LTM4653 (Rev 0) - analog.com

1 LTM46531 Rev. AFor more information FeedbackTYPICAL APPLICATION FEATURESDESCRIPTIONEN55022B Compliant 58V, 4A Step-Down DC/DC Module Regulator4A, 24V Output Low EMI DC/DC Module Regulatorwith analog Output Current IndicatorAPPLICATIONS nComplete Low EMI Switch Mode Power Supply nEN55022 Class B Compliant nWide Input Voltage Range: to 58V nUp to 4A Output Current nOutput Voltage Range: VOUT VIN n Total DC Output Voltage Error Over Line, Load and Temperature ( 40 C to 125 C) nParallel and Current Share with Multiple LTM4653s nAnalog Output Current Indicator nProgrammable Input Voltage Limiting nConstant-Frequency Current Mode Control nPower Good Indicator and Programmable Soft-Start nOvercurrent/Overvoltage/Overtemperature Protection n15mm 9mm BGA Package nAvionics, Industrial Control and Test Equipment nVideo, Imaging and Instrumentation n48V Telecom and Network Power Supplies nRF Systems All registered trademarks and trademarks are the property of their respective owners.

2 Protected by Patents, including 5481178, 5705919, 5847554, Emission Scan in a 10m ChamberLTM4653 Delivering 24 VOUT at , from 48 VINPINS NOT USED IN THIS CIRCUIT: CLKIN, PGOOD, COMPb PGDFB, SW, EXTVCC TEMP+, TEMP , NCISETaGNDISETbVINSVINVDRUNINTVCCVINREGC OMPa fSETVOUTLTM465324 VOUT, UP TO 4 AIOUTANALOG OUTPUTCURRENT INDICATORVIMON = IOUT10 F 2 LOAD124k10nF499 FVIN28V TO 58V4653 TA01aVOSNSSGNDPGNDIMONaIMONbAMPLITUDE (dB V/m)50607040302010 100 FREQUENCY (MHz)30830130230330430530630730930100046 53 TA01b[1] HORIZONTAL[2] VERTICALQPK LIMITFORMALMEAS DIST 10mSPEC DIST 10m+The LTM 4653 is an ultralow noise 58V, 4A DC/DC step-down Module regulator designed to meet the radiated emissions requirements of EN55022. Conducted emis-sion requirements can be met by adding standard filter components. Included in the package are the switch-ing controller, power MOSFETs, inductor, filters and support over an input voltage range of to 58V, the LTM4653 supports an output voltage range of to 94% of VIN, and a switching frequency range of 250kHz to 3 MHz (400kHz default), each set by a single resistor.

3 For high load currents, the LTM4653 can be paralleled in PolyPhase operation and synchronized to an external clock. Only the bulk input and output filter capacitors are needed to finish the LTM4653 is offered in a 15mm 9mm BGA package with SnPb or RoHS compliant terminal AFor more information CONFIGURATIONABSOLUTE MAXIMUM RATINGST erminal Voltages VIN, VD, SVIN, SW, ISETa, VOUT, VOSNS .. to 60V GND, ISETb, EXTVCC .. to 28V RUN ..GND to PGND+60V INTVCC, PGDFB, VINREG, COMPa, COMPb, IMONa, IMONb .. to 4V fSET .. to INTVCC CLKIN, PGOOD (Relative to GND) .. to 6 VTerminal Currents INTVCC Peak Output Current (Note 8) ..30mA TEMP+ .. 1mA to 10mA TEMP .. 10mA to 1mATemperatures Internal Operating Temperature Range (Note 2) .. 40 C to 125 C Storage Temperature Range .. 55 C to 125 C Peak Solder Reflow Package Body Temperature.

4 245 C(Note 1) (All Voltages Relative to VOUT Unless Otherwise Indicated)1 ABCDEFGHJKL234 TOP VIEW567 VINVDVOUTTEMP NCNCIMONaNCSWGNDSVINVINREGSGNDfSETRUNPGO ODPGDFBCLKINPGNDPGNDSGNDVOSNSEXTVCCINTVC CCOMPbCOMPaISETbISETaTEMP+TEMP TEMP+IMONbBGA PACKAGE77-PIN (15mm 9mm )TJ(MAX) = 125 C; JA = C/W; JCtop = C/W; JCbot = C/W;WEIGHT = GRAMSNOTES: 1) VALUES ARE DETERMINED BY SIMULATION PER JESD51 ) JA VALUE IS OBTAINED WITH DEMO ) REFER TO APPLICATION INFORMATION SECTION FOR LAB MEASUREMENT AND DERATING INFORMATION. ORDER INFORMATIONPART NUMBERPAD OR BALL FINISHPART MARKING*PACKAGE TYPEMSL RATINGTEMPERATURE RANGE (SEE NOTE 2)DEVICE FINISH CODELTM4653EY#PBFSAC305 (RoHS)LTM4653Ye1 BGA3 40 C to 125 CLTM4653IY#PBFSAC305 (RoHS)e1 40 C to 125 CLTM4653 IYSnPb (63/37)e0 40 C to 125 C Contact the factory for parts specified with wider operating temperature ranges.

5 *Pad or ball finish code is per IPC/JEDEC J-STD-609. Recommended LGA and BGA PCB Assembly and Manufacturing Procedures LGA and BGA Package and Tray DrawingsLTM46533 Rev. AFor more information The l denotes the specifications which apply over the specified internal operating temperature range (Note 2). TA = 25 C, Test Circuit, VIN = SVIN = 48V, EXTVCC = 24V, RUN = , RISET = 480k, RfSET = , fSW = (CLKIN driven with clock signal) unless otherwise (DC), VIN(DC)Input DC (RANGE)Range of Output Voltage ISETa - SGND , IOUT = 0A (See Note 6) VVOUT(24 VDC)Output Voltage Total Variation with Line and Load at VOUT = 24V28V VIN 58V, 0A IOUT 4A, CINH = F, CD = F, COUTH = 2 47 F, CLKIN driven with ( )Output Voltage Total Variation with Line and Load at VOUT = VOSNS - ISETa VIN , 0A IOUT 4A, CINH = F, CD = F, COUTH = 2 47 F, ISETa = 500mV, RfSET = N/U (Note 5)l 15015mVInput SpecificationsVIN(UVLO)SVIN Undervoltage Lockout ThresholdSVIN Rising SVIN Falling Hysteresisl l l V mVVIN(OVLO)SVIN Overvoltage Lockout Rising(Note 4)6468 VVIN(HYS)SVIN Overvoltage Lockout Hysteresis(Note 4)

6 24 VIINRUSH(VIN)Input Inrush Current at Start-UpCINH = F, CD = F, COUTH = 2 47 F; IOUT = 0A, ISETa Electrically Connected to ISETb300mAIQ(SVIN)Input Supply Bias CurrentShutdown, RUN = GND RUN = VIN16 45030 A AIS(VIN, FCM)Input Supply CurrentCLKIN Open Circuit, IOUT = (VIN, SHUTDOWN)Input Supply Current in ShutdownShutdown, RUN = GND4 AOutput SpecificationsIOUTVOUT Output Continuous Current Range(Note 3)04A VOUT(LINE)/VOUTLine Regulation AccuracyIOUT = 0A, 28V VIN VOUT(LOAD)/VOUTLoad Regulation AccuracyVIN = 48V, 0A IOUT (AC)Output Voltage Ripple, VOUTVIN = 12V, ISETa = 5V2mVP PfsVOUT Ripple FrequencyISETa = 5V, RfSET = , CLKIN Open VOUT(START)Turn-On Overshoot8mVtSTARTTurn-On Start-Up TimeDelay Measured from VIN Toggling from 0V to 48V to PGOOD Exceeding 3V; PGOOD Having a 100k Pull-Up to , VPGFB Resistor-Divider Network as Shown in Test Circuit, RISETa = 480k, ISETa Electrically Connected to ISETb and CLKIN Driven with Clockl49ms VOUT(LS)Peak Output Voltage Deviation for Dynamic Load StepIOUT: 0A to 2A and 2A to 0A Load Steps in 1 s, COUTH = 47 F 2400mVtSETTLES ettling Time for Dynamic Load StepIOUT: 0A to 2A and 2A to 0A Load Steps in 1 s, COUTH = 47 F 250 sIOUT(OCL)IOUT Output Current SectionIISETaReference Current of ISETa PinVISETa = , VIN VISETa = 24V, 28V VIN 58Vl 4950 51 A AIVOSNSVOSNS Leakage CurrentVIN = SVIN = RUN = ISETa = 58V600 AtON(MIN)Minimum On-Time(Note 4 )60nsELECTRICAL CHARACTERISTICSLTM46534 Rev.

7 AFor more information The l denotes the specifications which apply over the specified internal operating temperature range (Note 2). TA = 25 C, Test Circuit, VIN = SVIN = 48V, EXTVCC = 24V, RUN = , RISET = 480k, RfSET = , fSW = (CLKIN driven with clock signal) unless otherwise Turn-On/-Off ThresholdsRUN Input Turn-On Threshold, RUN Rising RUN mVIRUNRUN Leakage CurrentRUN = and Phase-Locked Loop (PLL)fOSCO scillator Frequency AccuracyVIN = 12V, ISETa = 5V, and: fSET Open Circuit RfSET = (See fs Specification) l 360 400 440 kHz MHzfSYNCPLL Synchronization Capture RangeVIN = 12V, ISETa = 5V, CLKIN Driven with a GND-Referred Clock Toggling from to and Having a Clock Duty Cycle: From 10% to 90%; fSET Open Circuit From 40% to 60%.

8 RfSET = 250 550 3 kHz MHzVCLKINCLKIN Input ThresholdVCLKIN Rising VCLKIN VICLKINCLKIN Input CurrentVCLKIN = 5V VCLKIN = 0V 20230 5500 A APower Good Feedback Input and Power Good OutputOVPGDFBO utput Overvoltage PGOOD Upper ThresholdPGDFB Risingl620645675mVUVPGDFBO utput Undervoltage PGOOD Lower ThresholdPGDFB Fallingl525555580mV VPGDFBPGOOD HysteresisPGDFB Returning8mVRPGDFBR esistor Between PGDFB and RPGOODPGOOD Pull-Down ResistanceVPGOOD = , VPGDFB < UVPGDFB or VPGDFB > OVPGDFB7001500 IPGOOD(LEAK)PGOOD Leakage CurrentVPGOOD = , UVPGDFB < VPGDFB < AtPGOOD(DELAY)PGOOD DelayPGOOD Low to High (Note 4) PGOOD High to Low (Note 4)16/fSW(HZ) 64/fSW(HZ)s sCurrent Monitor and Input Voltage Regulation PinshIMONaIOUT/IIMONaRatio of VOUT Output Current to IIMONa Current, IOUT = 4Al364044kIOS(IMON)IMONa Offset CurrentIIMONa at IOUT = 0A 55 AIMONb ResistorResistor Between IMONb and VIMONaIMONa Servo VoltageIMONa Voltage During Output Current Servo VoltageVINREG Voltage During Output Current Leakage CurrentVINREG = 2V1nAINTVCC RegulatorVINTVCCC hannel Internal VCC Voltage, No INTVCC Loading (IINTVCC = 0mA) SVIN 58V, EXTVCC = Open Circuit 5V SVIN 58V, EXTVCC VVEXTVCC(TH)EXTVCC Switchover Voltage(Note 4) VINTVCC(LOAD)/VINTVCCINTVCC Load Regulation0mA IINTVCC 30mA CHARACTERISTICSLTM46535 Rev.

9 AFor more information The l denotes the specifications which apply over the specified internal operating temperature range (Note 2). TA = 25 C, Test Circuit, VIN = SVIN = 48V, EXTVCC = 24V, RUN = , RISET = 480k, RfSET = , fSW = (CLKIN driven with clock signal) unless otherwise 1: Stresses beyond those listing under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating conditions for extended periods may affect device reliability and 2: The LTM4653 is tested under pulsed load conditions such that TJ TA. The LTM4653E is guaranteed to meet performance specifications over the 0 C to 125 C internal operating temperature range.

10 Specifications over the full 40 C to 125 C internal operating temperature range are assured by design, characterization and correlation with statistical process controls. The LTM4653I is guaranteed to meet specifications over the full internal operating temperature range. Note that the maximum ambient temperature consistent with these specifications is determined by specific operating conditions in conjunction with board layout, the rated package thermal resistance and other environmental 3: See output current derating curves for different VIN, VOUT, and TA, located in the Applications Information 4: Minimum on-time, VIN Overvoltage Lockout and Overvoltage Lockout Hysteresis, and EXTVCC Switchover Threshold are tested at wafer 5: To ensure minimum on time criteria is met, VOUT( ) high-line regulation is tested at , with fSET and CLKIN open circuit.