LTM8031 Ultralow Noise EMC 36V, 1A DC/DC Module Regulator Fea T Descrip T n Complete Step-Down Switch Mode Power Supply The LTM 8031 is an electromagnetic compatible (EMC) n Wide Input Voltage Range: 3.6V to 36V 36V, 1A DC/DC Module buck converter designed to n 1A Output Current meet the radiated emissions requirements of EN55022. n 0.8V to 10V Output Voltage Conducted emission requirements can be met by adding n Switching Frequency from 200kHz to 2.4MHz standard filter components. Included in the package are the n EN55022 Class B Compliant with Margin switching controller, power switches, inductor, filters and n Current Mode Control all support components. Operating over an input voltage n (e4) RoHS Compliant Package with Gold Pad Finish range of 3.6V to 36V, the LTM8031 supports an output n Programmable Soft-Start voltage range of 0.8V to 10V, and a switching frequency n Pin Compatible with the LTM8032 range of 200kHz to 2.4MHz, each set by a single resistor. n Low Profile (9mm 15mm 2.82mm) Only the bulk input and output filter capacitors are needed Surface Mount LGA Package to finish the design. The low profile package (2.82mm) enables utilization of unused space on the bottom of PC boards for high density point of load regulation. a T The LTM8031 is packaged in a thermally enhanced, compact n Automotive Battery Regulation (9mm 15mm) and low profile (2.82mm) overmolded land n Power for Portable Products grid array (LGA) package suitable for automated assembly n Distributed Supply Regulation by standard surface mount equipment. The LTM8031 is n Industrial Supplies RoHS compliant. n Wall Transformer Regulation L, LT, LTC, LTM, Module, Burst Mode, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical a T Ultralow Noise 5V/1A DC/DC Module Regulator LTM8031 EMI Performance V OUT V * IN V = 36V 5V IN V OUT IN 7VDC TO 36VDC 80 1A 10F FIN LTM8031 70 AUX RUN/SS 60 BIAS 1F 50 EN55022 SHARE PGOOD 40 CLASS B RT SYNC GND ADJ LIMIT 30 20 44.2k 47.5k 10 8031 TA01a 0 *RUNNING VOLTAGE RANGE. 10 SEE APPLICATIONS FOR START-UP DETAILS 0 100 200 300 400 500 600 700 800 900 1000 FREQUENCY (MHz) 8031 TA01b 8031fb 1 EMISSIONS LEVEL (dBV/m) ion pplica ions pplica ion uresLTM8031 a Te Maxi Mu M r a T p in c F T (Note 1) TOP VIEW V , FIN, RUN/SS Voltage ..........................................40V IN 1 2 3 4 5 6 7 ADJ, RT, SHARE Voltage .............................................5V V GND OUT A V , AUX .................................................................10V OUT Current from AUX ................................................100mA B BANK 1 PGOOD, SYNC ..........................................................30V C BIAS ..........................................................................25V D V + BIAS .................................................................56V E IN Maximum Junction Temperature (Note 2)............. 125C F BANK 2 Solder Temperature (Note 3) ................................. 245C G RT H SHARE J BIAS ADJ AUX K PGOOD BANK 3 L V FIN RUN/SS SYNC IN LGA PACKAGE 71-LEAD (9mm 15mm 2.82mm) T = 125C, = 20.7C/W, = 8.4C/W, JMAX JA JC(BOTTOM) = 25.6C/W, = 13.8C/W JC(TOP) JBOARD VALUES DETERMINED PER JESD 51-9 WEIGHT = 1.2g Der in F Ma T LEAD FREE FINISH TRAY PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTM8031EV PBF LTM8031EV PBF LTM8031V 40C to 125C 71-Lead (9mm 15mm 2.82mm) LGA LTM8031IV PBF LTM8031IV PBF LTM8031V 71-Lead (9mm 15mm 2.82mm) LGA 40C to 125C LTM8031MPV PBF LTM8031MPV PBF LTM8031V 71-Lead (9mm 15mm 2.82mm) LGA 55C to 125C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. For more information on lead free part marking, go to: