DC DC模块tpic74100-q1.pdf

《DC DC模块tpic74100-q1.pdf》由会员分享，可在线阅读，更多相关《DC DC模块tpic74100-q1.pdf（29页珍藏版）》请在得力文库 - 分享文档赚钱的网站上搜索。

1、FEATURESAPPLICATIONSP0021-02PWP HTSSOP PACKAGE(TOP VIEW)SCR1Cboot2Cboot1VL1PGNDL2V5AdriverOUTVgINSCR05Vg_ENABLEENABLEVGNDRRESTARESETCLPlogicmodOUT2019181716151413121112345678910DESCRIPTIONTPIC74100-Q1BUCK/BOOST SWITCH-MODE REGULATORSLIS125DECEMBER 2006Switched 5-V Regulated Output on 5Vg WithCurrent

2、 LimitSwitch-Mode RegulatorProgrammable Slew Rate and Frequency5 V 2%,Normal ModeModulation for EMI Consideration5 V 3%,Low-Power or Crossover ModeReset Function With Deglitch Timer andSwitching Frequency,440 kHz(typical)Programmable DelayInput Operating Range,1.5 V to 40 V,(Vdriver)Alarm Function f

3、or Undervoltage Detection1-A Load-Current Capabilityand Indication200-mA Load-Current Capability Down toThermally Enhanced Package for Efficient2-V Input(Vdriver)Heat Management120-mA Load-Current Capability Down to1.5-V Input(Vdriver)Enable FunctionAutomotive Electronic Controller PowerSupplyLow-Po

4、wer Operation ModeThe TPIC74100-Q1 is a switch-mode regulator with integrated switches for voltage-mode control.With the aid ofexternal components(LC combination),the device regulates the output to 5 V 3%for a wide input-voltagerange.The TPIC74100-Q1 offers a reset function to detect and indicate wh

5、en the 5-V output rail is outside of thespecified tolerance.This reset delay is programmable using an external timing capacitor on the REST terminal.Additionally,an alarm(AOUT)feature is activated when the input supply rail Vdriveris below a prescaled specifiedvalue(set by the AINterminal).The TPIC7

6、4100-Q1 has a frequency-modulation scheme to minimize EMI.The clock modulator permits amodulation of the switching frequency to reduce interference energy in the frequency band.The 5Vg output is a switched 5-V regulated output with internal current limiting to prevent RESET from beingasserted when p

7、owering a capacitive load on the supply line.This function is controlled by the 5Vg_ENABLEterminal.If there is a short to ground on this output(5Vg output),the output self-protects by operating in achopping mode.This does,however,increase the output ripple voltage on VOUTduring this fault condition.

8、Ordering InformationPart NumberPackageTPIC74100QPWPRQ1R-PDSO-G(PWP,20-pin)Please be aware that an important notice concerning availability,standard warranty,and use in critical applications of TexasInstruments semiconductor products and disclaimers thereto appears at the end of this data sheet.Power

9、PAD is a trademark of Texas Instruments.All other trademarks are the property of their respective owners.PRODUCTION DATA information is current as of publication date.Copyright 2006,Texas Instruments IncorporatedProducts conform to specifications per the terms of the TexasInstruments standard warran

10、ty.Production processing does notnecessarily include testing of all B0130-01Switch-ModeController?WithDead TimeChargePumpVrefBandgapRefVregOsc+-+-POR?WithDelay TimerVdriverENABLEGNDL15?V?Supply5Vg_Supply-+L2VOUTQ1Q2Q3Q4RESETTempMonitorShutdownRegulatorRmodClockModulatorCboot1Cboot25Vg_ENABLEAOUTREST

11、PGNDSCR0SCR1Slew?RateControl5VgLow-PowerModeControlCLPInrushCurrent?Limit4.7?nF22H100Hmm4.7?nF5?kW12?kWR1R2LC470?nF2.2?nF150?nFChargePumpBandgapRefVlogicAINVbattery22?F470?F1?F100?FExternal?SchottkyDiode?Required,Max.?0.4?V?1 A?125CLow-Power?ModeDigital?Signal5?kWTPIC74100-Q1BUCK/BOOST SWITCH-MODE R

12、EGULATORSLIS125DECEMBER 2006NOTE:All component values are typical.2Submit Documentation FTPIC74100-Q1BUCK/BOOST SWITCH-MODE REGULATORSLIS125DECEMBER 2006Table 1.Terminal FunctionsTERMINALDESCRIPTIONNAMENO.I/OSCR11IProgrammable slew-rate controlCboot22IExternal bootstrap capacitorCboot13IExternal boo

13、tstrap capacitorVdriver4IInput voltage sourceL15IInductor input(an external Schottky diode(1)to GND must be connected to L1)PGND6IPower groundL27IInductor outputVOUT8O5-V regulated output5Vg9OSwitched 5-V supplyAIN10IProgrammable alarm settingCLP11I/OLow-power operation mode(digital input)RESET12ORe

14、set function(open drain)AOUT13OAlarm output(open drain)REST14OProgrammable reset timer delayRmod15IMain switching frequency modulation setting to minimize EMIGND16IGroundVlogic17OSupply decoupling output(may be used as a 5-V supply for logic-level inputs)ENABLE18ISwitch-mode regulator enable/disable

15、5Vg_ENABLE19ISwitched 5-V voltage regulator output enable/disableSCR020IProgrammable slew-rate controlExposed thermal pad of the package should be connected to GND or left floating.(1)Maximum 0.4 V 1 A 125C3Submit Documentation FABSOLUTE MAXIMUM RATINGSDISSIPATION RATING TABLERECOMMENDED OPERATING C

16、ONDITIONSTPIC74100-Q1BUCK/BOOST SWITCH-MODE REGULATORSLIS125DECEMBER 2006over recommended operating free-air temperature range(unless otherwise noted)(1)Unregulated input voltage,V(driver)(2)0.5 V to 40 VUnregulated inputs,V(AIN),V(ENABLE)(2)0.5 V to 40 VBootstrap voltagesV(Cboot1)52 VV(Cboot2)14 VS

17、witch mode voltagesV(L1)1 V to 40 VV(L2)1 V to 7 VLogic input voltages,V(Rmod),V(SCR0),V(SCR1),V(CLP),and V(5Vg_ENABLE)(2)0.5 V to 7 VLow output voltages,V(RESET),V(AOUT),V(logic),and V(REST)(2)0.5 V to 7 VElectrostatic-dischargeV(HBMESD)(3),pin 7(L2),pin 8(VOUT),pin 9(5Vg)800 VsusceptibilityV(HBMES

18、D)(3),pins 16 and 10202 kVThermal impedance,junction-to-case,RJC(4)2C/WThermal impedance,RJA(4)32C/Wjunction-to-ambientRJA(5)40C/WContinuous power dissipation,PDSee DissipationRating TableOperating virtual junction temperature range,TJ40C to 150COperating ambient temperature range,TA40C to 125CStora

19、ge temperature range,Tstg65C to 125CLead temperature(soldering,10 s),T(LEAD)260C(1)Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device.These are stress ratingsonly,and functional operation of the device at these or any other conditions beyond those in

20、dicated under recommended operatingconditions is not implied.Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.(2)All voltage values are with respect to ground.(3)The human body model is a 100-pF capacitor discharged through a 1.5-k resistor into each t

21、erminal.(4)The thermal data is based on using 2-oz.copper trace with at least four square inches of copper footprint for heat dissipation.Thecopper pad is soldered to the thermal land pattern.Correct attachment procedure must be incorporated.(5)The thermal data is based on using 1-oz.copper trace wi

22、th at least four square inches of copper footprint for heat dissipation.Thecopper pad is soldered to the thermal land pattern.Correct attachment procedure must be incorporated.RJATA 25C Power RatingDerating Factor Above TA=25CTA=85C Power RatingTA=125C Power Rating32C/W3.9 W31.25 mW/C2.03 W0.781 W40

23、C/W3.125 W25 mW/C1.625 W0.625 WMINMAXUNITUnregulated input voltage,V(driver)624VUnregulated input voltages,V(AIN)and V(ENABLE)024VV(L1)117Switch-mode terminalsVV(L2)55.5V(Cboot1)V(driver)+10Bootstrap voltagesVV(Cboot2)8Logic levels(I/O),V(Rmod),V(logic),V(SCR0),V(SCR1),V(5Vg_ENABLE),V(RESET),V(AOUT)

24、,V(CLP),and05.25VV(REST)Operating ambient temperature range,TA40125CLogic levels(I/O),V(SCR0),V(SCR1),V(CLP)directly connected to V(logic)V(logic)V(logic)V4Submit Documentation FELECTRICAL CHARACTERISTICSTPIC74100-Q1BUCK/BOOST SWITCH-MODE REGULATORSLIS125DECEMBER 2006V(driver)=6 V to 17 V,TA=-40C to

25、 125C,unless otherwise notedParametersTEST CONDITIONSMinTypMaxUnitV(driver)Unregulated input voltage1.540VV(driver)Start-up condition voltageIO=600 mA5VCO=36 F(min)to 220 F(max)420SOMSoft-start rampV/msCO=220 F(min)to 470 F(max),see220Note(1)I(standby)Standby currentENABLE=low1020AIqQuiescent curren

26、tCLP=0 V,V(driver)=11 V,IO=0 mA100160AVOOutput voltageDC5VNormal mode2%VOOutput-voltage toleranceBoost/buck crossover or low-power3%modeIOOutput currentV(driver)7 V1AV(driver)=2 V,see Note(2)200IO(Boost)Output current,boost modemAV(driver)=1.5 V,see Note(2)120Internal peak current limit(normalIPPn(1

27、)1.752.5Amode)Internal peak current limit(low-powerIPPl(1)0.751.25mode)IPPeak currentV(driver)=16 V,IO=1 A,and L=33 H1.5ABoost/buck crossover voltageV(driver)See Note(3)55.9VwindowTotThermal shutdown(4)160180200C5Vg Output and ENABLErDS(on)On-state resistance135225mIOOutput current400mAVI5Vg_ENABLE

28、input-voltage range0.5VOVVIH5Vg_ENABLE threshold high voltageV(5Vg)=5 V2.533.5VVIL5Vg_ENABLE threshold low voltageV(5Vg)=0 V1.522.5VV(hys)Hysteresis voltage0.51Vr(pd)Internal pulldown resistor300500850kENABLEVIENABLE input-voltage range0.540V8 V V(driver)17 V2.533.5VIHENABLE threshold high voltageV6

29、 V V(driver)8 V1.933.5VILENABLE threshold low voltageVO=5 V1.522.5V8 V V(driver)17 V0.51V(hys)Hysteresis voltageV6 V V(driver)8 V0.1(1)Ensured by characterization.(2)Tested with inductor having following characteristics:L=33 H,Rmax=0.1,IR=1.8 A.Output current must be verified in applicationwhen indu

30、ctor Rmax(ESR)is increased.(3)Ensured by characterization.For further details,see the Buck/Boost Transitioning section.(4)Ensured by characterization;hysteresis 15C(typical)5Submit Documentation FTPIC74100-Q1BUCK/BOOST SWITCH-MODE REGULATORSLIS125DECEMBER 2006ELECTRICAL CHARACTERISTICS(continued)V(d

31、river)=6 V to 17 V,TA=-40C to 125C,unless otherwise notedParametersTEST CONDITIONSMinTypMaxUnitRESETV(th)RESET threshold voltage4.514.654.79VV(RESET)RESET tolerance3%C(REST)=10 nF81012t(RESET)RESET timemsC(REST)=100 nF,see Note(5)80100120Isink=5 mA450VOLRESET output low voltagemVIsink=1 mA84t(deglit

32、ch)RESET deglitch timeSee Note(5)81012.5sAlarmVIAlarm input-voltage range0.540VVILAlarm threshold low voltage2.22.32.35VVIHAlarm threshold high voltage2.432.52.58VV(hys)Hysteresis voltage200mVIsink=5 mA450VOLAlarm output low voltagemVIsink=1 mA84Low-Power Mode(Pulse Mode)PFMIO(LPM)Load current in lo

33、w-power modeV(driver)50 mA),the buck/boost transitioning can cause a reset signal at theRESET pin.In buck mode,the duty cycle of transistor Q1 sets the voltage VOUT.The duty cycle of transistor Q1 varies 10%to 99%depending on the input voltage,V(driver).If the peak inductor current(measured by Q1)ex

34、ceeds 450 mA(typical),Q2 is turned on for this cycle(synchronized rectification).Otherwise,the current recirculates throughQ2 as a free-wheeling diode.The detection for synchronous or asynchronous mode is done cycle-by-cycle.To avoid a cross-conduction current between Q1 and Q2,an inherent delay is

35、incorporated when switching Q1off and Q2 on and vice versa.In buck mode,transistor Q3 is not required and is switched off.Transistor Q4 is switched on to reduce powerdissipation.The switch timings for transistors Q3 and Q4 are not considered.In buck mode,the logical control of thetransistors does no

36、t change.Figure 2.Buck/Boost Switch Mode ConfigurationIn boost mode,the duty cycle of transistor Q3 controls the output voltage VOUT.The duty cycle is internallyadjusted 5%to 85%depending on the internally sensed voltage of the output.Synchronized rectification occurswhen V(driver)is below 5 V.To av

37、oid a discharging of the buffer capacitor,a simultaneous switching on of Q3 and Q4 is not allowed.Aninherent delay is incorporated between Q3 switching off and Q4 switching on and vice versa.In boost mode,transistor Q2 is not required and remains off.Transistor Q1 is switched on for the duration of

38、theboost-mode operation(serves as a supply line).11Submit Documentation FExtension of the Input Voltage Range on V(driver)Low-Power ModeTemperature and Short-Circuit ProtectionSwitch Output Terminal(5Vg)Current LimitationSoft StartTPIC74100-Q1BUCK/BOOST SWITCH-MODE REGULATORSLIS125DECEMBER 2006The s

39、witch timings of transistors Q1 and Q2 are not considered.In boost mode,the logical control of thetransistors does not change.To ensure a stable 5-V output voltage with the output load in the specified range,the V(driver)supply must begreater than or equal to 5 V for greater than 1 ms(typical).After

40、 a period of 1 ms(typical),the logic may besupplied by the VOUTregulator and the V(driver)supply may be capable of operating down to 1.5 V.The switch-mode regulator does not start at V(driver)less than 5 V.To reduce quiescent current and to provide efficient operation,the regulator enters a pulsed m

41、ode.The device enters this mode by a logic-level low on this terminal.Automatic low-power mode is not available.The low-power-mode function is not available in boost mode.Thedevice leaves low-power mode during boost mode regardless of the logic level on the CLP terminal.To prevent thermal destructio

42、n,the device offers overtemperature protection to disable the IC.Also,short-circuitprotection is included for added protection on VOUTand 5Vg.A charge pump drives the internal FET,which switches the primary output voltage VOUTto the 5Vg pin.Protection is implemented to prevent the output voltage fro

43、m dropping below its specified value while enablingthe secondary output voltage.An explanation of the block diagram(see Figure 1)is given by the followingexample:Device is enabled,output voltage VOUTis up and stable.5Vg is enabled(pin 5Vg_ENABLE set to high)with load resistance connected to 5Vg pin.

44、If output voltage VOUTdrops below typical(VOUT 100 mV),the charge pump of the 5Vg FET is switched offand the FET remains on for a while as the gate voltage drops slowly.If VOUTdrops below the RESET threshold of 4.65 V(typical),the FET of the secondary output voltage 5Vg isswitched off(gate drawn to

45、ground level).A deglitch time ensures that a device reset does not occur if VOUTdrops to the reset level during the 5Vgturnon phase.If VOUTrises above typical(VOUT 100 mV),the charge pump of the 5Vg FET is switched on and drives thegate of the 5Vg FET on.On power up,the device offers a soft-start fe

46、ature which ramps the output of the regulator at a slew of 10 V/ms.When a reset occurs,the soft start is reenabled.Additionally,if the output capacitor is greater than 220 F(typical),the slew rate decreases to a value set by the internal current limit.In boost mode,the soft-start featureis not activ

47、e.12Submit Documentation FTYPICAL CHARACTERISTICSIO Output Current mA0123456012345678910II Input Current mAG001TA=25MaximumTA=125V(driver)=11 VIO Output Current mA0.00.10.20.30.40.50.60.70.80.91.00.00.10.20.30.40.50.60.70.80.91.0II Input Current mAG002TA=125TA=25MaximumV(driver)=11 VTPIC74100-Q1BUCK

48、/BOOST SWITCH-MODE REGULATORSLIS125DECEMBER 2006NOTE:Maximum characteristic specified by design.Figure 3.Low-Power Mode Current,IO=0 mA10 mANOTE:Maximum characteristic specified by design.Figure 4.Low-Power-Mode Current,IO=0 mA1 mA13Submit Documentation FVI Input Voltage V010020030040050060070080090

49、0100011001.52.02.53.03.54.04.55.05.56.06.57.07.58.08.59.09.510.0IO Output Current mAG003TA=25TA=125IO Output Current mA5055606570758085100150200250300350400450500550600Efficiency%G004SCR:11,V(driver)=11 VSCR:10,V(driver)=11 VSCR:01,V(driver)=11 VSCR:00,V(driver)=11 VSCR:11,V(driver)=17 VSCR:10,V(dri

50、ver)=17 VSCR:01,V(driver)=17 VSCR:00,V(driver)=17 VTPIC74100-Q1BUCK/BOOST SWITCH-MODE REGULATORSLIS125DECEMBER 2006TYPICAL CHARACTERISTICS(continued)NOTES:(1)Typical representation of input voltage vs output load current at TA=25C and 125C,after the correct power-up sequence isinvoked.(2)The dip in