LTM8054 - 36VIN, 5.4A Buck-Boost µModule …

1 LTM805418054faFor more information APPLICATION FEATURESDESCRIPTION36 VIN, Buck-Boost Module RegulatorThe LT M 8054 is a 36 VIN, Buck-Boost Module (micromodule) regulator. Included in the package are the switching controller, power switches, inductor and support components. A resistor to set the switching frequency, a resistor divider to set the output voltage, and input and output capacitors are all that are needed to complete the design. Other features such as input and output average current regulation may be implemented with just a few components. The LTM8054 operates over an input volt-age range of 5V to 36V, and can regulate output voltages between and 36V. The SYNC input and CLKOUT output allow easy LTM8054 is housed in a compact overmolded ball grid array (BGA) package suitable for automated assembly by standard surface mount equipment. The LTM8054 is RoHS Boost Selection TableLTM8054 LTM8055 LTM8056 VIN (Operation)363658 VIN Abs Max404060 VOUT Abs Max404060 IOUT (Peak) 24 VIN, x x BGA15 x 15mm x BGA15 x 15mm x BGA12 VOUT from 5V to 35 VIN Buck Boost RegulatorAPPLICATIONS nComplete Buck-Boost Switch Mode Power Supply nWide Input Voltage Range: 5V to 36V nWide Output Voltage Range: to 36V nVIN May Be Greater than, Equal to or Less than VOUT n12 Output from 6 VIN n12 Output from 12 VIN n12 Output from 24 VIN nUp to 94% Efficient nAdjustable Input and Output Average Current Limits nInput and Output Current Monitors nParallelable for Increased Output Current nSelectable Switching Frequency.

2 100kHz to 800kHz nSynchronization from 200kHz to 700kHz 15mm BGA Package nHigh Power Battery-Operated Devices nIndustrial Control nSolar Powered Voltage Regulator nSolar Powered Battery ChargingL, LT, LT C, LT M, Linear Technology, the Linear logo, Module and Burst Mode are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TA01a22 F25V68 F50V 2 VIN6V TO TA01b40302010 EFFICIENCY (%)OUTPUT CURRENT (A)INPUT VOLTAGE (V)EFFICIENCYMAX CURRENTM aximum Output Current and Efficiency vs Input VoltageLTM805428054faFor more information CONFIGURATIONABSOLUTE MAXIMUM RATINGSVIN, SVIN, VOUT, RUN, IIN, IOUT Voltage ..40 VFB, SYNC, CTL, MODE Voltage ..6 VIINMON, IOUTMON Voltage ..6 VLL Voltage ..15 VMaximum Junction Temperature (Notes 2, 3 ) ..125 CStorage 55 to 125 CPeak Solder Reflow Body Temperature ..245 C(Note 1)1 ABCDEFGHJKL2345 TOP VIEWBGA PACKAGE88-LEAD (15mm )678 BANK 1 BANK 3 BANK 2 VOUTIOUTVINSVINGNDCLKOUTRTLLSYNCMODESSGN DRUNIINMONIOUTMONCTLFB COMPIIN TJMAX = 125 C, JA = C/W, JCbottom = C/W, JCtop = C/W, JB = C/W, WEIGHT = , VALUES DETERMINED PER JEDEC 51-9, 51-12 ORDER INFORMATIONPART NUMBERTERMINAL FINISHPART MARKING*PACKAGE TYPEMSL RATINGTEMPERATURE RANGE (SEE NOTE 2)DEVICE FINISH CODELTM8054EY#PBFSAC305 (RoHS)LTM8054Ye1 BGA3 40 C to 125 CLTM8054IY#PBFSAC305 (RoHS)LTM8054Ye1 BGA3 40 C to 125 CLTM8054 IYSnPb(63/37)LTM8054Ye0 BGA3 40 C to 125 CLTM8054 MPY#PBFSAC305 (RoHS)LTM8054Ye1 BGA3 55 C to 125 CLTM8054 MPYSnPb(63/37)LTM8054Ye0 BGA3 55 C to 125 CConsult Marketing for parts specified with wider operating temperature ranges.

3 *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: #orderinfoLTM805438054faFor more information CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25 C. RUN = unless otherwise noted. (Note 2)PARAMETERCONDITIONSMINTYPMAXUNITSM inimum Input VoltageVIN = DC VoltageFB = VOUT Through 100k RFB = 100 36V VOutput DC CurrentVIN = 6V, VOUT = 12V VIN = 24V, VOUT = AQuiescent Current Into VIN (Tied to SVIN)RUN = (Disabled) No Load, MODE = (DCM) No Load, MODE = (FCM) 8 451 30 100 A mA mAOutput Voltage Line Regulation5V < VIN < 36V, IOUT = Voltage Load RegulationVIN = 24V, < IOUT < RMS Voltage RippleVIN = 24V, IOUT = 3A25mVSwitching FrequencyRT = 453k RT = 800kHz kHzVoltage at FB Pin VRUN Falling Threshold LTM8054 Stops HysteresisLTM8054 Starts Switching25mVRUN Low Threshold LTM8054 Pin CurrentRUN = 1V RUN = 100 A nAIIN Bias Current 90 AInput Current Sense Threshold (IIN-VIN)l4456mVIOUT Bias Current20 AOutput Current Sense Threshold (VOUT-IOUT)

4 VCTL = Openl5363mVIINMON VoltageLTM8054 in Input Current VoltageLTM8054 in Output Current Input Bias CurrentVCTL = 0V22 ASS Pin CurrentVSS = 0V35 ACLKOUT Output High10k to GND4 VCLKOUT Output Low10k to Input Low Input High Bias CurrentSYNC = 1V11 AMODE Input Low Input High 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 LTM8054E is guaranteed to meet performance specifications from 0 C to 125 C internal. 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 LTM8054I is guaranteed to meet specifications over the full 40 C to 125 C internal operating temperature range. The LTM8054MP is guaranteed to meet specifications over the full 55 C to 125 C internal operating temperature range.

5 Note that the maximum internal temperature is determined by specific operating conditions in conjunction with board layout, the rated package thermal resistance and other environmental 3: The LTM8054 contains overtemperature protection that is intended to protect the device during momentary overload conditions. The internal temperature exceeds the maximum operating junction temperature when the overtemperature protection is active. Continuous operation above the specified maximum operating junction temperature may impair device more information PERFORMANCE CHARACTERISTICSI nput Current vs Output Current ( )Input Current vs Output Current (5 VOUT)8 VOUT Efficiency12 VOUT Efficiency18 VOUT Efficiency24 VOUT Efficiency36 VOUT Efficiency5 VOUT EfficiencyTA = 25 C, unless otherwise CURRENT (A)0 EFFICIENCY (%)1005090708060408054 G016153426 VIN12 VIN19 VINOUTPUT CURRENT (A)0 EFFICIENCY (%)1005090708060408054 G026153426 VIN12 VIN24 VINOUTPUT CURRENT (A)0 EFFICIENCY (%)1005090708060408054 G036421536 VIN12 VIN24 VINOUTPUT CURRENT (A)0 EFFICIENCY (%)1005090708060408054 G046421536 VIN12 VIN24 VIN35 VINOUTPUT CURRENT (A)0 EFFICIENCY (%)10090708060508054 G056421536 VIN12 VIN24 VIN36 VINOUTPUT CURRENT (A)0 EFFICIENCY (%)1005090708060408054 G066421536 VIN12 VIN24 VIN36 VINOUTPUT CURRENT (A)0 EFFICIENCY (%)100907080608054 G0742136 VIN12 VIN24 VIN36 VINOUTPUT CURRENT (A)0 INPUT CURRENT (A)

6 431208054 G086214356 VIN12 VIN19 VINOUTPUT CURRENT (A)0 INPUT CURRENT (A)431208054 G096153246 VIN12 VIN24 VINLTM805458054faFor more information PERFORMANCE CHARACTERISTICSI nput Current vs Output Current (12 VOUT)Input Current vs Output Current (18 VOUT)Input Current vs Output Current (24 VOUT)Input Current vs Output Current (36 VOUT)Input Current vs Output Current (8 VOUT)TA = 25 C, unless otherwise Output Current vs Input Voltage ( , 5 VOUT, 8 VOUT)Maximum Output Current vs Input Voltage (12 VOUT, 18 VOUT, 24 VOUT, 36 VOUT)Junction Temperature Rise vs Output Current ( )Junction Temperature Rise vs Output Current (5 VOUT)OUTPUT CURRENT (A)0 INPUT CURRENT (A)5431208054 G106153246 VIN12 VIN24 VINOUTPUT CURRENT (A)0 INPUT CURRENT (A)5431208054 G116245136 VIN12 VIN24 VIN35 VINOUTPUT CURRENT (A)0 INPUT CURRENT (A)5431208054 G126245136 VIN12 VIN24 VIN36 VINOUTPUT CURRENT (A)0 INPUT CURRENT (A)5431208054 G136245136 VIN12 VIN24 VIN36 VINOUTPUT CURRENT (A)0 INPUT CURRENT (A)431208054 G1442136 VIN12 VIN24 VIN36 VININPUT VOLTAGE (V)0 MAXIMUM OUTPUT CURRENT (A)653428054 VOLTAGE (V)0 MAXIMUM OUTPUT CURRENT (A)65240318054 G163612624183012 VOUT18 VOUT24 VOUT36 VOUTOUTPUT CURRENT (A)0 TEMPERATURE ( C)7060204050103008054 G176214356 VIN12 VIN19 VINOUTPUT CURRENT (A)0 TEMPERATURE ( C)10060708090204050103008054 G186214356 VIN12 VIN19 VINLTM805468054faFor more information PERFORMANCE CHARACTERISTICSJ unction Temperature Rise vs Output Current (8 VOUT)Junction Temperature Rise vs Output Current (12 VOUT)Junction Temperature Rise vs Output Current (18 VOUT)TA = 25 C, unless otherwise Temperature Rise vs Output Current (24 VOUT)Junction Temperature Rise vs Output Current (36 VOUT)OUTPUT CURRENT (A)0 TEMPERATURE ( C)8060204008054 G196214356 VIN12 VIN24 VINOUTPUT CURRENT (A)0 TEMPERATURE ( C)1008020406008054 G206214356 VIN12 VIN24 VIN35 VINOUTPUT CURRENT (A)0 TEMPERATURE ( C)1201008020406008054 G216214356 VIN12 VIN24 VIN36 VINOUTPUT CURRENT (A)

7 0 TEMPERATURE ( C)1201008020406008054 G226214356 VIN12 VIN24 VIN36 VINOUTPUT CURRENT (A)0 TEMPERATURE ( C)1008020406008054 G2342136 VIN12 VIN24 VIN36 VINTurn-On Response, Demo Board DC2016A, 3A Resistive LoadOutput Voltage Ripple, 12 VOUTS tock DC2016A Demo BoardCSS = FCSS = FCSS = F200 s/DIVVOUT5V/DIV8054 G2420 MHz BW LIMIT, MEASURED ACROSS C81 s/DIV6 VIN, LOAD100mV/DIV12 VIN, LOAD100mV/DIV24 VIN, LOAD100mV/DIV8054 G25 LTM805478054faFor more information FUNCTIONSGND (Bank 1, Pin L1): Tie these GND pins to a local ground plane below the LTM8054 and the circuit components. In most applications, the bulk of the heat flow out of the LTM8054 is through these pads, so the printed circuit design has a large impact on the thermal performance of the part. See the PCB Layout and Thermal Considerations sections for more details. Return the RFB1/RFB2 feedback divider to this (Bank 2): Power Output Pins. Apply output filter capacitors between these pins and GND pins.

8 VIN (Bank 3): Input Power. The VIN pin supplies current to the LTM8054 s internal power switches and to one terminal of the optional input current sense resistor. This pin must be locally bypassed with an external, low ESR capacitor; see Table 1 for recommended (Pin C1): Output Current Sense. Tie this pin to the output current sense resistor. The output average current sense threshold is 58mV, so the LTM8054 will regulate the output current to 58mV/RSENSE, where RSENSE is the value of the output current sense resistor in ohms. The load is powered through the sense resistor connected at this pin. Tie this pin to VOUT if no output current sense resistor is used. Keep this pin within of VOUT under all (Pin F1): Light Load Indicator. This open-drain pin indicates that the output current, as sensed through the resistor connected between VOUT and IOUT, is approximately equivalent to 6mV or less. Its state is meaningful only if a current sense resistor is applied between VOUT and IOUT.

9 This is useful to change the switching behavior of the LTM8054 in light loads. LL is typically tied to MODE or left open, but not connected to other loads or signal (Pins H7, H8): Controller Power Input. Apply a separate voltage above 5V if the LTM8054 is required to operate when the main power input (VIN) is below 5V. Bypass these pins with a high quality, low ESR capacitor. If a separate supply is not used, connect these pins to VIN. CLKOUT (Pin G1): Clock Output. Use this pin as a clock source when synchronizing other devices to the switching frequency of the LTM8054 . When this function is not used, leave this pin (Pin G2): Switching Mode Input. The LTM8054 oper-ates in forced continuous mode when MODE is open, and can operate in discontinuous switching mode when MODE is low. In discontinuous switching mode, the LTM8054 will block reverse inductor current. This pin is normally left open or tied to LL. This pin may be tied to GND for the purpose of blocking reverse current if no output current sense resistor is (Pin H1): Timing Resistor.

10 The RT pin is used to program the switching frequency of the LTM8054 by connecting a resistor from this pin to ground. The range of oscillation is 100kHz to 800kHz. The Applications Information section of the data sheet includes a table to determine the resistance value based on the desired switching frequency. Minimize capacitance at this pin. A resistor to ground must be ap-plied under all (Pin H2): External Synchronization Input. The SYNC pin has an internal pull-down resistor. See the Synchroni-zation section in Applications Information for details. Tie this pin to GND when not used. FB (Pin J1): Output Voltage Feedback. The LTM8054 regulates the FB pin to Connect the FB pin to a resis-tive divider between the output and GND to set the output voltage. The output voltage is determined by the equation VOUT= RTOPRBOT+1 where RTOP and RBOT are the top and bottom feedback resistors, respectively. See Table 1 for recommended FB divider resistor (Pin J2): Compensation Pin.