LT8606/LT8606B 42V, 350mA Synchronous Step-Down Regulator with 2.5A Quiescent Current FEATURES DESCRIPTION n Wide Input Voltage Range: 3.0V to 42V The LT 8606 is a compact, high efficiency, high speed n Ultralow Quiescent Current Burst Mode Operation: synchronous monolithic step-down switching regulator n that consumes only 1.7A of non-switching quiescent <3A I Regulating 12V to 3.3V Q IN OUT n current. The LT8606 can deliver 350mA of continuous Output Ripple <10mV P-P n current. Low ripple Burst Mode operation enables high High Efficiency 2MHz Synchronous Operation: n efficiency down to very low output currents while keeping >92% Efficiency at 0.35A, 12V to 5V IN OUT n the output ripple below 10mV . Internal compensation 350mA Maximum Continuous Output P-P n with peak current mode topology allows the use of small Fast Minimum Switch-On Time: 35ns n inductors and results in fast transient response and good Adjustable and Synchronizable: 200kHz to 2.2MHz n loop stability. The EN/UV pin has an accurate 1V threshold Spread Spectrum Frequency Modulation for Low EMI n and can be used to program V undervoltage lockout or Allows Use of Small Inductors IN n to shut down the LT8606. The PG pin signals when V Low Dropout OUT is within 8.5% of the programmed output voltage as well n Peak Current Mode Operation as fault conditions. n Accurate 1V Enable Pin Threshold n Internal Compensation The MSOP package includes a SYNC pin to synchronize n Output Soft-Start and Tracking to an external clock, or to select Burst Mode operation n Small Thermally Enhanced 10-Lead MSOP Package or pulse-skipping with or without spread-spectrum the or 8-Pin 2mm 2mm DFN Package TR/SS pin programs soft-start or tracking. The DFN pack- n AEC-Q100 Qualified for Automotive Applications age omits these pins and can be purchased in pulse-skip- ping or Burst Mode operation variety. APPLICATIONS PACKAGE SYNC FUNCTIONALITY n General Purpose Step-Down Converter LT8606MSE MSE Programmable n Low EMI Step Down LT8606DFN DFN Burst Mode Operation All registered trademarks and trademarks are the property of their respective owners. LT8606BDFN DFN Pulse-Skipping Mode TYPICAL APPLICATION 12V to 5V Efficiency IN OUT 100 5V, 2MHz Step-Down L = 10H 95 f = 2MHz SW V IN V BST IN 90 5.5V TO 42V L1 C2 C1 EN/UV 10H V 1F 0.1F OUT 85 SYNC SW 5V R4 350mA 80 100k LT8606 75 INTV PG POWER GOOD CC C3 C5 70 1F 10pF TR/SS 65 C6 10nF 60 C4 RT GND FB R2 10F R1 R3 1M 55 X7R 18.2k 187k 0805 50 0 50 100 150 200 250 300 350 8606 TA01a f = 2MHz SW I (mA) OUT 8606 TA01b L1 = XFL3010-103ME Rev. D 1 Document Feedback For more information www.analog.com EFFICIENCY (%)LT8606/LT8606B ABSOLUTE MAXIMUM RATINGS (Note 1) V , EN/UV, PG ..........................................................42V Operating Junction Temperature Range (Note 2) IN FB, TR/SS ................................................................4V LT8606E ............................................ 40C to 125C SYNC Voltage ...........................................................6V LT8606I ............................................. 40C to 125C LT8606J ............................................ 40C to 150C LT8606H ............................................ 40C to 150C Storage Temperature Range .................. 65C to 150C PIN CONFIGURATION TOP VIEW TOP VIEW BST 1 8 EN/UV BST 1 10 EN/UV SW 2 9 V IN SW 2 7 V IN 11 9 INTV 3 8 PG CC GND GND INTV 3 6 PG RT 4 7 TR/SS CC SYNC 5 6 FB RT 4 5 FB MSE PACKAGE 10-LEAD PLASTIC MSOP DC PACKAGE 8-LEAD (2mm 2mm) PLASTIC DFN = 40C/W JA 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 LT8606EMSE PBF LT8606EMSE TRPBF LTGXT 10-Lead Plastic MSOP 40C to 125C LT8606IMSE PBF LT8606IMSE TRPBF LTGXT 10-Lead Plastic MSOP 40C to 125C LT8606HMSE PBF LT8606HMSE TRPBF LTGXT 10-Lead Plastic MSOP 40C to 150C LT8606EDC TRMPBF LT8606EDC TRPBF LGXV 8-Lead Plastic 2mm 2mm DFN 40C to 125C LT8606IDC TRMPBF LT8606IDC TRPBF LGXV 8-Lead Plastic 2mm 2mm DFN 40C to 125C LT8606HDC TRMPBF LT8606HDC TRPBF LGXV 8-Lead Plastic 2mm 2mm DFN 40C to 150C LT8606BEDC TRMPBF LT8606BEDC TRPBF LGXW 8-Lead Plastic 2mm 2mm DFN 40C to 125C LT8606BIDC TRMPBF LT8606BIDC TRPBF LGXW 8-Lead Plastic 2mm 2mm DFN 40C to 125C LT8606BHDC TRMPBF LT8606BHDC TRPBF LGXW 8-Lead Plastic 2mm 2mm DFN 40C to 150C AUTOMOTIVE PRODUCTS** LT8606EMSE WPBF LT8606EMSE WTRPBF LTGXT 10-Lead Plastic MSOP 40C to 125C LT8606IMSE WPBF LT8606IMSE WTRPBF LTGXT 10-Lead Plastic MSOP 40C to 125C LT8606JMSE WPBF LT8606JMSE WTRPBF LTGXT 10-Lead Plastic MSOP 40C to 150C LT8606HMSE WPBF LT8606HMSE WTRPBF LTGXT 10-Lead Plastic MSOP 40C to 150C LT8606EDC WTRMPBF LT8606EDC WTRPBF LGXV 8-Lead Plastic 2mm 2mm DFN 40C to 125C LT8606IDC WTRMPBF LT8606IDC WTRPBF LGXV 8-Lead Plastic 2mm 2mm DFN 40C to 125C LT8606JDC WTRMPBF LT8606JDC WTRPBF LGXV 8-Lead Plastic 2mm 2mm DFN 40C to 150C LT8606HDC WTRMPBF LT8606HDC WTRPBF LGXV 8-Lead Plastic 2mm 2mm DFN 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. D 2 For more information www.analog.com