CS2001资料

CS2001

1.2 A Switching Regulator,and 5.0 V, 100 mA LinearRegulator with RESETThe CS2001 is a smart power supply ASIC utilized in automotiveairbag systems. It contains a current–mode switching regulator with a1.2 A on–chip switch and a 5.0 V, 100 mA linear regulator. The linearoutput capacitor must be 3.3 µF or greater with an ESR in the range of100 mΩ to 1.0 Ω. If the ESR of the cap is less than 100 mΩ, a seriesresistor must be used. The switcher can be configured in either a boostor flyback topology. The boost topology produces energy reservevoltage VER which is externally adjustable (25 V maximum) throughthe resistor divider connected to the VFB pin. In the event of faultconditions that produce VFB either open or shorted, the switcher isshut down.

Under normal operating conditions (VBAT > 8.0 V), the currentloading on the linear regulator is directed through VBAT. A low batteryor loss of battery condition switches the supply for the linear regulatorfrom VBAT to VER and shuts down the switcher using the ASIC’sinternal “smartswitch.” This switchover feature minimizes the powerdissipation in both the linear and switcher output devices and saves thecost of using a larger inductor.

The NERD (No Energy Reserve Detected) pin is a dual functionoutput. If VOUT is not in regulation, it provides a Power On Resetfunction whose time interval is externally adjustable with thecapacitor. This interval can be seen on the RESETB pin, which allowsfor clean power–up and power–down of the microprocessor. OnceVOUT is in regulation, the logic level of the NERD output (usuallylow) indicates to the microprocessor whether or not the VER pin isconnected.

A switched–capacitor voltage tripler accepts input voltage VER andproduces output voltage VCHG (typically VER + 8.0 V). This voltageis used in the system to drive high–side FETs.

This part is capable of withstanding a 50 V peak transient voltage.The linear regulator will not shut down during this event.Features

•Linear Regulator 5.0 V ±2% @ 100 mA

•Switching Regulator 1.2 A Peak Internal Switch•Voltage Tripler•Smart Functions–Smartswitch–RESET

–Energy Reserve Status•Protection

–Overtemperature–Current Limit

–50 V Peak Transient Capability

•Internally Fused Leads in SO–20L Package

© Semiconductor Components Industries, LLC, 2001

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201SO–20LDWF SUFFIXCASE 751D

MARKING DIAGRAM

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CS2001AWLYYWW1AWL, LYY, YWW, W

= Assembly Location= Wafer Lot= Year

= Work Week

PIN CONNECTIONS

VERVBATVFBGND1GND2GND3GND4VSWSWSDCOMP

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20

VOUTRESETBNERDGND8GND7GND6GND5VCHGIBIASCPUMP

ORDERING INFORMATION

DeviceCS2001YDWF20CS2001YDWFR20

PackageSO–20LSO–20L

Shipping37 Units/Rail1000 Tape & Reel

1

December, 2000 – Rev. 5

Publication Order Number:

CS2001/D

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CS2001

100 µF68 µHMicroprocessorVERVBATVFBGND11.0 k95.3 kVOUTRESETBNERDGND8ESRGND7GND2CS2001GND6GND3GND4GND5VCHGIBIASCPUMP30.1 k270 pF1.0 µF0.1 µF1.0 µF0.47 µFReserveFiringVoltage11 kVIGN1000 µF5.1 k1000 µFVSWSWSDCOMPTriplerFiringVoltage10 µF

Figure 1. Application Diagram

ABSOLUTE MAXIMUM RATINGS*

RatingVBATVERVOUTDigital Input/Output VoltagePeak Transient Voltage (36 V Load Dump @ 14 V Battery Voltage)Storage Temperature RangeJunction to Free Air Thermal ImpedanceESD Susceptibility (Human Body Model)Lead Temperature Soldering: TATJ1.60 second maximum above 183°C.*The maximum package power dissipation must be observed.

Reflow: (SMD styles only) (Note 1.)Value–0.5 to 25–0.5 to 25–0.5 to 7.0–0.5 to 7.050–55 to 150554.0230 peak–40 to 85–40 to 150UnitVVVVV°C°C/WkV°C°C°Chttp://onsemi.com

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CS2001

ELECTRICAL CHARACTERISTICS (8.0 V ≤ VBAT ≤ 16 V, 8.0 V ≤ VER ≤ 25 V, 1.0 mA ≤ IV(OUT) ≤ 100 mA,

TTEST = –40°C to 125°C; unless otherwise specified.)

CharacteristicLinear RegulatorOutput VoltageRegulator Bias Current (from VBAT)Output Driven from VBAT, VER = 25 VOutput Driven from VER, VBAT = 0 VIV(BAT) @ IV(OUT) = –100 mA, SWSD = 4.0 V, VBAT = 16 V, VER = 25 VT = –40°CT = 25°CT = 125°CIVER @ IV(OUT) = –100 mA, SWSD = 4.0 V, VBAT = 0 V, VER = 25 VT = –40°CT = 25°CT = 125°CVER = 25 V, IV(OUT) = –100 mA (Probe Only)VBAT = 0 V, IV(OUT) = –100 mAVER = 25 V, IV(OUT) = –50 mAVER = 25 V, IV(OUT) = –50 mAVBAT = 16 V, VER = 25 V, IV(OUT) = – 1.0 mA,C = 10 µF, ESR = 0.5 Ω–––VER = 25V, IV(OUT) = –1.0 mACPUMP 270 pF, RI(BIAS) = 30.1 kΩ∆IV(BAT) for 0 A ≤ IV(SW) ≤ 1.2 AIV(SW) = 1.2 A––VFB Above Short Low Detection Level–––IV(SW) @ VSW = 50 V, SWSD = VOUTVBAT = 16 V, IV(OUT) = –1.0 mA, CCHG = 1.5 mFVER = 8.0 V, IV(CHG) = –30 µAVER = 12 V, IV(CHG) = –90 µACCHG = 0.15 µF, VER = 8.0 V,VCHG = 14.25 V–VER = 28 V, IV(CHG) = 0 µA–6.256.25–2525–8.08.0–32.532.5–13133040403.0VVmsVVmA135––1.21.238–20020080–150–––1.27–250250––165501.62.41.3031.030030095100kHzmAVAVµAmVmV%µA4.94.9––5.15.1VVTest ConditionsMinTypMaxUnit––––––8.07.06.0mAmAmARegulator Bias Current (from VER)–––––6.50.5–––120–––––––––––119.08.01.51.58.01.00.050.0250.025–mAmAmAVVVVVVVmADropout Voltage VBAT – VOUTDropout Voltage VER – VOUTSmart Switch Threshold VBAT to VERSmart Switch Threshold HysteresisVOUT Output NoiseLine RegulationLoad RegulationOutput Current LimitSwitching RegulatorSwitching FrequencyPump Drive CurrentSwitch Saturation VoltageOutput Current LimitVFB RegulationVFB Input CurrentVFB Input Shorted Low DetectionLevelCPUMP Short Detection ThresholdMaximum Duty CycleVSW Leakage CurrentVoltage TriplerOutput Voltage ClampVCHG – VERInitial Charge TimeMaximum Output Voltage ClampVCHGOutput Voltage Clamp VCHGShort Circuit Path Current Limit VERto VCHGhttp://onsemi.com

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CS2001

ELECTRICAL CHARACTERISTICS (continued) (8.0 V ≤ VBAT ≤ 16 V, 8.0 V ≤ VER ≤ 25 V, 1.0 mA ≤ IV(OUT) ≤ 100 mA,

TTEST = –40°C to 125°C; unless otherwise specified.)

CharacteristicRESETB OUTPUTHigh ThresholdLow ThresholdHysteresisOutput Low VoltagePull–Up ResistorSWSD InputHigh ThresholdLow ThresholdInput ImpedanceNERD OUTPUTVER Detection VoltageOutput Low VoltagePull–Up CurrentPower On DelayClamping Voltage (Low)Clamping Voltage (High)General

VER Load CurrentVER = 25 V, VBAT = 16 V, IV(OUT) = –100 mAT = –40°CT = 25°CT = 125°C(Guaranteed by Design)–––160––––5.05.04.0210mAmAmA°CVER PresentVER Not PresentVBAT = 0 VVOUT IncreasingVOUT Decreasing–VOUT = 1.0 V, IRESETB = 100 µAIRESETB = 1.0 mA, VOUT = 4.5 VRESETB = 1.0 VVBAT = 16 V, VER = 25 V, IV(OUT) = –1.0 mA

––Referenced to GroundVBAT = 16 V, IV(OUT) = –1.0 mA, CNERD = 0.47 mF

–INERD = 1.0 mA, VOUT = 4.5 VNERD = 0.5 V–1.5–306.251.03.5––408.51.253.756.50.550111.54.0VVµAmsVV–0.3 × VOUT10––200.7 × VOUT–40VVkΩ4.5254.525––254.754.65100––504.854.8252000.50.5100VVmVVVkΩTest ConditionsMinTypMaxUnitThermal ShutdownPACKAGE PIN DESCRIPTION

PACKAGE PIN #SO–20L1234567101112PIN SYMBOLVERVBATVFBGND1GND2GND3GND4VSWSWSDCOMPCPUMPIBIASEnergy reserve input.Battery input.Charge PUMP control voltage input.Ground.Ground.Ground.Ground.Charge PUMP switch collector.Charge PUMP shutdown input.Charge PUMP compensation pin.Charge PUMP timing cap input.Reference current resistor pin.FUNCTIONhttp://onsemi.com

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CS2001

PACKAGE PIN DESCRIPTION (continued)PACKAGE PIN #SO–20L1314151617181920PIN SYMBOLVCHGGND5GND6GND7GND8NERDRESETBVOUTFUNCTIONSwitched cap voltage tripler output.Ground.Ground.Ground.Ground.No energy reserve detected output.Reset output.Linear regulator output.VERVFBVREFV/CFBPUMPShort0.25 V–Detect+VCCSwitcher–Error Amp+VCC+–PreregulatorVoltageTriplerVCHG

SwitcherVCompREFLogicBaseDrive1.2 AVSW

COMPVREFIBIASCPUMPVCCOscillatorVREFBandgap1.25 VReferenceVBATVREFOverTemperatureCurrentVCCSense Amp+–SwitcherVCCShutdownComp–0.5 × VCC+GND

SWSD

VREFLowBattery–Detect+7.25 VLinearVREFError Amp+–VREFLogicNo BatteryDrive100 mACurrentLimitVERDetectVCCVOUT

NERDVCCRESETBResetFigure 2. Block Diagramhttp://onsemi.com

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CS2001

CIRCUIT DESCRIPTION

Figure 3 is an oscilloscope waveform showing thecharge pump collector voltage, collector current and thecharge pump timing capacitor during normal operationwith IVER = 30mA.

Figure 4 is an oscilloscope waveform showing the voltagetripler output and the energy reserve input during power up.

Figure 4. Startup with RV(CHG) = 510 k

Figure 3. Typical Operation with IVER = 30 mA

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CS2001

PACKAGE DIMENSIONS

SO–20LDWF SUFFIXCASE 751D–05

ISSUE F

DA11X 45_qNOTES:1.DIMENSIONS ARE IN MILLIMETERS.2.INTERPRET DIMENSIONS AND TOLERANCESPER ASME Y14.5M, 1994.3.DIMENSIONS D AND E DO NOT INCLUDE MOLDPROTRUSION.4.MAXIMUM MOLD PROTRUSION 0.15 PER SIDE.5.DIMENSION B DOES NOT INCLUDE DAMBARPROTRUSION. ALLOWABLE PROTRUSION SHALLBE 0.13 TOTAL IN EXCESS OF B DIMENSION ATMAXIMUM MATERIAL CONDITION.DIMAA1BCDEeHhLqMILLIMETERSMINMAX2.352.650.100.250.350.490.230.3212.6512.957.407.601.27 BSC10.0510.550.250.750.500.900 7 __HMBM2010X0.25E11020XB0.25MBTASBSAeSEATINGPLANEh18XA1TCPACKAGE THERMAL DATA

ParameterRΘJCRΘJATypicalTypicalSO–20L955Unit°C/W°C/Whttp://onsemi.com

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CS2001

ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changeswithout further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particularpurpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability,including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/orspecifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must bevalidated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others.SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applicationsintended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury ordeath may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and holdSCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonableattorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claimalleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer.

PUBLICATION ORDERING INFORMATION

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ON Semiconductor Website: http://onsemi.comFor additional information, please contact your localSales Representative.http://onsemi.com8CS2001/D