LT8607/LT8607B 42V, 750mA Synchronous Step-Down Regulator with 2.5A Quiescent Current FEATURES DESCRIPTION n Wide Input Voltage Range: 3.0V to 42V The LT 8607 is a compact, high efficiency, high speed syn- n Ultralow Quiescent Current Burst Mode Operation chronous monolithic step-down switching regulator that n <3A I Regulating 12V to 3.3V consumes only 1.7A of non-switching quiescent current. Q IN OUT n The LT8607 can deliver 750mA of continuous current. Output Ripple <10mV P-P n Burst Mode operation enables high efficiency down to very High Efficiency 2MHz Synchronous Operation n low output currents while keeping the output ripple below >93% Efficiency at 0.5A, 12V to 5V IN OUT n 10mV . Internal compensation with peak current mode 750mA Maximum Continuous Output P-P n topology allows the use of small inductors and results in Fast Minimum Switch-On Time: 35ns n fast transient response and good loop stability. The EN/UV LT8607 Available in Fixed 5V Output n pin has an accurate 1V threshold and can be used to pro- Adjustable and Synchronizable: 200kHz to 2.2MHz n gram V undervoltage lockout or to shut down the LT8607 Spread Spectrum Frequency Modulation for Low EMI IN n reducing the input supply current to 1A. Allows Use of Small Inductors n Low Dropout The MSOP package includes a SYNC pin to synchronize n Peak Current Mode Operation to an external clock, or to select Burst Mode operation n Accurate 1V Enable Pin Threshold or pulse-skipping with or without spread spectrum the n Internal Compensation TR/SS pin programs soft-start or tracking. The DFN n Output Soft-Start and Tracking package omits these pins and can be purchased in pulse- n Small Thermally Enhanced 10-Lead MSOP Package skipping or Burst Mode operation. or 8-Lead 2mm 2mm DFN Package PART NUMBER PACKAGE OUTPUT VOLTAGE SYNC FUNCTIONALITY n AEC-Q100 Qualified for Automotive Applications LT8607MSE MSE Programmable Programmable LT8607-5MSE MSE Fixed 5V Out Programmable APPLICATIONS LT8607DFN DFN Programmable Burst Mode Operation LT8607BDFN DFN Programmable Pulse-Skipping Mode General Purpose Step-Down Converter Low EMI Step Down All registered trademarks and trademarks are the property of their respective owners. TYPICAL APPLICATION 12V to 5V Efficiency IN OUT 100 5V, 2MHz Step-Down 95 V IN V BST IN 5.7V TO 42V 90 EN/UV 0.1F 4.7F 4.7H V OUT 85 SYNC SW 5V 80 750mA LT8607 100k 75 POWER PG INTV CC GOOD 70 10pF 1F TR/SS 65 FB 60 RT 10nF 1M 22F L = 4.7H 55 GND 187k X7R 18.2k f = 2MHz SW 8607 TA01a 1206 50 0 125 250 375 500 625 750 f = 2MHz SW I (mA) OUT 8607 TA01b Rev. D 1 Document Feedback For more information www.analog.com EFFICIENCY (%)LT8607/LT8607B ABSOLUTE MAXIMUM RATINGS (Note 1) V , EN/UV, PG ..........................................................42V Operating Junction Temperature Range (Note 2) IN FB, TR/SS ................................................................4V LT8607E ............................................ 40C to 125C SYNC Voltage ...........................................................6V LT8607I ............................................. 40C to 125C LT8607J ............................................. 40C to 150C LT8607H ............................................ 40C to 150C Storage Temperature Range .................. 65C to 150C PIN CONFIGURATION LT8607 LT8607-5 LT8607/LT8607B TOP VIEW TOP VIEW TOP VIEW BST 1 8 EN/UV BST 1 10 EN/UV BST 1 10 EN/UV SW 2 9 V SW 2 9 V SW 2 7 V IN IN IN 11 11 9 INTV 3 8 PG INTV 3 8 PG CC CC GND GND GND INTV 3 6 PG CC RT 4 7 TR/SS RT 4 7 TR/SS SYNC 5 6 FB SYNC 5 6 V OUT RT 4 5 FB MSE PACKAGE MSE PACKAGE 10-LEAD PLASTIC MSOP 10-LEAD PLASTIC MSOP DC PACKAGE 8-LEAD (2mm 2mm) PLASTIC DFN = 40C/W = 40C/W JA JA EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB = 102C/W JA EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT8607EMSE PBF LT8607EMSE TRPBF LTGXJ 10-Lead Plastic MSOP 40C to 125C LT8607IMSE PBF LT8607IMSE TRPBF LTGXJ 10-Lead Plastic MSOP 40C to 125C LT8607HMSE PBF LT8607HMSE TRPBF LTGXJ 10-Lead Plastic MSOP 40C to 150C LT8607EMSE-5 PBF LT8607EMSE-5 TRPBF LTHNY 10-Lead Plastic MSOP 40C to 125C LT8607JMSE-5 PBF LT8607JMSE-5 TRPBF LTHNY 10-Lead Plastic MSOP 40C to 150C LT8607EDC TRMPBF LT8607EDC TRPBF LGXK 8-Lead Plastic (2mm 2mm) DFN 40C to 125C LT8607IDC TRMPBF LT8607IDC TRPBF LGXK 8-Lead Plastic (2mm 2mm) DFN 40C to 125C LT8607HDC TRMPBF LT8607HDC TRPBF LGXK 8-Lead Plastic (2mm 2mm) DFN 40C to 150C LT8607BEDC TRMPBF LT8607BEDC TRPBF LGXM 8-Lead Plastic (2mm 2mm) DFN 40C to 125C LT8607BIDC TRMPBF LT8607BIDC TRPBF LGXM 8-Lead Plastic (2mm 2mm) DFN 40C to 125C LT8607BHDC TRMPBF LT8607BHDC TRPBF LGXM 8-Lead Plastic (2mm 2mm) DFN 40C to 150C Rev. D 2 For more information www.analog.com