Datasheet > LTC3889

LTC3889

更新时间： 2024-11-06 02:51:39

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
110页	2463K
描述
Dual Loop 8-Phase Step-Down DC/DC Controller with Digital Power System Management

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LTC3889 数据手册

LTC3888-1

Dual Loop 8-Phase Step-Down DC/DC

Controller with Digital Power System Management

FEATURES

DESCRIPTION

The LTC^®3888-1 is a PMBus-compliant dual loop DC/DC

synchronous step-down switching regulator controller

with eight expandable phases supporting a wide range of

master/slave configurations. The controller uses constant

frequency current mode architecture to provide excellent

transient response and output regulation. Each PWM

master is capable of producing output voltages from 0.3V

to 3.45V with multiple phase configurations using DrMOS

devices that provide an output current monitor.

PMBus/I C Compliant Serial Interface

Monitor Voltage, Current, Temperature and Faults

Digitally Program V , Margins, UV, OV, Current

OUT

Limit, Soft-Start/Stop and Sequencing

Expandable to >16 Phases

External Resistor Divider Programs Output Voltage

4.5V ≤ V ≤ 26.5V, 0.3V ≤ V

≤ 3.45V

OUT

0.5ꢀ Output Voltage Accuracy

Programmable PWM Loop Compensation

Accurate PolyPhase^®Current Sharing

Internal EEPROM with ECC and Fault Logging

DrMOS Output Current Monitor Interface

DrMOS Temperature/Fault Bus Interface

DrMOS Gate Drive Supply Monitor

Output voltage is set with an external voltage divider.

PMBus configuration and monitoring is supported by

LTpowerPlay™ software. Programmable loop compen-

sation and built-in load step emulation facilitate setting

bandwidth based on input voltage and output load capaci-

tance. PMBus commands allow read back of input volt-

age, output voltage and current, and operating status.

Operating parameters can be set via PMBus command or

stored in internal EEPROM for use at power up. Switching

frequency, phase configuration, output current limit and

device address can also be set using external program-

ming resistors.

Load Step Emulation

Internal or External PWM Clock from 250kHz to 1MHz

52-Pin (5mm × 8mm) QFN Package

AEC-Q100 Qualified for Automotive Applications

APPLICATIONS

High Current Distributed Power Systems

Servers, Network and Storage Equipment

All registered trademarks and trademarks are the property of their respective owners. Protected

by U.S. Patents, including 7420359, 8786265, 8786268 and 8823352. Licensed under U.S.

Patent 7000125 and other related patents worldwide.

SPI

SET BY PMBus

OPTIONAL

OUT

TYPICAL APPLICATION

ADJUST ANALOG V

CONTROL COMPENSATION

OF V

ZERO

OUT

Dual 4-phase PSM Rails

ꢓ

ꢕꢓ ꢁꢖ ꢐꢗꢓ

ꢔꢍ

ꢘꢍꢖꢉꢔꢍꢑꢀꢙ

LTC3888

•

ꢐ.ꢐꢊꢋ

ꢗ.ꢧꢊꢋ

ꢆꢊꢋ

LTC3888-1

LTC3888-2

•

ꢓ

ꢔꢍ

ꢔꢍꢁꢓ

ꢂꢂ

ꢇꢖꢈꢛR ꢌꢁꢑꢎꢛ

ꢇꢈꢉ

ꢓ

ꢇꢈꢉ

ꢔꢉꢖꢍ

ꢇꢈꢉꢆ

ꢇꢈꢉ0

ꢌꢛꢍꢌꢛ0

ꢓ

ꢔꢍ

ꢖꢚꢁꢆ

ꢖꢚꢁ0

ꢔꢍ

0.ꢗꢓ ꢁꢖ

ꢃ.ꢗꢕꢓ

ꢌꢈ

ꢔ

ꢔꢉꢖꢍ

ꢔRꢛꢋ

ꢌꢈ

ꢌꢛꢍꢌꢛꢆ

ꢃ.ꢗꢕꢓ

ꢑꢁ ꢆꢐ0ꢑ

Efficiency vs Load Current

(8-Phase Using LTC7051)

ꢀꢁꢂꢃꢄꢄꢄꢅꢆ

Rꢛꢋ

ꢎꢍꢏ

ꢔRꢛꢋ

ꢎꢍꢏ

ꢑꢁ ꢆꢐ0ꢑ

ꢁꢛꢉꢇ

ꢁꢌꢍꢌ0

ꢁꢛꢉꢇ

ꢁꢌꢍꢌꢆ

ꢀ00

ꢀꢁ

ꢀ0

ꢀꢁ

ꢀ0

ꢀꢁ

ꢡ

ꢢ

ꢡ

ꢓ

ꢀꢁꢂ ꢃ ꢄꢅꢀ

ꢌꢛꢍꢌꢛꢆ

ꢌꢛꢍꢌꢛ0

ꢢ

ꢀꢁ ꢂ00ꢃꢄꢅ

ꢌꢛꢍꢌꢛ0

ꢏꢑꢖꢚꢁꢆ

ꢏꢑꢖꢚꢁ0

ꢓ

ꢋꢣ0

ꢓ

ꢋꢣꢆ

ꢌꢝꢍꢂ

ꢇꢎꢖꢖꢏ0

ꢇꢎꢖꢖꢏꢆ

FAULT0

FAULT1

Rꢚꢍ0

ꢇꢌꢉ

ꢌꢞꢑRꢛꢏ

ꢇꢔꢍꢌ

ꢌꢂꢀ

ꢌꢏꢑ

ꢇꢉꢣꢤꢥ

Rꢚꢍꢆ

ꢍꢖꢁꢛꢜ ꢌꢖꢉꢛ ꢏꢛꢁꢑꢔꢀꢌ ꢖꢉꢔꢁꢁꢛꢏ ꢋꢖR ꢂꢀꢑRꢔꢁꢝ

ꢖꢍꢀꢝ ꢁꢈꢖ ꢖꢋ ꢛꢔꢎꢞꢁ ꢂꢞꢑꢍꢍꢛꢀꢌ ꢌꢞꢖꢈꢍ

ꢌꢞꢑRꢛꢟꢂꢀꢠ ALERT

0.ꢀꢁ

ꢀ.0ꢁ

ꢀ.ꢁꢂ

ꢔ

ꢁꢞRꢆ

ꢁꢞꢆ

ꢁꢞR0

ꢁꢞ0

ꢐꢐ00ꢦꢋ

ꢔ

ꢐꢐ00ꢦꢋ

ꢆ00ꢦꢋ

ꢓ

ꢏꢏꢃꢃ

ꢏꢏꢐꢕ

ꢆꢊꢋ

ꢎꢍꢏ

ꢀ0

ꢀꢁ0

ꢀ00

ꢃꢄꢄꢄꢆꢐ ꢁꢑ0ꢆꢒ

ꢀꢁꢂꢃ ꢄꢅRRꢆꢇꢈ ꢉꢂꢊ

ꢀꢁꢁꢁꢂꢃ ꢄ0ꢃ

Rev. 0

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与LTC3889相关器件

型号	品牌	获取价格	描述	数据表
LTC3890	Linear Systems	获取价格	60V Low IQ, Dual, 2-Phase Synchronous Step-Down
LTC3890	Linear	获取价格	60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller
LTC3890	ADI	获取价格	60V 低 IQ双输出 2 相同步降压型 DC/DC 控制器
LTC3890_12	Linear Systems	获取价格	60V Low IQ, Dual, 2-Phase Synchronous Step-Down
LTC3890-1	Linear	获取价格	60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller
LTC3890-1	ADI	获取价格	60V、低 IQ、双通道、两相、同步降压型 DC/DC 控制器
LTC3890-2	Linear	获取价格	Triple Output, Buck/Buck/Boost Synchronous Co
LTC3890-2	ADI	获取价格	60V 低 IQ 双输出 2 相同步降压型 DC/DC 控制器
LTC3890-3	Linear	获取价格	60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller
LTC3890-3	ADI	获取价格	60V、低 IQ、双通道、两相、同步降压型 DC/DC 控制器

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