POWER LOSS (W) LTC3310S/LTC3310S-1 LTC3310/LTC3310-1 5V, 10A Synchronous Step-Down Silent Switcher 2 in 3mm 3mm LQFN FEATURES DESCRIPTION n Silent Switcher 2 Architecture: Ultralow EMI The LTC 3310S is a very small, low noise, monolithic Emissions (LTC3310S and LTC3310S-1) step-down DC/DC converter capable of providing up to n High Efficiency: 4.5m NMOS and 16m PMOS 10A of output current from a 2.25V to 5.5V input supply. n Wide Bandwidth, Fast Transient Response The device employs Silent Switcher 2 architecture with n Safely Tolerates Inductor Saturation in Overload internal hot loop bypass capacitors to achieve both low n V Range: 2.25V to 5.5V EMI and high efficiency at switching frequencies as high IN n V Range: 0.5V to V as 5MHz. For systems with higher power requirements, OUT IN n V Accuracy: 1% with Remote Sense multi-phasing parallel converters is readily implemented. OUT n Peak Current Mode Control The LTC3310S uses a constant-frequency, peak current n 35ns Minimum On-Time mode control architecture for fast transient response. A n Programmable Frequency to 5MHz 500mV reference allows for low voltage outputs. 100% n Shutdown Current: 1A duty cycle operation delivers low drop out. n Precision 400mV Enable Threshold n Other features include a power good signal when the out- Output Soft-Start with Voltage Tracking n put is in regulation, precision enable threshold, output Power Good Output n overvoltage protection, thermal shutdown, a temperature Die Temperature Monitor n monitor, clock synchronization, mode selection and out- Configurable for Paralleling Power Stages n put short circuit protection. Thermally-Enhanced 3mm 3mm LQFN Package n AEC-Q100 Qualified for Automotive Applications PART NUMBER Silent Switcher V OUT LTC3310S SS2 Adjustable APPLICATIONS LTC3310S-1 SS2 Fixed 1V n Automotive/Industrial/Communications LTC3310 SS1 Adjustable n Servers, Telecom Power Supplies LTC3310-1 SS1 Fixed 1V n Distributed DC Power Systems (POL) n FPGA, ASIC, P Core Supplies All registered trademarks and trademarks are the property of their respective owners. TYPICAL APPLICATION Efficiency vs Load Current 1.2V 10A Step-Down Converter 100 3.0 V IN 90 2.7 2.25V TO 5V EFFICIENCY 22F 22F 80 2.4 V IN 70 2.1 EN 100nH V OUT SW 1.2V 60 1.8 MODE/SYNC 10A 15pF 140k 50 1.5 22F LTC3310S FB PGOOD 3 40 1.2 100k SSTT 30 0.9 0.1F AGND ITH POWER LOSS 20 0.6 V = 3.3V RT IN PGND 10k V = 1.2V 274k OUT 3310S1 TA01a 10 0.3 f = 2MHz OSC 220pF 0 0 0 1 2 3 4 5 6 7 8 9 10 L = XEL4030-101ME, COILCRAFT LOAD CURRENT (A) 3310S1 TA01b Rev. F 1 Document Feedback For more information www.analog.com EFFICIENCY (%)LTC3310S/LTC3310S-1 LTC3310/LTC3310-1 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW V ............................................................. 0.3V to 6V IN EN, SSTT ............. 0.3V to Lesser of (V + 0.3V) or 6V IN MODE/SYNC ........ 0.3V to Lesser of (V + 0.3V) or 6V IN RT ........................ 0.3V to Lesser of (V + 0.3V) or 6V IN 18 17 16 15 FB or V ........... 0.3V to Lesser of (V + 0.3V) or 6V OUT IN EN 1 14 PGOOD PGOOD ......................................................... 0.3V to 6V AGND 2 13 MODE/SYNC I ......................................................................5mA PGOOD 19 V 3 12 V IN IN PGND Operating Junction Temperature Range (Notes 2, 3) V 4 11 V IN IN LTC3310SE/LTC3310SE-1 .................. 40C to 125C PGND 5 10 PGND LTC3310SI/LTC3310SI-1 .................... 40C to 125C 6 7 8 9 LTC3310J/LTC3310J-1 ....................... 40C to 150C LTC3310H/LTC3310H-1 ..................... 40C to 150C LQFN PACKAGE Storage Temperature.............................65C to +150C 18-LEAD (3mm 3mm) Maximum Reflow (Package Body) Temperature ...260C = 42C/W, = 9C/W, = 62C/W, = 14C/W JA JCbottom JCtop JB = 1.25C/W, VALUES DETERMINED PER JESD51-12 JT EXPOSED PAD (PIN 19) IS PGND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH AUTOMOTIVE PRODUCTS** PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3310S LTC3310SEV PBF LTC3310SEV WPBF LTC3310SIV PBF LTC3310SIV WPBF LTC3310SEV TRPBF LTC3310SEV WTRPBF 18-Lead (3mm 3mm) LQFN (Laminate LHCN 40C to 125C Package with QFN Footprint) LTC3310SIV TRPBF LTC3310SIV WTRPBF LTC3310SEV TRMPBF LTC3310SEV WTRMPBF LTC3310SIV TRMPBF LTC3310SIV WTRMPBF LTC3310S-1 LTC3310SEV-1 PBF LTC3310SEV-1 WPBF LTC3310SIV-1 PBF LTC3310SIV-1 WPBF LTC3310SEV-1 TRPBF LTC3310SEV-1 WTRPBF 18-Lead (3mm 3mm) LQFN (Laminate LHKG 40C to 125C Package with QFN Footprint) LTC3310SIV-1 TRPBF LTC3310SIV-1 WTRPBF LTC3310SEV-1 TRMPBF LTC3310SEV-1 WTRMPBF LTC3310SIV-1 TRMPBF LTC3310SIV-1 WTRMPBF Rev. F 2 For more information www.analog.com SW FB or V OUT SW ITH SW SSTT SW RT