SNOSDF7A
May 2023 – December 2023
LM74703-Q1
,
LM74704-Q1
PRODUCTION DATA
1
1
Features
2
Applications
3
Description
4
Device Comparison Table
5
Pin Configuration and Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Switching Characteristics
6.7
Typical Characteristics
7
Parameter Measurement Information
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Input Voltage
8.3.2
Charge Pump
8.3.3
Gate Driver
8.3.4
Enable
8.3.5
FET Status Indication (FETGOOD)
8.4
Device Functional Modes
8.4.1
Shutdown Mode
8.4.2
Conduction Mode
8.4.2.1
Regulated Conduction Mode
8.4.2.2
Full Conduction Mode
8.4.2.3
Reverse Current Protection Mode
9
Application and Implementation
9.1
Application Information
9.2
Typical Application
9.2.1
Design Requirements
9.2.2
Detailed Design Procedure
9.2.2.1
Design Considerations
9.2.2.2
MOSFET Selection
9.2.2.3
Charge Pump VCAP, Input and Output Capacitance
9.2.2.4
Selection of TVS Diodes for 12-V Battery Protection Applications
9.2.2.5
Selection of TVS Diodes and MOSFET for 24-V Battery Protection Applications
9.2.3
Application Curves
9.3
Power Supply Recommendations
9.4
Layout
9.4.1
Layout Guidelines
9.4.2
Layout Example
10
Device and Documentation Support
10.1
Documentation Support
10.1.1
Related Documentation
10.2
Receiving Notification of Documentation Updates
10.3
Support Resources
10.4
Trademarks
10.5
Electrostatic Discharge Caution
10.6
Glossary
11
Revision History
12
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
DDF|8
MPDS569D
Thermal pad, mechanical data (Package|Pins)
Orderable Information
snosdf7a_oa
snosdf7a_pm
9.2.3
Application Curves
A.
Figure 9-4
ISO 7637-2 Pulse 1
Time (5 ms/DIV)
Figure 9-6
Start-up With 3-A Load
Time (0.5 ms/DIV)
Figure 9-8
Device Start-up With EN Toggle
Time (0.5 ms/DIV)
Figure 9-10
FETGOOD During Start-up With FET Short (LM74704-Q1)
Time (1 ms/DIV)
Figure 9-12
FETGOOD During Start-up With FET Off or GATE Pin Open (LM74704-Q1)
Time (1 ms/DIV)
Figure 9-5
Response to ISO 7637-2 Pulse 1
Time (2 ms/DIV)
Figure 9-7
Start-up With 5.8-A Load
Time (0.5 ms/DIV)
Figure 9-9
FETGOOD During Start-up With FET Short (LM74703-Q1)
Time (1 ms/DIV)
Figure 9-11
FETGOOD During Start-up With FET Off or GATE Pin Open (LM74703-Q1)
Figure 9-13
LM74703-Q1, LM74704-Q1 Conducted EMI Performance (150 kHz to 1 GHz)