LTC3831
Info: : PRODUCTION
searchIcon
cartIcon

LTC3831

High Power Synchronous Switching Regulator Controller for DDR Memory Termination

Show More showmore-icon

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 4
1ku List Price Starting From $3.49
Features
  • High Power Switching Regulator Controller for DDR Memory Termination
  • VOUT Tracks 1/2 of VIN or External VREF
  • No Current Sense Resistor Required
  • Low Input Supply Voltage Range: 3V to 8V
  • Maximum Duty Cycle >91% Over Temperature
  • Drives All N-Channel External MOSFETs
  • High Efficiency: Over 95% Possible
  • Programmable Fixed Frequency Operation:
    • 100kHz to 500kHz
  • External Clock Synchronization Operation
  • Programmable Soft-Start
  • Low Shutdown Current: <10µA
  • Overtemperature Protection
  • Available in 16-Pin Narrow SSOP Package
Additional Details
show more Icon

The LTC3831 is a high power, high efficiency switching regulator controller designed for DDR memory termination. The LTC3831 generates an output voltage equal to 1/2 of an external supply or reference voltage. The LTC3831 uses a synchronous switching architecture with N-channel MOSFETs. Additionally, the chip senses output current through the drain-source resistance of the upper N-channel FET, providing an adjustable current limit without a current sense resistor.

The LTC3831 operates with input supply voltage as low as 3V and with a maximum duty cycle of >91%. It includes a fixed frequency PWM oscillator for low output ripple operation. The 200kHz free-running clock frequency can be externally adjusted or synchronized with an external signal from 100kHz to above 500kHz. In shutdown mode, the LTC3831 supply current drops to <10µA.


 Feedback Voltage
 Accuracy Over Temp
LTC3831 1.25V 1.5%
LTC3831-1 0.75V 1.6%

Applications

  • DDR SDRAM Termination
  • SSTL_2 Interface
  • SSTL_3 Interface
Part Models 4
1ku List Price Starting From $3.49

close icon
Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC3831EGN#PBF
  • HTML
  • HTML
LTC3831EGN#TRPBF
  • HTML
  • HTML
LTC3831IGN#PBF
  • HTML
  • HTML
LTC3831IGN#TRPBF
  • HTML
  • HTML

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Oct 11, 2022

- 22_0235

Epoxy Change from Henkel 8290 to 8290A for GN Package

LTC3831EGN#PBF

PRODUCTION

LTC3831EGN#TRPBF

PRODUCTION

LTC3831IGN#PBF

PRODUCTION

LTC3831IGN#TRPBF

PRODUCTION

Apr 6, 2022

- 22_0066

Laser Top Mark for 16QSOP Assembled in ADPG [PNG]

LTC3831EGN#PBF

PRODUCTION

LTC3831EGN#TRPBF

PRODUCTION

LTC3831IGN#PBF

PRODUCTION

LTC3831IGN#TRPBF

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Oct 11, 2022

- 22_0235

arrow down

Epoxy Change from Henkel 8290 to 8290A for GN Package

LTC3831EGN#PBF

PRODUCTION

LTC3831EGN#TRPBF

PRODUCTION

LTC3831IGN#PBF

PRODUCTION

LTC3831IGN#TRPBF

PRODUCTION

Apr 6, 2022

- 22_0066

arrow down

Laser Top Mark for 16QSOP Assembled in ADPG [PNG]

LTC3831EGN#PBF

PRODUCTION

LTC3831EGN#TRPBF

PRODUCTION

LTC3831IGN#PBF

PRODUCTION

LTC3831IGN#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

reference details image

DC470A

LTC3831EGN | High Efficiency Termination/Tracking Power Supply, 3V~8VIN, VREF/2 @ 12A

Tools & Simulations

Tools & Simulations 1

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Recently Viewed