SNVS583H March   2009  – October 2018 LM5008A

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Typical Application, Basic Step-Down Regulator
  4. 4 Revision History
  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 Switching Characteristics
    7. 6.7 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 Control Circuit Overview
      2. 7.3.2 Start-Up Regulator (VCC)
      3. 7.3.3 Regulation Comparator
      4. 7.3.4 Overvoltage Comparator
      5. 7.3.5 On-Time Generator and Shutdown
      6. 7.3.6 Current Limit
      7. 7.3.7 N-Channel Buck Switch and Driver
      8. 7.3.8 Thermal Protection
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Mode
      2. 7.4.2 Active Mode
  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 Custom Design With WEBENCH® Tools
        2. 8.2.2.2 Selection Of External Components
        3. 8.2.2.3 Low-Output Ripple Configurations
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
      2. 11.1.2 Custom Design With WEBENCH® Tools
      3. 11.1.3 Development Support
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
        1. 11.2.1.1 PCB Layout Resources
        2. 11.2.1.2 Thermal Design Resources
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Community Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

6.5 Electrical Characteristics

TJ = 25°C and VIN = 48 V (unless otherwise noted)(1)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VCC SUPPLY
VCC Reg VCC regulator output VIN = 48 V TJ = 25°C 7 V
TJ = –40°C to 125°C 6.6 7.4
VIN – VCC 6 V < VIN < 8.5 V 100 mV
VCC bypass threshold VIN increasing 8.5 V
VCC bypass hysteresis 300 mV
VCC output impedance VIN = 6 V 100 Ω
VIN = 10 V 8.8 Ω
VIN = 48 V 0.8 Ω
VCC current limit VIN = 48 V 9.2 mA
VCC UVLO VCC increasing 5.3 V
VCC UVLO hysteresis 190 mV
VCC UVLO filter delay 3 µs
IIN operating current FB = 3 V, VIN = 48 V TJ = 25°C 550 µA
TJ = –40°C to 125°C 750
IIN shutdown current RT/SD = 0 V TJ = 25°C 110 µA
TJ = –40°C to 125°C 176
CURRENT LIMIT
Current limit threshold TJ = 25°C 0.51 A
TJ = –40°C to 125°C 0.41 0.61
Current limit response time Iswitch overdrive = 0.1 A, time to switch off 350 ns
TOFF-1 Off-time generator FB = 0 V, RCL = 100 kΩ 35 µs
TOFF-2 Off-time generator FB = 2.3 V, RCL = 100 kΩ 2.56 µs
ON-TIME GENERATOR
TON – 1 VIN = 10 V, RON = 200 kΩ TJ = 25°C 2.77 µs
TJ = –40°C to 125°C 2.15 3.5
TON – 2 VIN = 95 V, RON = 200 kΩ TJ = 25°C 300 ns
TJ = –40°C to 125°C 200 420
Remote shutdown threshold Rising TJ = 25°C 0.7 V
TJ = –40°C to 125°C 0.4 1.05
Remote shutdown hysteresis 35 mV
MINIMUM OFF-TIME
Minimum off-timer VFB = 0 V 300 ns
REGULATION AND OV COMPARATORS
FB reference threshold Internal reference, trip point for switch ON TJ = 25°C 2.5 V
TJ = –40°C to 125°C 2.445 2.55
FB overvoltage threshold Trip point for switch OFF 2.875 V
FB bias current 100 nA
THERMAL SHUTDOWN
Tsd Thermal shutdown temperature 165 °C
Thermal shutdown hysteresis 25 °C
(1) All electrical characteristics having room temperature limits are tested during production with TA = TJ = 25°C. All hot and cold limits are specified by correlating the electrical characteristics to process and temperature variations and applying statistical process control.