POWER LOSS (W) LT8361 Low I Boost/SEPIC/Inverting Q Converter with 2A, 100V Switch FEATURES DESCRIPTION n Wide Input Voltage Range: 2.8V to 60V The LT 8361 is a current mode DC/DC converter with a n Ultralow Quiescent Current and Low Ripple 100V, 2A switch operating from a 2.8V to 60V input. With BurstMode Operation: I = 9A a unique single feedback pin architecture it is capable Q n 2A, 100V Power Switch of boost, SEPIC or inverting configurations. Burst Mode n Positive or Negative Output Voltage Programming operation consumes as low as 9A quiescent current to with a Single Feedback Pin maintain high efficiency at very low output currents, while n Programmable Frequency (300kHz to 2MHz) keeping typical output ripple below 15mV. n Synchronizable to an External Clock An external compensation pin allows optimization of loop n Spread Spectrum Frequency Modulation for Low EMI bandwidth over a wide range of input and output volt- n BIAS Pin for Higher Efficiency ages and programmable switching frequencies between n Programmable Undervoltage Lockout (UVLO) 300kHz and 2MHz. A SYNC/MODE pin allows synchroni- n Thermally Enhanced 16-lead MSOP packages zation to an external clock. It can also be used to select n AEC-Q100 Qualified for Automotive Applications between burst or pulse-skip modes of operation with or without Spread Spectrum Frequency Modulation for low APPLICATIONS EMI. For increased efficiency, a BIAS pin can accept a second input to supply the INTV regulator. Additional CC n Industrial and Automotive features include frequency foldback and programmable n Telecom soft-start to control inductor current during startup. n Medical Diagnostic Equipment n The LT8361 is available in a thermally enhanced 16-lead Portable Electronics MSOP package with four pins removed for high voltage All registered trademarks and trademarks are the property of their respective owners. pin spacings. TYPICAL APPLICATION 400kHz, 24V Output SEPIC Converter Efficiency and Power Loss 22H 1F V 100 2.50 V OUT IN 24V 4V TO 48V 90 2.25 200mA AT V = 5V IN 4.7F 22H 10F 450mA AT V = 12V IN 80 2.00 EFFICIENCY 550mA AT V = 24V V SW IN IN 600mA AT V = 48V 70 1.75 1M IN EN/UVLO 60 1.50 FBX LT8361 50 1.25 BIAS SYNC/MODE 40 1.00 INTV CC 30 0.75 RT SS GND V 71.5k C 1F POWER LOSS 20 0.50 16.2k 121k V = 12V IN 10 0.25 V = 48V IN 0.22F 0 0 6.8nF 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 LOAD CURRENT (A) 8361 TA01a 8361 TA01b D1: DIODES INC. DFLS2100 L1: WURTH ELEKTRONIK 744877220 C5: MURATA GRM32ER71H106KA12L Rev. A 1 Document Feedback For more information www.analog.com EFFICIENCY (%)LT8361 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW SW ..........................................................................100V EN/UVLO 1 16 SW1 VIN, EN/UVLO ...........................................................60V V 3 14 SW2 IN 17 BIAS ..........................................................................60V PGND, INTV 5 12 SYNC/MODE CC GND NC 6 11 SS EN/UVLO Pin Above V Pin, SYNC.............................6V IN BIAS 7 10 RT INTVCC ............................................................. (Note 2) V 8 9 FBX C MSE PACKAGE VC ...............................................................................4V VARIATION: MSE16 (12) FBX ...........................................................................4V 16-LEAD PLASTIC MSOP = 45C/W, = 10C/W JA JC Operating Junction Temperature (Note 3) EXPOSED PAD (PIN 17) IS PGND AND GND, MUST BE SOLDERED TO PCB LT8361E, LT8361I .............................. 40C to 125C LT8361H ............................................ 40C to 150C Storage Temperature Range .................. 65C to 150C ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT8361EMSE PBF LT8361EMSE TRPBF 8361 16-Lead Plastic MSOP with 4 Pins Removed 40C to 125C LT8361IMSE PBF LT8361IMSE TRPBF 8361 16-Lead Plastic MSOP with 4 Pins Removed 40C to 125C LT8361HMSE PBF LT8361HMSE TRPBF 8361 16-Lead Plastic MSOP with 4 Pins Removed 40C to 150C AUTOMOTIVE PRODUCTS** LT8361EMSE WPBF LT8361EMSE WTRPBF 8361 16-Lead Plastic MSOP with 4 Pins Removed 40C to 125C LT8361IMSE WPBF LT8361IMSE WTRPBF 8361 16-Lead Plastic MSOP with 4 Pins Removed 40C to 125C LT8361HMSE WPBF LT8361HMSE WTRPBF 8361 16-Lead Plastic MSOP with 4 Pins Removed 40C 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. **Versions of this part are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. These models are designated with a W suffix. Only the automotive grade products shown are available for use in automotive applications. Contact your local Analog Devices account representative for specific product ordering information and to obtain the specific Automotive Reliability reports for thesemodels. Rev. A 2 For more information www.analog.com