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器件3D模型￥ 57.424
LTC3880IUJ-1#TRPBF 数据手册 - Linear Technology（凌力尔特）
制造商:
Linear Technology（凌力尔特）
分类:
稳压芯片
封装:
QFN-40
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P13P14Hot
典型应用电路图在P1P38P53P109P110P111P112P113P116
原理图在P15P46
封装尺寸在P114
技术参数、封装参数在P9P17
应用领域在P1P18P31P32P38P39P40P41P42P43P44P45
电气规格在P5P6P7P8P9P10P11P12P13P17P45P52
导航目录
LTC3880IUJ-1#TRPBF数据手册
Page:
of 116 Go
若手册格式错乱，请下载阅览PDF原文件
LTC3880/LTC3880-1
1
3880fd
For more information www.linear.com/LTC3880
n
PMBus/I
2
C Compliant Serial Interface
n
Telemetry Read Back includes V
IN
, I
IN
, V
OUT
, I
OUT
,
Temperature and Faults
n
Programmable Voltage, Current Limit, Digital
Soft-Start/Stop, Sequencing, Margining, OV/UV
and Frequency Synchronization (250kHz to 1MHz)
n
±0.5% Output Voltage Accuracy Over Temperature
n
Integrated 16-Bit ADC
n
Internal EEPROM and Fault Logging
n
Integrated Powerful N-Channel MOSFET Gate Drivers
Power Conversion
n
Wide V
IN
Range: 4.5V to 24V
n
V
OUT
Range: 0.5V to 5.4V (4V on V
OUT0
)
n
Analog Current Mode Control Loop
n
Supports Power-Up Into Pre-Biased Load
n
Accurate PolyPhase
®
Current Sharing for Up to 6 Phases
n
Available in a 40-Pin (6mm × 6mm) QFN Package
TYPICAL APPLICATION
DESCRIPTION
Dual Output PolyPhase
Step-Down DC/DC Controller with
Digital Power System Management
The LTC
®
3880/LTC3880-1 are dual, PolyPhase DC/DC
synchronous step-down switching regulator controllers
with an I
2
C-based PMBus compliant serial interface.
The controllers use a constant frequency, current mode
architecture that is supported by LTpowerPlay™ software
development tool with graphical user interface (GUI).
Switching frequency, output voltage, and device address
can be programmed using external configuration resistors.
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 LTC3880 incorporates a 5V linear regulator while the
LTC3880-1 uses an external 5V supply for minimum power
loss. See comparison to LTC3887 below.
V
OUT
Start-Up Time
Max
V
OUT0/1
Fast ADC Mode
for 1 Parameter
LTC3887/LTC3887-1
70ms 5.5V/5.5V Yes
LTC3880/LTC3880-1
145ms 4V/5.4V No
FEATURES
APPLICATIONS
n
High Current Distributed Power Systems
n
Telecom, Datacom and Storage Systems
n
Intelligent Energy Efficient Power Regulation
V
IN
TG0
0.1µF
0.1µF
1µF
10nF
6.04k
PMBus
INTERFACE
TO/FROM
OTHER LTC DEVICES
WRITE PROTECT
2200pF
2200pF
FAULT MANAGEMENT
SOME DETAILS OMITTED
FOR CLARITY
10µF
1.74k
V
OUT1
1.8V
20A
4.99k
10nF
530µF
2.15k
0.2µF
0.2µF
0.56µH
1.0µH
TG1
BG0
PGND
BG1
BOOST0 BOOST1
SW0 SW1
INTV
CC
LTC3880
TSNS0 TSNS1
I
THO
SHARE_CLK
WP
SGND
SDA
SCL
ALERT
RUN0
RUN1
GPIO0
GPIO1
V
DD33
V
DD25
I
TH1
I
SENSEO
+
I
SENSE1
+
V
SENSEO
+
V
SENSE1
V
SENSEO
–
I
SENSEO
–
I
SENSE1
–
V
OUT0
3.3V
15A
V
IN
SYNC
1µF 1µF
3880 TA01a
+
530µF
+
L, LT, LT C , LT M, PolyPhase, Burst Mode, µModule, Linear Technology and the Linear logo are
registered trademarks and No R
SENSE
and LTpowerPlay are trademarks of Linear Technology
Corporation. All other 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.
LOAD CURRENT (A)
0.01
0
EFFICIENCY (%)
POWER LOSS (W)
10
30
40
50
100
70
0.1
1
3880 TA01b
20
80
90
60
0
2
6
1
4
5
3
10
100
V
IN
= 12V
V
OUT
= 1.8V
Efficiency and Power Loss
vs Load Current
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