LTC1753是5-Bit Programmable Synchronous Switching Regulator Controller for Pentium? II Processor

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LTC1753 - LTC1753是5-Bit Programmable Synchronous Switching Regulator Controller for Pentium? II Processor

LTC1753是Linear公司的一款数字可编程的降压型稳压器产品，LTC1753是5-Bit Programmable Synchronous Switching Regulator Controller for Pentium? II Processor，本站介绍了LTC1753的封装应用图解、特点和优点、功能等，并给出了与LTC1753相关的凌力尔特元器件型号供参考。

LTC1753 - 5-Bit Programmable Synchronous Switching Regulator Controller for Pentium? II Processor

LTC1753 - 5-Bit Programmable Synchronous Switching Regulator Controller for Pentium? II Processor - Linear Technology（凌力尔特）

功能描述

The LTC1753 is a high power, high efficiency switching regulator controller optimized for 5V input to a digitally programmable 1.3V-3.5V output. The internal 5-bit DAC programs the output voltage from 1.3V to 2.05V in 50mV increments and from 2.1V to 3.5V in 100mV increments. The precision internal reference and an internal feedback system provide an output accuracy of ±1.5% at room temperature and typically ±2% over temperature, load current and line voltage shifts. The LTC1753 uses a synchronous switching architecture with two external N-channel output devices, providing high efficiency and eliminating the need for a high power, high cost P-channel device. Additionally, it senses the output current across the on-resistance of the upper N-channel FET, providing an adjustable current limit without an external low value sense resistor.

The LTC1753 free-runs at 300kHz and can be synchronized to a faster external clock if desired. It provides a phase lead compensation scheme and under harsh loading conditions, the PWM duty cycle can be momentarily forced to 0% or 100% to reduce the output voltage recovery time.

特点

5-Bit Digitally Programmable 1.3V to 3.5V Fixed Output Voltage, VRM 8.4 Compliant

Fast Transient Response: 0% to 100% Duty Cycle

Phase Lead Compensation for Remote Sensing

Overtemperature Protection

Flags for Power Good and Overvoltage Fault

19A Output Current Capability from a 5V Supply

Dual N-Channel MOSFET Synchronous Driver

Initial Output Accuracy: ±1.5%

Excellent Output Accuracy: ±2% Typ Over Line, Load and Temperature Variations

High Efficiency: Over 95% Possible

Adjustable Current Limit Without External Sense Resistors

Available in 2O-Lead SSOP and SW Packages

应用

Power Supply for Pentium® III, AMD-K6®-2, SPARC, ALPHA and PA-RISC Microprocessors

High Power 5V to 1.3V-3.5V Regulators

以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格（美元）

器件型号	封装	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量)
LTC1753CG	SSOP-20	C	$3.47	$3.05
LTC1753CG#PBF	SSOP-20	C	$3.47	$3.05
LTC1753CG#TR	SSOP-20	C		$3.15
LTC1753CG#TRPBF	SSOP-20	C		$3.15
LTC1753CSW	SW-20	C	$3.20	$2.80
LTC1753CSW#PBF	SW-20	C	$3.20	$2.80
LTC1753CSW#TR	SW-20	C		$2.90
LTC1753CSW#TRPBF	SW-20	C		$2.90