LTM4627 - 15A DC/DC µModuleRegulator

1 LTM462714627fcFor more information APPLICATIONDESCRIPTION15A DC/DC ModuleRegulatorThe LT M 4627 is a complete 15A output high efficiency switch mode DC/DC power supply. Included in the pack-age are the switching controller, power FETs, inductor and compensation components. Operating over an input voltage range from to 20V, the LTM4627 supports an output voltage range of to 5V, set by a single external resistor. Only a few input and output capacitors are needed. Current mode operation allows precision current sharing of up to four LTM4627 regulators to obtain 60A output. High switching frequency and a current mode architecture enable a very fast transient response to line and load changes without sacrificing stability.

2 The device supports frequency synchronization, multiphase/current sharing operation, Burst Mode operation and output voltage track-ing for supply rail sequencing. The LTM4627 is offered in thermally enhanced 15mm 15mm LGA and 15mm 15mm BGA packages. The LTM4627 is available with SnPb (BGA) or RoHS compliant terminal , LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode, Module and PolyPhase are registered trademarks and LTpowerCAD is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by Patents, including 5481178, 5847554, 6580258, 6304066, 6476589, 6774611, , 15A DC/DC Module RegulatorFEATURESAPPLICATIONSn Complete 15A Switch Mode Power Supply n Wide Input Voltage Range.

3 To 20Vn to 5V Output Rangen Total DC Output Errorn Differential Remote Sense Amplifier for Precision Regulationn Current Mode Control/ Fast Transient Responsen Frequency Synchronizationn Parallel Current Sharing (Up to 60A) n Selectable Pulse-Skipping or Burst Mode Operationn Soft-Start/Voltage Trackingn Up to 93% Efficiency (12 VIN, )n Overcurrent Foldback Protectionn Output Overvoltage Protection n Small Surface Mount Footprint, Low Profile 15mm 15mm LGA and 15mm 15mm BGA Packagesn Telecom Servers and Networking Equipmentn ATCA and Storage Cardsn Industrial Equipmentn Medical SystemsEfficiency vs Load CurrentCOMPTRACK/SSRUNfSETMODE_PLLINPGOO DVOUTVOUT_LCLDIFF_OUTVOSNS+VOSNS VFBLTM4627 VIN10kRFB** F16V F470 F* * SEE TABLE 4** SEE TABLE 14627 TO 16 VSGNDGND150pF+LOAD CURRENT (A)050 EFFICIENCY (%)556570758548104627 TA01b609095802612141612 VIN, , more information MAXIMUM RATINGSVIN.

4 To 22 VINTVCC, VOUT (VOUT with DIFF AMP), VOUT_LCL, PGOOD, EXTVCC .. to 6 VMODE_PLLIN, fSET, TRACK/SS, VOSNS , VOSNS+, DIF F_OU T .. to INTVCCCOMP, to (Note 5) .. to 5V(Note 1)INTVCC Peak Output Current (Note 6) ..100mAInternal Operating Temperature Range (Note 2) .. E and I-Grades .. 40 C to 125 C MP-Grade .. 55 C to 125 CStorage Temperature Range .. 55 C to 125 CReflow (Peak Body) Temperature ..250 CBGA PACKAGE133-LEAD (15mm 15mm )1234567810911 12 BCDEFGHJKLAMTOP VIEWVOUTVINGNDVOUTVININTVCCfSETCOMPTRACK /SSMODE_PLLININTVCCSGNDEXTVCCVFBPGOODPGO ODRUNVOSNS+DIFF_OUTVOUT_LCLVOSNS TJ(MAX) = 125 C, JA = C/W, JCbottom = C/W, JCtop = 15 C/W, JB = C/W, VALUES DETERMINED PER JESD 51-12 USING A JESD 51-9 DEFINED PCB WEIGHT = PACKAGE133-LEAD (15mm 15mm )VIN1234567810911 12 BCDEFGHJKLAMINTVCCfSETCOMPTRACK/SSMODE_P LLININTVCCTOP VIEWSGNDVOUTVINGNDVOUTEXTVCCVFBPGOODPGOO DRUNVOSNS+DIFF_OUTVOUT_LCLVOSNS TJ(MAX)

5 = 125 C, JA = C/W, JCbottom = C/W, JCtop = 15 C/W, JB = C/W, VALUES DETERMINED PER JESD 51-12 USING A JESD 51-9 DEFINED PCB WEIGHT = CONFIGURATIONORDER INFORMATIONPART NUMBERPAD OR BALL FINISHPART MARKING*PACKAGE TYPEMSL RATINGTEMPERATURE RANGE (Note 2)DEVICE FINISH CODELTM4627EV#PBFAu (RoHS)LTM4627Ve4 LGA3 40 C to 125 CLTM4627IV#PBFAu (RoHS)LTM4627Ve4 LGA3 40 C to 125 CLTM4627EY#PBFSAC305 (RoHS)LTM4627Ye1 BGA3 40 C to 125 CLTM4627IY#PBFSAC305 (RoHS)LTM4627Ye1 BGA3 40 C to 125 CLTM4627 IYSnPb (63/37)LTM4627Ye0 BGA3 40 C to 125 CLTM4627 MPY#PBFSAC305 (RoHS)LTM4627Ye1 BGA3 55 C to 125 CLTM4627 MPYSnPb (63/37)LTM4627Ye0 BGA3 55 C to 125 CConsult Marketing for parts specified with wider operating temperature ranges.

6 *Device temperature grade is indicated by a label on the shipping container. Pad or ball finish code is per IPC/JEDEC J-STD-609. Terminal Finish Part Marking: Recommended LGA and BGA PCB Assembly and Manufacturing Procedures: LGA and BGA Package and Tray Drawings: more information CHARACTERISTICS The l denotes the specifications which apply over the specified internal operating temperature range, otherwise specifications are at TA = 25 C (Note 2), VIN = 12V, per the typical application in Figure DC (DC)Output Voltage, Total Variation with Line and LoadCIN = 22 F 3 COUT = 100 F Ceramic, 470 F POSCAP RFB = , MODE_PLLIN = GND VIN = 5V to 20V, IOUT = 0A to 15A (Note 4)

7 SpecificationsVRUNRUN Pin On ThresholdVRUN Pin On Hysteresis130mVIQ(VIN)Input Supply Bias CurrentVIN = 12V, VOUT = , Burst Mode Operation, IOUT = VIN = 12V, VOUT = , Pulse-Skipping Mode, IOUT = VIN = 12V, VOUT = , Switching Continuous, IOUT = Shutdown, RUN = 0, VIN = 12V17 25 54 40mA mA mA AIS(VIN)Input Supply CurrentVIN = 5V, VOUT = , IOUT = 15A VIN = 12V, VOUT = , IOUT = AOutput SpecificationsIOUT(DC)Output Continuous Current Range VIN = 12V, VOUT = (Note 4)015A VOUT (Line) VOUTLine Regulation AccuracyVOUT = , VIN from to 20V IOUT = VOUT (Load) VOUTLoad Regulation AccuracyVOUT = , IOUT = 0A to 15A, VIN = 12V (Note 4) (AC)Output Ripple VoltageIOUT = 0A, COUT = 100 F Ceramic, 470 F POSCAP VIN = 12V, VOUT = VOUT(START)Turn-On OvershootCOUT = 100 F Ceramic, 470 F POSCAP, VOUT = , IOUT = 0A, VIN = 12V20mVtSTARTTurn-On TimeCOUT = 100 F Ceramic, 470 F POSCAP, No Load, TRACK/SS = F, VIN = VOUTLSPeak Deviation for Dynamic LoadLoad: 0% to 50% to 0% of Full Load COUT = 100 F Ceramic, 470 F POSCAP, VIN = 12V, VOUT = Time for Dynamic Load StepLoad.

8 0% to 50% to 0% of Full Load VIN = 5V, COUT = 100 F Ceramic, 470 F POSCAP20 sIOUTPKO utput Current LimitVIN = 12V, VOUT = VIN = 5V, VOUT = 25A AControl SectionVFBV oltage at VFB PinIOUT = 0A, VOUT = at VFB Pin(Note 7) 12 25nAVOVLF eedback Overvoltage Pin Soft-Start Pull-Up CurrentTRACK/SS = AtON(MIN)Minimum On-Time(Note 3)90nsRFBHIR esistor Between VOUT_LCL and VFB VOSNS+, VOSNS CM RANGEC ommon Mode Input RangeVIN = 12V, Run > (MAX)Maximum DIFF_OUT Voltage IDIFF_OUT = 300 AINTVCC more information Offset VoltageVOSNS+ = VDIFF_OUT = , IDIFF_OUT = 100 A2mVAVD ifferential Gain(Note 7)1V/VSRSlew Rate(Note 6)2V/ sGBPGain Bandwidth Product(Note 6)3 MHzCMRRC ommon Mode Rejection(Note 7)60dBIDIFF_OUTDIFF_OUT CurrentSourcing2mAPSRRP ower Supply Rejection Ratio5V < VIN < 20V (Note 7)

9 100dBRINI nput ResistanceVOSNS+ to GND80k VPGOODPGOOD Trip LevelVFB With Respect to Set Output VFB Ramping Negative VFB Ramping Positive 10 10 % %VPGLPGOOD Voltage LowIPGOOD = Linear RegulatorVINTVCCI nternal VCC Voltage6V < VIN < Load Reg INTVCC Load RegulationICC = 0 to VCC SwitchoverEXTVCC Ramping ExtEXTVCC Voltage DropICC = 25mA, VEXTVCC = 5V50100mVOscillator and Phase-Locked LoopfSYNCF requency Sync Capture RangeMODE_PLLIN Clock Duty Cycle = 50%250800kHzfNOMN ominal FrequencyVfSET = FrequencyVfSET = 1V350400450kHzfHIGHH ighest FrequencyVfSET Set Current91011 ARMODE_PLLINMODE_PLLIN Input Resistance250k VIH_MODE_PLLINC lock Input Level Input Level CHARACTERISTICS The l denotes the specifications which apply over the specified internal

10 Operating temperature range, otherwise specifications are at TA = 25 C (Note 2), VIN = 12V, per the typical application in Figure 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and 2: The LTM4627 is tested under pulsed load conditions such that TJ TA. The LTM4627E is guaranteed to meet performance specifications over the 0 C to 125 C internal operating temperature range. Specifications over the 40 C to 125 C internal operating temperature range are assured by design, characterization and correlation with statistical process controls.