LTC3718 - LTC3718是Low Input Voltage, DC/DC Controller for DDR/QDR Memory Termination

LTC3718是LINEAR凌力尔特公司的一款DDR 存储器 / 总线终端产品，LTC3718是LTC3718是Low Input Voltage, DC/DC Controller for DDR/QDR Memory Termination，本站介绍了LTC3718的封装应用图解、特点和优点、功能等，并给出了与LTC3718相关的LINEAR元器件型号供参考。

LTC3718 - LTC3718是Low Input Voltage, DC/DC Controller for DDR/QDR Memory Termination - DDR 存储器 / 总线终端 - 电源管理 - 凌力尔特

LTC3718 - Low Input Voltage, DC/DC Controller for DDR/QDR Memory Termination

LTC3718 - Low Input Voltage, DC/DC Controller for DDR/QDR Memory Termination - Linear Technology（凌力尔特）

功能描述

The LTC3718 is a high current, high efficiency synchronous switching regulator controller for DDR and QDR™ memory termination. It operates from an input as low as 1.5V and provides a regulated output voltage equal to (0.5)VIN. The controller uses a valley current control architecture to enable high frequency operation with very low on-times without requiring a sense resistor. Operating frequency is selected by an external resistor and is compensated for variations in VIN and VOUT. The LTC3718 uses a pair of standard 5V logic level N-channel external MOSFETs, eliminating the need for expensive P-channel or low threshold devices.

Forced continuous operation reduces noise and RF interference. Fault protection is provided by internal foldback current limiting, an output overvoltage comparator and an optional short-circuit timer. Soft-start capability for supply sequencing can be accomplished using an external timing capacitor. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of loads and output capacitors.

OPTI-LOOP is a registered trademark of Linear Technology Corporation. No RSENSE is a trademark of Linear Technology Corporation. QDR RAMs and Quad Data Rate RAMs comprise a new family of products developed by Cypress Semiconductor, IDT and Micron Technology, Inc.

特点

Very Low VIN(MIN): 1.5V

Ultrafast Transient Response

True Current Mode Control

5V Drive for N-Channel MOSFETs Eliminates Auxillary 5V Supply

No Sense Resistor Required

Uses Standard 5V Logic-Level N-Channel MOSFETs

VOUT(MIN): 0.4V

VOUT Tracks 1/2 VIN or External VREF

Symmetrical Source and Sink Output Current Limit

Adjustable Switching Frequency

tON(MIN) <100ns