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LTC3732 - LTC3732是3-Phase, 5-Bit VID, 600kHz, Synchronous Buck Switching Regulator Controller

LTC3732是LINEAR凌力尔特公司的一款数字可编程的降压型稳压器产品，LTC3732是LTC3732是3-Phase, 5-Bit VID, 600kHz, Synchronous Buck Switching Regulator Controller，本站介绍了LTC3732的封装应用图解、特点和优点、功能等，并给出了与LTC3732相关的LINEAR元器件型号供参考。

LTC3732 - LTC3732是3-Phase, 5-Bit VID, 600kHz, Synchronous Buck Switching Regulator Controller - 数字可编程的降压型稳压器 - 电源管理 - 凌力尔特

LTC3732 - 3-Phase, 5-Bit VID, 600kHz, Synchronous Buck Switching Regulator Controller

LTC3732 - 3-Phase, 5-Bit VID, 600kHz, Synchronous Buck Switching Regulator Controller - Linear Technology（凌力尔特）

功能描述

The LTC3732 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 high efficiency and ease of thermal design. Light load efficiency is optimized by using a choice of output Stage Shedding or Burst Mode technology.

A differential amplifier provides true remote sensing of both the high and low side of the output voltage at load points.

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

LTC and LT are registered trademarks of Linear Technology Corporation. Burst Mode, OPTI-LOOP and PolyPhase are registered trademarks of Linear Technology Corporation. Stage Shedding is a trademark of Linear Technology Corporation.

特点

3-Phase Controller with Onboard MOSFET Drivers

±5% Output Current Matching Optimizes Thermal Performance and Size of Inductors and MOSFETs

4.5V </= VCC </= 7V; 4.5V </= VIN </= 32V

Differential Amplifier Accurately Senses VOUT

Reduced Input and Output Capacitance

Reduced Power Supply Induced Noise

VID DAC Programmable from 1.1V to 1.85V (VRM9.0/9.1)

±10% Power Good Output Indicator

250kHz to 600kHz Per Phase, PLL, Fixed Frequency

PWM, Stage Shedding™ or Burst Mode Operation

OPTI-LOOP Compensation Minimizes COUT

Adjustable Soft-Start Current Ramping

Short-Circuit Shutdown Timer with Defeat Option

Overvoltage Soft Latch

Small 36-Lead Narrow (0.209 inch) SSOP Package

QFN 5mm x 7mm 38-Lead Package

应用

Desktop Computers

High Performance Notebook Computers

High Output Current DC/DC Power Supplies

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)
LTC3732CG	SSOP-36	C	$5.18	$4.35
LTC3732CG#PBF	SSOP-36	C	$5.18	$4.35
LTC3732CG#TR	SSOP-36	C		$4.45
LTC3732CG#TRPBF	SSOP-36	C		$4.45
LTC3732CUHF	5x7 QFN-38	C	$5.18	$4.35
LTC3732CUHF#PBF	5x7 QFN-38	C	$5.18	$4.35
LTC3732CUHF#TR	5x7 QFN-38	C		$4.45
LTC3732CUHF#TRPBF	5x7 QFN-38	C		$4.45

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