MIC2041-1YMM;MIC2040-1YMM;MIC2040-2YMM;MIC2040-1YMM TR;MIC2040-2YMM TR;中文规格书,Datasheet资料

MIC2040/2041MicrelMIC2040/2041Single Channel Low Voltage Power Distribution SwitchGeneral DescriptionThe MIC2040 and MIC2041 are high side MOSFET switchesoptimized for general purpose power distribution applicationsthat require circuit protection. The devices switch up to 5.5Vand as low as 0.8V while offering both programmable currentlimiting and thermal shutdown to protect the device and theload. A fault status output is provided in order to detectovercurrent and thermal shutdown fault conditions. Bothdevices employ soft start circuitry to minimize the inrushcurrent in applications that employ highly capacitive loads.Additionally, the MIC2040/41 is suited for multi-port USBapplications to satisfy upstream/downstream power require-ments.The MIC2041 features a auto-reset circuit breaker mode thatlatches the output off upon detecting an overcurrent conditionlasting more than 28ms. The output is reset by removing orreducing the load.Data sheets and support documentation can be found onMicrel’s web site at www.micrel.com.Features•••••••••75mΩ max. on-resistance0.8V to 5.5V operating rangeAdjustable current limitUp to 1.5A continuous output currentShort circuit protection with thermal shutdownCircuit breaker mode (MIC2041)Fault status flagUndervoltage lockoutOutput MOSFET reverse current flow block whendisabled•Very fast reaction to short-circuits•Low quiescent currentApplications•••••••Docking stationsNotebook PCsPDAsBoard hot swapRAID controllersUSB peripheralsACPI power distributionOrdering InformationPart NumberStandardMIC2040-1BMMMIC2040-2BMMMIC2041-1BMMMIC2041-2BMMPb-FreeMIC2040-1YMMMIC2040-2YMMMIC2041-1YMMMIC2041-2YMMEnableActive-HighActive-LowActive-HighActive-LowXXCircuit BreakerPackage10-Pin MSOP10-Pin MSOP10-Pin MSOP10-Pin MSOPTypical Application

C20.1µFMIC2040-1BM6+3.3VPowerSupplyINC34.7µFC10.1µFR120kΩVBIASVINEN/FAULTILIMGND4VOUT8,10VOUT3.3V@ 1ACLOAD33µF7, 91LogicControllerON/OFFOVERCURRENT2UVLOIN3(OPEN)5Note:BothVIN pins (7, 8) must be externally tied together.BothVOUT pins (8, 10) must be externally tied together.ILIMIT = 1A.RSET340ΩMicrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com

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January 20051

M9999-012004

MIC2040/2041Micrel

Pin Configuration

EN1/FAULT2UVLOIN3GND4ILIM510VOUT9VIN8VOUT7VIN6VBIASMIC2040/MIC204110-Pin MSOP (MM)

Pin Description

Pin Number

12

Pin Name

EN/FAULT

Pin Function

Switch Enable Input:Gate control pin of the output MOSFET available as anactive high (–1) or active low (–2) input signal.

Fault Status Output:Open drain N-Channel device, active low. This pinindicates an overcurrent, or thermal shutdown condition. For an overcurrentevent, /FAULT is asserted if the duration of the overcurrent condition lastslonger than 28ms.

Ground Connection:Tie to analog ground.

Current Limit Set:A resistor, RSET, connected to this pin sets the currentlimit threshold as CLF/RSET, where CLF is the current limit factor specified inthe electrical characteristics table. For the MIC2040/41, the continuousoutput current range is 0.25A to 1.5A.

Switch Input Supply:The drain of the output MOSFET. The range of inputfor the switch is 0.8V to 5.5V. These pins must be externally connectedtogether.

Switch Output:The source of the output MOSFET. These pins must beexternally connected together.

Bias Supply Input:This input pin supplies bias to operate the switch withrange from 1.6V to 5.5V. When switching voltage (VIN) is between 1.6V to5.5V and the use of a single supply is desired, connect VBIAS to VINexternally.

Undervoltage Lockout Adjust Input:With this pin left open, the UVLO

threshold is internally set to 1.45V. When the switching voltage (VIN) is at orbelow 1.6V, connecting an external resistive divider to this input will lowerthe UVLO threshold. The total resistance must be less than 200kΩ. See“Applications Information” for further detail.

45

GNDILIM

7, 9VIN

8, 106

VOUTVBIAS

3UVLOIN

M9999-012004

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2January 2005

MIC2040/2041Micrel

Absolute Maximum Ratings(1)

VIN and VBIAS..................................................................................6V/FAULT, PWRGD Output Voltage...................................6V/FAULT, PWRGD Output Current..............................25mAJunction Temperature Range...................Internally LimitedESD Rating(3)

Human Body Model...................................................2kVMachine Model........................................................200V

Operating Ratings(2)

Supply Voltage

VIN...............................................................0.8V to 5.5V VBIAS...........................................................1.6V to 5.5VContinuous Output Current...........................0.25A to 1.5AAmbient Temperature (TA)...........................–40°C to 85°CPackage Thermal Resistance (Rθ(J-A))

MSOP................................................................160°C/W

Electrical Characteristics(4)

VIN = VBIAS = 5V. TA = 25°C unless specified otherwise. Bold indicates –40°C to +85°C.SymbolVINVBIASIBIAS

Parameter

Switch Input VoltageBias Supply Voltage

VBIAS Supply Current - Switch OFFVBIAS Supply Current - Switch ONNote 5

Enable Input Voltage

VIL(max)VIH(min)

VENHYSIENRDS(ON)ILEAKCLFVLATCHILATCHVOLIOFFVUVVUVHYSVUVINTHVUVINHYS

Enable Input Threshold HysteresisEnable Input CurrentSwitch ResistanceOutput Leakage CurrentCurrent Limit Factor(6)Output Reset ThresholdLatched Output Off CurrentOutput low voltage(/FAULT)

/FAULT Off Current

Undervoltage Lockout ThresholdUndervoltage LockoutThreshold Hysteresis

UVLO Adjust Pin Threshold VoltageUVLO Adjust Pin Threshold HysteresisOvertemperature Threshold

Notes:

1.Exceeding the absolute maximum rating may damage the device.2.The device is not guaranteed to function outside its operating rating.

3.Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.4.Specification for packaged product only.

5.OFF is VEN < 1.0V for MIC2040/MIC2041–1 and VEN > 4.0V for MIC2040/MIC2041 –2. ON is VEN > 4.0V for MIC2040/MIC2041–1 and

VEN < 1.0V for MIC2040/MIC2041 –2.6.The current limit is determined as follows: ILIM = CLF/RSET.

ConditionVIN ≤ VBIASNo loadNo load

Min0.81.6

TypMax5.55.5

UnitsVVµAµAVVmV

0.12502.4

3.5

2.5100

001.5

VEN

VEN = 0V to 5.5VVIN = VBIAS = 3V, 5VIOUT = 500mAOutput off

VIN = 3V, 5V; 0.5V ≤ VOUT < 0.5VIN0.25A ≤ IOUT ≤ 1.5AVIN = 0.8V to 5.5VVOUT rising (MIC2041)Output latched off (MIC2041)IOL (/FAULT) = 15mAVFAULT = 5VVIN risingVIN falling

–1.0150

17510

µAmΩµAA•ΩV

280340VIN–.0.2

400

1350.41

mAVµAVVmV

1.301.201.451.35100

1.581.50

VIN risingVIN fallingTJ increasingTJ decreasing

20018022020020140120

240220mVmVmV°C°C

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January 20053

M9999-012004

MIC2040/2041Micrel

Electrical Characteristics(7)

SymboltFLAGtONtRtOFFtF

Note:

7.Specification for packaged product only.

Parameter

Flag Response DelayOutput Turn-on Delay,Output turn-on Rise TimeOutput Turn-off DelayOutput Turn-off Fall Time

Condition

VIN = VBIAS = 3V, 5VRLOAD = 10Ω, CLOAD = 1µFRLOAD = 10Ω, CLOAD = 1µFRLOAD = 10Ω, CLOAD = 1µFRLOAD = 10Ω, CLOAD = 1µF

Min214000.5

Typ286001124

Max358001.55

Unitsmsµsmsµsµs

Timing Diagrams

50%VEN0tONtOFF90%10%(a)MIC2040/41-1VOUT050%VEN0tONtOFF90%VOUT010%(b)MIC2040/41-2Figure 1. Turn-On/Turn-Off Delay

VEN

0VIN 0.2VIncrease the loadVOUT

0ILIMITIOUT

0tFLAG/FAULT

0Figure 2. Overcurrent Fault Response — MIC2040-2

M9999-012004

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4January 2005

MIC2040/2041Micrel

Test Circuit

VDDC20.1mFR120kWVINR220kW7,9C10.1mFMIC2040/41-xBM6VBIASVOUT8,10CLOADVINEN/FAULTILIMUVLOINGND45VOUT123R375kWR468kWRSEThttp://oneic.com/

January 20055

M9999-012004

MIC2040/2041Micrel

Typical Characteristics

Supply Currentvs. TemperatureEnable Input Threshold(Falling)vs. TemperatureEnable Input Threshold

(Rising)

vs. TemperatureVBIAS= 5.5V5003.53.532.5V EN (V)SUPPLY CURRENT (µA)450400VIN=VBIAS = 5.5V3VBIAS= 5.5V2.5V EN (V)35021.510.5VBIAS= 3VVBIAS= 1.6V21.510.5VBIAS= 3VVBIAS= 1.6V300VIN=VBIAS = 3V250200150100-40-20020406080100TEMPERATURE (°C)VIN =VBIAS =1.6V0-40-20020406080100TEMPERATURE (°C)0-40-20020406080100TEMPERATURE (°C)

3000Output Leakage Currentvs. Temperature807060RDS(mΩ) ON Resistance (RDS(ON))

vs. TemperatureCURRENT LIMIT FACTOR (V)VIN=VBIAS = 1.6VOUTPUT LEAKAGE (nA)2700240021001800150012009006003000-40-20020406080100TEMPERATURE (°C)VBIAS= 1.6VVBIAS= 5.5VVBIAS= 3V50403020100-40-20020406080100TEMPERATURE (°C)

VIN=VBIAS = 5VVIN=VBIAS = 3V400RSET = 0.4A390380370VBIAS = 1.6V360VBIAS = 3V350340330320310VBIAS = 5.5V300-40-20020406080100TEMPERATURE (°C) Current Limit Factorvs. Temperature400RSET = 0.85A390380370360VVBIAS = 3V= 1.6VBIAS 350340330320310VBIAS = 5.5V300-40-20020406080100TEMPERATURE (°C)

Current Limit Factorvs. Temperature400CURRENT LIMIT FACTOR (V)390380370360350340330320310 Current Limit Factorvs. TemperatureRSET = 1.5A300250VOL (mV) Output Low Voltagevs. TemperatureIOL (/FAULT) = 15mACURRENT LIMIT FACTOR (V)VBIAS= 5.5VVBIAS = 1.6V200VBIAS = 5.5V15010050VBIAS = 3VVBIAS = 1.6VVBIAS = 3V300-40-20020406080100TEMPERATURE (°C)

0-40-20020406080100TEMPERATURE (°C)

1.551.51.45UVLO (V)1.41.351.31.25UVLO Thresholdvs. TemperatureUVLO+UVLO (V)UVLO–1.2-40-20020406080100TEMPERATURE (°C)

240235230225UVLO+220215210205200195UVLO–190185180-40-20020406080100TEMPERATURE (°C) UVLO Adjust PinThresholdvs. Temperature5045Flag Response Delayvs. TemperatureT FLAG (ms)40353025TFLAG= 3VTFLAG= 5V20-40-20020406080100TEMPERATURE (°C)M9999-012004

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6January 2005

MIC2040/2041Micrel

Typical Characteristics (continued)

Turn On Delayvs. TemperatureOutput Rise Timevs. Temperature

800750TURN ON DELAY (µs)800750700700650600550500450400VIN=VBIAS= 5.5VTON (µs)650600550500450400VIN=VBIAS= 5.5VVIN=VBIAS= 3VVIN=VBIAS= 1.6VVIN=VBIAS= 3VVIN=VBIAS= 1.6V350-40-20020406080100TEMPERATURE (°C)350-40-20020406080100TEMPERATURE (°C)

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January 20057

M9999-012004

MIC2040/2041Micrel

Functional Diagram

MIC2040/41VREF=230mVBandgapReferencePower-OffReset6VBIAS7,9ThermalShutdownVINVIN5.3xUVLOIN38,10VOUT+1xUVLOGateControlReplicaAmp+ChargePumpEN1ILIMDelay(28ms)Latch(MIC2041)CurrentLimit+5ILIMInputLogicPower-OnResetOpenLoadDetect2/FAULTOSCErrorFlagLogic4GNDM9999-012004

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8January 2005

MIC2040/2041Micrel

Functional Characteristics

Turn-On ResponseTurn-Off ResponseEN(5V/div.)VOUT(2V/div.)VOUT(2V/div.)EN(5V/div.)IOUT(1A/div.)VIN = VBIAS =5VRLOAD = 5ΩCLOAD = 47µFTIME (1ms/div.)IOUT(1A/div.)VIN = VBIAS = 5VRLOAD = 5ΩCLOAD = 47µFTIME (500µs/div.)Latched Output - MIC2041Latched Output Reset - MIC2041EN(5V/div.)VOUT(5V/div.)/FAULT(5V/div.)VOUT(2V/div.)IOUT(1A/div.)VIN = VBIAS = 5VRLOAD = 35ΩCLOAD = 57µFTIME (5ms/div.)/FAULT(5V/div.)EN(5V/div.)VIN = VBIAS = 5VRLOAD = 35ΩCLOAD = 57µFTIME (50ms/div.)Current-Limit ResponseUVLO ResponseEN(5V/div.)/FAULT(5V/div.)VOUT(5V/div.)IOUT(500mA/div.)VIN = VBIAS = 5VRLOAD = 3.5ΩCLOAD = 47µFVOUT(1V/div.)VIN(1V/div.)IOUT(1A/div.)VEN ramps 0 to 1.6VRLOAD = 1.6ΩCLOAD = 47µFTIME (10ms/div.)TIME (5ms/div.)http://oneic.com/

January 20059

M9999-012004

MIC2040/2041Micrel

Thermal Shutdown ResponseIOUT(1A/div.)VOUT(5V/div.)/FAULT(5V/div.)EN(5V/div.)TIME (100ms/div.)M9999-012004

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10January 2005

分销商库存信息:

MICREL

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