LT8390 (Rev. C) - Analog Devices

1 LT83901 Rev. CFor more information FeedbackTYPICAL APPLICATION FEATURESDESCRIPTION60V Synchronous 4-Switch Buck-Boost Controllerwith Spread SpectrumThe LT 8390 is a synchronous 4-switch buck-boost DC/DC controller that regulates output voltage, input or output current from an input voltage above, below, or equal to the output voltage. The proprietary peak-buck/peak-boost current mode control scheme allows adjustable and syn-chronizable 150khz to 650kHz fixed frequency operation, or internal 15% triangle spread spectrum frequency modulation for low EMI. With a 4V to 60V input voltage range, 0V to 60V output voltage capability, and seamless low noise transitions between operation regions, the LT8390 is ideal for voltage regulator, battery and supercapacitor charger applications in automotive, industrial, telecom, and even battery-powered LT8390 provides input or output current monitor and power good flag.

2 Fault protection is also provided to detect output short-circuit condition, during which the LT8390 retries, latches off, or keeps Efficient 48W (12V 4A) Miniature Buck-Boost Voltage RegulatorAPPLICATIONS n4-Switch Single Inductor Architecture Allows VIN Above, Below or Equal to VOUT nSynchronous Switching: Up to 98% Efficiency nProprietary Peak-Buck Peak-Boost Current Mode nWide VIN Range: 4V to 60V n Output Voltage Accuracy: 1V VOUT 60V n 3% Input or Output Current Accuracy with Monitor nSpread Spectrum Frequency Modulation for Low EMI nHigh Side PMOS Load Switch Driver nIntegrated Bootstrap Diodes nNo Top MOSFET Refresh Noise in Buck or Boost nAdjustable and Synchronizable.

3 150khz to 650kHz nVOUT Disconnected from VIN During Shutdown nAvailable in 28-Lead TSSOP with Exposed Pad and 28-Lead QFN (4mm 5mm) nAEC-Q100 Qualified for Automotive Applications nAutomotive, Industrial, Telecom Systems nHigh Power Battery-Powered SystemAll registered trademarks and trademarks are the property of their respective vs VINIOUT = 4 AINPUT VOLTAGE (V)010203040506086889092949698100 EFFICIENCY (%)8390 F4m F6uH22 10 F25V F1 F1 F100pF120 F16V120 F16 VEN/UVLOVREFCTRLPGOODBG2 BST2TG2 INTVCCLOADENFBVOUTISPISNSYNC/SPRDTESTVIN 4V TO 56V400kHz63V 2100V 2 ISMONPGOODVOUT12V4 ALSPLSNSW1SW2 BST1TG1BG1 VINLT8390 LOADTGISMONSSVCRTGNDSSFM OFFSSFM ONIOUT LIMIT TA01aLT83902 Rev.

4 CFor more information MAXIMUM RATINGSVIN, EN/UVLO, VOUT, ISP, ISN ..60V(ISP-ISN) .. 1V to 1 VBST1, BST2 ..66 VSW1, SW2, LSP, LSN .. 6V to 60 VINTVCC, (BST1-SW1), (BST2-SW2) ..6V(BST1-LSP), (BST1-LSN) ..6V(Note 1)ORDER INFORMATIONLEAD FREE FINISHTAPE AND REELPART MARKING*PACKAGE DESCRIPTIONTEMPERATURE RANGELT8390 EFE#PBFLT8390 EFE#TRPBFLT8390FE28-Lead Plastic TSSOP 40 C to 125 CLT8390 IFE#PBFLT8390 IFE#TRPBFLT8390FE28-Lead Plastic TSSOP 40 C to 125 CLT8390 JFE#PBFLT8390 JFE#TRPBFLT8390FE28-Lead Plastic TSSOP 40 C to 150 CLT8390 HFE#PBFLT8390 HFE#TRPBFLT8390FE28-Lead Plastic TSSOP 40 C to 150 CLT8390 EUFD#PBFLT8390 EUFD#TRPBF839028-Lead (4mm 5mm) Plastic QFN 40 C to 125 CLT8390 IUFD#PBFLT8390 IUFD#TRPBF839028-Lead (4mm 5mm) Plastic QFN 40 C to 125 CLT8390 JUFD#PBFLT8390 JUFD#TRPBF839028-Lead (4mm 5mm)

5 Plastic QFN 40 C to 150 CLT8390 HUFD#PBFLT8390 HUFD#TRPBF839028-Lead (4mm 5mm) Plastic QFN 40 C to 150 C1234567891011121314 TOP VIEWFE PACKAGE28-LEAD PLASTIC TSSOP JA = 30 C/W, JC = 5 C/WEXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB2827262524232221201918171615BG1 BST1SW1TG1 LSPLSNVININTVCCEN/UVLOTESTLOADENVREFCTRL ISPBG2 BST2SW2TG2 VOUTLOADTGSYNC/SPRDRTVCFBSSPGOODISMONISN 29 GND910 TOP VIEW29 GNDUFD PACKAGE28-LEAD (4mm 5mm) PLASTIC QFN JA = 43 C/W, JC = C/WEXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB11121328 27 26 25 241423654321TG1 LSPLSNVININTVCCEN/UVLOTESTLOADENTG2 VOUTLOADTGSYNC/SPRDRTVCFBSSSW1 BST1BG1BG2 BST2SW2 VREFCTRLISPISNISMONPGOOD7171819202122168 15 PIN CONFIGURATIONFB, LOADEN, SYNC/SPRD, CTRL, PGOOD.

6 6 VOperating Junction Temper atur e Range (Notes 2, 3) LT8390E .. 40 C to 125 C LT8390I .. 40 C to 125 C LT8390J, LT8390H .. 40 C to 150 CStorage Temper atur e Range .. 65 C to 150 CLT83903 Rev. CFor more information CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25 C (Note 2). VIN = 12V, VEN/UVLO = unless otherwise Operating Voltage Rangel460 VVIN Quiescent CurrentVEN/UVLO = VEN/UVLO = Not Switching1 270 A A mAVOUT Voltage Rangel060 VVOUT Quiescent CurrentVEN/UVLO = , VOUT = 12V VEN/UVLO = , VOUT = 12V Not Switching, VOUT = 12V 60 A A A Linear RegulatorsINTVCC Regulation VoltageIINTVCC = Load RegulationIINTVCC = 0mA to 80mA14%INTVCC Line RegulationIINTVCC = 20mA, VIN = 6V to 60V14%INTVCC Current LimitVINTVCC = Dropout Voltage (VIN INTVCC)

7 IINTVCC = 20mA, VIN = 4V160mVINTVCC Undervoltage Lockout Undervoltage Lockout Regulation VoltageIVREF = 100 Load RegulationIVREF = 0mA to Line RegulationIVREF = 100 A, VIN = 4V to Current LimitVREF = Undervoltage Lockout Undervoltage Lockout Hysteresis50mVORDER INFORMATIONLEAD FREE FINISHTAPE AND REELPART MARKING*PACKAGE DESCRIPTIONTEMPERATURE RANGEAUTOMOTIVE PRODUCTS** LT8390 EFE#WPBFLT8390 EFE#WTRPBFLT8390FE28-Lead Plastic TSSOP 40 C to 125 CLT8390 IFE#WPBFLT8390 IFE#WTRPBFLT8390FE28-Lead Plastic TSSOP 40 C to 125 CLT8390 JFE#WPBFLT8390 JFE#WTRPBFLT8390FE28-Lead Plastic TSSOP 40 C to 150 CLT8390 HFE#WPBFLT8390 HFE#WTRPBFLT8390FE28-Lead Plastic TSSOP 40 C to 150 CLT8390 EUFD#WPBFLT8390 EUFD#WTRPBF839028-Lead (4mm 5mm) Plastic QFN 40 C to 125 CLT8390 IUFD#WPBFLT8390 IUFD#WTRPBF839028-Lead (4mm 5mm)

8 Plastic QFN 40 C to 125 CLT8390 JUFD#WPBFLT8390 JUFD#WTRPBF839028-Lead (4mm 5mm) Plastic QFN 40 C to 150 CLT8390 HUFD#WPBFLT8390 HUFD#WTRPBF839028-Lead (4mm 5mm) Plastic QFN 40 C to 150 CContact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping and reel specifications. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.**Versions of this part are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. These models are designated with a #W suffix.

9 Only the automotive grade products shown are available for use in automotive applications. Contact your local Analog Devices account representative for specific product ordering information and to obtain the specific Automotive Reliability reports for these CFor more information CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25 C (Note 2). VIN = 12V, VEN/UVLO = unless otherwise Inputs/OutputsEN/UVLO Shutdown Enable Enable Hysteresis13mVEN/UVLO Hysteresis CurrentVEN/UVLO = VEN/UVLO = VEN/UVLO = A A ACTRL Input Bias CurrentVCTRL = , Current Out of Pin02050nACTRL Latch-Off ThresholdFallingl285300315mVCTRL Latch-Off Hysteresis25mVLoad Switch DriverLOADEN Hysteresis220mVMinimum VOUT for LOADTG to be OnVLOADEN = LOADTG On Voltage V(VOUT-LOADTG)VOUT = LOADTG Off Voltage V(VOUT-LOADTG)

10 VOUT = 12V LOADEN to LOADTG Turn On Propagation Delay LOADEN to LOADTG Turn Off Propagation DelayCLOADTG = to VOUT, 50% to 50% CLOADTG = to VOUT, 50% to 50%90 40ns nsLOADTG Turn On Fall Time LOADTG Turn Off Rise TimeCLOADTG = to VOUT, 10% to 90% CLOADTG = to VOUT, 90% to 10%300 10ns nsError AmplifierFull Scale Current Regulation V(ISP-ISN)VCTRL = 2V, VISP = 12V VCTRL = 2V, VISP = 0Vl l97 97100 100103 103mV mV1/10th Current Regulation V(ISP-ISN)VCTRL = , VISP = 12V VCTRL = , VISP = 0Vl l8 810 1012 12mV mVISMON Monitor Output VISMONV(ISP-ISN) = 100mV, VISP = 12V/0V V(ISP-ISN) = 10mV, VISP = 12V/0V V(ISP-ISN) = 0mV, VISP = 12V/0Vl l V VISP/ISN Input Common Mode Rangel060 VISP/ISN Low Side to High Side Switchover VoltageVISP = High Side to Low Side Switchover VoltageVISP = Input Bias CurrentVLOADEN = 5V, VISP = VISN = 12V VLOADEN = 5V, VISP = VISN = 0V VEN/UVLO = 0V, VISP = VISN = 12V or 0V23 10 0 A A AISN Input Bias CurrentVLOADEN = 5V, VISP = VISN = 12V VLOADEN = 5V, VISP = VISN = 0V VEN/UVLO = 0V, VISP = VISN = 12V or 0V23 10 0 A A AISP/ISN Current Regulation Amplifier gm2000 sFB Regulation VoltageVC = Line RegulationVIN = 4V to Load Voltage Regulation Amplifier gm660 SFB Input Bias CurrentFB in Regulation.