POWER LOSS (W) LT8619/LT8619-5 60V, 1.2A Synchronous Monolithic Buck Regulator with 6A Quiescent Current FEATURES DESCRIPTION n The LT 8619 is a compact, high efficiency, high speed Wide Input Voltage Range: 3V to 60V n synchronous monolithic step-down switching regulator Fast Minimum Switch-On Time: 30ns n that consumes only 6A of quiescent current. The LT8619 Ultralow Quiescent Current Burst Mode Operation: n can deliver 1.2A of continuous current. Top and bottom 6A I Regulating 12V to 3.3V Q IN OUT n power switches are included with all necessary circuitry 10mV Output Ripple at No Load P-P n to minimize the need for external components. Low ripple Synchronizable/Programmable Fixed Frequency Burst Mode operation enables high efficiency down to Forced Continuous Mode Operation: 300kHz very low output currents while keeping the output ripple to2.2MHz n to 10mV . A SYNC pin allows forced continuous mode High Efficiency Synchronous Operation: P-P n operation synchronized to an external clock. Internal com- 92% Efficiency at 0.5A, 5V from 12V OUT IN n pensation with peak current mode topology allows the use 90% Efficiency at 0.5A, 3.3V from 12V OUT IN n of small inductors and results in fast transient response Low Dropout: 360mV at 0.5A n and good loop stability. The EN/UV pin has an accurate 1V Low EMI n threshold and can be used to program V undervoltage Accurate 1V Enable Pin Threshold IN n lockout or to shut down the LT8619, reducing the input Internal Soft-Start and Compensation n supply current to below 0.6A. The PG flag signals when Power Good Flag n V is within 7.5% of the programmed output voltage. Small Thermally Enhanced 16-Lead MSOP Package OUT The LT8619 is available in a small 16-lead MSOP and and 10-Lead (3mm 3mm) DFN Packages n 10-lead 3mm 3mm DFN packages with exposed pad AEC-Q100 Qualified for Automotive Applications for low thermal resistance. APPLICATIONS All registered trademarks and trademarks are the property of their respective owners. n 12V Automotive Systems n 12V and 24V Commercial Vehicles n 48V Electric and Hybrid Vehicles n Industrial Supplies TYPICAL APPLICATION 5V, 1.2A Step-Down Converter Efficiency at V = 5V Efciency at V = 5VOUT OUT 100 10 f = 700kHz OSC V IN V BST IN 90 Burst Mode 6V TO 60V 2.2F 0.1F OPERATION LT8619-5 10H 80 1 V OUT SW 5V 70 EFFICIENCY 1.2A OFF ON EN/UV 100k 60 0.1 INTV PG PG 50 CC 1F BIAS POWER LOSS 40 0.01 RT OUT 30 SYNC GND V = 48V 66.5k 22F IN 0.001 20 8619 TA01a V = 24V IN V = 12V IN 10 f = 700kHz OSC L = 10H, IHLP-2020BZ-01 0 0.0001 L = VISHAY IHLP-2020BZ-01 0.001 0.01 0.1 1 10 100 1k 10k C = TDK C3225X7R1C226K250 OUT LOAD CURRENT (mA) 8619 TA01b Rev. C 1 Document Feedback For more information www.analog.com EFFICIENCY (%)LT8619/LT8619-5 ABSOLUTE MAXIMUM RATINGS (Notes 1, 2) V , EN/UV ................................................................60V Operating Junction Temperature (Note 3) IN BIAS ..........................................................................30V LT8619E, LT8619E-5 .......................... 40C to 125C BST Pin Above SW Pin................................................4V LT8619I, LT8619I-5 ............................ 40C to 125C PG, SYNC, OUT.........................................................6V Storage Temperature Range .................. 65C to 150C FB ...............................................................................2V PIN CONFIGURATION TOP VIEW TOP VIEW NC 1 16 SW V 1 10 SW IN V 2 15 SW IN NC 3 14 BST EN/UV 2 9 BST 11 EN/UV 4 17 13 NC RT 3 8 INTV CC GND RT 5 12 INTV GND CC PG 6 11 BIAS PG 4 7 BIAS SYNC 7 10 FB/OUT* SYNC 5 6 FB* GND 8 9 FB/OUT* MSE PACKAGE DD PACKAGE 16-LEAD PLASTIC MSOP 10-LEAD (3mm 3mm) PLASTIC DFN = 40C/W, = 10C/W JA JC = 43C/W, = 10C/W JA JC EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB *FB FOR LT8619, OUT FOR LT8619-5 ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT8619EDD PBF LT8619EDD TRPBF LGNP 10-Lead (3mm 3mm) Plastic DFN 40C to 125C LT8619IDD PBF LT8619IDD TRPBF LGNP 10-Lead (3mm 3mm) Plastic DFN 40C to 125C LT8619EMSE PBF LT8619EMSE TRPBF 8619 16-Lead Plastic MSOP 40C to 125C LT8619IMSE PBF LT8619IMSE TRPBF 8619 16-Lead Plastic MSOP 40C to 125C LT8619EMSE-5 PBF LT8619EMSE-5 TRPBF 86195 16-Lead Plastic MSOP 40C to 125C LT8619IMSE-5 PBF LT8619IMSE-5 TRPBF 86195 16-Lead Plastic MSOP 40C to 125C AUTOMOTIVE PRODUCTS** LT8619EMSE WPBF LT8619EMSE WTRPBF 8619 16-Lead Plastic MSOP 40C to 125C LT8619IMSE WPBF LT8619IMSE WTRPBF 8619 16-Lead Plastic MSOP 40C to 125C LT8619EMSE-5 WPBF LT8619EMSE-5 WTRPBF 86195 16-Lead Plastic MSOP 40C to 125C LT8619IMSE-5 WPBF LT8619IMSE-5 WTRPBF 86195 16-Lead Plastic MSOP 40C to 125C 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. C 2 For more information www.analog.com