ZHCSJC9G September   2006  – Jaunuary 2020 LM5069

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      典型应用图
  4. 4 修订历史记录
    1.     Device Comparison
  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 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 Current Limit
      2. 7.3.2 Circuit Breaker
      3. 7.3.3 Power Limit
      4. 7.3.4 Undervoltage Lockout (UVLO)
      5. 7.3.5 Overvoltage Lockout (OVLO)
      6. 7.3.6 Power Good Pin
    4. 7.4 Device Functional Modes
      1. 7.4.1 Power Up Sequence
      2. 7.4.2 Gate Control
      3. 7.4.3 Fault Timer and Restart
      4. 7.4.4 Shutdown Control
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 48-V, 10-A Hot Swap Design
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Select RSNS and CL setting
          2. 8.2.1.2.2 Selecting the Hot Swap FET(s)
          3. 8.2.1.2.3 Select Power Limit
          4. 8.2.1.2.4 Set Fault Timer
          5. 8.2.1.2.5 Check MOSFET SOA
          6. 8.2.1.2.6 Set Undervoltage and Overvoltage Threshold
            1. 8.2.1.2.6.1 Option A
            2. 8.2.1.2.6.2 Option B
            3. 8.2.1.2.6.3 Option C
            4. 8.2.1.2.6.4 Option D
          7. 8.2.1.2.7 Input and Output Protection
          8. 8.2.1.2.8 Final Schematic and Component Values
        3. 8.2.1.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 PC Board Guidelines
      2. 10.1.2 System Considerations
    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 开发支持
    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 Glossary
  12. 12机械、封装和可订购信息

5 Pin Configuration and Functions

DGS Package
10-Pin VSSOP
Top View

Pin Functions

PIN I/O DESCRIPTION
NO. NAME
1 SENSE I Current sense input: The voltage across the current sense resistor (RS) is measured from VIN to this pin. If the voltage across RS reaches 55 mV the load current is limited and the fault timer activates.
2 VIN I Positive supply input: A small ceramic bypass capacitor close to this pin is recommended to suppress transients which occur when the load current is switched off.
3 UVLO I Undervoltage lockout: An external resistor divider from the system input voltage sets the undervoltage turnon threshold. An internal 21-µA current source provides hysteresis. The enable threshold at the pin is 2.5 V. This pin can also be used for remote shutdown control.
4 OVLO I Overvoltage lockout: An external resistor divider from the system input voltage sets the overvoltage turnoff threshold. An internal 21-µA current source provides hysteresis. The disable threshold at the pin is 2.5 V.
5 GND — Circuit ground
6 TIMER I/O Timing capacitor: An external capacitor connected to this pin sets the insertion time delay and the fault timeout period. The capacitor also sets the restart timing of the LM5069-2.
7 PWR I Power limit set: An external resistor connected to this pin, in conjunction with the current sense resistor (RS), sets the maximum power dissipation allowed in the external series pass MOSFET.
8 PGD O Power Good indicator: An open drain output. When the external MOSFET VDS decreases below 1.25 V, the PGD indicator is active (high). When the external MOSFET VDS increases above 2.5 V the PGD indicator switches low.
9 OUT I Output feedback: Connect to the output rail (external MOSFET source). Internally used to determine the MOSFET VDS voltage for power limiting, and to control the PGD indicator.
10 GATE O Gate drive output: Connect to the external MOSFET’s gate. This pin's voltage is typically 12 V above the OUT pin when enabled.
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