SNVS950C April   2014  – July 2016 LM5066I

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 SMBus Communications Timing Requirements and Definitions
    7. 7.7 Switching Characteristics
    8. 7.8 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Current Limit
      2. 8.3.2 Circuit Breaker
      3. 8.3.3 Power Limit
      4. 8.3.4 UVLO
      5. 8.3.5 OVLO
      6. 8.3.6 Power Good Pin
      7. 8.3.7 VDD Sub-Regulator
      8. 8.3.8 Remote Temperature Sensing
      9. 8.3.9 Damaged MOSFET Detection
    4. 8.4 Device Functional Modes
      1. 8.4.1 Power-Up Sequence
      2. 8.4.2 Gate Control
      3. 8.4.3 Fault Timer and Restart
      4. 8.4.4 Shutdown Control
      5. 8.4.5 Enabling/Disabling and Resetting
    5. 8.5 Programming
      1. 8.5.1 PMBus Command Support
      2. 8.5.2 Standard PMBus Commands
        1. 8.5.2.1  OPERATION (01h)
        2. 8.5.2.2  CLEAR_FAULTS (03h)
        3. 8.5.2.3  CAPABILITY (19h)
        4. 8.5.2.4  VOUT_UV_WARN_LIMIT (43h)
        5. 8.5.2.5  OT_FAULT_LIMIT (4Fh)
        6. 8.5.2.6  OT_WARN_LIMIT (51h)
        7. 8.5.2.7  VIN_OV_WARN_LIMIT (57h)
        8. 8.5.2.8  VIN_UV_WARN_LIMIT (58h)
        9. 8.5.2.9  STATUS_BYTE (78h)
        10. 8.5.2.10 STATUS_WORD (79h)
        11. 8.5.2.11 STATUS_VOUT (7Ah)
        12. 8.5.2.12 STATUS_INPUT (7Ch)
        13. 8.5.2.13 STATUS_TEMPERATURE (7dh)
        14. 8.5.2.14 STATUS_CML (7Eh)
        15. 8.5.2.15 STATUS_OTHER (7Fh)
        16. 8.5.2.16 STATUS_MFR_SPECIFIC (80h)
        17. 8.5.2.17 READ_EIN (86h)
        18. 8.5.2.18 READ_VIN (88h)
        19. 8.5.2.19 READ_IIN (89h)
        20. 8.5.2.20 READ_VOUT (8Bh)
        21. 8.5.2.21 READ_TEMPERATURE_1 (8Dh)
        22. 8.5.2.22 READ_PIN (97h)
        23. 8.5.2.23 MFR_ID (99h)
        24. 8.5.2.24 MFR_MODEL (9Ah)
        25. 8.5.2.25 MFR_REVISION (9Bh)
      3. 8.5.3 Manufacturer Specific PMBus Commands
        1. 8.5.3.1  MFR_SPECIFIC_00: READ_VAUX (D0h)
        2. 8.5.3.2  MFR_SPECIFIC_01: MFR_READ_IIN (D1h)
        3. 8.5.3.3  MFR_SPECIFIC_02: MFR_READ_PIN (D2h)
        4. 8.5.3.4  MFR_SPECIFIC_03: MFR_IN_OC_WARN_LIMIT (D3h)
        5. 8.5.3.5  MFR_SPECIFIC_04: MFR_PIN_OP_WARN_LIMIT (D4h)
        6. 8.5.3.6  MFR_SPECIFIC_05: READ_PIN_PEAK (D5h)
        7. 8.5.3.7  MFR_SPECIFIC_06: CLEAR_PIN_PEAK (D6h)
        8. 8.5.3.8  MFR_SPECIFIC_07: GATE_MASK (D7h)
        9. 8.5.3.9  MFR_SPECIFIC_08: ALERT_MASK (D8h)
        10. 8.5.3.10 MFR_SPECIFIC_09: DEVICE_SETUP (D9h)
        11. 8.5.3.11 MFR_SPECIFIC_10: BLOCK_READ (DAh)
        12. 8.5.3.12 MFR_SPECIFIC_11: SAMPLES_FOR_AVG (DBh)
        13. 8.5.3.13 MFR_SPECIFIC_12: READ_AVG_VIN (DCh)
        14. 8.5.3.14 MFR_SPECIFIC_13: READ_AVG_VOUT (DDh)
        15. 8.5.3.15 MFR_SPECIFIC_14: READ_AVG_IIN (DEh)
        16. 8.5.3.16 MFR_SPECIFIC_14: READ_AVG_PIN (DFh)
        17. 8.5.3.17 MFR_SPECIFIC_15: READ_AVG_PIN
        18. 8.5.3.18 MFR_SPECIFIC_16: BLACK_BOX_READ (E0h)
        19. 8.5.3.19 MFR_SPECIFIC_17: READ_DIAGNOSTIC_WORD (E1h)
        20. 8.5.3.20 MFR_SPECIFIC_18: AVG_BLOCK_READ (E2h)
      4. 8.5.4 Reading and Writing Telemetry Data and Warning Thresholds
      5. 8.5.5 Determining Telemetry Coefficients Empirically With Linear Fit
      6. 8.5.6 Writing Telemetry Data
      7. 8.5.7 PMBus Address Lines (ADR0, ADR1, ADR2)
      8. 8.5.8 SMBA Response
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 48-V, 10-A PMBus Hotswap Design
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design-In Procedure
          1. 9.2.1.2.1 Select RSNS and CL Setting
          2. 9.2.1.2.2 Selecting the Hotswap FETs
          3. 9.2.1.2.3 Select Power Limit
          4. 9.2.1.2.4 Set Fault Timer
          5. 9.2.1.2.5 Check MOSFET SOA
          6. 9.2.1.2.6 Set UVLO and OVLO Thresholds
            1. 9.2.1.2.6.1 Option A
            2. 9.2.1.2.6.2 Option B
            3. 9.2.1.2.6.3 Option C
            4. 9.2.1.2.6.4 Option D
          7. 9.2.1.2.7 Power Good Pin
          8. 9.2.1.2.8 Input and Output Protection
          9. 9.2.1.2.9 Final Schematic and Component Values
        3. 9.2.1.3 Application Curves
      2. 9.2.2 48-V, 20-A PMBus Hotswap Design
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
          1. 9.2.2.2.1  Selecting the Sense Resistor and CL Setting
          2. 9.2.2.2.2  Selecting the Hotswap FETs
          3. 9.2.2.2.3  Select Power Limit
          4. 9.2.2.2.4  Set Fault Timer
          5. 9.2.2.2.5  Check MOSFET SOA
          6. 9.2.2.2.6  Switching to dv/dt-Based Start-Up
          7. 9.2.2.2.7  Choosing the VOUT Slew Rate
          8. 9.2.2.2.8  Select Power Limit and Fault Timer
          9. 9.2.2.2.9  Chose Input and Output Protection and Set Undervoltage, Overvoltage, and Power Good Thresholds
          10. 9.2.2.2.10 Final Schematic and Component Values
        3. 9.2.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Trademarks
    2. 12.2 Electrostatic Discharge Caution
    3. 12.3 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

1 Features

  • 10- to 80-V Operation
  • 100-V Continuous Absolute Max
  • 26 mV or 50 mV ILIM Threshold (±10%)
  • Programmable FET SOA Protection
  • Programable UV, OV, tFAULT Thresholds
  • External FET Temperature Sensing
  • Failed FET Detection
  • I2C / SMBus Interface
  • PMBus™ and Node Manager 2.0 and 3.0 Compliant Command Structure
  • Precision V IN, VOUT, IIN, PIN, VAUX Monitoring
    • V (±1.25%); I (±1.75%); P (±2.5%)
  • Supports Energy Monitoring via Read_EIN Command
  • Programable I/V/P Averaging Interval
  • 12-bit ADC with 1-kHz Sampling Rate
  • –40°C < TJ < 125°C Operation

2 Applications

  • 48-V Servers
  • Base Station Power Distribution
  • Networking Routers and Switchers
  • PLC Power Management
  • 24- to 28-V Industrial Systems

3 Description

LM5066I provides robust protection and precision monitoring for 10- to 80-V systems. Programmable UV, OV, ILIMIT, and fast-short circuit protection allow for customized protection for any application. Programmable FET SOA protection sets the maximum power the FET is allowed to dissipate under any condition. The programmable fault timer (tFAULT) is set to avoid nuisance trips, ensure start-up, and limit the duration of over load events.

In addition to circuit protection, the LM5066I supplies real-time power, voltage, current, temperature, and fault data to the system management host through the I2C / SMBus interface. PMBus compliant command structure makes it easy to program the device. Precision telemetry enables intelligent power management functions such as efficiency optimization and early fault detection. LM5066I also supports advanced features such as I/V/P averaging and peak power measurment to improve system diagnostics.

LM5066I is pin-to-pin compatible with the LM5066 and offers improved telemetry accuracy and supports the Read_Ein command to monitor energy. See Table 1 for a detailed comparison.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
LM5066I PWP (28) 9.70 × 4.40 mm2
  1. For all available packages, see the orderable addendum at the end of the data sheet.

SPACE

Simplified Schematic

LM5066I LM5066I_Front_Page.gif

LM5066I in a Plug-in Card

LM5066I High_Level_Front.gif