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LTC3719

Features: Output Stages Operate Antiphase Reducing Input and Output Capacitance Requirements and Power Supply Induced NoiseDual Input Supply Capability for Load Sharing5-Bit AMD CPU VID Code: VOUT = 0.8V to 1.55V±1% Output Voltage AccuracyTrue Remote Sensing Differential AmplifierPower Good Outpu...

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SeekIC No. : 004402313 Detail

LTC3719: Features: Output Stages Operate Antiphase Reducing Input and Output Capacitance Requirements and Power Supply Induced NoiseDual Input Supply Capability for Load Sharing5-Bit AMD CPU VID Code: VOUT ...

LTC3719 Data Sheet

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Part Number:
LTC3719
Supply Ability:
5000

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

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Product Details

Description



Features:

Output Stages Operate Antiphase Reducing Input
    and Output Capacitance Requirements and Power
    Supply Induced Noise
 Dual Input Supply Capability for Load Sharing
 5-Bit AMD CPU VID Code:
    VOUT = 0.8V to 1.55V
 ±1% Output Voltage Accuracy
 True Remote Sensing Differential Amplifier
 Power Good Output Voltage Monitor
 Supports Active Voltage Positioning
 Current Mode Control Ensures Current Sharing
 OPTI-LOOP®
    Compensation Minimizes COUT
 Three Operational Modes: PWM, Burst and Cycle Skip
Programmable Fixed Frequency: 150kHz to 300kHz
 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
 Available in 36-Lead Narrow (0.209) SSOP Package


Application

Servers and Workstations


Pinout

Connection Diagram


Specifications

(Note 1)
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, NO_CPU,
   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 <1µs(TG1, 2, BG1, 2) ............... 3A
INTVCC RMS Output Current ................................  50mA
Operating Ambient Temperature Range
   (Note 2) ............................................40°C to 85°C
Junction Temperature (Note 3) ........................... 125°C
Storage Temperature Range .............65°C to 150°C
Lead Temperature (Soldering, 10 sec) ................300°C


Description

The LTC® 3719 is a 2-phase, VID programmable, synchronous step-down switching regulator controller that drives two 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) can be used to select among three modes including Burst Mode®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 ap-
plications.

The RUN/SS pin of LTC3719 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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