XRP2523EVB

XRP2523 1.5A Single Channel USB 3.0 Power Distribution Switch September 2012 Rev. 1.1.0 GENERAL DESCRIPTION APPLICATIONS The XRP2523 is a single channel integrated high-side power distribution switch optimized for self or bus-powered USB applications and compliant with the latest USB 3.0 specification. It accepts an input voltage between of 3.2V and 6.5V allowing for operations from industry standard 3.3V and 5V power rails.  Self Powered USB 2.0 and 3.0 Hubs  USB Compliant VBUS Power Distribution  Audio-Video Equipment  Portable Equipment FEATURES The XRP2523 is provided with an enable pin with integrated soft start while an error flag is available to indicate any fault conditions. With a low quiescent current as well as a small package, the XRP2523 is ideal for battery powered applications. The power-switch rise and fall times are controlled to minimize current surges during turn on/off.  1.5A Single Channel Current Switch Built-in over current, under voltage lockout (UVLO), reverse current and over temperature protections insure safe operations under abnormal operating conditions.  Soft Start XRP2523 is offered in a RoHS compliant “green”/halogen free 5-pin SOT-23 package.  UVLO, Reverse Current, Short circuit and Thermal Shutdown Protection  1.5A continuous load current  1.6A Over-current Limit  3.2V to 6.5V Input Voltage Range  USB 2.0 and USB 3.0 Compliant  Active High Enable  Channel Fault Flag Indicator  9ms Blanking Time  RoHS Compliant, Green/Halogen Free 5-Pin SOT-23 Package TYPICAL APPLICATION DIAGRAM Fig. 1: XRP2523 Application Diagram Exar Corporation 48720 Kato Road, Fremont CA 94538, USA www.exar.com Tel. +1 510 668-7000 – Fax. +1 510 668-7001 XRP2523 1.5A Single Channel USB 3.0 Power Distribution Switch ABSOLUTE MAXIMUM RATINGS OPERATING RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. Input Voltage Range VIN ............................... 3.2V to 6.5V Ambient Temperature Range ..................... -40°C to 85°C Thermal Resistance θJA .....................................250ºC/W VIN ...................................................................... 7.0V VEN, VFLG ................................................... -0.3V to 7.0V Junction Temperature .......................................... 125°C Storage Temperature .............................. -65°C to 150°C Power Dissipation ................................ Internally Limited Lead Temperature (Soldering, 10 sec).................... 260°C ESD Rating (HBM - Human Body Model) .................... 2kV ELECTRICAL SPECIFICATIONS Specifications are for an Operating Junction Temperature of TA = TJ = 25°C only; limits applying over the full Operating Junction Temperature range are denoted by a “•”. Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm at T A = 25°C, and are provided for reference purposes only. Unless otherwise indicated, VIN = 5V, CIN = COUT = 1µF, TJ = 25°C. Parameter Input Supply Voltage Min. Typ. 6.5 3.2 Input Quiescent Current 40 Input Shutdown Current 0.1 Maximum Output Current per channel Max. 1 Units Conditions V µA VIN=5V, No load µA VIN=5V, VEN=0V A 1.5 Output Leakage Current 0.5 µA VEN=0V, VOUT=0V Output MOSFET Resistance 85 mΩ IOUT=0.1A Output turn-on rise time 400 µs VIN=5V, RL=10Ω, COUT not used Output turn-off fall time 0.7 20 µs VIN=5V, RL=10Ω, COUT not used 1 Current limit threshold 1.6 2.5 3.2 A EN input threshold 0.4 0.8 1.2 V Over temperature shutdown threshold 145 °C Over temperature shutdown threshold hysteresis 20 °C Under-voltage lockout threshold 2.3 V Under-voltage lockout hysteresis 200 FLG output logic low voltage FLG blanking time FLG Off-State Current © 2012 Exar Corporation VIN rising mV 400 4 Temperature rising mV ms 9 1 2/9 µA Rev. 1.1.0 XRP2523 1.5A Single Channel USB 3.0 Power Distribution Switch BLOCK DIAGRAM Fig. 2: XRP2523 Block Diagram PIN ASSIGNMENT Fig. 3: XRP2523 Pin Assignment PIN DESCRIPTION Name Pin Number Description EN 1 Channel Enable Input Active High GND 2 Ground Signal FLG 3 Error Flag Signal Active low open drain output. Active on over-current, over-temperature, short-circuit or UVLO conditions. IN 4 Voltage Input Pin OUT 5 Voltage Output Pin ORDERING INFORMATION Part Number XRP2523ISTR-F XRP2523EVB Temperature Range Marking Package -40°C≤TA≤+85°C KCWW X 5-Pin SOT23 Packing Quantity Note 1 2.5K/Tape & Reel RoHS Compliant Halogen Free Note 2 Single Channel Active high XRP2523 Evaluation Board “YY” = Year – “WW” = Work Week – “X” = Lot Number; when applicable. © 2012 Exar Corporation 3/9 Rev. 1.1.0 XRP2523 1.5A Single Channel USB 3.0 Power Distribution Switch TYPICAL PERFORMANCE CHARACTERISTICS All data taken at V IN = 5V, C IN = 1µF, COUT = 22µF, TJ = TA = 25°C, unless otherwise specified - Schematic and BOM from Application Information section of this datasheet. Fig. 5: Output On-Resistance vs. Temperature Fig. 4: Output On-Resistance vs. Supply Voltage On-State Supply Current (µA) 70 60 50 40 30 20 Ta = 25°C 10 0 3 3.5 4 4.5 5 5.5 6 6.5 Supply Voltage (V) Fig. 6: ON-State Supply Current vs. Supply Voltage Fig. 7: ON-State Supply Current vs. Temperature Fig. 8: Current Limit Threshold vs. Supply Voltage Fig. 9: Current Limit Threshold vs. Temperature © 2012 Exar Corporation 4/9 Rev. 1.1.0 XRP2523 1.5A Single Channel USB 3.0 Power Distribution Switch Fig. 10: Flag Delay Time vs. Supply Voltage Fig. 11: Flag Delay Time vs. Temperature Fig. 12: Enable Threshold vs. Supply Voltage Fig. 13: UVLO Threshold Voltage vs. Temperature Fig. 14: Output Rising Time vs. Temperature Fig. 15: Short circuit protection VIN = 5.0V © 2012 Exar Corporation 5/9 Rev. 1.1.0 XRP2523 1.5A Single Channel USB 3.0 Power Distribution Switch Fig. 16: Turn-On/Off Characteristics COUT=1µF, RLOAD=10Ω Fig. 17: Turn-On/Off Characteristics COUT=1µF,RLOAD=5.1Ω Fig. 18: Current Limit Operation VIN = 5V, RLOAD = 2.5Ω Fig. 19: Current Limit Operation VIN = 5.2V, RLOAD = 2.5Ω © 2012 Exar Corporation 6/9 Rev. 1.1.0 XRP2523 1.5A Single Channel USB 3.0 Power Distribution Switch APPLICATION INFORMATION reported only if the condition persists continuously for longer than the blanking time of 9ms typical. The blanking time prevents erroneous reporting of current faults due to brief output current spikes. The XRP2523 device is a single channel integrated high-side power distribution switch that can be used in any self or bus powered USB applications. It is compliant with the latest USB 3.0 specifications. The reverse current protection feature prevents current to flow from OUT to IN when the device is disabled. Once activated, the error flag signal remains low until all fault conditions have been removed. CURRENT LIMIT INPUT & OUTPUT The current limit threshold is preset internally. It protects the output MOSFET switch from damages resulting from undesirable short circuit conditions or excess inrush current, which is often encountered during hot plug-in. The low limit of the current limit threshold of the XRP2523 allows a minimum current of 1.6A through the MOSFET switch. It is important to place a 1μF ceramic bypass capacitor from IN to GND as close as possible to the device in order to control supply transients. A high capacitor value can further reduce voltage droop on the input. Placing bulk capacitance of at least 22μF at the output pin reduces power supply transients under heavy current load conditions. An over-current condition is detected once the current limit threshold is exceeded, and output current is then limited to a constant current value. Triggering the current limit function is signaled by the Error Flag after 9ms of blanking time period. Furthermore, bypassing the output pin with a 0.1μF to 1μF ceramic capacitor placed close to OUT and PGND improves the device response to short-circuit transients. UNDER-VOLTAGE LOCKOUT ENABLE CONTROL Under-voltage lockout function (UVLO) keeps the internal power switch from being turned on until the power supply exceeds 2.3V typically, even if the switch is enabled. Upon detection of an input voltage below approximately 2.3V, the power switch is turned off and a fault condition is reported by the error flag signal. The device is disabled when the enable pin is in logic low condition. During this condition, the internal circuitry and the switch are turned off thereby reducing the supply current 0.1µA typical. Enable must be driven logic high for a clearly defined input. Floating the input may cause unpredictable operation. ERROR FLAG THERMAL PROTECTION The error flag signal (FLG output pin) is an open-drain output and is pulled low (active low) upon detection of the following fault conditions:     Internal thermal sensing circuitry monitors the operating temperature of the device. Upon detection of a temperature in excess of 145°C, the power switch is disabled preventing any damages to the device while a fault condition is reported by the error flag signal. A built-in 20°C hysteresis allows the device to cool down to 125°C before resuming normal operation by turning the switch on. At this time, the error flag signal is cleared. Over-current condition Over-temperature condition Short-circuit condition Under voltage lockout condition Under voltage lockout condition is flagged immediately while the over–current, overtemperature and short-circuit conditions are © 2012 Exar Corporation 7/9 Rev. 1.1.0 XRP2523 1.5A Single Channel USB 3.0 Power Distribution Switch TEST CIRCUIT PACKAGE SPECIFICATION 5-PIN SOT23 © 2012 Exar Corporation 8/9 Rev. 1.1.0 XRP2523 1.5A Single Channel USB 3.0 Power Distribution Switch REVISION HISTORY Revision Date 1.1.0 09/18/2012 Description Initial release of datasheet FOR FURTHER ASSISTANCE Email: customersupport@exar.com Exar Technical Documentation: http://www.exar.com/TechDoc/default.aspx? EXAR CORPORATION HEADQUARTERS AND SALES OFFICES 48720 Kato Road Fremont, CA 94538 – USA Tel.: +1 (510) 668-7000 Fax: +1 (510) 668-7030 www.exar.com NOTICE EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained here in are only for illustration purposes and may vary depending upon a user’s specific application. While the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. EXAR Corporation does not recommend the use of any of its products in life support applications where the failure malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances. or its in all Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited. © 2012 Exar Corporation 9/9 Rev. 1.1.0