LTM8027 60V, 4A DC/DC Module Regulator FEATURES DESCRIPTION n Complete Switch Mode Power Supply The LTM 8027 is a complete 4A, DC/DC step-down power n Wide Input Voltage Range: 4.5V to 60V supply. Included in the package are the switching control- (7.5V Minimum Voltage to Start) ler, power switches, inductor and all support components. n Wide Output Voltage Range: 2.5V to 24V Operating over an input voltage range of 4.5V to 60V (7.5V (See Table 2) minimum voltage to start), the LTM8027 supports output n 4A Output Current voltages up to 24V, and a switching frequency range of n Programmable Soft-Start 100kHz to 500kHz, each set by a single resistor. Only n 9A Shutdown Supply Current the bulk input and output filter capacitors are needed to n Selectable Switching Frequency Current Mode finish the design. Control The low profile package (4.32mm) enables utilization of n Up to 95% Efficiency unused space on the bottom of PC boards for high den- n SnPb (BGA) or RoHS Compliant (LGA and BGA) sity point of load regulation. A built-in soft-start timer is Finish adjustable with a small capacitor. n Surface Mount LGA (15mm 15mm 4.32mm) The LTM8027 is packaged in a compact (15mm 15mm and (15mm 15mm 4.92mm) BGA Packages 4.32mm) over-molded land grid array (LGA) and (15mm 15mm 4.92mm) BGA package suitable for automated APPLICATIONS assembly by standard surface mount equipment. The LTM8027 is available with SnPb (BGA) or RoHS compli- n 12V and 42V Automotive and Heavy Equipment ant terminal finish. n 48V Telecom Power Supplies L, LT, LTC, LTM, Linear Technology, the Linear logo and Module are registered trademarks of n Avionics and Industrial Control Systems Linear Technology Corporation. All other trademarks are the property of their respective owners. n Distributed Power Converters TYPICAL APPLICATION 48W, 16V to 60V DC/DC Module Regulator Efficiency vs Load IN IN V 100 OUT V 24V IN IN 12V V V IN OUT 16V TO 60V 90 4.7F 4A 1M LTM8027 2 80 RUN BIAS1 70 SS BIAS2 22F 60 AUX SYNC 4 50 RT ADJ 40 GND 48.7k 56.2k 30 20 3845 TA01a 10 0 0 1 2 3 4 LOAD (A) 8027 TA01b 8027fd 1 For more information www.linear.com/LTM8027 EFFICIENCY (%)LTM8027 ABSOLUTE MAXIMUM RATINGS (Note 1) V Voltage ................................................................65V Current Out of AUX ............................................. 200mA IN BIAS1 ........................................................................15V Internal Operating Temperature (Note 3) BIAS2 ........................................................................24V E-, I-Grade ......................................... 40C to 125C SYNC, ADJ, R , RUN, SS Voltages ..............................5V MP-Grade .......................................... 55C to 125C T Current into RUN Pin (Note 2) ..................................1mA Peak Solder Reflow Body Temperature ................. 245C V , AUX .................................................................25V Storage Temperature Range .................. 55C to 125C OUT PIN CONFIGURATION TOP VIEW TOP VIEW 11 11 V V OUT OUT 10 10 BANK 1 BANK 1 9 9 8 8 AUX 7 GND AUX 7 GND BANK 2 BIAS1 BANK 2 6 BIAS1 6 SS 5 SS 5 RUN 4 RUN 4 BIAS2 3 BIAS2 3 V V IN IN ADJ 2 ADJ 2 BANK 3 BANK 3 1 1 A B C D E F G H J K L A B C D E F G H J K L RT SYNC RT SYNC LGA PACKAGE BGA PACKAGE 113-LEAD (15mm 15mm 4.32mm) 113-LEAD (15mm 15mm 4.92mm) T = 125C, = 12.2C/W, = 9.3C/W, T = 125C, = 12.2C/W, = 9.3C/W, JMAX JA JC(TOP) JMAX JA JC(TOP) = 3.6C/W, = 7.54C/W = 3.6C/W, = 7.54C/W JC(BOTTOM) JBOARD JC(BOTTOM) JBOARD VALUES DETERMINED PER JESD 51-9 VALUES DETERMINED PER JESD 51-9 WEIGHT = 2.6 GRAMS WEIGHT = 2.6 GRAMS ORDER INFORMATION