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LTC3883IUH#TRPBF

Description
DC/DC Cntrlr Single-OUT Step Down 1000kHz Automotive 32-Pin QFN EP T/R
File Size1MB,116 Pages
ManufacturerADI
Websitehttps://www.analog.com
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LTC3883IUH#TRPBF Overview

DC/DC Cntrlr Single-OUT Step Down 1000kHz Automotive 32-Pin QFN EP T/R

LTC3883IUH#TRPBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
HTS8542.39.00.01
Number of Outputs1
TopologyStep Down
Output Voltage (V)0.5 to 5.4
Maximum Switching Frequency (kHz)1000
Minimum Input Voltage (V)4.5
Maximum Input Voltage (V)24
Operating Supply Voltage (V)4.5 to 24
Maximum Supply Current (mA)30(Typ)
Minimum Switching Frequency (kHz)250
Synchronous RectifierYes
Synchronous ClockYes
Control MethodPWM
ProgrammabilityYes
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)125
Supplier Temperature GradeIndustrial
PackagingTape and Reel
Supplier PackageQFN EP
Pin Count32
Standard Package NameQFN
MountingSurface Mount
Package Height0.75(Max)
Package Length5
Package Width5
PCB changed32
Lead ShapeNo Lead
LTC3883/LTC3883-1
Single Phase Step-Down DC/DC Controller with
Digital Power System Management
FEATURES
PMBus/I
2
C Compliant Serial Interface
n
Telemetry Read-Back Includes V , I , V
IN IN OUT
,
I
OUT
, Temperature and Faults
n
Programmable Voltage, Current Limit, Digital
Soft-Start/Stop, Sequencing, Margining, OV/UV/OC
and Frequency Synchronization (250kHz to 1MHz)
n
±0.5% Output Voltage Accuracy over Temperature
n
Integrated 16-Bit ADC and 12-Bit DAC
n
Integrated High Side Current Sense Amplifier
n
Internal EEPROM with ECC and Fault Logging
n
Integrated N-Channel MOSFET Gate Drivers
Power Conversion
n
Wide V Range: 4.5V to 24V
IN
n
V
OUT
Range: 0.5V to 5.4V
n
Analog Current Mode Control Loop
n
Accurate PolyPhase
®
Current Sharing for Up to 6 Phases
n
Auto Calibration of Inductor DCR
n
Minimum On Time 45ns
n
Available in a 32-Lead (5mm
×
5mm) QFN Package
n
AEC-Q100 Qualified for Automotive Applications
n
DESCRIPTION
The
LTC
®
3883/LTC3883-1
are PolyPhase capable DC/DC
synchronous step-down switching regulator controllers
with a
PMBus compliant serial interface.
The controllers
use a constant frequency, current mode architecture that
is supported by the
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 on-chip EEPROM.
The LTC3883/LTC3883-1 can be configured for Burst
Mode
®
operation, discontinuous (pulse-skipping) mode or
continuous inductor current mode. The LTC3883 incorpo-
rates an internal 5V linear regulator while the LTC3883-1
uses an external 5V supply for minimum power loss.
The LTC3883/LTC3883-1 are available in a 32-lead 5mm
×
5mm QFN package.
All registered trademarks and trademarks are the property of their respective owners. Protected
by U.S. Patents including 5481178, 5705919, 5929620, 6100678, 6144194, 6177787, 5408150,
6580258, 6304066, 7420359. Licensed under U.S. Patent 7000125 and other related patents
worldwide.
APPLICATIONS
n
n
n
High Current Distributed Power Systems
Telecom Systems
Intelligent Energy Efficient Power Regulation
TYPICAL APPLICATION
V
IN
6V TO 24V
5m
10µF
100
1µF
I
IN_SNS
V
IN_SNS
22µF
V
IN
LTC3883*
PMBus
INTERFACE
SDA
SCL
ALERT
RUN
GPIO
PGOOD
I
SENSE+
I
SENSE–
V
SENSE
TSNS
2200pF
I
TH
V
DD33
V
DD25
SGND
3883 TA01a
100
INTV
CC
TG
BOOST
SW
BG
D1
0.1µF
1µF
M1
10µF
100
90
0.56µH
M2
1.4k
0.22µF
V
OUT
1.8V
20A
80
EFFICIENCY (%)
70
60
50
40
30
20
10
Efficiency and Power Loss
vs Load Current
V
IN
= 12V
V
OUT
= 1.8V
f
SW
= 350kHz
8
7
6
POWER LOSS (W)
5
4
3
2
1
1
0.1
10
LOAD CURRENT (A)
0
100
3883 TA01b
10nF
4.99k
FAULT
MANAGEMENT
TO/FROM
OTHER LTC DEVICES
WRITE PROTECT
MMBT3906
C
OUT
530µF
0
0.01
1µF
1µF
*SOME DETAILS OMITTED
FOR CLARITY
SHARE_CLK
WP
Rev. F
Document Feedback
For more information
www.analog.com
1

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Description DC/DC Cntrlr Single-OUT Step Down 1000kHz Automotive 32-Pin QFN EP T/R DC/DC Cntrlr Single-OUT Step Down 1000kHz Automotive 32-Pin QFN EP Tube DC/DC Cntrlr Single-OUT Step Down 1000kHz Automotive 32-Pin QFN EP T/R DC/DC Cntrlr Single-OUT Step Down 1000kHz 32-Pin QFN EP Tube DC/DC Cntrlr Single-OUT Step Down 1000kHz 32-Pin QFN EP T/R DC/DC Cntrlr Single-OUT Step Down 1000kHz Automotive 32-Pin QFN EP Tube
EU restricts the use of certain hazardous substances Compliant Compliant Compliant Compliant Compliant Compliant
ECCN (US) EAR99 EAR99 EAR99 EAR99 EAR99 EAR99
Part Status Active Active Active Active Active Active
Number of Outputs 1 1 1 1 1 1
Topology Step Down Step Down Step Down Step Down Step Down Step Down
Output Voltage (V) 0.5 to 5.4 0.5 to 5.4 0.5 to 5.4 0.5 to 5.4 0.5 to 5.4 0.5 to 5.4
Maximum Switching Frequency (kHz) 1000 1000 1000 1000 1000 1000
Minimum Input Voltage (V) 4.5 4.5 4.5 4.5 4.5 4.5
Maximum Input Voltage (V) 24 24 24 24 24 24
Operating Supply Voltage (V) 4.5 to 24 4.5 to 24 4.5 to 24 4.5 to 24 4.5 to 24 4.5 to 24
Maximum Supply Current (mA) 30(Typ) 30(Typ) 30(Typ) 30(Typ) 30(Typ) 30(Typ)
Minimum Switching Frequency (kHz) 250 250 250 250 250 250
Synchronous Rectifier Yes Yes Yes Yes Yes Yes
Synchronous Clock Yes Yes Yes Yes Yes Yes
Control Method PWM PWM PWM PWM PWM PWM
Programmability Yes Yes Yes Yes Yes Yes
Minimum Operating Temperature (°C) -40 -40 -40 -40 -40 -40
Maximum Operating Temperature (°C) 125 105 105 105 105 125
Supplier Temperature Grade Industrial Extended Extended Extended Extended Industrial
Packaging Tape and Reel Tube Tape and Reel Tube Tape and Reel Tube
Supplier Package QFN EP QFN EP QFN EP QFN EP QFN EP QFN EP
Pin Count 32 32 32 32 32 32
Standard Package Name QFN QFN QFN QFN QFN QFN
Mounting Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount
Package Height 0.75(Max) 0.75(Max) 0.75(Max) 0.75(Max) 0.75(Max) 0.75(Max)
Package Length 5 5 5 5 5 5
Package Width 5 5 5 5 5 5
PCB changed 32 32 32 32 32 32
Lead Shape No Lead No Lead No Lead No Lead No Lead No Lead
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