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参数资料
型号： LTC3880EUJ#TRMPBF
厂商： Linear Technology
文件页数： 1/112页
文件大小： 0K
描述： IC REG CTRLR BUCK PWM CM 40-QFN
软件下载： LTpowerPlay™
标准包装： 500
系列： PolyPhase®
PWM 型： 电流模式
输出数： 2
频率 - 最大： 1MHz
电源电压： 4.5 V ~ 24 V
降压： 是
升压： 无
回扫： 无
反相： 无
倍增器： 无
除法器： 无
Cuk： 无
隔离： 无
工作温度： -40°C ~ 105°C
封装/外壳： 40-WFQFN 裸露焊盘
包装： 带卷 (TR)
LTC3880/LTC3880-1
FEATURES
Dual Output PolyPhase
Step-Down DC/DC Controller with
Digital Power System Management
DESCRIPTION
PMBus/I 2 C Compliant Serial Interface
High Current Distributed Power Systems
Telecom, Datacom and Storage Systems
Intelligent Energy Efficient Power Regulation
n
– Telemetry Read Back includes V IN , I IN , V OUT , I OUT ,
Temperature and Faults
– 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
APPLICATIONS
n
n
n
TYPICAL APPLICATION
V IN
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.
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 LTC3880/LTC3880-1 can be configured for Burst
Mode ? operation, discontinuous (pulse-skipping) mode
or continuous inductor current mode. The LTC3880 incor-
porates a 5V linear regulator while the LTC3880-1 uses an
external 5V supply for minimum power loss.
L , LT, LTC, LTM, 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.
V OUT0
2.15k
PMBus
INTERFACE
I SENSEO
I SENSE1
2200pF
V IN = 12V
V OUT = 1.8V
80
4
30
1
10μF
0.1μF
1.0μH
3.3V
15A
0.2μF
+
530μF
10nF
6.04k
*SOME DETAILS OMITTED
FOR CLARITY
TO/FROM
OTHER LTC DEVICES
WRITE PROTECT
2200pF
V IN INTV CC
TG0 TG1
LTC3880*
BOOST0 BOOST1
SW0 SW1
BG0 BG1
PGND
+ +
I SENSEO– I SENSE1–
V SENSEO+ V SENSE1
V SENSEO–
TSNS0 TSNS1
I THO I TH1
SDA GPIO0
SCL GPIO1
ALERT
RUN0 V DD33
RUN1 V DD25
SHARE_CLK
SGND
WP
1μF
0.1μF
0.56μH
1.74k
0.2μF
10nF
4.99k
FAULT MANAGEMENT
1μF 1μF
+
V OUT1
1.8V
20A
530μF
3880 TA01a
100 6
90
70
60
50 3
40
20
10
Efficiency and Power Loss
vs Load Current
5
2
0 0
0.01 0.1 1 10 100
LOAD CURRENT (A)
3880 TA01b
3880fb
For more information www.linear.com/LTC3880
1
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LTC3880IUJ#TRPBF 功能描述:IC REG CTRLR BUCK PWM CM 40-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX
LTC3880IUJ-1#PBF 功能描述:IC REG CTRLR BUCK PWM CM 40-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX
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