Features Compatible with USB1.1 and USB 2.0 1 ms Fault Flag Delay During Hot-Plug Events Smooth Turn-On Eliminates Inrush Induced Voltage Drop UL Recognized Component: REF # 205202 1A Nominal Short Circuit Output Current Protects Notebook 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 Switch Resistance <= 120 m Max. at VIN = 5V 1µA Max Standby Current 100 µA Max Operating Current Undervoltage Lockout (UVLO) Description The LM3525 provides Universal Serial Bus standard power switch and over-current protection for all host port applications. The single port device is ideal for Notebook PC and Handheld PC applications that supply power to one port. A 1 ms delay on fault flag output prevents erroneous overcurrent reporting caused by inrush currents during the hot-plug events. The LM3525 accepts an input voltage between 2.7V and 5.5V allowing use as a device-based inrush current limiter for 3.3V USB peripherals, as well as Root and Self-Powered Hubs at 5.5V. The Enable input accepts both 3.3V and 5.0V logic thresholds. The small size, low RON, and 1 ms fault flag delay make the LM3525 a good choice for root hubs as well as ganged power control in space-critical self-powered 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 Inrush Limiting General Purpose High Side Switch Applications

Also Recommended LM3526▲ Dual Port USB Switch LM3544▲ Quad Port USB Power Switch LM3543▲ Triple Port USB Power Switch

Typical Application click for larger image	Connection Diagram click for larger image
Typical Performance click for larger image

Datasheets

Title		Size	Date	Other Language
	LM3525 Single Port USB Power Switch and Over-current Protection	663 Kbytes	7-Apr-05	日本語

Other Technical Documents

Title		Type	Date
	A USB-Powered Lithium-Ion Battery Charger	App Note	2003-03-06

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM3525M-H/NOPB LM3525M-H RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 217 AVNET-EM Worldwide 266 DIGI-KEY Worldwide 1507 FARNELL Europe and Asia 546 MOUSER Worldwide 500 NEWARK Americas 351 TAYLOR Americas 217	$0.69 each at 1K+ pcs	rail of 95
LM3525M-L/NOPB LM3525M-L RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 578 AVNET-EM Worldwide 1949 DIGI-KEY Worldwide 3287 FARNELL Europe and Asia 1088 MOUSER Worldwide 2307 NEWARK Americas 235 RS COMPONENTS Worldwide 130 TAYLOR Americas 1350	$0.69 each at 1K+ pcs	rail of 95
LM3525MX-H/NOPB LM3525MX-H RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 7500 AVNET-EM Worldwide 2500 DIGI-KEY Worldwide 0 MOUSER Worldwide 2400 RSL MICRO Asia Pacific 5000 TAYLOR Americas 7500 TECHMOSA Asia Pacific 2500	$0.69 each at 1K+ pcs	reel of 2500
LM3525MX-L/NOPB LM3525MX-L RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 5000 AVNET-EM Worldwide 2500 DIGI-KEY Worldwide 0 MOUSER Worldwide 2372 TAYLOR Americas 5000	$0.69 each at 1K+ pcs	reel of 2500

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM3525.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM3525 is located at RoHS Status.

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LM3525M-H/NOPB LM3525M-H	69.761 70.001	SOIC NARROW	8	1 1	260 235	Detail	Download	N/A	NSZXTT 3525 M-H
LM3525M-L/NOPB LM3525M-L	69.761 70.001	SOIC NARROW	8	1 1	260 235	Detail	Download	N/A	NSZXTT 3525 M-L
LM3525MX-H/NOPB LM3525MX-H	69.761 70.001	SOIC NARROW	8	1 1	260 235	Detail	Download	N/A	NSZXTT 3525 M-H
LM3525MX-L/NOPB LM3525MX-L	69.761 70.001	SOIC NARROW	8	1 1	260 235	Detail	Download	N/A	NSZXTT 3525 M-L

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM3525.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM3525 is located at RoHS Status.

CAD Symbols and Models Download LM3525 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM3525M-H	CS065	2	47473	43	0	5527000	1	1568301341
LM3525M-L	CS065	2	47473	43	0	5527000	1	1568301341
LM3525MX-H	CS065	2	47473	43	0	5527000	1	1568301341
LM3525MX-L	CS065	2	47473	43	0	5527000	1	1568301341

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.

For more information on Reliability Metrics, please click here.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM3525.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM3525 is located at RoHS Status.