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LTC3882IUJ-1#TRPBF

Description
IC REG CTRLR BUCK PMBUS 40QFN
Categorysemiconductor    Power management   
File Size1MB,108 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
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LTC3882IUJ-1#TRPBF Overview

IC REG CTRLR BUCK PMBUS 40QFN

LTC3882IUJ-1#TRPBF Parametric

Parameter NameAttribute value
Output typePWM signal
Functionstep down
Output configurationjust
Topologystep down
Number of outputs2
output stage2
Voltage - Power Supply (Vcc/Vdd)3 V ~ 13.8 V
Frequency - Switch500kHz
Duty cycle (maximum)0.875
Synchronous rectifiernone
Clock synchronizationyes
serial interfaceI²C,PMBus
Control characteristicsEnable, frequency control, phase control, power good
Operating temperature-40°C ~ 125°C (TJ)
Package/casing40-WFQFN Exposed Pad
Supplier device packaging40-QFN(6x6)
FEATURES
n
LTC3882-1
Dual Output PolyPhase
Step-Down DC/DC Voltage Mode Controller
with Digital Power System Management
DESCRIPTION
The
LTC
®
3882-1
is a dual, PolyPhase DC/DC synchronous
step-down switching regulator controller with
PMBus
compliant serial interface.
It uses a constant frequency,
leading-edge modulation, voltage mode architecture for
excellent transient response and output regulation. Each
PWM channel can produce output voltages from 0.5V to
5.25V using a wide range of 3.3V compatible power stages,
including power blocks, DrMOS or discrete FET drivers.
Up to four LTC3882-1 devices can operate in parallel for
2-, 3-, 4-, 6- or 8-phase operation.
System configuration and monitoring is supported by the
LTpowerPlay™
software tool. The LTC3882-1 serial interface
can read back input voltage, output voltage and current,
temperature and fault status. Most operating parameters can
be set via the digital interface or stored in internal EEPROM
for use at power up. Switching frequency and phase, output
voltage and device address can also be set using external
configuration resistors.
All registered trademarks and trademarks are the property of their respective owners. Protected
by U.S. Patents, including 5396245, 5859606, 6144194, 6937178, 7420359 and 7000125.
n
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PMBus/I
2
C Compliant Serial Interface
– Monitor Voltage, Current, Temperature and Faults
– Program Voltage, Soft-Start/Stop, Sequencing,
Margining, AVP and UV/OV/OC Limits
3V ≤ VINSNS ≤ 38V, 0.5V ≤ V
OUT
≤ 5.25V
±0.5% Output Voltage Error
Programmable PWM Frequency or External Clock
Synchronization from 250kHz to 1.25MHz
Accurate PolyPhase
®
Current Sharing
Internal EEPROM with Fault Logging and ECC
IC Supply Range: 3V to 13.2V
Resistor or Inductor DCR Current Sensing
Power Good Output Voltage Monitor
Optional Resistor Programming for Key Parameters
40-Pin (6mm
×
6mm) QFN Package
APPLICATIONS
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High Current Distributed Power Systems
Servers, Network and Storage Equipment
Intelligent Energy Efficient Power Regulation
TYPICAL APPLICATION
LTC3882
V
IN
7V TO 13.2V
+
V
CC
VINSNS V
SENSE0
PWM ENABLE
TG/BG
HW WRITE
OUTPUT
CONTROL PROTECT
LTC3882-1
DEDICATED
PGOOD OUTPUT
DIFFERENTIAL
V
OUT
SENSE
V
OUT0
Only
V
OUT0
&
V
OUT1
FB0
SDA
TO/FROM
MCU
SCL
ALERT
RUN0
RUN1
PGOOD0
FAULT0
TO/FROM
EXTERNAL DEVICES
PGOOD1
FAULT1
SYNC
SHARE_CLK
I
AVG0
I
AVG1
I
AVG_GND
LTC3882-1
COMP0
COMP1
PWM0
TSNS0
I
SENSE0+
I
SENSE0–
V
SENSE1+
I
SENSE1–
I
SENSE1+
FDMF5820DC
PWM
V
IN
SW
V
OUT
1V
70A
Load Step Transient Current Sharing
(Using FDMF5820DC DrMOS)
I
OUT
10A/DIV
GND
FDMF5820DC
PWM
V
IN
SW
PWM1
I
L0
, I
L1
10A/DIV
50µs/DIV
38821 TA01b
TSNS1
V
SENSE0–
GND V
SENSE1
INDUCTORS: COOPER FP1007R1-R22
SOME DETAILS OMITTED FOR CLARITY
GND
38821 TA01a
Rev A
Document Feedback
For more information
www.analog.com
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Is it Rohs certified? - conform to conform to
Maker - Linear ( ADI ) Linear ( ADI )
Parts packaging code - QFN QFN
package instruction - QFN-40 QFN-40
Contacts - 40 40
Manufacturer packaging code - UJ UJ
Reach Compliance Code - compliant compliant
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