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LTC3375IUK#PBF

Description
Conv DC-DC 2.7V to 5.5V Synchronous Step Down Single-Out 0.425V to 5.5V 1A Automotive 48-Pin QFN EP Tube
File Size563KB,36 Pages
ManufacturerADI
Websitehttps://www.analog.com
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LTC3375IUK#PBF Overview

Conv DC-DC 2.7V to 5.5V Synchronous Step Down Single-Out 0.425V to 5.5V 1A Automotive 48-Pin QFN EP Tube

LTC3375IUK#PBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
TypeSynchronous Step Down
Output TypeAdjustable
Switching Frequency (kHz)1000 to 3000
Switching RegulatorYes
Number of Outputs1
Output Voltage (V)0.425 to 5.5
Maximum Output Current (A)1
Minimum Input Voltage (V)2.7
Maximum Input Voltage (V)5.5
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)125
Supplier Temperature GradeIndustrial
PackagingTube
Pin Count48
Standard Package NameQFN
Supplier PackageQFN EP
MountingSurface Mount
Package Height0.75(Max)
Package Length7
Package Width7
PCB changed48
Lead ShapeNo Lead
LTC3375
8-Channel Programmable,
Parallelable 1A Buck DC/DCs
FeaTures
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DescripTion
The
LTC
®
3375
is a digitally programmable high efficiency
multioutput power supply IC. The DC/DCs consist of eight
synchronous buck converters (I
OUT
up to 1A each) all
powered from independent 2.25V to 5.5V input supplies.
DC/DC enables, output voltages, operating modes, and
phasing may all be independently programmed over I
2
C
or used in standalone mode via simple I/O with power-up
defaults. The DC/DCs may be used independently or in
parallel to achieve higher output currents of up to 4A per
output with a shared inductor. Alarm levels for high die
temperature may also be programmed via I
2
C with a mask-
able
IRQ
output for monitoring DC/DC and system faults.
Pushbutton ON/OFF/RESET control, power-on reset, and
a watchdog timer provide flexible and reliable power-up
sequencing and system monitoring. The LTC3375 is avail-
able in a low profile 48-lead 7mm
×
7mm QFN package.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
n
n
n
n
n
n
n
n
8-Channel Independent Step-Down DC/DCs
Master-Slave Configurable for Up to 4A Per Output
Channel with a Single Inductor
Independent V
IN
Supply for Each DC/DC
(2.25V to 5.5V)
All DC/DCs Have 0.425V to V
IN
Output Voltage Range
Precision Enable Pin Thresholds for Autonomous
Sequencing (or I
2
C Control)
1MHz to 3MHz Programmable/Synchronizable
Oscillator Frequency (2MHz Default)
I
2
C Selectable Phasing (90° Steps) Per Channel
Programmable Power-On Reset/Watch Dog/
Pushbutton Timing
Die Temperature Monitor Output
48-Lead (7mm
×
7mm) QFN Package
applicaTions
n
n
General Purpose Multichannel Power Supplies
Industrial/Automotive/Communications
Typical applicaTion
8-Channel 1A Multioutput Buck Regulator
4V TO 40V
V
IN1
SW1
FB1
2.2µH
10µF
LTC3375
MASTER
2.2µH
V
SHNT
ALWAYS-ON
LDO
V
CC
FBV
CC
ON
KILL
PB
PB
EN1
EN2
EN3
EN4
EN5
EN6
EN7
EN8
RST
TEMP
WDI
WD0
IRQ
I
2
C
SYNC
RT
0.425V TO V
IN1
UP TO 1A
Buck Efficiency vs Load
100
90
80
1A BUCK
2A BUCK
3A BUCK
4A BUCK
10µF
FB2
MASTER
V
IN7
SW7
FB7
2.2µH
SLAVE
10µF
MASTER
2.2µH
0.425V TO V
IN2
UP TO 1A
EFFICIENCY (%)
V
IN2
SW2
SLAVE
70
60
50
40
30
20
10
0.425V TO V
IN7
UP TO 1A
0
Burst Mode OPERATION
V
IN
= 3.3V
V
OUT
= 1.8V
f
OSC
= 2MHz
L = 2.2µH
1
100
1000
10
LOAD CURRENT (mA)
3375 TA01b
2
V
IN8
SW8
FB8
CT
SLAVE
10µF
0.425V TO V
IN8
UP TO 1A
3375 TA01a
3375fd
For more information
www.linear.com/3375
1

LTC3375IUK#PBF Related Products

LTC3375IUK#PBF LTC3375EUK#PBF LTC3375EUK#TRPBF LTC3375HUK#PBF LTC3375HUK#TRPBF LTC3375IUK#TRPBF
Description Conv DC-DC 2.7V to 5.5V Synchronous Step Down Single-Out 0.425V to 5.5V 1A Automotive 48-Pin QFN EP Tube Conv DC-DC 2.7V to 5.5V Synchronous Step Down Single-Out 0.425V to 5.5V 1A Automotive 48-Pin QFN EP Tube Conv DC-DC 2.7V to 5.5V Synchronous Step Down Single-Out 0.425V to 5.5V 1A Automotive 48-Pin QFN EP T/R Conv DC-DC 2.7V to 5.5V Synchronous Step Down Single-Out 0.425V to 5.5V 1A Automotive 48-Pin QFN EP Tube Conv DC-DC 2.7V to 5.5V Synchronous Step Down Single-Out 0.425V to 5.5V 1A Automotive 48-Pin QFN EP T/R Conv DC-DC 2.7V to 5.5V Synchronous Step Down Single-Out 0.425V to 5.5V 1A Automotive 48-Pin QFN EP T/R
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
Type Synchronous Step Down Synchronous Step Down Synchronous Step Down Synchronous Step Down Synchronous Step Down Synchronous Step Down
Output Type Adjustable Adjustable Adjustable Adjustable Adjustable Adjustable
Switching Frequency (kHz) 1000 to 3000 1000 to 3000 1000 to 3000 1000 to 3000 1000 to 3000 1000 to 3000
Switching Regulator Yes Yes Yes Yes Yes Yes
Number of Outputs 1 1 1 1 1 1
Output Voltage (V) 0.425 to 5.5 0.425 to 5.5 0.425 to 5.5 0.425 to 5.5 0.425 to 5.5 0.425 to 5.5
Maximum Output Current (A) 1 1 1 1 1 1
Minimum Input Voltage (V) 2.7 2.7 2.7 2.7 2.7 2.7
Maximum Input Voltage (V) 5.5 5.5 5.5 5.5 5.5 5.5
Minimum Operating Temperature (°C) -40 -40 -40 -40 -40 -40
Maximum Operating Temperature (°C) 125 125 125 150 150 125
Supplier Temperature Grade Industrial Extended Extended Automotive Automotive Industrial
Packaging Tube Tube Tape and Reel Tube Tape and Reel Tape and Reel
Pin Count 48 48 48 48 48 48
Standard Package Name QFN QFN QFN QFN QFN QFN
Supplier Package QFN EP QFN EP QFN EP QFN EP QFN EP QFN EP
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 7 7 7 7 7 7
Package Width 7 7 7 7 7 7
PCB changed 48 48 48 48 48 48
Lead Shape No Lead No Lead No Lead No Lead No Lead No Lead
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