SNOSDF7A May   2023  – December 2023 LM74703-Q1 , LM74704-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 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
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Input Voltage
      2. 8.3.2 Charge Pump
      3. 8.3.3 Gate Driver
      4. 8.3.4 Enable
      5. 8.3.5 FET Status Indication (FETGOOD)
    4. 8.4 Device Functional Modes
      1. 8.4.1 Shutdown Mode
      2. 8.4.2 Conduction Mode
        1. 8.4.2.1 Regulated Conduction Mode
        2. 8.4.2.2 Full Conduction Mode
        3. 8.4.2.3 Reverse Current Protection Mode
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Design Considerations
        2. 9.2.2.2 MOSFET Selection
        3. 9.2.2.3 Charge Pump VCAP, Input and Output Capacitance
        4. 9.2.2.4 Selection of TVS Diodes for 12-V Battery Protection Applications
        5. 9.2.2.5 Selection of TVS Diodes and MOSFET for 24-V Battery Protection Applications
      3. 9.2.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

Package Options

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

6.5 Electrical Characteristics

TJ = –40°C to 125°C; typical values at TJ = 25°C, V(ANODE) = 12 V, C(VCAP+) = 0.1 µF, V(EN) = 3.3 V, over operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VANODE SUPPLY VOLTAGE
V(ANODE) Operating input voltage 4 60 V
V(ANODE POR) VANODE POR rising threshold 3.9 V
VANODE POR falling threshold 2.2 2.8 3.1 V
I(SHDN) Shutdown supply current V(EN) = 0 V 1 1.5 µA
I(Q) Operating quiescent current 80 130 µA
ENABLE INPUT
V(EN_IL) Enable input low threshold 0.5 0.9 1.22 V
V(EN_IH) Enable input high threshold 1.06 2 2.6
I(EN) Enable sink current V(EN) = 12 V 3 5 µA
FETGOOD
FETGOOD High FETGOOD voltage for logic high VCAP > VCAP_UVLO, VANODE – VCATHODE < 200 mV, LM74703-Q1 4.45 5.2 6 V
RFETGOOD(pullup) FETGOOD pullup resistor VCAP > VCAP_UVLO, VANODE – VCATHODE < 200 mV, LM74703-Q1 50 kΩ
RFETGOOD(pulldown) FETGOOD pulldown resistor VCAP < VCAP_UVLO or VANODE – VCATHODE > 200 mV, LM74703-Q1 50 kΩ
RFETGOOD(pulldown) FETGOOD pulldown resistor VCAP < VCAP_UVLO or VANODE – VCATHODE > 200 mV, LM74704-Q1 1 1.3 kΩ
FETGOOD Comparator VAC comparator rising threshold for FETGOOD going low 180 200 230 mV
FETGOOD Comparator VAC comparator falling threshold for FETGOOD going high 160 185 215 mV
FETGOOD Comparator hysteresis 15 mV
VANODE to VCATHODE
V(AC_REG) Regulated forward V(AC) threshold 13 20 29 mV
V(AC_FC) V(AC) threshold for full conduction mode 34 50 57 mV
V(AC_REV) V(AC) threshold for reverse current blocking –17 –11 –2 mV
GATE DRIVE
I(GATE) Peak source current V(ANODE) – V(CATHODE) = 100 mV, 
V(GATE) – V(ANODE) = 200 mV		 3 11 mA
Peak sink current V(ANODE) – V(CATHODE) = –20 mV, 
V(GATE) – V(ANODE) = 5 V		 2370 mA
Regulation max sink current V(ANODE) – V(CATHODE) = 0 V, 
V(GATE) – V(ANODE) = 200 mV		 6 26 µA
RDSON Discharge switch RDSON V(ANODE) – V(CATHODE) = –100 mV, 
V(GATE) – V(ANODE) = 100 mV		 0.4 1 2 Ω
CHARGE PUMP
I(VCAP) Charge pump source current (charge pump on) V(VCAP+) – V(VCAP–) = 7 V 162 300 600 µA
Charge pump sink current (charge pump off) V(VCAP+) – V(VCAP–) = 14 V 5 10 µA
V(VCAP+) – V(VCAP–) Charge pump voltage at V(ANODE) = 3.2 V I(VCAP) ≤ 30 µA 8 V
Charge pump turn on voltage 10.8 12.1 12.9 V
Charge pump turn off voltage 11.6 13 13.9 V
Charge pump enable comparator hysteresis 0.54 0.9 1.36 V
V(VCAP UVLO) V(VCAP) – V(ANODE) UV release at rising edge V(ANODE) – V(CATHODE) = 100 mV 5.8 6.6 7.7 V
V(VCAP) – V(ANODE) UV threshold at falling edge V(ANODE) – V(CATHODE) = 100 mV 5.11 5.68 6 V
CATHODE
I(CATHODE) CATHODE sink current V(ANODE) = 12 V, 
V(ANODE) – V(CATHODE) = 100 mV		 1.7 2 µA
V(ANODE) – V(CATHODE) = –100 mV 1.2 2.2 µA
V(ANODE) = –12 V, V(CATHODE) = 12 V 1.25 2.06 µA