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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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LTC3716 데이터시트(PDF) 1 Page - Linear Technology |
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LTC3716 데이터시트(HTML) 1 Page - Linear Technology |
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1 / 28 page  1 LTC3716 The LTC ®3716 is a 2-phase, VID programmable, synchro- nous step-down switching regulator controller that drives two N-channel external power MOSFET stages in a fixed fre- quency architecture. The 2-phase controller drives its two output stages out of phase at frequencies up to 300kHz to minimize the RMS ripple currents in both input and output capacitors. The 2-phase technique effectively multiplies the fundamental frequency by two, improving transient re- sponse while operating each channel at an optimum fre- quency for efficiency. Thermal design is also simplified. An operating mode select pin (FCB) can be used to regu- late a secondary winding or select among three modes including Burst Mode TM operation for highest efficiency. An internal differential amplifier provides true remote sensing of the regulated supply’s positive and negative output ter- minals as required in high current applications. The RUN/SS pin provides soft-start and optional timed, short-circuit shutdown. Current foldback limits MOSFET dissipation during short-circuit conditions when the overcurrent latchoff is disabled. OPTI-LOOP compensation allows the transient response to be optimized for a wide range of output capacitors and ESR values. 2-Phase, 5-Bit VID, Current Mode, High Efficiency, Synchronous Step-Down Switching Regulator , LTC and LT are registered trademarks of Linear Technology Corporation. OPTI-LOOP and Burst Mode are trademarks of Linear Technology Corporation. Figure 1. High Current Dual Phase Step-Down Converter s Mobile Computer CPU Supply s Output Stages Operate Antiphase Reducing Input and Output Capacitance Requirements and Power Supply Induced Noise s Dual Input Supply Capability for Load Sharing s 5-Bit Mobile VID Code: VOUT = 0.6V to 1.75V s ±1% Output Voltage Accuracy s True Remote Sensing Differential Amplifier s Power Good Output Voltage Monitor s Supports Active Voltage Positioning s Current Mode Control Ensures Current Sharing s OPTI-LOOP TM Compensation Minimizes COUT s Three Operational Modes: PWM, Burst and Cycle Skip s Programmable Fixed Frequency: 150kHz to 300kHz s Wide VIN Range: 4V to 36V Operation s Adjustable Soft-Start Current Ramping s Internal Current Foldback and Short-Circuit Shutdown s Overvoltage Soft Latch Eliminates Nuisance Trips s Available in 36-Lead Narrow SSOP Package 3716 F01 TG1 BOOST1 SW1 BG1 PGND SENSE1+ SENSE1– TG2 BOOST2 SW2 BG2 INTVCC SENSE2+ SENSE2– VIN RUN/SS FCB VDIFFOUT ITH ATTENIN ATTENOUT EAIN VID0–VID4 VOS – VOS + LTC3716 SGND PGOOD 0.1 µF 220pF 5 VID BITS S S 3.3k 10 µF 35V ×4 + COUT 1000 µF 4V ×2 VOUT 0.6V TO 1.75V 40A 1 µH 0.002 Ω 0.002 Ω VIN 5V TO 28V 1 µH 0.47 µF 0.47 µF D1 D2 10 µF 4 3 2 1 4 3 2 1 FEATURES DESCRIPTIO APPLICATIO S TYPICAL APPLICATIO |
유사한 부품 번호 - LTC3716_15 |
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유사한 설명 - LTC3716_15 |
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