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LTC7130 Datasheet(PDF) 1 Page - Linear Technology |
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LTC7130 Datasheet(HTML) 1 Page - Linear Technology |
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1 / 36 page  LTC7130 1 7130fb For more information www.linear.com/LTC7130 TYPICAL APPLICATION FEATURES DESCRIPTION The LTC®7130 is a current mode synchronous step-down monolithic converter that can deliver up to 20A continuous loadcurrent.Itemploysauniquearchitecturewhichenhances the signal-to-noise ratio of the current sense signal, allow- ing the use of a very low DC resistance power inductor to maximizeefficiencyinhighcurrentapplications.Thisfeature also reduces the switching jitter commonly found in low DCR applications. The LTC7130 also includes a high speed differentialremotesenseamplifierandaprogrammablecur- rent sense limit that can be selected from 10mV to 30mV to set the output current limit up to 20A. In addition, the DCR temperature compensation feature limits the maximum output current precisely over temperature. The LTC7130 also features a precise 0.6V reference with a guaranteedlimitof±0.5%thatprovidesanaccurateoutput voltage. A 5V to 20V input voltage range supports a wide variety of bus voltages and various types of batteries. TheLTC7130isofferedinacompactandlowprofileBGApack- age available with SnPb/RoHS compliant terminal finishes. APPLICATIONS n Wide VIN Range: 4.5V to 20V n Optimized for Low Duty Cycle Applications n High Efficiency: Up to 95% n LTC Proprietary Current Mode Architecture n High Current Parallel Operation n Ultralow DCR Current Sensing with Temperature Compensation n Programmable Output Current Limit n High Speed Differential Remote Sense Amplifier n ±0.5% Output Voltage Regulation Accuracy n Output Short-Circuit Protection with Soft Recovery n Programmable Soft-Start, Tracking n Programmable Fixed Frequency: 250kHz to 770kHz n EXTVCC for Reduced Power Dissipation n Fault Indicator for Output UV/OV Conditions n 6.25mm × 7.5mm × 2.22mm BGA Package n DSP, FPGA, ASIC Reference Designs n Telecom/Datacom Systems n Distributed High Power Density Systems L , LT, LTC, LTM, Burst Mode, OPTI-LOOP, μModule, Linear Technology and the Linear logo are registered trademarks and No RSENSE is a trademark of Analog Devices, Inc. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 5481178, 5705919, 5929620, 6177787, 6580258, 6498466, 6611131, patent pending. High Efficiency, 1.5V/20A Step-Down Converter with Very Low DCR Sensing Efficiency vs Load Current 20V 20A Monolithic Buck Converter with Ultralow DCR Sensing EFFICIENCY POWER LOSS VIN = 12V VOUT = 1.5V L = 0.25H (DCR = 0.37mΩ) EXTVCC = 5V CCM LOAD CURRENT (A) 0 2 4 6 8 10 12 14 16 18 20 0 10 20 30 40 50 60 70 80 90 100 0 2 4 6 8 10 12 14 7130 TA01b 20k CMDSH2-3 0.1µF 0.25µH (0.37m DCR) 3.09k 220nF 619Ω 4.7µF 1µF 2.2Ω 121k 470µF ×2 220pF 470µF 20k 30.1k 1nF INTVCC TK/SS ITH GND SVIN FREQ SNS– SNSA+ SNSD+ SW BOOST ILIM LTC7130 DIFFN DIFFP MODE/PLLIN DIFFOUT VFB VOUT 1.5V 20A ITEMP SGND RUN VIN VIN = 5V TO 20V PINS NOT USED IN THIS CIRCUIT: PGOOD CLKOUT EXTVCC 220nF + + 0.1µF INTVCC 3.01k 1k 2.2Ω 7130 TA01a |
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