參數(shù)資料
型號： LTC3880IUJ#TRPBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 0.1 A DUAL SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQCC40
封裝： 6 X 6 MM, LEAD FREE, PLASTIC, WJJD-2, QFN-40
文件頁數(shù)： 1/112頁
文件大?。?/td> 2182K
代理商： LTC3880IUJ#TRPBF
LTC3880/LTC3880-1
1
3880fa
n
PMBus/I2C Compliant Serial Interface
– Telemetry Read Back includes VIN, IIN, VOUT, IOUT,
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 VIN Range: 4.5V to 24V
n
VOUT Range: 0.5V to 5.5V
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 LTC3880/LTC3880-1 are dual, PolyPhase DC/DC
synchronous step-down switching regulator controllers
with an I2C-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
canbeprogrammedusingexternalconfigurationresistors.
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.
FEATURES
APPLICATIONS
n
High Current Distributed Power Systems
n
Telecom, Datacom and Storage Systems
n
Intelligent Energy Efficient Power Regulation
VIN
TG0
0.1F
1F
10nF
6.04k
PMBus
INTERFACE
TO/FROM
OTHER LTC DEVICES
WRITE PROTECT
2200pF
FAULT MANAGEMENT
*SOME DETAILS OMITTED
FOR CLARITY
10F
1.74k
VOUT1
1.8V
20A
4.99k
10nF
530F
2.15k
0.2F
0.56H
1.0H
TG1
BG0
PGND
BG1
BOOST0
BOOST1
SW0
SW1
INTVCC
LTC3880*
TSNS0
TSNS1
ITHO
SHARE_CLK
WP
SGND
SDA
SCL
ALERT
RUN0
RUN1
GPIO0
GPIO1
VDD33
VDD25
ITH1
ISENSEO+ ISENSE1+
VSENSEO+ VSENSE1
VSENSEO–
ISENSEO– ISENSE1–
VOUT0
3.3V
15A
VIN
1F
3880 TA01a
+
530F
+
L
, LT, LTC, LTM, PolyPhase, Burst Mode, Module, Linear Technology and the Linear logo are
registered trademarks and No RSENSE 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.
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
VIN = 12V
VOUT = 1.8V
Efficiency and Power Loss
vs Load Current
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相關代理商/技術參數(shù)
參數(shù)描述
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