Features • Compatible with USB1.1 and USB 2.0 • 1 ms fault flag delay filters Hot-Plug events • Smooth turn-on eliminates in-rush induced voltage drop • UL recognized component: REF# 205202 • 1A nominal short circuit output current protects PC power supplies • Thermal shutdown protects device in direct short condition • 500mA minimum continuous load current • Small SO-8 package minimizes board space • 2.7V to 5.5V input voltage range • 140 m Max. switch resistance • 1 µA Max. standby current • 200 µA Max. operating current • Under-voltage lockout (UVLO) Description The LM3526 provides Universal Serial Bus standard power switch and over-current protection for all host port applications. The dual port device is ideal for Notebook and desktop PC's that supply power to more than one port. A 1 ms delay on the fault flag output prevents erroneous overcurrent reporting caused by in-rush currents during hot-plug events. The dual stage thermal protection circuit in the LM3526 provides individual protection to each switch and the entire device. In a short-circuit/over-current event, the switch dissipating excessive heat is turned off, allowing the second switch to continue to function uninterrupted. The LM3526 accepts an input voltage between 2.7V and 5.5V allowing use as a device-based in-rush current limiter for 3.3V USB peripherals, as well as Root and Self-Powered Hubs at 5.5V. The Enable inputs accept both 3.3V and 5.0V logic thresholds. The small size, low RON, and 1 ms fault flag delay make the LM3526 a good choice for root hubs as well as per-port power control in embedded and stand-alone hubs. Applications • Universal Serial Bus (USB) Root Hubs including Desktop and Notebook PC • USB Monitor Hubs • Other Self-Powered USB Hub Devices • High Power USB Devices Requiring In-rush Limiting • General Purpose High Side Switch Applications

Also Recommended LM3525▲ Single Port USB Power Switch LM3543▲ Triple USB Power Switch LM3544▲ Quad USB Power Switch MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

Datasheet

Title		Size	Date	Other Language
	LM3526 Dual Port USB Power Switch and Over-Current Protection	749 Kbytes	7-Apr-05	日本語

Featured Application Notes

Title		Size	Date	Other Language
	AN-694: Application Note 694 A DMOS 3A, 55V, H-Bridge: The LMD18200	408 Kbytes	26-Sep-02	日本語

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	AN-694: Application Note 694 A DMOS 3A, 55V, H-Bridge: The LMD18200	408 Kbytes	26-Sep-02	日本語

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM3526M-H	CS065	2	38968	52	0	4402000	1	1249079519
LM3526M-L	CS065	2	38968	52	0	4402000	1	1249079519
LM3526MX-H	CS065	2	38968	52	0	4402000	1	1249079519
LM3526MX-L	CS065	2	38968	52	0	4402000	1	1249079519

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

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