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LTC3315B Datasheet(PDF) 1 Page - Analog Devices |
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LTC3315B Datasheet(HTML) 1 Page - Analog Devices |
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1 / 28 page  LTC3311S 1 Rev. A For more information www.analog.com Document Feedback TYPICAL APPLICATION FEATURES DESCRIPTION The LTC®3311S is a very small, low noise, monolithic step-down DC/DC converter capable of providing up to 12.5A of output current from a 2.25V to 5.5V input supply. The device employs Silent Switcher 2 architecture with internal hot loop bypass capacitors to achieve both low EMI and high efficiency at switching frequencies as high as 5MHz. For systems with higher power requirements, multi-phasing parallel converters is readily implemented. The LTC3311S uses a constant frequency, peak current mode control architecture for fast transient response. A 500mV reference allows for low voltage outputs. 100% duty cycle operation delivers low drop out. Other features include a power good signal when the output is in regulation, precision enable threshold, output overvoltage protection, thermal shutdown, a temperature monitor, clock synchronization, mode selection and output short circuit protection. The device is available in a compact 18-lead 3mm × 3mm LQFN package. 1.2V 12.5A Step-Down Converter Efficiency vs Load Current APPLICATIONS n Pin Compatible with LTC3310/LTC3310S and LTC3311 n Silent Switcher®2 Architecture: Ultralow EMI Emissions n High Efficiency—4.5mΩ NMOS & 16mΩ PMOS n Wide Bandwidth, Fast Transient Response n Safely Tolerates Inductor Saturation in Overload n VIN Range: 2.25V to 5.5V n VOUT Range: 0.5V to VIN n VOUT Accuracy: ±1% with Remote Sense n Peak Current Mode Control n Minimum On-Time: 35ns n Programmable Frequency to 5MHz n Shutdown Current: 1µA n Precision 400mV Enable Threshold, 1μA in Shutdown n Output Soft-Start with Voltage Tracking n Power Good Output n Die Temperature Monitor n Configurable for Paralleling Power Stages in Forced Continuous Mode n Thermally Enhanced 3mm × 3mm LQFN Package n AEC-Q100 Qualified for Automotive Applications n Automotive/Industrial/Communications n Servers, Telecom Power Supplies n Distributed DC Power Systems (POL) n FPGA, ASIC, µP Core Supplies All registered trademarks and trademarks are the property of their respective owners. 3311S TA01a 140k 47µF ×3 100k VOUT 1.2V 12.5A 6.8pF 274k 22µF 22µF 0.1µF SW FB AGND RT EN MODE/SYNC PGOOD SSTT ITH 15k 470pF VIN VIN 3.0V to 5.5V PGND LTC3311S 100nH fSW = 2MHz Wurth HCM5030 74435030010 EFFICIENCY POWER LOSS VIN = 3.3V VOUT = 1.2V fOSC = 2MHz (A) 0 1 3 4 5 7 8 9 10 12 13 0 10 20 30 40 50 60 70 80 90 100 0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0 Efficiency vs Load Current 3311S TA01b 5V, 12.5A Synchronous Step-Down Silent Switcher 2 in 3mm x 3mm LQFN |
Similar Part No. - LTC3315B |
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Similar Description - LTC3315B |
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