LTM4622 (Rev. H) - Analog Devices

1 LTM46221 Rev. HFor more information registered trademarks and trademarks are the property of their respective APPLICATION FEATURESDESCRIPTIONDual Ultrathin or Single 5A Step-Down DC/DC Module RegulatorThe LT M 4622 is a complete dual step-down switch-ing mode Module (powermodule) regulator in a tiny ultrathin LGA and BGA packages. Included in the pack-age are the switching controller, power FETs, inductor and support components. Operating over an input voltage range of to 20V, the LTM4622 supports an output voltage range of to , set by a single external resistor.

2 Its high efficiency design delivers dual con-tinuous, 3A peak, output current. Only a few ceramic input and output capacitors are LTM4622 supports selectable Burst Mode operation and output voltage tracking for supply rail sequencing. Its high switching frequency and current mode control enable a very fast transient response to line and load changes without sacrificing protection features include input overvoltage, output overcurrent and overtemperature LTM4622 is available with SnPb (BGA) or RoHS com-pliant terminal and 1V Dual Output DC/DC Step-Down Module Output Efficiency vs Load CurrentAPPLICATIONS nComplete Solution in <1cm2 nWide Input Voltage Range.

3 To 20V Input Compatible with VIN Tied to INTVCC to Output Voltage nDual (3A Peak) or Single 5A Output Current n Maximum Total Output Voltage Regulation Error Over Load, Line and Temperature nCurrent Mode Control, Fast Transient Response nExternal Frequency Synchronization nMultiphase Parallelable with Current Sharing nOutput Voltage Tracking and Soft-Start Capability nSelectable Burst Mode Operation nOvervoltage Input and Overtemperature Protection nPower Good Indicators LGA and BGA Packages nGeneral Purpose Point-of-Load Conversion nTelecom.

4 Networking and Industrial Equipment nMedical Diagnostic Equipment nTest and Debug SystemsLOAD CURRENT (A)0 EFFICIENCY (%)80859034622 = 5 VVIN = 12 VDocument TO 20 VVOUT11V, , FVOUT2FB1 COMP1 COMP2 GNDLTM4622 PGOOD1 PGOOD2 VIN2 VIN1 RUN1 RUN2 INTVCCSYNC/MODETRACK/SS1 HFor more information CONFIGURATIONABSOLUTE MAXIMUM RATINGSVIN1, VIN2 .. to 22 VVOUT .. to 6 VPGOOD1, PGOOD2 .. to 18 VRUN1, RUN2 .. to VIN + , TRACK/SS1 , TRACK/SS2 .. to , COMP1 , COMP2,FB1, FB2 .. to INTVCCO perating Internal Temperature Range(Note 2) .. 40 C to 125 CStorage Temperature Range.

5 55 C to 125 CPeak Solder Reflow Body Temperature ..260 C(Note 1)(See Pin Functions, Pin Configuration Table)PART NUMBERPAD OR BALL FINISHPART MARKING*PACKAGE TYPEMSL RATINGTEMPERATURE RANGE (Note 2)DEVICE FINISH CODELT M4622EV#PBFAu (RoHS)LT M4622Ve4 LGA4 40 C to 125 CLT M4622IV#PBFAu (RoHS)LT M4622Ve4 LGA4 40 C to 125 CLT M4622EY#PBFSAC305 (RoHS)LT M4622Ye1 BGA4 40 C to 125 CLT M4622IY#PBFSAC305 (RoHS)LT M4622Ye1 BGA4 40 C to 125 CLT M4622 IYSnPb (63/37)LT M4622Ye0 BGA4 40 C to 125 C Device temperature grade is indicated by a label on the shipping container. Pad or ball finish code is per IPC/JEDEC J-STD-609.

6 BGA Package and Tray Drawings This product is not recommended for second side reflow. This product is moisture sensitive. For more information, go to Recommended BGA PCB Assembly and Manufacturing PACKAGE25-LEAD ( )TJMAX = 125 C, JCtop = 17 C/W, JCbottom = 11 C/W, JB + BA = 22 C/W, JA = 22 C/W, WEIGHT = VIEWCOMP2 SYNC/MODEFREQVOUT1FB1 PGOOD1 TRACK/SS1A51234 PGOOD2FB2 TRACK/SS2 INTVCCRUN2 BCDECOMP1 GNDGNDRUN1 GNDVIN1 VIN1 VIN2 VIN2 VOUT2 BGA PACKAGE25-LEAD ( )TJMAX = 125 C, JCtop = 17 C/W, JCbottom = 11 C/W, JB + BA = 22 C/W, JA = 22 C/W, WEIGHT = VIEWCOMP2 SYNC/MODEFREQVOUT1FB1 PGOOD1 TRACK/SS1A51234 PGOOD2FB2 TRACK/SS2 INTVCCRUN2 BCDECOMP1 GNDGNDRUN1 GNDVIN1 VIN1 VIN2 VIN2 VOUT2 ORDER INFORMATIONLTM46223 Rev.

7 HFor more information CHARACTERISTICS The l denotes the specifications which apply over the full internal operating temperature range (Note 2). Specified as each individual output channel at TA = 25 C, VIN1 = VIN2 = 12V, unless otherwise noted per the typical application shown in Figure Regulator Section: per ChannelVIN1 Input DC DC < VIN1 < Input DC VoltageVIN1 = VIN2 = (RANGE)Output Voltage RangeVIN1 = VIN2 = to (DC)Output Voltage, Total Variation with Line and LoadCIN = 22 F, COUT = 100 F Ceramic, RFB = , MODE = INTVCC, VIN1 = VIN2 = to 20V, IOUT = 0A to Pin On ThresholdRUN Threshold Rising RUN Threshold VIQ(VIN)Input Supply Bias CurrentVIN1 = VIN2 = 12V, VOUT = , MODE = GND VIN1 = VIN2 = 12V, VOUT = , MODE = INTVCC Shutdown, RUN1 = RUN2 = 011 500 45mA A AIS(VIN)Input Supply CurrentVIN1 = VIN2 = 12V, VOUT = , IOUT = (DC)

8 Output Continuous Current Range VIN1 = VIN2 = 12V, VOUT = (Note 3) VOUT (Line)/VOUTLine Regulation AccuracyVOUT = , VIN1 = VIN2 = to 20V, IOUT = VOUT (Load)/VOUTLoad Regulation AccuracyVOUT = , IOUT = 0A to (AC)Output Ripple VoltageIOUT = 0A, COUT = 100 F Ceramic, VIN1 = VIN2 = 12V, VOUT = VOUT(START)Turn-On OvershootIOUT = 0A, COUT = 100 F Ceramic, VIN1 = VIN2 = 12V, VOUT = 30mVtSTARTTurn-On TimeCOUT = 100 F Ceramic, No Load, TRACK/SS = F, VIN1 = VIN2 = 12V, VOUT = VOUTLSPeak Deviation for Dynamic LoadLoad: 0% to 50% to 0% of Full Load, COUT = 100 F Ceramic, VIN1 = VIN2 = 12V, VOUT = 100mVtSETTLES ettling Time for Dynamic Load StepLoad.

9 0% to 50% to 0% of Full Load, COUT = 100 F Ceramic, VIN1 = VIN2 = 12V, VOUT = 20 sIOUTPKO utput Current LimitVIN1 = VIN2 = 12V, VOUT = at FB PinIOUT = 0A, VOUT = at FB Pin(Note 4) 30nARFBHIR esistor Between VOUT and FB ITRACK/SSTrack Pin Soft-Start Pull-Up CurrentTRACK/SS = AtSSInternal Soft-Start Time10% to 90% Rise Time (Note 4)400700 stON(MIN)Minimum On-Time(Note 4)20nstOFF(MIN)Minimum Off-Time(Note 4)45nsVPGOODPGOOD Trip LevelVFB With Respect to Set Output VFB Ramping Negative VFB Ramping Positive 8 8 14 14 % %LTM46224 Rev. HFor more information CHARACTERISTICSNote 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device.

10 Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and 2: The LTM4622 is tested under pulsed load conditions such that TJ TA. The LTM4622E is guaranteed to meet performance specifications over the 0 C to 125 C internal operating temperature range. 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 LTM4622I is guaranteed to meet specifications over the full 40 C to 125 C internal operating temperature range.