Datasheet LM73100 (Texas Instruments)

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LM7310 www.ti.com
SNOSDC0A – OCTOBER 2020 – REVISED DECEMBER 2020
LM7310
SNOSDC0A – OCTOBER 2020 – REVISED DECEMBER 2020
LM73100, 2.7 - 23 V, 5.5 A Integrated Ideal Diode with Input Reverse Polarity and Overvoltage Protection 1 Features
With integrated back-to-back FETs, reverse current flow from output to input is blocked at all times, • Wide operating input voltage range: 2.7 V to 23 V making the device well suited for power MUX/ORing – 28-V absolute maximum applications. The device uses linear ORing based – Withstands negative voltages up to -15 V scheme to ensure almost zero DC reverse current • Integrated back-to-back FETs with low On- and emulates ideal diode behavior with minimum Resistance: R forward voltage drop and power dissipation. ON = 28.4 mΩ (typ) • Ideal diode operation with true reverse current Applications with particular inrush current blocking requirements can set the output slew rate with a • Fast overvoltage protection single external capacitor. Loads are protected from – 1.2-μs (typ) response time input overvoltage conditions by cutting off the output if – Adjustable overvoltage lockout (OVLO) input exceeds an adjustable overvoltage threshold. The device also provides fast trip response to • Fast-trip response to transient overcurrents during transient overcurrent events during steady state. steady state – 500-ns (typ) response time The device provides an accurate sense of the output – Latch-off after fault load current on the analog current monitor pin. • Analog load current monitor output (IMON) The device is available in a 2-mm x 2-mm, 10-pin – Current range: 0.5 A to 5.5 A HotRod QFN package for improved thermal – Accuracy: ±15% (max) (I performance and reduced system footprint. OUT ≥ 1 A) • Active high enable input with adjustable The device is characterized for operation over a undervoltage lockout threshold (UVLO) junction temperature range of –40°C to +125°C. • Adjustable output slew rate control (dVdt)
Device Information
• Overtemperature protection
PART NUMBER PACKAGE(1) BODY SIZE (NOM)
• Power Good indication (PG) with adjustable threshold (PGTH) LM73100RPW QFN (10) 2 mm x 2 mm • Small footprint: QFN 2 mm x 2 mm, 0.45-mm pitch (1) For all available packages, see the orderable addendum at the end of the data sheet.
2 Applications
• Power MUX/ORing V = 2.7 to 23 V V IN IN OUT OUT • Adapter Input Protection • Ste-top box/Smart speakers PGTH EN/UVLO • USB PD port protection C
LM73100
OUT VLOGIC • PC/Notebook/Monitors/Docks • Power Tools/Chargers OVLO PG dVdt GND IMON • POS terminals
3 Description
C R DVDT IMON The LM73100 is a highly integrated circuit protection and power management solution in a small package.
Simplified Schematic
The device provides multiple protection modes using very few external components and is a robust defense against voltage surges, reverse polarity, reverse current and excessive inrush current. Copyright © 2020 Texas Instruments Incorporated An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty Submit Document Feedback , changes, use in safety-critical applications, 1 intellectual property matters and other important disclaimers. PRODUCTION DATA. Product Folder Links: LM7310 Document Outline 1 Features 2 Applications 3 Description Table of Contents 4 Revision History 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 Timing Requirements 6.7 Switching Characteristics 6.8 Typical Characteristics 7 Detailed Description 7.1 Overview 7.2 Functional Block Diagram 7.3 Feature Description 7.3.1 Input Reverse Polarity Protection 7.3.2 Undervoltage Protection (UVLO & UVP) 7.3.3 Overvoltage Lockout (OVLO) 7.3.4 Inrush Current control and Fast-trip 7.3.4.1 Slew Rate (dVdt) and Inrush Current Control 7.3.4.2 Fast-Trip During Steady State 7.3.5 Analog Load Current Monitor Output 7.3.6 Reverse Current Protection 7.3.7 Overtemperature Protection (OTP) 7.3.8 Fault Response 7.3.9 Power Good Indication (PG) 7.4 Device Functional Modes 8 Application and Implementation 8.1 Application Information 8.2 Single Device, Self-Controlled 8.2.1 Typical Application 8.2.1.1 Design Requirements 8.2.1.2 Detailed Design Procedure 8.2.1.2.1 Setting Undervoltage and Overvoltage Thresholds 8.2.1.2.2 Setting Output Voltage Rise Time (tR) 8.2.1.2.3 Setting Power Good Assertion Threshold 8.2.1.2.4 Setting Analog Current Monitor Voltage (IMON) Range 8.2.1.3 Application Curves 8.3 Active ORing 8.4 Priority Power MUXing 8.5 USB PD Port Protection 8.6 Parallel Operation 9 Power Supply Recommendations 9.1 Transient Protection 10 Layout 10.1 Layout Guidelines 10.2 Layout Example 11 Device and Documentation Support 11.1 Documentation Support 11.1.1 Related Documentation 11.2 Receiving Notification of Documentation Updates 11.3 Support Resources 11.4 Trademarks 11.5 Electrostatic Discharge Caution 11.6 Glossary 12 Mechanical, Packaging, and Orderable Information