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LTC3731

Features: · 3-Phase Current Mode Controller with Onboard MOSFET Drivers· ±5% Output Current Matching Optimizes Thermal Performance and Size of Inductors and MOSFETs· Differential Amplifier Accurately Senses VOUT· ±1% VREF Accuracy Over Temperature· Reduced Power Supply Induced Noise· ±10% Power Go...

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SeekIC No. : 004402330 Detail

LTC3731: Features: · 3-Phase Current Mode Controller with Onboard MOSFET Drivers· ±5% Output Current Matching Optimizes Thermal Performance and Size of Inductors and MOSFETs· Differential Amplifier Accuratel...

LTC3731 Data Sheet

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Part Number:
LTC3731
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:

· 3-Phase Current Mode Controller with Onboard MOSFET Drivers
· ±5% Output Current Matching Optimizes Thermal Performance and Size of Inductors and MOSFETs
· Differential Amplifier Accurately Senses VOUT
· ±1% VREF Accuracy Over Temperature
· Reduced Power Supply Induced Noise
· ±10% Power Good Output Indicator
· 250kHz to 600kHz Per Phase, PLL, Fixed Frequency
· PWM, Stage SheddingTM or Burst Mode® Operation
· OPTI-LOOP® Compensation Minimizes COUT
· Adjustable Soft-Start Current Ramping
· Short-Circuit Shutdown Timer with Defeat Option
· Overvoltage Soft Latch
· Adjustable Undervoltage Lockout Threshold
· Selectable Phase Output for Up to 12-Phase Operation
· Available in 5mm × 5mm QFN and 36-Pin Narrow (0.209") SSOP Packages


Application

· Desktop Computers and Servers
· High Performance Notebook Computers
· High Output Current DC/DC Power Supplies


Pinout

Connection Diagram


Specifications

Topside Driver Voltages (BOOSTN) .............. 38V to 0.3V
Switch Voltage (SWN)..................................... 32V to 5V
Boosted Driver Voltage (BOOSTN SWN) .... 7V to 0.3V
Peak Output Current <1ms (TGN, BGN) ........................ 5A
Supply Voltages (VCC, VDR), PGOOD
Pin Voltage .................................................. 7V to 0.3V
RUN/SS, PLLFLTR, PLLIN, UVADJ,
FCB Voltages ............................................. VCC to 0.3V
ITH Voltage ............................................... 2.4V to 0.3V
Operating Ambient Temperature Range
LTC3731C ...................................................... 0 to 70
LTC3731I .................................................. 40 to 85
Junction Temperature (Note 2) .............................. 125
Storage Temperature Range ...................65 to 150
Lead Temperature G Package (Soldering, 10sec)... 300
Peak Body Temperature UH Package..................... 240


Description

The LTC®3731 is a PolyPhase® synchronous step-down switching regulator controller that drives all N-channel external power MOSFET stages in a phase-lockable fixed frequency architecture. The 3-phase controller drives its output stages with 120° phase separation at frequencies of up to 600kHz per phase to minimize the RMS current losses in both the input and output filter capacitors. The 3-phase technique effectively triples the fundamental frequency, improving transient response while operating each controller at an optimal frequency for efficiency and ease of thermal design. Light load efficiency of LTC3731 is optimized by using a choice of output Stage Shedding or Burst Mode operation.

A differential amplifier of LTC3731 provides true remote sensing of both the high and low side of the output voltage at the point of load. The precision reference supports output voltages from 0.6V to 6V.

Soft-start and a defeatable, timed short-circuit shutdown protect the MOSFETs and the load. Current foldback provides protection for the external MOSFETs under short-circuit or overload conditions.




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