SNVS252H September   2003  – November 2018 LM5007

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Typical Application Schematic
  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 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 Hysteretic Control Circuit Overview
      2. 7.3.2 High-Voltage Bias Supply Regulator
      3. 7.3.3 Overvoltage Comparator
      4. 7.3.4 On-Time Generator and Shutdown
      5. 7.3.5 Overcurrent Protection
      6. 7.3.6 N-Channel Buck Switch and Driver
      7. 7.3.7 Thermal Protection
      8. 7.3.8 Minimum Load Current
      9. 7.3.9 Ripple Configuration
    4. 7.4 Device Functional Modes
      1. 7.4.1 Standby Mode with VIN
      2. 7.4.2 Shutdown 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 Custom Design With Excel Quickstart Tool
        3. 8.2.2.3 Feedback Resistors, RFB1 and RFB2
        4. 8.2.2.4 Switching Frequency Selection, RON
        5. 8.2.2.5 Buck Inductor, L1
        6. 8.2.2.6 Output Capacitor, COUT
        7. 8.2.2.7 Type I Ripple Circuit, RC
        8. 8.2.2.8 Input Capacitor, CIN
        9. 8.2.2.9 Current Limit, RCL
      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 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 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

At TJ = 25°C, VIN = 48 V (unless otherwise noted)(1).
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
STARTUP REGULATOR
VCC VCC Regulator Output 6.6 7 7.4 V
IVCC-CL VCC Current Limit(2) 11 mA
VCC SUPPLY
VCC-UVLO VCC Undervoltage Lockout Voltage
(VCC increasing)		 6.3 V
VCC-UVLO-HYS VCC Undervoltage Hysteresis 206 mV
tVCC-UV-DELAY VCC UVLO Delay (filter) 3 µs
ICC-OPER ICC Operating Current Not switching, VFB = 3 V 500 675 µA
ISHD Shutdown/Standby Current VRON = 0 V 100 200 µA
SWITCH CHARACTERISTICS
RDS(on)1 Buck Switch On-State Resistance ISW = 0.2 A,
VBST – VSW = 6.3 V(3) 		0.74 1.34 Ω
VGATE-UV Gate Drive UVLO (VBST – VSW) Rising 3.4 4.5 5.5 V
VGATE-UV-HYS Gate Drive UVLO Hysteresis 400 mV
VDS((max) Breakdown Voltage,
VIN to RTN		 TJ = 25°C 80 V
TJ = –40°C to 125°C 76 V
VBST-VCC(max) Breakdown voltage,
BST to VCC 		TJ = 25°C 80 V
TJ = –40°C to 125°C 76 V
CURRENT LIMIT
ICL Current Limit Threshold 535 725 900 mA
tCL-RESP Current Limit Response Time ISW overdrive = 0.1 A, time to switch off 225 ns
tCL-OFF1 OFF-Time Generator (test 1) VFB = 0 V, RCL = 100 kΩ 17 µs
tCL-OFF2 OFF-Time Generator (test 2) VFB = 2.3 V, RCL = 100 kΩ 2.65 µs
ON-TIME GENERATOR
tON1 TON-1 VIN = 10 V, RON = 200 kΩ 2.15 2.77 3.5 µs
tON2 TON-2 VIN = 75 V, RON = 200 kΩ 290 390 490 ns
VSHD Remote Shutdown Threshold Rising 0.45 0.7 1.1 V
VSHD-HYS Remote Shutdown Hysteresis 40 mV
MINIMUM OFF-TIME
tOFF(min) Minimum Off-Timer VFB = 0 V 300 ns
REGULATION AND OV COMPARATORS
VREF FB Reference Threshold Internal reference, trip point for switch ON 2.445 2.5 2.550 V
VOV-REF FB Overvoltage Threshold Trip point for switch OFF 2.875 V
IFB FB Bias Current 100 nA
THERMAL SHUTDOWN
TSHD Thermal Shutdown Temperature 165 °C
THYS 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.
(2) The VCC output is intended as a self bias for the internal gate drive power and control circuits. Device thermal limitations limit external loading.
(3) For devices in the WSON-8 package, the MOSFET RDS(on) limits are specified by design characterization data only.