ZHCSET9B January   2016  – June 2018 LP8758-E0

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      简化电路原理图
      2.      效率与输出电流间的关系
  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 I2C Serial Bus Timing Requirements
    7. 6.7 Switching Characteristics
    8. 6.8 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
      1. 7.1.1 Buck Information
        1. 7.1.1.1 Operating Modes
        2. 7.1.1.2 Programmability
        3. 7.1.1.3 Features
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Overview
        1. 7.3.1.1 Transition between PWM and PFM Modes
        2. 7.3.1.2 Buck Converter Load Current Measurement
        3. 7.3.1.3 Spread-Spectrum Mode
      2. 7.3.2 Power-Up
      3. 7.3.3 Regulator Control
        1. 7.3.3.1 Enabling and Disabling
        2. 7.3.3.2 Changing Output Voltage
      4. 7.3.4 Device Reset Scenarios
      5. 7.3.5 Diagnosis and Protection Features
        1. 7.3.5.1 Warnings for Diagnosis (Interrupt)
          1. 7.3.5.1.1 Output Current Limit
          2. 7.3.5.1.2 Thermal Warning
        2. 7.3.5.2 Protection (Regulator Disable)
          1. 7.3.5.2.1 Short-Circuit and Overload Protection
          2. 7.3.5.2.2 Thermal Shutdown
        3. 7.3.5.3 Fault (Power Down)
          1. 7.3.5.3.1 Undervoltage Lockout
      6. 7.3.6 Digital Signal Filtering
    4. 7.4 Device Functional Modes
      1. 7.4.1 Modes of Operation
    5. 7.5 Programming
      1. 7.5.1 I2C-Compatible Interface
        1. 7.5.1.1 Data Validity
        2. 7.5.1.2 Start and Stop Conditions
        3. 7.5.1.3 Transferring Data
        4. 7.5.1.4 I2C-Compatible Chip Address
        5. 7.5.1.5 Auto Increment Feature
    6. 7.6 Register Maps
      1. 7.6.1 Register Descriptions
        1. 7.6.1.1  OTP_REV
        2. 7.6.1.2  BUCK0_CTRL1
        3. 7.6.1.3  BUCK0_CTRL2
        4. 7.6.1.4  BUCK1_CTRL1
        5. 7.6.1.5  BUCK1_CTRL2
        6. 7.6.1.6  BUCK2_CTRL1
        7. 7.6.1.7  BUCK2_CTRL2
        8. 7.6.1.8  BUCK3_CTRL1
        9. 7.6.1.9  BUCK3_CTRL2
        10. 7.6.1.10 BUCK0_VOUT
        11. 7.6.1.11 BUCK0_FLOOR_VOUT
        12. 7.6.1.12 BUCK1_VOUT
        13. 7.6.1.13 BUCK1_FLOOR_VOUT
        14. 7.6.1.14 BUCK2_VOUT
        15. 7.6.1.15 BUCK2_FLOOR_VOUT
        16. 7.6.1.16 BUCK3_VOUT
        17. 7.6.1.17 BUCK3_FLOOR_VOUT
        18. 7.6.1.18 BUCK0_DELAY
        19. 7.6.1.19 BUCK1_DELAY
        20. 7.6.1.20 BUCK2_DELAY
        21. 7.6.1.21 BUCK3_DELAY
        22. 7.6.1.22 RESET
        23. 7.6.1.23 CONFIG
        24. 7.6.1.24 INT_TOP
        25. 7.6.1.25 INT_BUCK_0_1
        26. 7.6.1.26 INT_BUCK_2_3
        27. 7.6.1.27 TOP_STAT
        28. 7.6.1.28 BUCK_0_1_STAT
        29. 7.6.1.29 BUCK_2_3_STAT
        30. 7.6.1.30 TOP_MASK
        31. 7.6.1.31 BUCK_0_1_MASK
        32. 7.6.1.32 BUCK_2_3_MASK
        33. 7.6.1.33 SEL_I_LOAD
        34. 7.6.1.34 I_LOAD_2
        35. 7.6.1.35 I_LOAD_1
  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 Application Components
          1. 8.2.2.1.1 Inductor Selection
          2. 8.2.2.1.2 Input Capacitor Selection
          3. 8.2.2.1.3 Output Capacitor Selection
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11器件和文档支持
    1. 11.1 器件支持
      1. 11.1.1 第三方米6体育平台手机版_好二三四免责声明
    2. 11.2 文档支持
      1. 11.2.1 相关文档
    3. 11.3 接收文档更新通知
    4. 11.4 社区资源
    5. 11.5 商标
    6. 11.6 静电放电警告
    7. 11.7 术语表
  12. 12机械、封装和可订购信息

6.6 I2C Serial Bus Timing Requirements

See(1)(2)
MIN MAX UNIT
ƒSCL Serial clock frequency Standard mode 100 kHz
Fast mode 400 kHz
Fast mode + 1 MHz
High-speed mode, Cb = 100 pF 3.4 MHz
High-speed mode, Cb = 400 pF 1.7 MHz
tLOW SCL low time Standard mode 4.7 µs
Fast mode 1.3
Fast mode + 0.5
High-speed mode, Cb = 100 pF 160 ns
High-speed mode, Cb = 400 pF 320
tHIGH SCL high time Standard mode 4 µs
Fast mode 0.6
Fast mode + 0.26
High-speed mode, Cb = 100 pF 60 ns
High-speed mode, Cb = 400 pF 120
tSU;DAT Data setup time Standard mode 250 ns
Fast mode 100
Fast mode + 50
High-speed mode 10
tHD;DAT Data hold time Standard mode 0 3.45 µs
Fast mode 0 0.9
Fast mode + 0
High-speed mode, Cb = 100 pF 0 70 ns
High-speed mode, Cb = 400 pF 0 150
tSU;STA Setup time for a start or a repeated start condition Standard mode 4.7 µs
Fast mode 0.6
Fast mode + 0.26
High-speed mode 160 ns
tHD;STA Hold time for a start or a repeated start condition Standard mode 4 µs
Fast mode 0.6
Fast mode + 0.26
High-speed mode 160 ns
tBUF Bus free time between a stop and start condition Standard mode 4.7 µs
Fast mode 1.3
Fast mode + 0.5
tSU;STO Setup time for a stop condition Standard mode 4 µs
Fast mode 0.6
Fast mode + 0.26
High-speed mode 160 ns
trDA Rise time of SDA signal Standard mode 1000 ns
Fast mode 300
Fast mode + 120
High-speed mode, Cb = 100 pF 80
High-speed mode, Cb = 400 pF 160
tfDA Fall time of SDA signal Standard mode 250 ns
Fast mode 250
Fast mode + 120
High-speed mode, Cb = 100 pF 80
High-speed mode, Cb = 400 pF 160
trCL Rise time of SCL signal Standard mode 1000 ns
Fast mode 300
Fast mode + 120
High-speed Mode, Cb = 100 pF 40
High-speed Mode, Cb = 400 pF 80
trCL1 Rise time of SCL signal after a repeated start condition and after an acknowledge bit Standard mode 1000 ns
Fast mode 300
Fast mode + 120
High-speed mode, Cb = 100 pF 80
High-speed mode, Cb = 400 pF 160
tfCL Fall time of a SCL signal Standard mode 300 ns
Fast mode 300
Fast mode + 120
High-speed mode, Cb = 100 pF 40
High-speed mode, Cb = 400 pF 80
Cb Capacitive load for each bus line (SCL and SDA) 400 pF
tSP Pulse width of spike suppressed in SCL and SDA lines (spikes that are less than the indicated width are suppressed) Fast mode, fast mode + 50 ns
High-speed mode 10
(1) See Figure 1 for timing diagram.
(2) Cb refers to the capacitance of one bus line. Cb is expressed in pF units.
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