Overview
The LM3526M-L/NOPB is a dual-port USB power switch and over-current protection device manufactured by Texas Instruments. This component is designed to meet the Universal Serial Bus (USB) standard for power switching and protection in various host port applications. It is particularly suited for notebook and desktop PCs that need to supply power to multiple USB ports. The LM3526M-L/NOPB features a compact SOIC-8 package, minimizing board space while providing robust protection and control mechanisms.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOIC (D) with 8 pins |
| Operating Temperature Range | -40°C to 125°C |
| Input Voltage Range | 2.7V to 5.5V |
| Maximum Switch Resistance | 140 mΩ |
| Maximum Standby Current | 1 µA |
| Maximum Operating Current | 200 µA |
| Minimum Continuous Load Current | 500mA |
| Short Circuit Output Current | 1A nominal |
| Protection Features | Over-current, thermal shutdown, under-voltage lockout (UVLO) |
| Logic Thresholds | 3.3V and 5.0V |
Key Features
- Compatible with USB 1.1 and USB 2.0 standards
- 1 ms fault flag delay to filter hot-plug events
- Smooth turn-on to eliminate in-rush induced voltage drop
- UL recognized component (REF# 205202)
- Dual-stage thermal protection circuit for individual and overall device protection
- Small SOIC-8 package to minimize board space
- Under-voltage lockout (UVLO) and over-current protection
- Status flag for fault indication
Applications
The LM3526M-L/NOPB is ideal for various applications, including:
- Notebook and desktop PCs with multiple USB ports
- Root and self-powered hubs
- Embedded and stand-alone hubs
- Device-based in-rush current limiting for 3.3V USB peripherals
Q & A
- What is the primary function of the LM3526M-L/NOPB?
The LM3526M-L/NOPB is a dual-port USB power switch and over-current protection device. - What is the input voltage range of the LM3526M-L/NOPB?
The input voltage range is 2.7V to 5.5V. - What type of package does the LM3526M-L/NOPB use?
The component is packaged in an SOIC (D) with 8 pins. - What is the maximum switch resistance of the LM3526M-L/NOPB?
The maximum switch resistance is 140 mΩ. - Does the LM3526M-L/NOPB have thermal protection?
Yes, it features a dual-stage thermal protection circuit. - What is the minimum continuous load current for the LM3526M-L/NOPB?
The minimum continuous load current is 500mA. - Is the LM3526M-L/NOPB compatible with USB standards?
Yes, it is compatible with USB 1.1 and USB 2.0 standards. - What is the purpose of the 1 ms fault flag delay?
The 1 ms fault flag delay filters hot-plug events to prevent erroneous overcurrent reporting. - Does the LM3526M-L/NOPB support both 3.3V and 5.0V logic thresholds?
Yes, it supports both 3.3V and 5.0V logic thresholds. - What are some common applications for the LM3526M-L/NOPB?
Common applications include notebook and desktop PCs, root and self-powered hubs, and embedded and stand-alone hubs.
