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LTC3375HUK#TRPBF

Description
IC REG BUCK ADJ 1A 8OUT 48QFN
Categorysemiconductor    Power management   
File Size596KB,36 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
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LTC3375HUK#TRPBF Overview

IC REG BUCK ADJ 1A 8OUT 48QFN

LTC3375HUK#TRPBF Parametric

Parameter NameAttribute value
Functionstep down
Output configurationjust
Topologystep down
Output typeAdjustable
Number of outputs8
Voltage - Input (minimum)2.7V
Voltage - input (maximum)5.5V
Voltage - Output (minimum/fixed)0.425V
Voltage - Output (maximum)5.5V
Current - Output1A
Frequency - Switch2MHz
Synchronous rectifiernone
Operating temperature-40°C ~ 150°C(TJ)
Installation typesurface mount
Package/casing48-WFQFN Exposed Pad
Supplier device packaging48-QFN(7x7)
LTC3375
8-Channel Programmable,
Parallelable 1A Buck DC/DCs
FeaTures
n
n
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

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Description IC REG BUCK ADJ 1A 8OUT 48QFN IC REG BUCK ADJ 1A 8OUT 48QFN IC REG BUCK ADJ 1A 8OUT 48QFN IC REG BUCK ADJ 1A 8OUT 48QFN IC REG BUCK ADJ 1A 8OUT 48QFN Output current: 1A Switching operating frequency: 2MHz Output type: Adjustable Number of output voltage channels: 8 Function type: Step-Down Output configuration: Positive 8 channels, programmable, parallel 1A step-down DC/DC converter
Output configuration just just just just just Positive
Output type Adjustable Adjustable Adjustable Adjustable Adjustable Adjustable
Function step down step down step down step down step down -
Topology step down step down step down step down step down -
Number of outputs 8 8 8 8 8 -
Voltage - Input (minimum) 2.7V 2.7V 2.7V 2.7V 2.7V -
Voltage - input (maximum) 5.5V 5.5V 5.5V 5.5V 5.5V -
Voltage - Output (minimum/fixed) 0.425V 0.425V 0.425V 0.425V 0.425V -
Voltage - Output (maximum) 5.5V 5.5V 5.5V 5.5V 5.5V -
Current - Output 1A 1A 1A 1A 1A -
Frequency - Switch 2MHz 2MHz 2MHz 2MHz 2MHz -
Synchronous rectifier none none none none none -
Operating temperature -40°C ~ 150°C(TJ) -40°C ~ 150°C(TJ) -40°C ~ 150°C(TJ) -40°C ~ 150°C(TJ) -40°C ~ 150°C(TJ) -
Installation type surface mount surface mount surface mount surface mount surface mount -
Package/casing 48-WFQFN Exposed Pad 48-WFQFN Exposed Pad 48-WFQFN Exposed Pad 48-WFQFN Exposed Pad 48-WFQFN Exposed Pad -
Supplier device packaging 48-QFN(7x7) 48-QFN(7x7) 48-QFN(7x7) 48-QFN(7x7) 48-QFN(7x7) -
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