LTC1709-7

Features: · Output Stages Operate Antiphase Reducing Input Capacitance Requirements and Power Supply Induced Noise· Dual Input Supply Capability for Load Sharing· 5-Bit Mobile VID Code: VOUT = 0.925V to 2V· Current Mode Control Ensures Current Sharing· True Remote Sensing Differential Amplifier· P...

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SeekIC No. : 004401832 Detail

LTC1709-7: Features: · Output Stages Operate Antiphase Reducing Input Capacitance Requirements and Power Supply Induced Noise· Dual Input Supply Capability for Load Sharing· 5-Bit Mobile VID Code: VOUT = 0.925...

floor Price/Ceiling Price

Part Number:
LTC1709-7
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/3/27

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Product Details

Description



Features:

· Output Stages Operate Antiphase Reducing Input Capacitance Requirements and Power Supply Induced Noise
· Dual Input Supply Capability for Load Sharing
· 5-Bit Mobile VID Code: VOUT = 0.925V to 2V
· Current Mode Control Ensures Current Sharing
· True Remote Sensing Differential Amplifier
· Power Good Output Indicator
· OPTI-LOOPTM Compensation Minimizes COUT
· Three Operational Modes: PWM, Burst and Cycle Skip
· Programmable Fixed Frequency: 150kHz to 300kHz
· ±1% Output Voltage Accuracy
· Wide VIN Range: 4V to 36V Operation
· Adjustable Soft-Start Current Ramping
· Internal Current Foldback and Short-Circuit Shutdown
· Overvoltage Soft Latch Eliminates Nuisance Trips
· Active Voltage Positioning Capable
· Available in 36-Lead Narrow SSOP Package



Application

· Mobile/Desktop Computers
· Internet Servers
· Large Memory Arrays
· DC Power Distribution Systems



Pinout

  Connection Diagram


Specifications

Input Supply Voltage (VIN)...........................36V to 0.3V
Topside Driver Voltages (BOOST1,2) ...........42V to 0.3V
Switch Voltage (SW1, 2) ................................36V to 5 V
SENSE1+, SENSE2 +, SENSE1,
    SENSE2 Voltages ..................... (1.1)INTVCC to 0.3V
EAIN, VOS+, VOS, EXTVCC, INTVCC, RUN/SS,
   VBIAS, ATTENIN, ATTENOUT, PGOOD,
   VID0VID4, Voltages ..................................7V to 0.3V
Boosted Driver Voltage (BOOST-SW) ..............7V to 0.3V
PLLFLTR, PLLIN, VDIFFOUT,
   FCB Voltages ....................................... INTVCC to 0.3V
ITH Voltage ..................................................2.7V to 0.3V
Peak Output Current <1 s(TGL1,2, BG1,2) .................. 3A
INTVCC RMS Output Current ..................................... 50mA
Operating Ambient Temperature Range
   (Note 2) .................................................... 40 to 85
Junction Temperature (Note 3) .................................. 125
Storage Temperature Range ...................... 65 to 150
Lead Temperature (Soldering, 10 sec)........................ 300



Description

The LTC®1709-7 is a 2-phase, VID programmable, synchronous step-down switching regulator controller that drives two all N-channel external power MOSFET stages in a fixed frequency 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 response while operating each channel at an optimum frequency for efficiency. Thermal design is also simplified.

An operating mode select pin (FCB) of LTC1709-7 can be used to regulate a secondary winding or select among three modes including Burst ModeTM operation for highest efficiency. An internal differential amplifier provides true remote sensing of the regulated supply's positive and negative output terminals as required in high current applications.

The RUN/SS pin of LTC1709-7 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.




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