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LM3525

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SNVS051D –FEBRUARY 2000–REVISED MARCH 2013

LM3525 Single Port USB Power Switch and Over-Current Protection

Check for Samples: LM3525

FEATURES

DESCRIPTION

The LM3525 provides Universal Serial Bus standard

• Compatible with USB1.1 and USB 2.0

power switch and over-current protection for all host

• 1 ms Fault Flag Delay During Hot-Plug Events

port applications. The single port device is ideal for

• Smooth Turn-On Eliminates Inrush Induced

Notebook PC and Handheld PC applications that

Voltage Drop

supply power to one port.

• UL Recognized Component: REF # 205202

A 1 ms delay on fault flag output prevents erroneous

overcurrent reporting caused by inrush currents

• 1A Nominal Short Circuit Output Current

during the hot-plug events.

Protects Notebook PC Power Supplies

• Thermal Shutdown Protects Device in Direct

The LM3525 accepts an input voltage between 2.7V

Short Condition

and 5.5V allowing use as a device-based inrush

current limiter for 3.3V USB peripherals, as well as

• 500mA Minimum Continuous Load Current

Root and Self-Powered Hubs at 5.5V. The Enable

• Small SOIC-8 Package Minimizes Board Space

input accepts both 3.3V and 5.0V logic thresholds.

• 2.7V to 5.5V Input Voltage Range

The small size, low R

, and 1 ms fault flag delay

• Switch Resistance ≤ 120 mΩ Max. at V

= 5V

make the LM3525 a good choice for root hubs as well

• 1µA Max Standby Current

as ganged power control in space-critical self-

powered hubs.

• 100 µA Max Operating Current

• Undervoltage Lockout (UVLO)

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

Typical Operating Circuit and Connection Diagram

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (17 pages)

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LM3525 www.ti.com SNVS051D – FEBRUARY 2000 – REVISED MARCH 2013 LM3525 Single Port USB Power Switch and Over-Current Protection Check for Samples: LM3525 FEATURES 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. 1 2 • • • • • • • • • • Compatible with USB1.1 and USB 2.
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LM3525 SNVS051D – FEBRUARY 2000 – REVISED MARCH 2013 www.ti.com Figure 1. LM3525M-L Figure 2. LM3525M-H These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Absolute Maximum Ratings (1) (2) Supply Voltage −0.3V to 6.0V Output Voltage −0.3V to 6.0V Voltage at All Other Pins −0.3V to 5.
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LM3525 www.ti.com SNVS051D – FEBRUARY 2000 – REVISED MARCH 2013 DC Electrical Characteristics Limits in standard typeface are for TJ = 25°C, and limits in boldface type apply over the full operating temperature range. Unless otherwise specified: VIN = 5.0V, EN = 0V (LM3525-L) or EN = VIN (LM3525-H). Symbol Parameter Conditions Min Typ Max Units 80 120 120 160 mΩ 1.0 1.5 A 0.15 10 µA 2.25 3.2 A IFO = 10 mA, VIN = 5V 6 25 IFO = 10 mA, VIN = 2.7V 8 40 IN to Out pins VIN = 5V VIN = 2.
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LM3525 SNVS051D – FEBRUARY 2000 – REVISED MARCH 2013 www.ti.com TYPICAL APPLICATION CIRCUIT PIN DESCRIPTION Pin Number 1 Pin Name Pin Function EN (LM3525-L) Enable (Input): Logic-compatible enable input. EN (LM3525-H) 2 FLG Fault Flag (Output): Active-low, open-drain output. Indicates overcurrent, UVLO and thermal shutdown. 3 GND Ground 4, 5 NC Not internally connected. 7 IN Supply Input: This pin is the input to the power switch and the supply voltage for the IC.
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LM3525 www.ti.com SNVS051D – FEBRUARY 2000 – REVISED MARCH 2013 Typical Performance Characteristics VIN = 5.0V, IL = 500 mA, TA = 25°C unless otherwise specified. RDSON vs VIN RDSON vs Temperature Figure 4. Figure 5. Current Limit vs Temperature Over Current Threshold vs Temperature Figure 6. Figure 7. Delay vs Temperature UVLO Threshold Figure 8. Figure 9.
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LM3525 SNVS051D – FEBRUARY 2000 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) VIN = 5.0V, IL = 500 mA, TA = 25°C unless otherwise specified. 6 Short Circuit Response Under Voltage Lock Out (UVLO) Figure 10. Figure 11. Turn-ON/OFF Delay and Rise Time/Fall Time Short Circuit Current Figure 12. Figure 13.
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LM3525 www.ti.com SNVS051D – FEBRUARY 2000 – REVISED MARCH 2013 FUNCTIONAL DESCRIPTION The LM3525-H and LM3525-L are high side P-Channel switches with active-high and active-low enable inputs, respectively. Fault conditions turn off and inhibit turn-on of the output transistor and activate the open-drain error flag transistor sinking current to the ground. INPUT AND OUTPUT IN (Input) is the power supply connection to the control circuitry and the source of the output MOSFET.
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LM3525 SNVS051D – FEBRUARY 2000 – REVISED MARCH 2013 www.ti.com Adequate capacitance must be connected to the input of the device to limit the input voltage drop during a hotplug event to less than 330 mV. For a few tens of µs, the host must supply the inrush current to the peripheral, charging its bulk capacitance to Vbus. This current is initially supplied by the input capacitor. A 33 µF 16V tantalum capacitor is recommended.
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LM3525 www.ti.com SNVS051D – FEBRUARY 2000 – REVISED MARCH 2013 Figure 15. Self-Powered Hub Per-Port Voltage Drop Typical Applications Figure 16. SIngle-Port USB Self-Powered Hub Figure 17.
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LM3525 SNVS051D – FEBRUARY 2000 – REVISED MARCH 2013 www.ti.com Figure 18.
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LM3525 www.ti.com SNVS051D – FEBRUARY 2000 – REVISED MARCH 2013 REVISION HISTORY Changes from Revision C (March 2013) to Revision D • Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant LM3525MX-H SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LM3525MX-H/NOPB SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LM3525MX-L/NOPB SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM3525MX-H SOIC D 8 2500 367.0 367.0 35.0 LM3525MX-H/NOPB SOIC D 8 2500 367.0 367.0 35.0 LM3525MX-L/NOPB SOIC D 8 2500 367.0 367.0 35.
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