LT3758/LT3758A High Input Voltage, Boost, Flyback, SEPIC and Inverting Controller FEATURES DESCRIPTION n Wide Input Voltage Range: 5.5V to 100V The LT 3758/LT3758A are wide input range, current n Positive or Negative Output Voltage Programming mode, DC/DC controllers which are capable of generating with a Single Feedback Pin either positive or negative output voltages. They can be n Current Mode Control Provides Excellent Transient configured as either a boost, flyback, SEPIC or inverting Response converter. The LT3758/LT3758A drive a low side external n Programmable Operating Frequency (100kHz to N-channel power MOSFET from an internal regulated 7.2V 1MHz) with One External Resistor supply. The fixed frequency, current-mode architecture n Synchronizable to an External Clock results in stable operation over a wide range of supply n Low Shutdown Current < 1A and output voltages. n Internal 7.2V Low Dropout Voltage Regulator The operating frequency of LT3758/LT3758A can be set n Programmable Input Undervoltage Lockout with with an external resistor over a 100kHz to 1MHz range, Hysteresis and can be synchronized to an external clock using the n Programmable Soft-Start SYNC pin. A minimum operating supply voltage of 5.5V, n Small 10-Lead DFN (3mm 3mm) and and a low shutdown quiescent current of less than 1A, MSOPE Packages make the LT3758/LT3758A ideally suited for battery- n AEC-Q100 Qualification Is in Progress powered systems. The LT3758/LT3758A feature soft-start and frequency APPLICATIONS foldback functions to limit inductor current during start- n Automotive up and output short-circuit. The LT3758A has improved n Telecom load transient performance compared to the LT3758. n Industrial All registered trademarks and trademarks are the property of their respective owners. TYPICAL APPLICATION 12V Output Nonisolated Flyback Power Supply D1 V V IN OUT 36V TO 12V 0.022F C 72V IN 1.2A 6.2k 100V 2.2F 1M T1 4,5,6 100V 1,2,3 (PARALLEL) V IN X7R (SERIES) D SN SHDN/UVLO 44.2k SW 105k LT3758 SYNC GATE 1% M1 SENSE RT SS FBX 63.4k V GND INTV C CC 200kHz 1N4148 5.1 0.47F C VCC 10k C 15.8k OUT 100pF 4.7F 0.030 1% 47F 10V 10nF X5R X5R 3758 TA01 Rev G 1 Document Feedback For more information www.analog.comLT3758/LT3758A ABSOLUTE MAXIMUM RATINGS (Note 1) V , SHDN/UVLO (Note 7) ......................................100V Operating Junction Temperature Range (Notes 2, 8) IN INTV ....................................................V + 0.3V, 20V LT3758E/LT3758AE ........................... 40C to 125C CC IN GATE ........................................................ INTV + 0.3V LT3758I/LT3758AI ............................. 40C to 125C CC SYNC ..........................................................................8V LT3758H/LT3758AH .......................... 40C to 150C V , SS .........................................................................3V LT3758MP/LT3758AMP ..................... 55C to 150C C RT 1.5V Storage Temperature Range ............................................................................................... SENSE ....................................................................0.3V DFN .................................................... 65C to 125C FBX ................................................................. 6V to 6V MSOP ................................................ 65C to 150C Lead Temperature (Soldering, 10 sec) MSOP ........300C PIN CONFIGURATION TOP VIEW TOP VIEW V 1 10 V C IN V 1 10 V C IN FBX 2 9 SHDN/UVLO FBX 2 9 SHDN/UVLO 11 11 SS 3 8 INTV SS 3 8 INTV CC CC GND GND RT 4 7 GATE RT 4 7 GATE SYNC 5 6 SENSE SYNC 5 6 SENSE MSE PACKAGE 10-LEAD PLASTIC MSOP DD PACKAGE T = 150C, = 40C/W JMAX JA 10-LEAD (3mm 3mm) PLASTIC DFN EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB T = 125C, = 43C/W JMAX JA EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT3758EDD PBF LT3758EDD TRPBF LDNK 10-Lead (3mm 3mm) Plastic DFN 40C to 125C LT3758IDD PBF LT3758IDD TRPBF LDNK 10-Lead (3mm 3mm) Plastic DFN 40C to 125C LT3758EMSE PBF LT3758EMSE TRPBF LTDNM 10-Lead (3mm 3mm) Plastic MSOP 40C to 125C LT3758IMSE PBF LT3758IMSE TRPBF LTDNM 10-Lead (3mm 3mm) Plastic MSOP 40C to 125C LT3758HMSE PBF LT3758HMSE TRPBF LTDNM 10-Lead (3mm 3mm) Plastic MSOP 40C to 150C LT3758MPMSE PBF LT3758MPMSE TRPBF LTDNM 10-Lead (3mm 3mm) Plastic MSOP 55C to 150C LT3758AEDD PBF LT3758AEDD TRPBF LGGS 10-Lead (3mm 3mm) Plastic DFN 40C to 125C LT3758AIDD PBF LT3758AIDD TRPBF LGGS 10-Lead (3mm 3mm) Plastic DFN 40C to 125C LT3758AEMSE PBF LT3758AEMSE TRPBF LTGGK 10-Lead (3mm 3mm) Plastic MSOP 40C to 125C LT3758AIMSE PBF LT3758AIMSE TRPBF LTGGK 10-Lead (3mm 3mm) Plastic MSOP 40C to 125C LT3758AHMSE PBF LT3758AHMSE TRPBF LTGGK 10-Lead (3mm 3mm) Plastic MSOP 40C to 150C LT3758AMPMSE PBF LT3758AMPMSE TRPBF LTGGK 10-Lead (3mm 3mm) Plastic MSOP 55C to 150C Rev G 2 For more information www.analog.com