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LTC3773 Datasheet(PDF) 1 Page - Linear Technology |
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LTC3773 Datasheet(HTML) 1 Page - Linear Technology |
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1 / 32 page  LTC3773 1 3773fb FEATURES DESCRIPTION Triple Output Synchronous 3-Phase DC/DC Controller with Up/Down Tracking The LTC®3773 is a high performance, 3-phase, triple output synchronous step-down switching regulator controller with output voltage power up/down tracking capability. The controller allows for sequential, coincident or ratio- metric tracking. This 3-phase controller drives its output stages with 120° phase separation at frequencies of up to 700kHz per phase minimizing the RMS input current. Light load efficiency can be maximized by using selectable Burst Mode operation. The 0.6V precision reference supports output voltages from 0.6V to 5V. Fault protection features include output overvoltage, input undervoltage lockout plus current foldback under short- circuit or overload conditions. ■ Servers, Telecom, Industrial Power Supplies ■ General Purpose Multiple Rail DC/DC ■ FPGA and DSP Requirements ■ Current Mode Controller with Onboard MOSFET Drivers ■ Programmable Power Up/Down Tracking ■ Wide VIN Range: 3.3V to 36V (VCC = 5V) ■ ±1% 0.6V VFB Accuracy Over Temperature ■ Power Good Output Voltage Monitor ■ Phase-Lockable or Adjustable Frequency: 160kHz to 700kHz ■ OPTI-LOOP® Compensation Minimizes COUT ■ Current Foldback and Overvoltage Protection ■ Selectable Continuous, Discontinuous or Burst Mode® Operation at Light Load ■ Programmable Phase Operation ■ Available in 5mm x 7mm QFN and 36-Lead SSOP Packages High Efficiency, 3-Phase, Triple Synchronous DC/DC Step-Down Controller , LT, LTC, LTM, Burst Mode and OPTI-LOOP are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 5408150, 5481178, 5705919, 5929620, 6144194, 6177787, 6304066, 6498466, 6580258, 6611131. + 0.003 Ω 20k 10k VOUT2 1.8V/15A VIN 4.5V TO 22V VCC 4.5V TO 6V CIN 1.5 μH 0.1 μF TG2 10k PGOOD POWER UP/SHUTDOWN SW2 BG2 TRACK1, 2, 3 TG1 SW1 BG1 SENSE1+ SENSE1– VFB1 ITH1, 2, 3 SDB1, 2, 3 SW1, 2, 3 BOOST1, 2, 3 SENSE2+ LTC3773 PLLFLTR SGND SENSE2– VFB2 VDR PGOOD VCC TG3 SW3 BG3 PGND SENSE3+ SENSE3– VFB3 COUT2 VIN 0.003 Ω 20k 20k VOUT3 1.2V/15A COUT3 10 μF 1.2 μH VIN 0.003 Ω 31.6k 10k VOUT1 2.5V/15A COUT1 2.2 μH 0.01 μF 3773 F01 TYPICAL APPLICATION APPLICATIONS |
Similar Part No. - LTC3773_15 |
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Similar Description - LTC3773_15 |
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