dual-input triple-output power multiplexer in psop-8l for ...plarameter ssymbo tnest condition mpi...

uP7535

1uPI Semiconductor Corp., http://www.upi-semi.comRev. P04, File Name: uP7535-DS-P0401

Dual-Input Triple-Output Power Multiplexerin PSOP-8L for USB High Side Switch

Compliant to USB SpecificationsOperating Range: 4.5 V to 5.5 VOutput Voltage Switch to 5VSB at S3/S4/S5

400mA Continuous Load Current500mΩΩΩΩΩ High Side Switch

Output Voltage Switch to 5VCC at S0/S1/S21.2A Continuous Load Current150mΩΩΩΩΩ High Side Switch

Low Quiescent Current: 100uA TypicalSlow Turn On and Fast Turn OffEnable Active-HighPb-Free (RoHS Compliant)UL Approved: E338429TuV EN60950-1 Certification

The uP7535 is a current limited, dual-input triple-outputpower multiplexer acting as a high side switch for USBapplications where heavy capacitive loads and short-circuitsare likely to be encountered. It switches output voltages to5VSB at S3/S4/S5 states with 500mΩ switches and 400mAcapacity; to 5VCC at S0/S1/S2 states with 150mΩswitches and 1.2A capacity. The outputs can be parallelledto provide totally 3.0A output current at S0/S1/S2 states.

Optimal switch logic according to S3# and 5VCC statusensures seamless output voltage transition.

When the output load exceeds the current-limit thresholdor a short is present, the uP7535 asserts over currentprotection and limits the output current to a safe level bydriving the power switches into saturation mode.

Other features include soft-start to limit inrush currentduring plug-in, thermal shutdown to prevent catastrophicswitch failure from high-current loads, under-voltage lockout(UVLO) to ensure that the device remains off unless thereis a valid input voltage present. The uP7535 is available inPSOP-8L package.

Notebook and Desktop PCsUSB Power ManagementACPI Power DistributionHot-Plug Power Supplies

rebmuNredrO epyTegakcaP gnikraMpoT

8USA5357Pu L8-POSP 8S5357Pu

8USB5357Pu L8-POSP 8SB5357Pu

:etoN.nipNEsah8USA5357Pu

nipNEonsah8USB5357Pu

General Description

Applications

Ordering Information

Pin Configuration & Typical Application Circuit

Features

Note: uPI products are compatible with the current IPC/JEDEC J-STD-020 requirement. They are halogen-free,RoHS compliant and 100% matte tin (Sn) plating that aresuitable for use in SnPb or Pb-free soldering processes.

1

2

3

4 5

6

7

8S3#

5VCC

5VCC

GND 5VSB

VOUT2

VOUT1

uP7535ASU8

VOUT3

9GND

1

2

3

4 5

6

7

8S3#

EN

5VCC

GND 5VSB

VOUT2

VOUT1

uP7535BSU8

VOUT3

9GND

VOUT11

uP7535BSU8

S3#

5VCC

8

7

6

5

VOUT1

2

3

4

VOUT2

VOUT3

5VSB

S3#

EN

5VCC

GND

VOUT3

VOUT2

5VSB

uP7535


emaNniP noitcnuFniP

#3S .niPlortnoCetatSpeelS .noitarugifnocgnihctiwsehtslortnocsutatsCCV5ehthtiwgnolanipsihT

NE .elbanEpihC .segatlovtuptuoehtselbanehgihcigoL

CCV5.CCV5morftupnIylppuS tatnerructuptuoseilppustahtniarDTEFSOMlennahC-NehtsinipsihT

sroticapacFu01muminimahtiwnipsihtsspyB.CCV5otdetcennocebdluohsdnasetats2S/1S/0S.dnuorgot

DNG .dnuorG

BSV5.tupnIylppuS setats5S/4S/3StatnerructuptuoseilppustahtniarDTEFSOMlennahC-NehtsinipsihT

sihtssapyB.ecivedehtroftnerrucgnitareposeilppusoslanipsihT.BSV5otdetcennocebdluohsdna.dnuorgotroticapacFu01muminimahtiwnip

3TUOV .3egatloVtuptuO muminimahtiwnipsihtssapyB.secruoSTEFSOMlennahC-NmorftuptuosinipsihT.dnuorgotroticapacFu01



Functional Block Diagram

Functional Pin Description

5VC

CU

VLO

5VSBU

VLO

Thermal

Shutdow

n

Switch

Logic

Charge Pum

p& C

urrent Limit

Switch

Logic

Charge Pum

p& C

urrent Limit

Switch

Logic

Charge Pum

p& C

urrent Limit

5VSB

VOU

T2

VOU

T1

VOU

T3

5VCC

S3#

GND

Q1

Q2

Q4

Q3

Q6

Q5

EN

uP7535


The uP7535 is a current limited, dual-input triple-outputpower multiplexer acting as a high side switch for USBapplications where heavy capacitive loads and short-circuitsare likely to be encountered. It switches output voltages to5VSB at S3/S4/S5 states with 500mΩ switch and 400mAcapacity; to 5VCC at S0/S1/S2 states with 150mΩ switchand 1.2A capacity. The outputs can be parallelled to providetotally 3A output current at S0/S1/S2 states.


When the output load exceeds the current-limit thresholdor a short is present, the uP7535 asserts overcurrentprotection and limits the output current to a safe level bydriving the power switches into saturation mode.


Power SwitchesEach output contains two N-Channel MOSFETs Q1/Q3/Q5 and Q2/Q4/Q6 as power switches that supply outputcurrent to VOUT pins. The sources of Q1/Q3/Q5 and Q2/Q4/Q6 are connected together to the VOUT1/VOUT2/VOU3respectively, the drain of Q1/Q3/Q5 are connected to 5VCCpins and the drain of Q2/Q4/Q6 are connected to 5VSBpin. The MOSFETs are without body diode and preventcurrent flows when turned off.

Q2/Q4/Q6 are 500mΩ MOSFETs with 400mA capacity andQ1/Q3/Q5 are 150mΩ MOSFETs with 1.2A capacity. Thepower switches are driven by internal charge pumps andcontrolled by S3# and 5VCC status. The uP7535 switchesthe output voltages to 5VSB through Q2/Q4/Q6 at S3/S4/S5 states, to 5VCC through Q1/Q3/Q5 at S0/S1/S2 states.

Charge Pumps and DriversAn internal charge pump supplies power to the driver circuitand provides the necessary voltage to pull the gate of theMOSFET above the source. The driver controls the gatevoltage of the power switch. To limit large current surgesand reduce the associated electromagnetic interference(EMI) produced, the driver incorporates circuitry thatcontrols the rise times and fall times of the output voltage.

Chip Enable and Soft Start

Pulling the EN pin lower than 0.4V disables the outputvoltages and reduces its quiescent current down to 1uAtypically. Pulling the EN pin higher than 1.5V enables theoutput voltages. The uP7535 features soft start function toeliminate the inrush current into downstream and voltagedroop of upstream when hot-plug-in with capacitive loads.The soft start interval is 1.3ms typically. The input currentto charge up the load capacitor is proportional to itscapacitance. The uP7535 current limit function may beactive during the plug-in of extreme large capacitive load.

Over Current LimitThe uP7535 continuously monitors the output current forover current protection to protect the system power, thepower switch, and the load from damage during output short

Functional Description

Figure 1. Typical Timing Diagram

5VSB

EN

5VSB_DRV

VOUT

S3#

5VCC

5VCC_DRV

T1 T2 T3T4

T5T6

T7T8

T9 T10

uP7535


circuit or soft start interval. When an overload or short circuitis encountered, the current-sense circuitry sends a controlsignal to the driver. The driver in turn reduces the gatevoltage and drives the power FET into its saturation region,which switches the output into a constant-current modeand holds the current constant while varying the voltage onthe load. The current limit level is typical 1.8A when thepower switch operates in linear region and is typical 1.5Ain saturation region.

Undervoltage LockoutA voltage sense circuit monitors the input voltage. Whenthe input voltage is below approximately 4.3V, a controlsignal turns off the power switch.

Overtemperature ProtectionThe uP7535 continuously monitor the operating temperatureof the power switch for overtemperature protection. TheuP7535 asserts overtemperature and turns off the powerswitch to prevent the device from damage if the junctiontemperature rises to approximately 135OC due overcurrentor short-circuit conditions. Hysteresis is built into thethermal sense, the switch will not turns back on until thedevice has cooled approximately 20 degrees. If the faultcondition is not removed, the switch will pulse on and offas the temperature cycles between these limits.

Functional Description

uP7535


(5VSB = 5V, TA = 25OC, unless otherwise specified)

Supply Input Voltage, 5VSB (Note 1) ----------------------------------------------------------------------------------------------- -0.3V to +5.7VSupply Input Voltage, 5VSB Compliant with LPS (Limited Power Source) Requirement --------------------------- < 8A/100VAOther Pins ------------------------------------------------------------------------------------------------------------------------------------- -0.3V to +5.7VStorage Temperature Range ----------------------------------------------------------------------------------------------------------- -65OC to +150OCJunction Temperature ------------------------------------------------------------------------------------------------------------------------------------ 150OCLead Temperature (Soldering, 10 sec) ------------------------------------------------------------------------------------------------------------ 260OCESD Rating (Note 2)

HBM (Human Body Mode) --------------------------------------------------------------------------------------------------------------------- 2kVMM (Machine Mode) ----------------------------------------------------------------------------------------------------------------------------- 200V

Package Thermal Resistance (Note 3)PSOP-8L θJA ------------------------------------------------------------------------------------------------------------------------------ 50°C/W

Power Dissipation, PD @ TA = 25°CPSOP-8L ------------------------------------------------------------------------------------------------------------------------------------------ 2.0W

Operating Junction Temperature Range (Note 4) ------------------------------------------------------------------------ -40°C to +125°COperating Ambient Temperature Range -------------------------------------------------------------------------------------- -40°C to +85°CSupply Input Voltage, 5VSB ------------------------------------------------------------------------------------------------------ +4.5V to +5.5V

retemaraP lobmyS snoitidnoCtseT niM pyT xaM stinU

BSV5tupnIylppuS

egnaRegatloVtupnIyppuS 5.4 -- 5.5 V

tnerruCtupnIylppuS -- 52.2 5.4 A

tuokcoLegatloVrednU V OLVU gnisirBSV5 -- 3.4 5.4 V

siseretsyHOLVU -- 002 -- Vm

tnerruCtnecseiuQ IQ V0=CCV5,0=#3S,xTUOVnodaoloN -- 001 051 Au

tnerruCtnecseiuQ IQ V5=CCV5=#3S,xTUOVnodaoloN -- 002 003 Au

tnerruCnwodtuhS I NDHS .V5=CCV5=#3S,V0=NE -- 1 5 Au

CCV5tupnIylppuS

egnaRegatloVtupnIylppuS 5.4 -- 5.5 V

tnerruCtupnIylppuS -- 4.5 8.01 A

tuokcoLegatloVrednU V OLVU gnisirCCV5 -- 3.4 5.4 V

siseretsyHOLVU -- 002 -- Vm

)6Q/4Q/2Q(BSV5rofhctiwSrewoP

ecnaitseRNOTEFSOM-N R )NO(SD I TUO Am003= -- 005 057 mΩ

tnerruCegkaeLesreveR V TUO V0=BSV5,V5.5= -- -- 1 Au

Absolute Maximum Rating

Thermal Information

Recommended Operation Conditions

Electrical Characteristics

uP7535


Note 1. Stresses beyond those listed as the above Absolute Maximum Ratings may cause permanent damage tothe device. These are for stress ratings only. Functional operation of the device at these or any otherconditions beyond those indicated in the Recommended Operation Condition section of the specifications isnot implied. Exposure to absolute maximum rating conditions for extended periods may remain possibilityto affect device reliability.

Note 2. Devices are ESD sensitive. Handling precaution recommended.Note 3. θJA is measured in the natural convection at TA = 25°C on a low effective thermal conductivity test board of

JEDEC 51-3 thermal measurement standard.Note 4. The device is not guaranteed to function outside its operating conditions.Note 5. These items are not tested in production, specified by design.

Electrical CharacteristicsretemaraP lobmyS snoitidnoCtseT niM pyT xaM stinU

)5Q/3Q/1Q(CCV5rofsehctiwSrewoP

ecnatsiseRNOTEFSOM-N R )NO(SD I TUO A1= -- 051 522 mΩ

tnerruCegakaeLesreveR V TUO V0=CCV5,V5.5= -- -- 1 Au

timiLtnerruC

6Q/4Q/2QrofdlohserhTtimiLtnerruC8USA5357Pu -- 57.0 5.1 A

8USB5357Pu 5.0 0.1 A

5Q/3Q/1QrofdlohserhTtimiLtnerruC -- 8.1 6.3 A

egatloVtuptuO

egnaRegatloVtuptuO 5.4 -- 5.5 V

tratStfoS

emiTpUpmaRegatloVtuptuOC,V0=#3S TUO daoLoN,Fu01= -- 3.1 -- sm

C,V5=CCV5=#3S TUO ,Fu01=daoLoN -- 3.1 -- sm

tupnI#3S

hgiHtupnI V HI 4.1 -- -- V

woLtupnI V LI -- -- 4.0 V

emiTyaleDhgiHotwoL#3S T HL -- 01 -- sm

emiTyaleDwoLothgiH#3S T LH -- 03 -- su

tupnINE

hgiHtupnI V HI 4.1 -- -- V

woLtupnI V LI -- -- 4.0 V

emiTyaleDhgiHotwoLNE T HL -- 051 -- su

noitcetorPerutarepmeTrevO

leveLdlohserhTnwodtuhSlamrehT ngiseDyB -- 531 -- OC

siseretsyHnwodtuhSlamrehT ngiseDyB -- 03 -- OC

uP7535


VOUT1 (2V/Div)

EN (2V/Div)

VOUT1 (2V/Div)

EN (2V/Div)

VOUT1 (2V/Div)

5VSB (2V/Div)

S3# (2V/Div)

5VCC (2V/Div)

Typical Operation Characteristics

VOUT1 (2V/Div)

5VSB (2V/Div)VOUT1 (2V/Div)

5VSB (2V/Div)

5VCC (2V/Div)

VOUT1 (2V/Div)

5VSB (2V/Div)

S3# (2V/Div)

5VCC (2V/Div)

Power On by 5VSB

Time (4ms/Div)COUT1 = 10uF, S3# = 0V

Power On by 5VCC

Time (4ms/Div)COUT = 10uF, 5VSB = S3# = 5V, 5VCC = 4.5V

S3# from High to Low

Time (100us/Div)5VSB = 4.5V, 5VCC = 5.5V, COUT1 = 10uF

S3# from Low to High

Time (2ms/Div)5VSB = 4.5V, 5VCC = 5.5V, COUT1 = 10uF

Turn On with S3# = Low

Time (400us/Div)5VSB = 5V, COUT1 = 10uF, IOUT1 = 100mA

Turn On with S3# = High

Time (400us/Div)5VSB = 5VCC = 5V, COUT1 = 10uF, IOUT1 = 100mA

uP7535


100

120

140

160

180

200

220

240

-50 0 50 100 150200250300350400450500550600650700

-50 0 50 100 150


POR Threshold Level vs. Temperature

Junction Temperature (OC)

PO

R T

hres

hold

Lev

el (V

)

Control Input Level vs. Temperature


Con

trol I

nput

Thr

esho

ld L

evel

(V)

Q2/Q4/Q6 On Resistance vs. Temperature


Q2/

Q4/

Q6

On

Res

ista

nce

(mΩ

)

Q1/Q3/Q5 On Resistance vs. Temperature


Q1/

Q3/

Q5

On

Res

ista

nce

(mΩ

)

4

4.05

4.1

4.15

4.2

4.25

4.3

4.35

4.4

-50 0 50 100 150

5VSB/5VCCFalling

5VSB/5VCCRising

0.20.30.40.50.60.70.80.91

1.11.2

-50 0 50 100 150

EN/S3#Falling

EN/S3#Rising

VOUT1 (2V/Div)

IOUT1 (500mA/Div)

VOUT1 (2V/Div)

IOUT1 (1A/Div)

OCP for 5VSB OCP for 5VCC

Time (1ms/Div)COUT = 10uF, S3# = 0V

Time (1ms/Div)COUT = 10uF, S3# = 5V

uP7535


0

40

80

120

160

200

-50 0 50 100 150

Quiescent Current vs. Temperature

Junction Temperature (OC)S3# = 5VCC = 0V.

Qui

esce

nt C

urre

nt (

uA)


uP7535


Application InformationThe uP7535 is a current limited, dual-input triple-outputpower multiplexer acting as a high side switch for USBapplications where heavy capacitive loads and short-circuitsare likely to be encountered. It switches output voltages to5VSB at S3/S4/S5 states with 600mΩ switch and 200mAcapacity; to 5VCC at S0/S1/S2 states with 180mΩ switchand 1.5A capacity. The outputs can be parallel to providetotally 3.0A output current at S0/S1/S2 states.


When the output load exceeds the current-limit thresholdor a short is present, the uP7535 asserts overcurrentprotection and limits the output current to a safe level bydriving the power switches into saturation mode.


Input and output capacitorsBypass the supply input pins with a single 4.7uF capacitoras close as possible to the uP7535. A 4.7uF output capacitorat the output pin is recommended even much larger outputcapacitors are already available at the output of the uP7535,especially if the output capacitors are more than 2 inchesaway on the PCB. The inrush current to charge the outputcapacitors is calculated as:

SS

OUTOUTIN T

VCI ×= (A)

Special care should be paid to large output capacitorapplications. Take COUT = 1000uF as example, the inrushcurrent is IIN = 1000uF x 5V / 1.3ms = 3.8A. This is higherthan the current limit threshold of Q1/Q3/Q5 and Q2/Q4/Q6. In this case, the output voltage ramp up time iscontrolled by the current limit function of Q1/Q3/Q5 andQ2/Q4/Q6 as shown in Figure 1. Note that output voltageramping up slew rates are different due to different outuptcapacitors.

Time: 4ms/Div

VOUT1 (2V/Div)

IOUT2 (1AV/Div)

5VSB (2V/Div)

VOUT2 (2V/Div)

Figure 1. Turn on into 5VSB COUT2 = 1500uF, COUT1 = 10uF.

The output voltage undergoes an abrupt drop when a devicewith large input capacitors is hot plugged into the output ofuP7535 as shown in Figure 2, where a device with 1500uFis hot plugged into uP7535 output with 470uF outputcapacitor. The output voltage ramp up time is controlled bythe current limit level.

Time: 4ms/Div

VOUT1 (2V/Div)

IOUT2 (1AV/Div)

VOUT2 (2V/Div)

Figure 2. Hot plug application with S3# = 0V.

Thermal ConsiderationTemperature effect should be well considered when dealingwith voltage drop and power dissipation. The maximumRDS(ON) of the power switch is 160mΩ of Q2 under 25OCjunction temperature. If the device is expected to operateat 125OC junction temperature, the RDS(ON) of Q2 will become

160mΩ * (1 + (125OC - 25OC) * 0.5%/OC) = 240mΩ

uP7535


Application Informationwhere 0.5%/OC is the approximated temperature coefficientof the RDS(ON).

If the maximum load current is expected to be 1.2A, themaximum voltage will become

1.2A * 240mΩ = 288mV

This in turn will cause power dissipation as

1.2A * 288mV = 346mW

The temperature raise is calculated as

346mW * 50OC/W = 17OC

The junction temperature is calculated as TA + 17OC, whereTA is the expected maximum ambient temperature. A fewiterations are required until get final solutions.

The thermal resistance θJA highly depends on the PCBdesign. Copper plane under the exposed pad is an effectiveheatsink and is useful for improving thermal conductivity.Figure 3 show the relationship between thermal resistanceθJA vs. copper area on a standard JEDEC 51-7 (4 layers,2S2P) thermal test board at TA = 25OC. A 50mm2 copperplane reduces θJA from 75OC/W to 50OC/W and increasesmaximum power dissipation from 1.33W to 2W.

60 7050403020100

60

70

50

40

30

90

100

80

The

rmal

Res

ista

nce θ JA

(OC

/W)

Copper Area (mm2)

Figure 3. Thermal Resistance èJA vs. Copper Area

PCB Layout ConsiderationPlace the uP7535 as close to the USB connector aspossible to minimize the parasitic elements.

Place local bypass capacitors as closed as possible to

the 5VSB and 5VCC pins. Use short and wide tracesto minimize parasitic resistance and inductance.

The exposed pad should be soldered on GND planewith maximum area and with multiple vias to inner layerof ground place for improved thermal performance.

Keep the power trace short and wide to minimize theparasitic resistance along the trace.

uP7535


Note1.Package Outline Unit Description:

BSC: Basic. Represents theoretical exact dimension or dimension targetMIN: Minimum dimension specified.MAX: Maximum dimension specified.REF: Reference. Represents dimension for reference use only. This value is not a device specification.TYP. Typical. Provided as a general value. This value is not a device specification.

2.Dimensions in Millimeters.3.Drawing not to scale.4.These dimensions no not include mold flash or protrusions. Mold flash or protrusions shell not exceed 0.15mm.

Package Information

0.32 - 0.52

4.80 - 5.00

5.80 - 6.20

3.81 BSC

0.05 - 0.250.18 - 0.25

0.40 - 0.90

0.20 BSC

7.00 REF

1.50 REF

0 .70 REF 1.27 REF

1.27 BSC3.80 - 4.00

5.50 REF

4.00 REF

Recommended Solder Pad Layout

1.75 MAX

1.45 - 1.60

2.20 BSC

3.00 BSC

2.20 REF

3.00 REF

dual-input triple-output power multiplexer in psop-8l for ...plarameter ssymbo tnest condition mpi...

Documents