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LTC3887EUJ-2#TRPBF

Description
DC/DC Cntrlr Dual-OUT Step Down 1000kHz 40-Pin QFN EP T/R
CategoryPower/power management    The power supply circuit   
File Size2MB,116 Pages
ManufacturerADI
Websitehttps://www.analog.com
Environmental Compliance
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LTC3887EUJ-2#TRPBF Overview

DC/DC Cntrlr Dual-OUT Step Down 1000kHz 40-Pin QFN EP T/R

LTC3887EUJ-2#TRPBF Parametric

Parameter NameAttribute value
Brand NameAnalog Devices Inc
Is it lead-free?Contains lead
Is it Rohs certified?conform to
MakerADI
package instructionHVQCCN, LCC40,.24SQ,20
Contacts40
Manufacturer packaging code05-08-1728
Reach Compliance Codecompliant
Other featuresSEATED HT-CALCULATED
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage34 V
Minimum input voltage4.5 V
Nominal input voltage12 V
JESD-30 codeS-PQCC-N40
length6 mm
Number of functions2
Number of terminals40
Maximum operating temperature125 °C
Minimum operating temperature-40 °C
Maximum output voltage5.5 V
Minimum output voltage0.5 V
Package body materialPLASTIC/EPOXY
encapsulated codeHVQCCN
Encapsulate equivalent codeLCC40,.24SQ,20
Package shapeSQUARE
Package formCHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)NOT SPECIFIED
Maximum seat height0.8 mm
surface mountYES
Switch configurationBUCK
technologyCMOS
Temperature levelAUTOMOTIVE
Terminal formNO LEAD
Terminal pitch0.5 mm
Terminal locationQUAD
Maximum time at peak reflow temperatureNOT SPECIFIED
width6 mm
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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Description DC/DC Cntrlr Dual-OUT Step Down 1000kHz 40-Pin QFN EP T/R DC/DC Cntrlr Dual-OUT Step Down 1000kHz 40-Pin QFN EP Tube DC/DC Cntrlr Dual-OUT Step Down 1000kHz 40-Pin QFN EP T/R DC/DC Cntrlr Dual-OUT Step Down 1000kHz 40-Pin QFN EP Tube DC/DC Cntrlr Dual-OUT Step Down 1000kHz 40-Pin QFN EP T/R DC/DC Cntrlr Dual-OUT Step Down 1000kHz 40-Pin QFN EP Tube DC/DC Cntrlr Dual-OUT Step Down 1000kHz 40-Pin QFN EP Tube DC/DC Cntrlr Dual-OUT Step Down 1000kHz 40-Pin QFN EP T/R
Brand Name Analog Devices Inc Analog Devices Inc Analog Devices Inc Analog Devices Inc Analog Devices Inc Analog Devices Inc Analog Devices Inc Analog Devices Inc
Is it lead-free? Contains lead Contains lead Contains lead Contains lead Contains lead Contains lead Contains lead Contains lead
Is it Rohs certified? conform to conform to conform to conform to conform to conform to conform to conform to
Maker ADI ADI ADI ADI ADI ADI ADI ADI
package instruction HVQCCN, LCC40,.24SQ,20 HVQCCN, LCC40,.24SQ,20 HVQCCN, LCC40,.24SQ,20 HVQCCN, LCC40,.24SQ,20 HVQCCN, LCC40,.24SQ,20 HVQCCN, LCC40,.24SQ,20 HVQCCN, LCC40,.24SQ,20 HVQCCN, LCC40,.24SQ,20
Contacts 40 40 40 40 40 40 40 40
Manufacturer packaging code 05-08-1728 05-08-1728 05-08-1728 05-08-1728 05-08-1728 05-08-1728 05-08-1728 05-08-1728
Reach Compliance Code compliant compliant compliant compliant compliant compliant compliant compliant
Other features SEATED HT-CALCULATED SEATED HT-CALCULATED SEATED HT-CALCULATED SEATED HT-CALCULATED SEATED HT-CALCULATED SEATED HT-CALCULATED SEATED HT-CALCULATED SEATED HT-CALCULATED
Analog Integrated Circuits - Other Types SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER
control mode CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE
Control Technology PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION
Maximum input voltage 34 V 24 V 24 V 24 V 24 V 34 V 24 V 24 V
Minimum input voltage 4.5 V 4.5 V 4.5 V 4.5 V 4.5 V 4.5 V 4.5 V 4.5 V
Nominal input voltage 12 V 12 V 12 V 12 V 12 V 12 V 12 V 12 V
JESD-30 code S-PQCC-N40 S-PQCC-N40 S-PQCC-N40 S-PQCC-N40 S-PQCC-N40 S-PQCC-N40 S-PQCC-N40 S-PQCC-N40
length 6 mm 6 mm 6 mm 6 mm 6 mm 6 mm 6 mm 6 mm
Number of functions 2 2 2 2 2 2 2 2
Number of terminals 40 40 40 40 40 40 40 40
Maximum operating temperature 125 °C 125 °C 125 °C 125 °C 125 °C 125 °C 125 °C 125 °C
Minimum operating temperature -40 °C -40 °C -40 °C -40 °C -40 °C -40 °C -40 °C -40 °C
Maximum output voltage 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V
Minimum output voltage 0.5 V 0.5 V 0.5 V 0.5 V 0.5 V 0.5 V 0.5 V 0.5 V
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code HVQCCN HVQCCN HVQCCN HVQCCN HVQCCN HVQCCN HVQCCN HVQCCN
Encapsulate equivalent code LCC40,.24SQ,20 LCC40,.24SQ,20 LCC40,.24SQ,20 LCC40,.24SQ,20 LCC40,.24SQ,20 LCC40,.24SQ,20 LCC40,.24SQ,20 LCC40,.24SQ,20
Package shape SQUARE SQUARE SQUARE SQUARE SQUARE SQUARE SQUARE SQUARE
Package form CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius) NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
Maximum seat height 0.8 mm 0.8 mm 0.8 mm 0.8 mm 0.8 mm 0.8 mm 0.8 mm 0.8 mm
surface mount YES YES YES YES YES YES YES YES
Switch configuration BUCK BUCK BUCK BUCK BUCK BUCK BUCK BUCK
technology CMOS CMOS CMOS CMOS CMOS CMOS CMOS CMOS
Temperature level AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE
Terminal form NO LEAD NO LEAD NO LEAD NO LEAD NO LEAD NO LEAD NO LEAD NO LEAD
Terminal pitch 0.5 mm 0.5 mm 0.5 mm 0.5 mm 0.5 mm 0.5 mm 0.5 mm 0.5 mm
Terminal location QUAD QUAD QUAD QUAD QUAD QUAD QUAD QUAD
Maximum time at peak reflow temperature NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
width 6 mm 6 mm 6 mm 6 mm 6 mm 6 mm 6 mm 6 mm
JESD-609 code - e3 e3 e3 e3 - e3 e3
Terminal surface - Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) - Matte Tin (Sn) Matte Tin (Sn)
Base Number Matches - 1 1 1 - 1 1 1
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