout Example
    3. 10.3 Thermal Design
  11. 11器件和文档支持
    1. 11.1 器件支持
      1. 11.1.1 开发支持
        1. 11.1.1.1 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 支持资源
    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

8.2.3 Application Curves

Unless otherwise specified the following conditions apply:
LM76002-Q1 LM76003-Q1 D039-tc-eff-auto-3pt3vout-400k-snvsau3.gif
VOUT = 3.3 V fSW = 400 kHz Auto Mode
Figure 23. LM76003-Q1 Efficiency
LM76002-Q1 LM76003-Q1 D034-tc-eff-auto-5vout-400k-snvsau3.gif
VOUT = 5 V fSW = 400 kHz Auto Mode
Figure 25. LM76003-Q1 Efficiency
LM76002-Q1 LM76003-Q1 D016-LM76003-eff-5v0-1000k-a-snvsak0.gif
VOUT = 5 V fSW = 1000 kHz Auto Mode
Figure 27. LM76003-Q1 Efficiency
LM76002-Q1 LM76003-Q1 D018-LM76003-eff-5v0-2200k-a-snvsak0.gif
VOUT = 5 V fSW = 2200 kHz Auto Mode
Figure 29. LM76003-Q1 Efficiency
LM76002-Q1 LM76003-Q1 D020-LM76003-eff-12v0-500k-a-snvsak0.gif
VOUT = 12 V fSW = 500 kHz Auto Mode
Figure 31. LM76003-Q1 Efficiency
LM76002-Q1 LM76003-Q1 D022-LM76003-eff-24v0-300k-a-snvsak0.gif
VOUT = 24 V fSW = 300 kHz Auto Mode
Figure 33. LM76003-Q1 Efficiency
LM76002-Q1 LM76003-Q1 D024-LM76002-eff-5v0-500k-a-snvsak0.gif
VOUT = 5 V fSW = 500 kHz Auto Mode
Figure 35. LM76002-Q1 Efficiency
LM76002-Q1 LM76003-Q1 D041-tc-load-line-reg-auto-3pt3vout-400k-snvsau3.gif
VOUT = 3.3 V fSW = 400 kHz Auto Mode
Figure 37. LM76003-Q1 Load and Line Regulation
LM76002-Q1 LM76003-Q1 D036-tc-load-line-reg-auto-5vout-400k-snvsau3.gif
VOUT = 5 V fSW = 400 kHz Auto Mode
Figure 39. LM76003-Q1 Load and Line Regulation
LM76002-Q1 LM76003-Q1 D017-LM76003-load-line-reg-5v0-1000k-a-snvsak0.gif
VOUT = 5 V fSW = 1000 kHz Auto Mode
Figure 41. LM76003-Q1 Load and Line Regulation
LM76002-Q1 LM76003-Q1 D019-LM76003-load-line-reg-5v0-2200k-a-snvsak0.gif
VOUT = 5 V fSW = 2200 kHz Auto Mode
Figure 43. LM76003-Q1 Load and Line Regulation
LM76002-Q1 LM76003-Q1 D021-LM76003-load-line-reg-12v0-500k-a-snvsak0.gif
VOUT = 12 V fSW = 500 kHz Auto Mode
Figure 45. LM76003-Q1 Load and Line Regulation
LM76002-Q1 LM76003-Q1 D023-LM76003-load-line-reg-24v0-300k-a-snvsak0.gif
VOUT = 24 V fSW = 300 kHz Auto Mode
Figure 47. LM76003-Q1 Load and Line Regulation
LM76002-Q1 LM76003-Q1 D025-LM76002-load-line-reg-5v0-500k-a-snvsak0.gif
VOUT = 5 V fSW = 500 kHz Auto Mode
Figure 49. LM76002-Q1 Load and Line Regulation
LM76002-Q1 LM76003-Q1 D043-tc-dropout-3pt3vout-400k-snvsau3.gif
VOUT = 3.3 V fSW = 400 kHz Auto Mode
Figure 51. LM76003-Q1 Dropout Curve
LM76002-Q1 LM76003-Q1 D028-LM76003-dropout-5v0-1000k-snvsak0.gif
VOUT = 5 V fSW = 1000 kHz Auto Mode
Figure 53. LM76003-Q1 Dropout Curve
LM76002-Q1 LM76003-Q1 D030-LM76002-dropout-5v0-500k-snvsak0.gif
VOUT = 5 V fSW = 500 kHz Auto Mode
Figure 55. LM76002-Q1 Dropout Curve
LM76002-Q1 LM76003-Q1 D032-LM76003-dropout-24v0-300k-snvsak0.gif
VOUT = 24 V fSW = 300 kHz Auto Mode
Figure 57. LM76003-Q1 Dropout Curve
LM76002-Q1 LM76003-Q1 Switching_waveform_5v-500k_no_load_FPWM_mode.gif
VIN = 12 V VOUT = 5 V fSW = 500 kHz
No Load FPWM Mode
Figure 59. LM76003-Q1 Switching Waveform and Output Ripple
LM76002-Q1 LM76003-Q1 Switching_waveform_5v_500k_100mA_load_FPWM_mode.gif
VIN = 12 V VOUT = 5 V fSW = 500 kHz
100-mA Load FPWM Mode
Figure 61. LM76003-Q1 Switching Waveform and Output Ripple
LM76002-Q1 LM76003-Q1 Startup_vin12v_3V3_500k_no_load_fpwm.gif
VIN = 12 V VOUT = 3.3 V fSW = 500 kHz
No Load FPWM Mode
Figure 63. LM76003-Q1 Start-up Waveform
LM76002-Q1 LM76003-Q1 Startup_vin12v_5V_500k_no_load_fpwm.gif
VIN = 12 V VOUT = 5 V fSW = 500 kHz
No Load FPWM Mode
Figure 65. LM76003-Q1 Start-up Waveform
LM76002-Q1 LM76003-Q1 Startup_vin12v_5V_500k_3a5_load_auto.gif
VIN = 12 V VOUT = 5 V fSW = 500 kHz
3.5-A Load
Figure 67. LM76003-Q1 Start-up Waveform
LM76002-Q1 LM76003-Q1 Startup_LM76002_5V_500k_2A5_load_fpwm.gif
VIN = 12 V VOUT = 5 V fSW = 500 kHz
2.5-A Load
Figure 69. LM76002-Q1 Start-up Waveform
LM76002-Q1 LM76003-Q1 Startup-Prebiased_LM76002_5V-500k_no-load_fpwm.gif
VIN = 12 V VOUT = 5 V fSW = 500 kHz
No Load FPWM Mode
Figure 71. LM76002-Q1 Start-up With Pre-Biased Output
LM76002-Q1 LM76003-Q1 LoadTransient_3V3-500k_10ma-to-3A5-to-10mA_Auto.gif
VIN = 12 V VOUT = 3.3 V fSW = 500 kHz
10 mA to 3.5 A to 10 mA Auto Mode
Figure 73. LM76003-Q1 Load Transient
LM76002-Q1 LM76003-Q1 LoadTransient_5V-500k_10ma-to-3A5-to-10mA_Auto.gif
VIN = 12 V VOUT = 5 V fSW = 500 kHz
10 mA to 3.5 A to 10 mA Auto Mode
Figure 75. LM76003-Q1 Load Transient
LM76002-Q1 LM76003-Q1 LoadTransient_5V-1M0_10ma-to-3A5-to-10mA_Auto.gif
VIN = 12 V VOUT = 5 V fSW = 1000 kHz
10 mA to 3.5 A to 10 mA Auto Mode
Figure 77. LM76003-Q1 Load Transient
LM76002-Q1 LM76003-Q1 LoadTransient_5V-2M2_10ma-to-3A5-to-10mA_Auto.gif
VIN = 12 V VOUT = 5 V fSW = 2200 kHz
10 mA to 3.5 A to 10 mA Auto Mode
Figure 79. LM76003-Q1 Load Transient
LM76002-Q1 LM76003-Q1 LoadTransient_12V-500k_10ma-to-3A5-to-10mA_Auto.gif
VIN = 24 V VOUT = 12 V fSW = 500 kHz
10 mA to 3.5 A to 10 mA Auto Mode
Figure 81. LM76003-Q1 Load Transient
LM76002-Q1 LM76003-Q1 Load-Transient_LM76002_5V-500k_10mA-to-2A5-to-10ma_auto.gif
VIN = 12 V VOUT = 5 V fSW = 500 kHz
10 mA to 2.5 A to 10 mA Auto Mode
Figure 83. LM76002-Q1 Load Transient
LM76002-Q1 LM76003-Q1 EMI_5V400k_Cond_3A_lowfreq_QS.gif
VIN = 13.5 V VOUT = 5 V IOUT = 3.5 A
fSW = 400 kHz
LM76003EVM-400k, CFLT = 4 × 2.2 µF, LFLT = 1 µH
Figure 85. LM76003-Q1 Conducted EMI Result vs. CISPR25 Limits - Low Frequency
LM76002-Q1 LM76003-Q1 EMI_5V400k_Rad_3A_lowfreq_QS.gif
VIN = 13.5 V VOUT = 5 V IOUT = 3.5 A
fSW = 400 kHz
LM76003EVM-400k, CFLT = 4 × 2.2 µF, LFLT = 1 µH
Figure 87. LM76003-Q1 Radiated EMI Result vs. CISPR25 Limits - Low Frequency
LM76002-Q1 LM76003-Q1 D040-tc-eff-fpwm-3pt3vout-400k-snvsau3.gif
VOUT = 3.3 V fSW = 400 kHz FPWM Mode
Figure 24. LM76003-Q1 Efficiency
LM76002-Q1 LM76003-Q1 D035-tc-eff-fpwm-5vout-400k-snvsau3.gif
VOUT = 5 V fSW = 400 kHz FPWM Mode
Figure 26. LM76003-Q1 Efficiency
LM76002-Q1 LM76003-Q1 D016-LM76003-eff-5v0-1000k-f-snvsak0.gif
VOUT = 5 V fSW = 1000 kHz FPWM Mode
Figure 28. LM76003-Q1 Efficiency
LM76002-Q1 LM76003-Q1 D018-LM76003-eff-5v0-2200k-f-snvsak0.gif
VOUT = 5 V fSW = 2200 kHz FPWM Mode
Figure 30. LM76003-Q1 Efficiency
LM76002-Q1 LM76003-Q1 D020-LM76003-eff-12v0-500k-f-snvsak0.gif
VOUT = 12 V fSW = 500 kHz FPWM Mode
Figure 32. LM76003-Q1 Efficiency
LM76002-Q1 LM76003-Q1 D022-LM76003-eff-24v0-300k-f-snvsak0.gif
VOUT = 24 V fSW = 300 kHz FPWM Mode
Figure 34. LM76003-Q1 Efficiency
LM76002-Q1 LM76003-Q1 D024-LM76002-eff-5v0-500k-b-snvsak0.gif
VOUT = 5 V fSW = 500 kHz FPWM Mode
Figure 36. LM76002-Q1 Efficiency
LM76002-Q1 LM76003-Q1 D042-tc-load-line-reg-fpwm-3pt3vout-400k-snvsau3.gif
VOUT = 3.3 V fSW = 400 kHz FPWM Mode
Figure 38. LM76003-Q1 Load and Line Regulation
LM76002-Q1 LM76003-Q1 D037-tc-load-line-reg-fpwm-5vout-400k-snvsau3.gif
VOUT = 5 V fSW = 400 kHz FPWM Mode
Figure 40. LM76003-Q1 Load and Line Regulation
LM76002-Q1 LM76003-Q1 D017-LM76003-load-line-reg-5v0-1000k-F-snvsak0.gif
VOUT = 5 V fSW = 1000 kHz FPWM Mode
Figure 42. LM76003-Q1 Load and Line Regulation
LM76002-Q1 LM76003-Q1 D019-LM76003-load-line-reg-5v0-2200k-f-snvsak0.gif
VOUT = 5 V fSW = 2200 kHz FPWM Mode
Figure 44. LM76003-Q1 Load and Line Regulation
LM76002-Q1 LM76003-Q1 D021-LM76003-load-line-reg-12v0-500k-f-snvsak0.gif
VOUT = 12 V fSW = 500 kHz FPWM Mode
Figure 46. LM76003-Q1 Load and Line Regulation
LM76002-Q1 LM76003-Q1 D023-LM76003-load-line-reg-24v0-300k-f-snvsak0.gif
VOUT = 24 V fSW = 300 kHz FPWM Mode
Figure 48. LM76003-Q1 Load and Line Regulation
LM76002-Q1 LM76003-Q1 D025-LM76002-load-line-reg-5v0-500k-f-snvsak0.gif
VOUT = 5 V fSW = 500 kHz FPWM Mode
Figure 50. LM76002-Q1 Load and Line Regulation
LM76002-Q1 LM76003-Q1 D038-tc-dropout-5vout-400k-snvsau3.gif
VOUT = 5 V fSW = 400 kHz Auto Mode
Figure 52. LM76003-Q1 Dropout Curve
LM76002-Q1 LM76003-Q1 D029-LM76003-dropout-5v0-2200k-snvsak0.gif
VOUT = 5 V fSW = 2200 kHz Auto Mode
Figure 54. LM76003-Q1 Dropout Curve
LM76002-Q1 LM76003-Q1 D031-LM76003-dropout-12v0-500k-snvsak0.gif
VOUT = 12 V fSW = 500 kHz Auto Mode
Figure 56. LM76003-Q1 Dropout Curve
LM76002-Q1 LM76003-Q1 Switching_waveform_5v_500k_no_load_Auto_mode.gif
VIN = 12 V VOUT = 5 V fSW = 500 kHz
No Load Auto Mode
Figure 58. LM76003-Q1 Switching Waveform and Output Ripple
LM76002-Q1 LM76003-Q1 Switching-waveform_5v_500k_100mA_load_Auto_mode.gif
VIN = 12 V VOUT = 5 V fSW = 500 kHz
100-mA Load Auto Mode
Figure 60. LM76003-Q1 Switching Waveform and Output Ripple
LM76002-Q1 LM76003-Q1 Startup_vin12v_3V3_500k_no-load_auto.gif
VIN = 12 V VOUT = 3.3 V fSW = 500 kHz
No Load Auto Mode
Figure 62. LM76003-Q1 Start-up Waveform
LM76002-Q1 LM76003-Q1 Startup_vin12v_5V_500k_no_load_auto.gif
VIN = 12 V VOUT = 5 V fSW = 500 kHz
No Load Auto Mode
Figure 64. LM76003-Q1 Start-up Waveform
LM76002-Q1 LM76003-Q1 Startup_vin12v_3V3_500k_3a5-load_fpwm.gif
VIN = 12 V VOUT = 3.3 V fSW = 500 kHz
3.5-A Load
Figure 66. LM76003-Q1 Start-up Waveform
LM76002-Q1 LM76003-Q1 Startup_LM76002_5V_500k_no-load_auto.gif
VIN = 12 V VOUT = 5 V fSW = 500 kHz
No Load Auto Mode
Figure 68. LM76002-Q1 Start-up Waveform
LM76002-Q1 LM76003-Q1 Startup-Prebiased_vin12v-5V-500k_no-load_fpwm.gif
VIN = 12 V VOUT = 5 V fSW = 500 kHz
No Load Auto Mode
Figure 70. LM76003-Q1 Start-up With Pre-Biased Output
LM76002-Q1 LM76003-Q1 Short-Circuit-Hiccup-behavior.gif
VIN = 12 V VOUT = 5 V fSW = 500 kHz
Auto Mode
Figure 72. LM76003-Q1 Short-Circuit Behavior With Hiccup
LM76002-Q1 LM76003-Q1 LoadTransient_3V3-500k_10ma-to-3A5-to-10mA_FPWM.gif
VIN = 12 V VOUT = 3.3 V fSW = 500 kHz
10 mA to 3.5 A to 10 mA FPWM Mode
Figure 74. LM76003-Q1 Load Transient
LM76002-Q1 LM76003-Q1 LoadTransient_5V-500k_10ma-to-3A5-to-10mA_FPWM.gif
VIN = 12 V VOUT = 5 V fSW = 500 kHz
10 mA to 3.5 A to 10 mA FPWM Mode
Figure 76. LM76003-Q1 Load Transient
LM76002-Q1 LM76003-Q1 LoadTransient_5V-1M0_10ma-to-3A5-to-10mA_FPWM.gif
VIN = 12 V VOUT = 5 V fSW = 1000 kHz
10 mA to 3.5 A to 10 mA FPWM Mode
Figure 78. LM76003-Q1 Load Transient
LM76002-Q1 LM76003-Q1 LoadTransient_5V-2M2_10ma-to-3A5-to-10mA_FPWM.gif
VIN = 12 V VOUT = 5 V fSW = 2200 kHz
10 mA to 3.5 A to 10 mA FPWM Mode
Figure 80. LM76003-Q1 Load Transient
LM76002-Q1 LM76003-Q1 LoadTransient_12V-500k_10ma-to-3A5-to-10mA_FPWM.gif
VIN = 24 V VOUT = 12 V fSW = 500 kHz
10 mA to 3.5 A to 10 mA FPWM Mode
Figure 82. LM76003-Q1 Load Transient
LM76002-Q1 LM76003-Q1 Load-Transient_LM76002_5V-500k_10mA-to-2A5-to-10ma_fpwm.gif
VIN = 12 V VOUT = 5 V fSW = 500 kHz
10 mA to 2.5 A to 10 mA FPWM Mode
Figure 84. LM76002-Q1 Load Transient
LM76002-Q1 LM76003-Q1 EMI_5V400k_Cond_3A_highfreq_QS.gif
VIN = 13.5 V VOUT = 5 V IOUT = 3.5 A
fSW = 400 kHz
LM76003EVM-400k, CFLT = 4 × 2.2 µF, LFLT = 1 µH
Figure 86. LM76003-Q1 Conducted EMI Result vs. CISPR25 Limits - High Frequency
LM76002-Q1 LM76003-Q1 EMI_5V400k_Rad_3A_highfreq_QS.gif
VIN = 13.5 V VOUT = 5 V IOUT = 3.5 A
fSW = 400 kHz
LM76003EVM-400k, CFLT = 4 × 2.2 µF, LFLT = 1 µH
Figure 88. LM76003-Q1 Radiated EMI Result vs. CISPR25 Limits - High Frequency
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