POWER LOSS (W) LTC3863 60V Low I Inverting Q DC/DC Controller FEATURES DESCRIPTION n Wide Operating V Range: 3.5V to 60V The LTC 3863 is a robust, inverting DC/DC PMOS control- IN n Wide Negative V Range: 0.4V to Beyond 150V ler optimized for automotive and industrial applications. It OUT n Low Operating I = 70A Q drives a P-channel power MOSFET to generate a negative n Strong High Voltage MOSFET Gate Driver output and requires just a single inductor to complete the n Constant Frequency Current Mode Architecture circuit. Output voltages from 0.4V to 150V are typically n Verified FMEA for Adjacent Pin Open/Short achievable with higher voltages possible, only limited by n Selectable High Efficiency Burst Mode Operation or external components. Pulse-Skipping Mode at Light Loads The LTC3863 offers excellent light load efficiency, draw- n Programmable Fixed Frequency: 50kHz to 850kHz n ing only 70A quiescent current in a user programmable Phase-Lockable Frequency: 75kHz to 750kHz n Burst Mode operation. Its peak current mode, constant Accurate Current Limit n frequency PWM architecture provides for good control of Programmable Soft-Start or Voltage Tracking n switching frequency and output current limit. The switch- Internal Soft-Start Guarantees Smooth Start-Up n Low Shutdown I = 7A ing frequency can be programmed from 50kHz to 850kHz Q n Available in Small 12-Lead Thermally Enhanced with an external resistor and can be synchronized to an MSOP and DFN Packages external clock from 75kHz to 750kHz. The LTC3863 offers programmable soft-start or output tracking. Safety features include overvoltage, overcurrent APPLICATIONS and short-circuit protection including frequency foldback. n Industrial and Automotive Power Supplies The LTC3863 is available in thermally enhanced 12-lead n Telecom Power Supplies MSOP and 3mm 4mm DFN packages. n Distributed Power Systems All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. patents, including 5731694. TYPICAL APPLICATION 4.5V to 16V Input, 5V/1.7A Output, 350kHz Inverting Converter Efficiency V IN 90 9 4.5V TO 16V + 10F V = 12V IN 0.47F 100F 25V 80 V = 5V 8 OUT 20V CAP 2 RUN V IN 70 7 350kHz 16m PLLIN/MODE EFFICIENCY 60 6 SENSE SS 50 5 27nF Si7129 GATE 14.7k V OUT 40 4 PULSE-SKIPPING MODE ITH 5V LTC3863 Burst Mode OPERATION 150F 33F 30 3 1.7A 61.9k B540C 16V 2 FREQ 10H 2 511k 20 2 SGND 10 1 POWER LOSS V FBN 80.6k 68pF 0 0 3863 TA01a V 0.002 0.02 0.2 2 FB PGND LOAD CURRENT (A) 3863 TA01b Rev. B 1 Document Feedback For more information www.analog.com EFFICIENCY (%) +LTC3863 ABSOLUTE MAXIMUM RATINGS (Note 1) Input Supply Voltage (V ) ......................... 0.3V to 65V Operating Junction Temperature Range (Notes 2, 3, 4) IN V -V Voltage ...................................... 0.3V to 6V LTC3863E,I ....................................... 40C to 125C IN SENSE V -V Voltage ........................................ 0.3V to 10V LTC3863H .......................................... 40C to 150C IN CAP RUN Voltage............................................... 0.3V to 65V LTC3863MP ....................................... 55C to 150C V , PLLIN/MODE Voltages ....................... 0.3V to 6V Storage Temperature Range .................. 65C to 150C FBN SS, ITH, FREQ, V Voltages ........................ 0.3V to 5V Lead Temperature (Soldering, 10 sec) FB MSOP Package .................................................300C PIN CONFIGURATION TOP VIEW TOP VIEW PLLIN/MODE 1 12 GATE PLLIN/MODE 1 12 GATE FREQ 2 11 V IN 2 FREQ 11 V IN SGND 3 10 SENSE 3 13 SGND 13 10 SENSE PGND SS 4 PGND 9 CAP SS 4 9 CAP V 5 8 RUN FB V 5 8 RUN FB ITH 6 7 V FBN ITH 6 7 V FBN MSE PACKAGE 12-LEAD PLASTIC MSOP DE PACKAGE T = 150C, = 40C/W, = 10C/W JMAX JA JC 12-LEAD (4mm 3mm) PLASTIC DFN EXPOSED PAD (PIN 13) IS PGND, MUST BE SOLDERED TO PCB T = 150C, = 43C/W, = 5.5C/W JMAX JA JC EXPOSED PAD (PIN 13) IS PGND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3863EMSE PBF LTC3863EMSE TRPBF 3863 12-Lead Plastic MSOP 40C to 125C LTC3863IMSE PBF LTC3863IMSE TRPBF 3863 12-Lead Plastic MSOP 40C to 125C LTC3863HMSE PBF LTC3863HMSE TRPBF 3863 12-Lead Plastic MSOP 40C to 150C LTC3863MPMSE PBF LTC3863MPMSE TRPBF 3863 12-Lead Plastic MSOP 55C to 150C LTC3863EDE PBF LTC3863EDE TRPBF 3863 12-Lead (4mm 3mm) Plastic DFN 40C to 125C LTC3863IDE PBF LTC3863IDE TRPBF 3863 12-Lead (4mm 3mm) Plastic DFN 40C to 125C LTC3863HDE PBF LTC3863HDE TRPBF 3863 12-Lead (4mm 3mm) Plastic DFN 40C to 150C LTC3863MPDE PBF LTC3863MPDE TRPBF 3863 12-Lead (4mm 3mm) Plastic DFN 55C to 150C Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with TRMPBF suffix. Rev. B 2 For more information www.analog.com