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LTC3887IUJ-1

产品描述降压 稳压器 正 输出 降压 I²C,PMBus DC DC 切换控制器 IC 40-QFN(6x6)
产品类别半导体    多通道IC(PMIC)   
文件大小3MB,共116页
制造商ADI(亚德诺半导体)
官网地址https://www.analog.com
下载数据手册 下载用户手册 详细参数 全文预览

LTC3887IUJ-1概述

降压 稳压器 正 输出 降压 I²C,PMBus DC DC 切换控制器 IC 40-QFN(6x6)

LTC3887IUJ-1规格参数

参数名称属性值
类别
厂商名称ADI(亚德诺半导体)
系列PolyPhase®
包装管件
输出类型晶体管驱动器
功能降压
输出配置
拓扑降压
输出数2
输出阶段2
电压 - 供电 (Vcc/Vdd)4.5V ~ 24V
频率 - 开关250kHz ~ 1MHz
同步整流器
时钟同步
串行接口I²C,PMBus
控制特性使能,频率控制,相位控制
工作温度-40°C ~ 125°C(TJ)
安装类型表面贴装型
封装/外壳40-WFQFN 裸露焊盘
供应商器件封装40-QFN(6x6)
基本产品编号LTC3887-1

文档预览

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LTC3887/LTC3887-1/
LTC3887-2
Dual Output PolyPhase Step-Down DC/DC Controller
with Digital Power System Management
FEATURES
DESCRIPTION
n
n
n
n
n
n
n
n
n
n
n
n
n
PMBus/I
2
C Compliant Serial Interface
n
Telemetry Read Back includes V , I , V
IN IN OUT
, I
OUT
,
Temperature, Duty Cycle and Faults
n
Programmable Voltage, Current Limit, Digital
Soft-Start/Stop, Sequencing, Margining, OV/UV
and Frequency Synchronization (250kHz to 1MHz)
±0.5% Output Voltage Accuracy Over Temperature
Integrated 16-Bit ADC
V
OUT
Range: 0.5V to 5.5V (V
OUT0
, V
OUT1
)
Internal EEPROM and Fault Logging with ECC
Integrated N-Channel MOSFET Gate Drivers (LTC3887)
Minimum On-Time 45ns
Wide V
IN
Range: 4.5V to 24V
Analog Current Mode Control Loop
Remote Differential Sense for PolyPhase
®
Applications
Accurate PolyPhase Current Sharing for Up to Six Phases
Available in a 40-Pin (6mm
×
6mm) QFN Package
AEC-Q100 Qualified for Automotive Applications
High Current Distributed Power Systems
Telecom, Datacom and Storage Systems
Intelligent Energy Efficient Power Regulation
The
LTC
®
3887/LTC3887-1/LTC3887-2
are dual,
PolyPhase DC/DC synchronous step-down switching
regulator controllers with an I
2
C-based
PMBus compli-
ant serial interface.
The controllers use a constant fre-
quency, current mode architecture that is supported by
LTpowerPlay
®
a software development tool with graphical
user interface (GUI).
Switching frequency, channel phasing, output voltage,
and device address can be programmed using external
configuration resistors. Additionally, parameters can be
set via the digital interface or stored in EEPROM. Voltage,
current, internal/external temperature and fault status can
be read back through the bus interface.
The LTC3887 has integrated gate drivers. The LTC3887-1
has three-state PWM pins to drive DrMOS power stages.
The LTC3887-2 has gate drivers and no LDO and supports
V
IN
up to 34V. The LTC3887 is an enhanced version of
the LTC3880 with greater output voltage range and more
digital features. Refer to Operation section for more detail.
All registered trademarks and trademarks are the property of their respective owners. Protected
by U.S. Patents including 5481178, 5705919, 5929620, 6144194, 6177787, 6580258, 5408150,
7420359. Licensed under U.S. Patent 7000125 and other related patents worldwide.
APPLICATIONS
n
n
n
TYPICAL APPLICATION
Dual 350kHz 3.3V/0.5V Step-Down Converter
V
IN
6V TO 16V
10µF
V
IN
0.1µF
V
OUT0
0.5V
20A
0.56µH
1.58k
0.22µF
TG0
INTV
CC
TG1
0.1µF
1µH
2k
0.22µF
V
OUT1
3.3V
20A
1µF
0.5
0.4
0.3
V
OUT
ERROR (%)
0.2
0.1
0
–0.1
–0.2
–0.3
Regulated Output Voltage vs
Temperature, V
OUT
= 0.5V
LTC3887
BOOST0
SW0
BG0
I
SENSEO+
I
SENSEO–
V
SENSEO+
V
SENSEO–
TSNS0
10nF
2200pF
4.99k
BOOST1
SW1
BG1
I
SENSE1+
I
SENSE1–
V
SENSE1
TSNS1
2200pF
10nF
6.04k
530µF
+
+
530µF
–0.4
–0.5
–50 –30 –10 10 30 50 70
TEMPERATURE (°C)
90
110
I
THO
SDA
SCL
ALERT
RUN0
RUN1
I
TH1
GPIO0
GPIO1
V
DD33
V
DD25
*SOME DETAILS OMITTED
FOR CLARITY
PMBus
INTERFACE
FAULT MANAGEMENT
3887 TA01b
TO/FROM
OTHER LTC DEVICES
WRITE PROTECT
SHARE_CLK
SYNC
GND
WP
1µF
1µF
3887 TA01a
Document Feedback
For more information
www.analog.com
1
Rev. F

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