■ Output Can Be Forced Higher ThanInput (Off-State)■ Thermal Shutdown
■ 1ms Soft-Start Power Up, Fast Turn Off
ENA1FLGA2FLGBENB34SP2526A8 Pin NSIOC8OUTA7IN6GND5OUTBNow Available in Lead Free Packaging■ Active-High Version: SP2526A-1■ Active-Low Version: SP2526A-2
APPLICATIONS
■ USB Power Management■ Hot Plug-In Power Supplies■ Battery Charger Circuit
DESCRIPTION
The SP2526A device is a dual +3.0V to +5.5V USB Supervisory Power Control Switch idealfor self-powered and bus-powered Universal Serial Bus (USB) applications. Each switch haslow on-resistance (110mΩ typical) and can supply 500mA minimum. The fault currents arelimited to 1.0A typical and the flag output pin for each switch is available to indicate faultconditions to the USB controller. The thermal shutdown feature will prevent damage to thedevice when subjected to excessive current loads. The undervoltage lockout feature willensure that the device will remain off unless there is a valid input voltage present.
TYPICAL APPLICATION CIRCUIT
VCC5.0V++33µF10K4.50V TO 5.25V UPSTREAM VBUS100mA MAX10KUSB CONTROLLERSPX1521INOUTSP2526AENAFLGAFLGBOUTAIN0.1µFGNDFerrite BeadVBUSD+0.01 µFD-GNDFerrite BeadDATAVBUSD+D-+ 1µF CinGNDDATAVINON/OFFOVERCURRENTGND++10µFCout33µFOVERCURRENT*OUTBONGNDENBVBUS*33µF, 16V Tantalum, or100µF, 10V ElectrolyticBold line indicate high-current tracesFerrite BeadD+0.01 µFD-GND+*Two Port Self Powered Hub33µFFerrite BeadDATADate: 12/06/04 SP2526A Dual USB High-Side Power Switch © Copyright 2004 Sipex Corporation
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ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of the device at these ratings or any other above those indicatedin the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditionsfor extended periods of time may affect reliability.
Operating Temperature Range.............-40˚C to +85˚CSupply Voltage(VIN)..........................................7.0V
Junction Temperature Range..............................125˚CFault Flag Voltage (VFLG)..................................7.0V
Storage Temperature Range..............-65˚C to +150˚C
Fault Flag Current (IFLG)..................................50mA
Lead Temperature (10 sec. soldering)................260˚C
Enable Control Input (VEN).....................-0.3V -15V
Power Dissipation Per Package
8-pin NSOIC (derate 6.14mW/OC above +70OC).......500mW
ELECTRICAL CHARACTERISTICS
Unless otherwise noted, the following specifications apply for VIN = +5.0V, TA = 25°C.
PARAMETERSupplyCurrentEnableInputVoltage2.4EnableInputCurrentEnableInputCapacitanceOutputMosfetResistanceOutputTurn-OnDelayOutputTurn-OnRiseTimeOutputTurn-OffDelayOutputTurn-OffFallTimeOutputLeakageCurrentCurrentLimitThresholdOver-TemperatureShutdownThresholdErrorFlagOutputResistanceErrorFlagOffCurrentUVLOThreshold0.61.013512510150.012.62.425401MIN.TYP.0.751101.72.00.010.01111010010000.80.740002020101.25150MAX.5.01600.811UNITSµAVµApFmΩµsµsµsµsµAAOCONDITIONSVEN=Logic\"0\"OUT=OpenVEN=Logic\"1\"OUT=OpenVEN=Logic\"0\"VEN=Logic\"1\"VEN=Logic\"0\"VEN=Logic\"1\"RL=10ΩeachoutputRL=10ΩeachoutputRL=10ΩeachoutputRL=10ΩeachoutputCTJincreasingTJdecreasingVIN=5V,IL=10mAVIN=3.3V,IL=10mAVFLAG=5VVINincreasingVINdecreasingΩµAVDate: 12/06/04 SP2526A Dual USB High-Side Power Switch © Copyright 2004 Sipex Corporation
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PIN DESCRIPTION
PinNumber12PinNameENAFLGADescriptionEnableInputforMOSFETSwitchA.ThisinputpinisactivehighfortheSP2526A-1andactivelowfortheSP2526A-2Anactive-lowandopen-drainedfaultflagoutputfotchannelA.ItcanindicatecurrentlimitwhenENAisactive.Innormalmodeoperation(ENAor/andENBisactive),italsocanindicatethermalshudownorundervoltage.Anactive-lowandopen-drainedfaultflagoutputfotchannelB.ItcanindicatecurrentlimitwhenENBisactive.Innormalmodeoperation(ENAor/andENBisactive),italsocanindicatethermalshudownorundervoltage.EnableInputforMOSFETSwitchB.ThisinputpinisactivehighfortheSP2526A-1andactivelowfortheSP2526A-2OutputforMOSFETSwitchChannelB.ThisistheoutputpinoftheMOSFETsourceofchannelB,typicallyconnectedtotheswitchedsideoftheload.Ground.PowersupplyinputOutputforMOSFETSwitchChannelA.ThisistheoutputpinoftheMOSFETsourceofchannelA,typicallyconnectedtotheswitchedsideoftheload.3FLGB45678ENBOUTBGNDINOUTATEST CIRCUIT
10K R110K R2VCC+5VONOFFSP2526AENAFLGAOUTAIN10ΩR40.1µFC1FLGBONOFFENBGNDOUTB10ΩR4Date: 12/06/04 SP2526A Dual USB High-Side Power Switch © Copyright 2004 Sipex Corporation
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APPLICATION INFORMATION
Error Flag
An open-drained output of an N-channelMOSFET, the FLG output is pulled low tosignal the following fault conditions: inputundervoltage, output current limit, and thermalshutdown.
Current Limit
The current limit threshold is preset internally.It protects the output MOSFET switches fromdamage resulting from undesirable short circuitconditions or excess inrush current, which isoften encountered during hot plug-in. The lowlimit of the current limit threshold of theSP2526A allows a minimum current of 0.6Athrough the MOSFET switches. A current limitcondition will signal the error flag.
Thermal Shutdown
When the chip temperature exceeds 135ºC forany reason other than overcurrent fault of eitherone of the two MOSFETs, the thermal shut-down function turns off both MOSFET switchesand signals the error flag. A hysteresis of 10ºCprevents the MOSFETs from turning back onuntil the chip temperature drops below 125ºC.However, if thermal shutdown is triggered bychip temperature rise resulting from overcurrentfault condition of either one of the MOSFETswitches, the thermal shutdown function willonly turn off the switch that is in overcurrentcondition and the other switch can still remainits normal operation. In other words, the ther-mal shutdown function of the two switches isindependent of each other in the case ofovercurrent fault.
Supply Filtering
A 0.1µF to 1µF bypass capacitor from IN toGND, located near the device, is strongly recom-mended to control supply transients. Without abypass capacitor, an output short may causesufficient ringing on the input (from supply leadinductance) to damage internal control circuitry.Transient Requirements
USB supports dynamic attachment (hot plug-in)of peripherals. A current surge is caused by theinput capacitance of downstream device. Ferritebeads are recommended in series with all powerand ground connector pins. Ferrite beads reduceEMI and limit the inrush current during hot-attachment by filtering high-frequency signals.Short Circuit Transient
Bulk capacitance provides the short-term tran-sient current needed during a hot-attachment event.A 33 µF,16V tantalum or a 100µF,10V electro-lytic capacitor mounted close to downstream con-nector each port should provide transient dropprotection
Printed Circuit Layout
The Power circuitry of USB printed circuit boardsrequires a customized layout to maximize ther-mal dissipation and to minimize voltage drop andEMI.
Date: 12/06/04 SP2526A Dual USB High-Side Power Switch © Copyright 2004 Sipex Corporation
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BLOCK DIAGRAM
OUTAFLGADriverENACharge Pump ThermalShutdownCharge PumpCurrent LimitCSPower N-MOSFETUVLOINCurrent LimitCSENBFLGBDriverOUTBDate: 12/06/04 SP2526A Dual USB High-Side Power Switch © Copyright 2004 Sipex Corporation
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Power N-MOSFETTYPICAL PERFORMANCE CHARACTERISTICS
VIN = +5.0V, single MOSFET switch section, and TAMB = +25C unless otherwise noted.
O
Figure 1. Output On-Resistance vs. Supply VoltageFigure 2. Output On-Resistance vs. TemperatureRisingUVLO Threshold Voltage (V)FallingFigure 3. UVLO Threshold Voltage vs. Temperature
Figure 4. On-state Supply Current vs. Supply Voltage
Date: 12/06/04 SP2526A Dual USB High-Side Power Switch © Copyright 2004 Sipex Corporation
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Enable Threshold Voltage (V)Output-On-Resistance (millohms)On-Resistance (millohms)TYPICAL PERFORMANCE CHARACTERISTICS
VIN = +5.0V, single MOSFET switch section, and TAMB = +25OC unless otherwise noted.
Switches EnabledOffstate Supply Current (µA)Supply Current (µA)Switches DisabledFigure 5. On-state Supply Current vs. TemperatureFigure 6. Off-state Supply Current vs. TemperatureEnable Voltage RisingOffstate Supply Current (µA)Supply Current (µA)Enable Voltage FallingBoth Switches OffFigure 7. Off-state Supply Current vs. Supply VoltageFigure 8. Control Threshold vs. Supply Voltage
Date: 12/06/04 SP2526A Dual USB High-Side Power Switch © Copyright 2004 Sipex Corporation
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TYPICAL PERFORMANCE CHARACTERISTICS
VIN = +5.0V, single MOSFET switch section, and TAMB = +25OC unless otherwise noted.
Control (V)Output (V)6420531-100.51.01.52.02.5RL = 47ΩTime (mS)Figure 9. Turn-on/Turn-off Characteristics
Date: 12/06/04 SP2526A Dual USB High-Side Power Switch © Copyright 2004 Sipex Corporation
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PACKAGE: 8 Pin NSOIC
DeØE/2E1/2E1L2ESeating PlaneØ1L11LGauge PlaneØINDEX AREA(D/2 X E1/2)bVIEW CTOP VIEWAA1Seating PlaneA2SIDE VIEW8 Pin NSOIC JEDEC MO-012 (AA) VariationMINNOMMAX SYMBOLA1.35-1.75A10.1-0.25A21.25-1.65b0.31-0.51c0.17-0.244.90 BSCD6.00 BSCE3.90 BSCE11.27 BSCeL0.4-1.271.04 REFL10.25 BSCL2ø0º-8ºø15º-15ºNote: Dimensions in (mm)BBSEE VIEW CbcBASE METALSECTION B-BWITH PLATINGDate: 12/06/04 SP2526A Dual USB High-Side Power Switch © Copyright 2004 Sipex Corporation
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ORDERING INFORMATION
Part NumberTemperature RangePackage TypesSP2526A-1EN.................................................-40°C to +85°C...................................................8-pin NSOICSP2526A-1EN/TR...........................................-40°C to +85°C.................................................. 8-pin NSOICSP2526A-2EN.................................................-40°C to +85°C...................................................8-pin NSOICSP2526A-2EN/TR...........................................-40°C to +85°C.................................................. 8-pin NSOICAvailable in lead free packaging. To order add “-L” suffix to part number.Example: SP2526A-1EN/TR = standard; SP2526A-1EN-L/TR = lead free/TR = Tape and Reel
Pack quantity is 2,500 for NSOIC.
CLICK HERE TO ORDER SAMPLESCorporationANALOG EXCELLENCESipex CorporationHeadquarters andSales Office
233 South Hillview DriveMilpitas, CA 95035TEL: (408) 934-7500FAX: (408) 935-7600
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of theapplication or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others.
Date: 12/06/04 SP2526A Dual USB High-Side Power Switch © Copyright 2004 Sipex Corporation
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