SNVS307G September   2004  – April 2016 LM5010

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and 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 Control
      6. 7.3.6 Current Limit
      7. 7.3.7 Soft Start
      8. 7.3.8 N-Channel Buck Switch and Driver
      9. 7.3.9 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown
  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 Component Selection
          1. 8.2.2.1.1  R1 and R2
          2. 8.2.2.1.2  RON, FS
          3. 8.2.2.1.3  L1
          4. 8.2.2.1.4  RCL
          5. 8.2.2.1.5  C2 and R3
          6. 8.2.2.1.6  D1
          7. 8.2.2.1.7  C1
          8. 8.2.2.1.8  C3
          9. 8.2.2.1.9  C4
          10. 8.2.2.1.10 C5
          11. 8.2.2.1.11 C6
        2. 8.2.2.2 Increasing The Current Limit Threshold
        3. 8.2.2.3 Ripple Configuration
      3. 8.2.3 Application Curves
    3. 8.3 Do's and Don'ts
  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 Community Resources
    2. 11.2 Trademarks
    3. 11.3 Electrostatic Discharge Caution
    4. 11.4 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

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6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)(1)
MIN MAX UNIT
VIN 8 75 V
VIN to GND 76 V
BST to GND 90 V
SW to GND (steady state) –1.5 V
BST to VCC 76 V
BST to SW 14 V
VCC to GND 14 V
SGND to RTN –0.3 0.3 V
SS to RTN –0.3 4 V
VIN to SW 76 V
All other inputs to GND –0.3 7 V
Lead temperature (soldering, 4 s)(2) 260 °C
Junction temperature, TJ –40 150 °C
Storage temperature, Tstg –55 150 °C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) For detailed information on soldering plastic HTSSOP and WSON packages, see Mechanical, Packaging, and Orderable Information.

6.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) ±2000 V
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) ±750
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

6.3 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)
MIN MAX UNIT
VIN Input voltage 8 75 V
IO Output current 1 A
Ext-VCC External bias voltage 8 13 V
TJ Operating junction temperature –40 125 °C

6.4 Thermal Information

THERMAL METRIC(1) LM5010 UNIT
DPR (WSON) PWP (HTSSOP)
10 PINS 14 PINS
RθJA Junction-to-ambient thermal resistance 36 41.1 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 31.9 26.5 °C/W
RθJB Junction-to-board thermal resistance 13.2 22.5 °C/W
ψJT Junction-to-top characterization parameter 0.3 0.7 °C/W
ψJB Junction-to-board characterization parameter 13.5 22.2 °C/W
RθJC(bot) Junction-to-case (bottom) thermal resistance 3 3.3 °C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953.

6.5 Electrical Characteristics

Typical values correspond to TJ = 25°C, minimum and maximum limits apply over TJ = –40°C to 125°C, VIN = 48 V, and
RON = 200 kΩ (unless otherwise noted).(1)(2)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VCC REGULATOR
VCCReg VCC regulated output 6.6 7 7.4 V
VIN - VCC ICC = 0 mA, FS < 200 kHz,
7.5 V ≤ VIN ≤ 8 V		 1.3 V
VCC output impedance (0 mA ≤ ICC ≤ 5 mA) VIN = 8 V 140 Ω
VIN = 48 V 2.5
VCC current limit VCC = 0 V 10 mA
UVLOVCC VCC undervoltage lockout threshold VCC increasing 5.8 V
UVLOVCC hysteresis VCC decreasing 145 mV
UVLOVCC filter delay 100-mV overdrive 3 µs
IIN operating current Non-switching, FB = 3 V 650 850 µA
IIN shutdown current RON/SD = 0 V 95 200 µA
SOFT-START PIN
Pullup voltage 2.5 V
Internal current source 11.5 µA
CURRENT LIMIT
ILIM Threshold Current out of ISEN 1 1.25 1.5 A
Resistance from ISEN to SGND 130 mΩ
Response time 150 ns
RON/SD PIN
Shutdown threshold Voltage at RON/SD rising 0.35 0.65 1.1 V
Threshold hysteresis Voltage at RON/SD falling 40 mV
HIGH-SIDE FET
RDS(ON) Buck switch ITEST = 200 mA 0.35 0.8 Ω
UVLOGD Gate drive UVLO VBST - VSW Increasing 3 4.3 5 V
UVLOGD Hysteresis 440 mV
REGULATION AND OVERVOLTAGE COMPARATORS (FB PIN)
VREF FB regulation threshold SS pin = steady state 2.45 2.5 2.55 V
FB overvoltage threshold 2.9 V
FB bias current 1 nA
THERMAL SHUTDOWN
TSD Thermal shutdown temperature 175 °C
Thermal shutdown hysteresis 20 °C
(1) All minimum and maximum limits are specified by correlating the electrical characteristics to process and temperature variations and applying statistical process control.
(2) The junction temperature (TJ in °C) is calculated from the ambient temperature (TA in °C) and power dissipation (PD in Watts) as follows: TJ = TA + (PD × RθJA) where RθJA (in °C/W) is the package thermal impedance provided in Thermal Information.

6.6 Switching Characteristics

Typical values correspond to TJ = 25°C, minimum and maximum limits apply over TJ = –40°C to 125°C and VIN = 48 V (unless otherwise noted)(1)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
RDS(ON) Buck switch ITEST = 200 mA 0.35 0.8 Ω
UVLOGD Gate drive UVLO VBST - VSW Increasing 3 4.3 5 V
UVLOGD Hysteresis 440 mV
OFF TIMER
tOFF Minimum OFF-time 265 ns
ON TIMER
tON - 1 ON-time VIN = 10 V, RON = 200 kΩ 2.1 2.75 3.4 µs
tON - 2 ON-time VIN = 75 V, RON = 200 kΩ 290 390 490 ns
(1) All minimum and maximum limits are specified by correlating the electrical characteristics to process and temperature variations while applying statistical process control.

6.7 Typical Characteristics

at TA = 25°C (unless otherwise noted)
LM5010 20119904.gif Figure 1. VCC vs VIN
LM5010 20119906.gif Figure 3. ICC vs Externally Applied VCC
LM5010 20119908.gif Figure 5. Voltage at RON/SD Pin
LM5010 20119911.gif Figure 7. Start-Up Sequence
LM5010 20119905.gif Figure 2. VCC vs ICC
LM5010 20119907.gif Figure 4. ON-Time vs VIN and RON
LM5010 20119910.gif Figure 6. IIN vs VIN