LTC3862-1 Multi-Phase Current Mode Step-Up DC/DC Controller Fea T Descrip T n Wide V Range: 8.5V to 36V Operation The LTC 3862-1 is a two phase constant frequency, current IN n 2-Phase Operation Reduces Input and Output mode boost and SEPIC controller that drives N-channel Capacitance power MOSFETs. Two phase operation reduces system n Fixed Frequency, Peak Current Mode Control filtering capacitance and inductance requirements. n 10V Gate Drive for High Voltage MOSFETs The operating frequency can be set with an external resistor n Adjustable Slope Compensation Gain over a 75kHz to 500kHz range and can be synchronized n Adjustable Max Duty Cycle (Up to 96%) to an external clock using the internal PLL. Multi-phase n Adjustable Leading Edge Blanking operation is possible using the SYNC input, the CLKOUT n 1% Internal Voltage Reference output and the PHASEMODE control pin allowing 2-, 3-, n Programmable Operating Frequency with One 4-, 6- or 12-phase operation. External Resistor (75kHz to 500kHz) n Other features include an internal 10V LDO with under- Phase-Lockable Fixed Frequency 50kHz to 650kHz n voltage lockout protection for the gate drivers, a preci- SYNC Input and CLKOUT for 2-, 3-, 4-, 6- or sion RUN pin threshold with programmable hysteresis, 12-Phase Operation (PHASEMODE Programmable) n soft-start and programmable leading edge blanking and Internal 10V LDO Regulator n maximum duty cycle. 24-Lead Narrow SSOP Package n 5mm 5mm QFN Package with 0.65mm Lead Pitch PART NUMBER INTV V ON V OFF CC IN IN n 24-Lead Thermally Enhanced TSSOP Package LTC3862 5V 3.3V 2.9V LTC3862-1 10V 7.5V 7.0V a T LTC3862-2 10V 4.4V 3.9V n L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Automotive, Telecom and Industrial Power Supplies Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 6144194, 6498466, 6611131. Typical a T V IN 8.5V TO 36V 22F 150k Efficiency vs Output Current 56H 56H 50V V OUT 100 72V V = 72V OUT 24.9k V IN 2A (MAX) 98 RUN GATE1 V = 32V + 96 IN INTV SENSE1 CC 110F 94 4.7F 0.020 V = 24V LTC3862-1 IN 100V 92 BLANK SENSE1 45.3k 90 FREQ GATE2 SYNC + 88 SENSE2 V = 9V IN PLLFLTR 86 0.1F 0.020 84 SS SENSE2 1nF 82 3V8 PGND CLKOUT 80 FB SLOPE 100 1000 10000 1.5nF D MAX LOAD CURRENT (mA) 38621 TA01b ITH PHASEMODE SGND 324k 5.62k 45.3k 100pF 38621 TA01a 38621fa For more information www.linear.com/LTC3862-1 1 EFFICIENCY (%) ion pplica ions pplica ion uresLTC3862-1 a Te Maxi Mu M r a T (Notes 1, 2) Input Supply Voltage (V ) ......................... 0.3V to 40V SS, PLLFLTR Voltage ................................ 0.3V to V IN 3V8 INTV Voltage .......................................... 0.3V to 11V ITH Voltage ............................................... 0.3V to 2.7V CC INTV LDO RMS Output Current .........................50mA FB Voltage ................................................. 0.3V to V CC 3V8 RUN Voltage ................................................ 0.3V to 8V FREQ Voltage ............................................ 0.3V to 1.5V SYNC Voltage ............................................... 0.3V to 6V Operating Junction Temperature Range (Notes 3, 4) SLOPE, PHASEMODE, D , LTC3862-1E ......................................... 40C to 85C MAX BLANK Voltage .......................................... 0.3V to V LTC3862-1I ........................................ 40C to 125C 3V8 + + SENSE1 , SENSE1 , SENSE2 , LTC3862-1H ....................................... 40C to 150C SENSE2 Voltage ...................................... 0.3V to V Storage Temperature Range ................... 65C to 150C 3V8 Reflow Peak Body Temperature ........................... 260C p in c F T TOP VIEW TOP VIEW TOP VIEW D 1 24 3V8 MAX D 1 24 3V8 MAX + SLOPE 2 23 SENSE1 + SLOPE 2 23 SENSE1 BLANK 3 22 SENSE1 24 23 22 21 20 19 BLANK 3 22 SENSE1 PHASEMODE 4 21 RUN BLANK 1 18 V IN PHASEMODE 4 21 RUN FREQ 5 20 V IN PHASEMODE 2 17 INTV CC FREQ 5 20 V IN SS 6 19 INTV FREQ 3 16 GATE1 CC SS 6 19 INTV CC 25 25 SS 4 15 PGND ITH 7 18 GATE1 ITH 7 18 GATE1 ITH 5 14 GATE2 FB 8 17 PGND FB 8 17 PGND FB 6 13 NC SGND 9 16 GATE2 SGND 9 16 GATE2 CLKOUT 10 15 NC 7 8 9 10 11 12 CLKOUT 10 15 NC SYNC 11 14 SENSE2 SYNC 11 14 SENSE2 + PLLFLTR 12 13 SENSE2 + PLLFLTR 12 13 SENSE2 UH PACKAGE FE PACKAGE GN PACKAGE 24-LEAD (5mm 5mm) PLASTIC QFN 24-LEAD PLASTIC TSSOP 24-LEAD NARROW PLASTIC SSOP T = 150C, = 44C/W JMAX JA T = 150C, = 38C/W JMAX JA T = 150C, = 85C/W JMAX JA EXPOSED PAD (PIN 25) IS PGND, MUST BE SOLDERED TO PCB EXPOSED PAD (PIN 25) IS PGND, MUST BE SOLDERED TO PCB Der in F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3862EFE-1 PBF LTC3862EFE-1 TRPBF LTC3862FE-1 24-Lead Plastic TSSOP 40C to 85C LTC3862IFE-1 PBF LTC3862IFE-1 TRPBF LTC3862FE-1 24-Lead Plastic TSSOP 40C to 125C LTC3862HFE-1 PBF LTC3862HFE-1 TRPBF LTC3862FE-1 24-Lead Plastic TSSOP 40C to 150C LTC3862EGN-1 PBF LTC3862EGN-1 TRPBF LTC3862GN-1 24-Lead Plastic SSOP 40C to 85C LTC3862IGN-1 PBF LTC3862IGN-1 TRPBF LTC3862GN-1 24-Lead Plastic SSOP 40C to 125C LTC3862HGN-1 PBF LTC3862HGN-1 TRPBF LTC3862GN-1 24-Lead Plastic SSOP 40C to 150C 38621fa 2 For more information www.linear.com/LTC3862-1 SGND SLOPE CLKOUT DMAX SYNC 3V8 + PLLFLTR SENSE1 + SENSE2 SENSE1 SENSE2 RUN ion or or ion igura on ings bsolu