SNVS515I September   2007  – January 2018 LM3102

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Typical Application Schematic
      2.      Efficiency vs Load Current (VOUT = 3.3 V)
  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  COT Control Circuit Overview
      2. 7.3.2  Start-Up Regulator (VCC)
      3. 7.3.3  Regulation Comparator
      4. 7.3.4  Zero Coil Current Detect
      5. 7.3.5  Overvoltage Comparator
      6. 7.3.6  Current Limit
      7. 7.3.7  N-Channel MOSFET and Driver
      8. 7.3.8  Soft-Start
      9. 7.3.9  Thermal Protection
      10. 7.3.10 Thermal Derating
    4. 7.4 Device Functional Modes
      1. 7.4.1 ON-Time Timer, 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 Design Steps for the LM3102 Application
        2. 8.2.2.2 External Components
      3. 8.2.3 Application Curve
    3. 8.3 System Examples
  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

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • YPA|28
  • PWP|20
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6.5 Electrical Characteristics

Specifications with standard type are for TJ = 25°C unless otherwise specified. Minimum and Maximum limits are specified through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless otherwise stated the following conditions apply: VIN = 18 V, VOUT = 3.3 V.
PARAMETERTEST CONDITIONSMINTYPMAXUNIT
START-UP REGULATOR, VCC
VCC VCC output voltage CCC = 680 nF, no load 6 V
over the full Operating Junction Temperature (TJ) range 5 7.2
VIN – VCC VIN – VCC dropout voltage ICC = 2 mA 50 mV
over the full Operating Junction Temperature (TJ) range 200
ICC = 20 mA 350
over the full Operating Junction Temperature (TJ) range 570
IVCCL VCC current limit(1) VCC = 0 V 65 mA
over the full Operating Junction Temperature (TJ) range 40
VCC-UVLO VCC undervoltage lockout threshold (UVLO) VIN increasing 3.75 V
over the full Operating Junction Temperature (TJ) range 3.6 3.9
VCC-UVLO-HYS VCC UVLO hysteresis VIN decreasing – HTSSOP package 130 mV
VCC-UVLO-HYS VCC UVLO hysteresis VIN decreasing – DSBGA package 150 mV
tVCC-UVLO-D VCC UVLO filter delay 3 µs
IIN IIN operating current No switching, VFB = 1 V 0.7 mA
over the full Operating Junction Temperature (TJ) range 1
IIN-SD IIN operating current, Device shutdown VEN = 0 V 25 µA
over the full Operating Junction Temperature (TJ) range 40
SWITCHING CHARACTERISTICS
RDS-UP-ON Main MOSFET RDS(on) 0.18 Ω
over the full Operating Junction Temperature (TJ) range 0.375
RDS- DN-ON Syn. MOSFET RDS(on) 0.11 Ω
over the full Operating Junction Temperature (TJ) range 0.225
VG-UVLO Gate drive voltage UVLO VBST - VSW increasing 3.3 V
over the full Operating Junction Temperature (TJ) range 4
SOFT-START
ISS SS pin source current VSS = 0.5 V 8 µA
over the full Operating Junction Temperature (TJ) range 6 10
CURRENT LIMIT
ICL Syn. MOSFET current limit threshold LM3102 2.7 A
ICL Syn. MOSFET current limit threshold LM3102TLX–1 1.5 A
ON/OFF TIMER
ton ON timer pulse width VIN = 10 V, RON = 100 kΩ 1.38 µs
VIN = 30 V, RON = 100 kΩ 0.47
ton-MIN ON timer minimum pulse width 150 ns
toff OFF timer pulse width 260 ns
ENABLE INPUT
VEN EN Pin input threshold VEN rising 1.18 V
over the full Operating Junction Temperature (TJ) range 1.13 1.23
VEN-HYS Enable threshold hysteresis VEN falling 90 mV
REGULATION AND OVERVOLTAGE COMPARATOR
VFB In-regulation feedback voltage VSS ≥ 0.8 V
TJ = −40°C to +125°C		 0.8 V
over the full Operating Junction Temperature (TJ) range 0.784 0.816
VSS ≥ 0.8 V
TJ = 0°C to +125°C		 over the full Operating Junction Temperature (TJ) range 0.788 0.812
VFB-OV Feedback overvoltage threshold 0.92 V
over the full Operating Junction Temperature (TJ) range 0.888 0.945
IFB 5 nA
THERMAL SHUTDOWN
TSD Thermal shutdown temperature TJ rising 165 °C
TSD-HYS Thermal shutdown temperature hysteresis TJ falling 20 °C
(1) VCC provides self bias for the internal gate drive and control circuits. Device thermal limitations limit external loading.