LTC3730 3-Phase, 5-Bit Intel Mobile VID, 600kHz, Synchronous Buck Controller

The LTC®3730 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 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 is optimized by using a choice of output Stage Shedding or Burst Mode technology.

An internal operational amplifier provides mode selectable output voltage programming in conjunction with the internal VID voltage control DAC.

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

产品特点 Features

3-Phase Current Mode Controller with Onboard MOSFET Drivers
±5% Output Current Match Optimizes Thermal Performance and Size of Inductors and MOSFETs
Operational Amplifier Accomodates Mode Switching
±1% VREF Accuracy Over Temperature
Reduced Input and Output Capacitance
Reduced Power Supply Induced Noise
VOUT Programmable from 0.6V to 1.75V (IMVP III)
±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
4V, VIN,Undervoltage RUN/SS Reset/Reattempt Circuit
Short-Circuit Shutdown Timer with Defeat Option
Overvoltage Soft Latch
Small 36-Lead Narrow (0.209”) SSOP Package

应用

Tablet Computers
High Performance Notebook Computers
High Output Current DC/DC Power Supplies

典型应用图

参数

LTC3730 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LTC3730CG	SSOP	36	C	$6.25	$4.35
LTC3730CG#PBF	SSOP	36	C	$6.25	$4.35
LTC3730CG#TR	SSOP	36	C		$4.45
LTC3730CG#TRPBF	SSOP	36	C		$4.45

LTC3730 数据手册及相关资料下载

数据手册(英文) : LTC3730 - 3-Phase, 5-Bit Intel Mobile VID, 600kHz, Synchronous Buck Controller.PDF
可靠性数据 : R384 Reliability Data .PDF