LTM4651 EN55022B Compliant 58V, 24W Inverting-Output DC/DC Module Regulator FEATURES DESCRIPTION n Complete Low EMI Switch Mode Power Supply The LTM 4651 is an ultralow noise, 58V, 24W DC/DC n EN55022 Class B Compliant Module inverting topology regulator. It regulates a nega- n Wide Input Voltage Range: 3.6V to 58V tive output voltage (V ) from a positive input supply OUT n Up to 4A Output Current voltage (V ), and is designed to meet the radiated emissions IN n 24W Output from 12V to 24V , P = 5W, requirements of EN55022. Conducted emission require- IN OUT LOSS T = 60C, t = 60C, 200LFM ments can be met by adding standard filter components. A RISE n Output Voltage Range: 26.5V V 0.5V Included in the package are the switching controller, power OUT n Safe Operating Area: V + V 58V MOSFETs, inductor, filters and support components. IN OUT n 1.67% Total DC Output Voltage Error Over Line, The LTM4651 can regulate V to a value between OUT Load and Temperature (40C to 125C) 0.5V and 26.5V, provided that its input and output n Parallel and Current Share with Multiple LTM4651s voltages adhere to the safe operating area criteria of the n Constant-Frequency Current Mode Control LTM4651: V + V 58V. A switching frequency IN OUT n Frequency Synchronization Range: 250kHz to 3MHz range of 250kHz to 3MHz is supported (400kHz default) n Power Good Indicator and Programmable Soft-Start and the module can synchronize to an external clock. n Overcurrent/Overvoltage/Overtemperature Protection n Despite being an inverting topology regulator, no level shift 15mm 9mm 5.01mm BGA Package circuitry is needed to interface to the LTM4651s RUN, PGOOD or CLKIN pins those pins are referenced to GND. APPLICATIONS The LTM4651 is offered in a 15mm 9mm 5.01mm BGA n Avionics, Industrial Control and Test Equipment package with SnPb or RoHS compliant terminal finish. n Video, Imaging and Instrumentation n All registered trademarks and trademarks are the property of their respective owners. 48V Telecom and Network Power Supplies n RF Systems TYPICAL APPLICATION 24V, 2.25A* Ultralow Noise** DC/DC Module Regulator Output Current Capability* 4.0 V IN V PGND IN 3.6V 3.5 4.7F TO 34V SV GND IN SNS 10F 3.0 LOAD V D 2 2.5 RUN SV OUT 4.7F 24V , INTV OUT CC V 2.0 OUT V = 0.5V LTM4651 OUT UP TO 2.25A V = 3.3V OUT VINREG 1.5 V = 5V OUT V = 8V COMPa OUT 1.0 V = 12V OUT COMPb V = 15V OUT PINS NOT USED IN 0.5 V = 20V OUT f SET V = 24V THIS CIRCUIT: OUT CLKIN, PGOOD, 0 GND ISETa ISETb 0 10 20 30 40 50 60 PGDFB, SW, EXTV CC 4651 TA01a + INPUT VOLTAGE (V) TEMP , TEMP , NC 90.9k 4651 TA01b 481k *Current limit frequency-foldback activates at load currents higher than indicated curves. Continuous output current capability subject to details of application **See Figures 5 8 for DC2328A Radiated Emission Performance against EN55022B limits. implementation. Switching frequency set per Table 1. See Notes 2 and 3. Rev. A 1 Document Feedback For more information www.analog.com OUTPUT CURRENT (A)LTM4651 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) (All Voltages Relative to V Unless Otherwise Indicated) OUT TOP VIEW Terminal Voltages 1 2 3 4 5 6 7 V V , V , SV , SW, PGND, GND , ISETa ..0.3V to 60V IN IN D IN SNS A GND, EXTV ........................................ 0.3V to 28V CC V CLKIN NC D B RUN .................................GND 0.3V to V + 60V OUT V OUT V SV INTV , PGDFB, VINREG, COMPa .......... 0.3V to 4V NC OUT IN CC C f ..................................................0.3V to INTV SET CC PGOOD PGDFB VINREG GND COMPb ................................................... 0.3V to 5V D COMPb COMPa f NC ISETb .................................................... 0.3V to 28V SET SV OUT E CLKIN, PGOOD (Relative to GND) ........... 0.3V to 6V ISETb ISETa EXTV RUN CC Terminal Currents F INTV Peak Output Current (Note 8) ................30mA INTV CC CC G + TEMP ..................................................1mA to 10mA GND SV SNS OUT SW TEMP .................................................10mA to 1mA H + + TEMP TEMP Temperatures TEMP TEMP J Internal Operating Temperature V OUT K Range (Notes 2, 7).......................... 40C to 125C NC PGND Storage Temperature Range .............. 55C to 125C L Peak Solder Reflow Package BGA PACKAGE Body Temperature ............................................ 245C 77-PIN (15mm 9mm 5.01mm) T = 125C JMAX = 22.4C/W, = 7.9C/W, = 9.6C/W, = 20.8C/W JCtop JCbottom JB JA VALUES DETERMINED PER JESD51-12 WEIGHT = 1.8 GRAMS ORDER INFORMATION PART MARKING* PACKAGE MSL TEMPERATURE RANGE PART NUMBER PAD OR BALL FINISH DEVICE FINISH CODE TYPE RATING (SEE NOTE 2) LTM4651EY PBF 40C to 125C SAC305 (RoHS) e1 LTM4651IY PBF LTM4651Y BGA 3 40C to 125C LTM4651IY SnPb (63/37) e0 40C to 125C Contact the factory for parts specified with wider operating temperature Recommended LGA and BGA PCB Assembly and Manufacturing ranges. *Pad or ball finish code is per IPC/JEDEC J-STD-609. Procedures LGA and BGA Package and Tray Drawings Rev. A 2 For more information www.analog.com