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LTC3418EUHF#PBF

Description
IC REG BUCK ADJ 8A SYNC 38QFN
CategoryPower/power management    The power supply circuit   
File Size471KB,22 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
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LTC3418EUHF#PBF Overview

IC REG BUCK ADJ 8A SYNC 38QFN

LTC3418EUHF#PBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
MakerLinear ( ADI )
Parts packaging codeQFN
package instructionHVQCCN, LCC38,.2X.28,20
Contacts38
Manufacturer packaging codeUHF
Reach Compliance Codecompliant
ECCN codeEAR99
Samacsys DescriptionLinear Technology LTC3418EUHF#PBF, 1-Channel, Step Down DC-DC Converter, Adjustable 38-Pin, QFN
Analog Integrated Circuits - Other TypesSWITCHING REGULATOR
control modeCURRENT-MODE
Maximum input voltage5.5 V
Minimum input voltage2.25 V
Nominal input voltage3.3 V
JESD-30 codeR-PQCC-N38
JESD-609 codee3
length7 mm
Humidity sensitivity level1
Number of functions1
Number of terminals38
Maximum operating temperature85 °C
Minimum operating temperature
Maximum output current17 A
Package body materialPLASTIC/EPOXY
encapsulated codeHVQCCN
Encapsulate equivalent codeLCC38,.2X.28,20
Package shapeRECTANGULAR
Package formCHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum seat height0.8 mm
surface mountYES
Switch configurationBUCK
Maximum switching frequency4000 kHz
technologyCMOS
Temperature levelOTHER
Terminal surfaceMatte Tin (Sn)
Terminal formNO LEAD
Terminal pitch0.5 mm
Terminal locationQUAD
Maximum time at peak reflow temperature30
width5 mm
FeaTures
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LTC3418
8A, 4MHz, Monolithic
Synchronous Step-Down
Regulator
DescripTion
The
LTC
®
3418
is a high efficiency, monolithic synchronous
step-down DC/DC converter utilizing a constant frequency,
current mode architecture. It operates from an input voltage
range of 2.25V to 5.5V and provides a regulated output
voltage from 0.8V to 5V while delivering up to 8A of output
current. The internal synchronous power switch increases
efficiency and eliminates the need for an external Schottky
diode. Switching frequency is set by an external resistor
or can be synchronized to an external clock. OPTI-LOOP
®
compensation allows the transient response to be optimized
over a wide range of loads and output capacitors.
The LTC3418 can be configured for either Burst Mode
operation or forced continuous operation. Forced con-
tinuous operation reduces noise and RF interference
while Burst Mode operation provides high efficiency by
reducing gate charge losses at light loads. In Burst Mode
operation, external control of the burst clamp level allows
the output voltage ripple to be adjusted according to the
requirements of the application. A tracking input in the
LTC3418 allows for proper sequencing with respect to
another power supply.
L,
LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
Burst Mode and OPTI-LOOP are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners. Protected by U.S. Patents
including 5481178, 6580258, 6304066, 6127815, 6498466, 6611131, 6724174.
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High Efficiency: Up to 95%
8A Output Current
2.25V to 5.5V Input Voltage Range
Low R
DS(ON)
Internal Switch: 35mΩ
Tracking Input to Provide Easy Supply Sequencing
Programmable Frequency: 300kHz to 4MHz
0.8V ±1% Reference Allows Low Output Voltage
Quiescent Current: 380µA
Selectable Forced Continuous/Burst Mode
®
Operation
with Adjustable Burst Clamp
Synchronizable Switching Frequency
Low Dropout Operation: 100% Duty Cycle
Power Good Output Voltage Monitor
Overtemperature Protected
38-Lead Low Profile (0.75mm) Thermally Enhanced
QFN (5mm
×
7mm) Package
applicaTions
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Microprocessor, DSP and Memory Supplies
Distributed 2.5V, 3.3V and 5V Power Systems
Automotive Applications
Point of Load Regulation
Notebook Computers
Typical applicaTion
2.5V/8A Step-Down Regulator
V
IN
2.8V TO 5.5V
SV
IN
TRACK PV
IN
R
T
2.2M
30.1k
SW
LTC3418
PGOOD
PGND
RUN/SS
SGND
I
TH
SYNC/MODE V
FB
332
1.69k
4.32k
3418 TA01a
Efficiency and Power Loss vs Load Current
100
100000
EFFICIENCY
90
C
IN
47µF
×4
0.2µH
C
OUT
100µF
×2
EFFICIENCY (%)
V
OUT
2.5V
8A
80
70
60
50
40
30
20
0.01
0.1
1
LOAD CURRENT (A)
V
IN
= 3.3V
V
OUT
= 2.5V
10
3418 TA01b
10000
POWER LOSS (mW)
1000
POWER LOSS
1000pF
4.99k
100
10
820pF
1
3418fc
For more information
www.linear.com/LTC3418
1

LTC3418EUHF#PBF Related Products

LTC3418EUHF#PBF LTC3418EUHF#TRPBF
Description IC REG BUCK ADJ 8A SYNC 38QFN IC REG BUCK ADJ 8A SYNC 38QFN
Brand Name Linear Technology Linear Technology
Is it Rohs certified? conform to conform to
Maker Linear ( ADI ) Linear ( ADI )
Parts packaging code QFN QFN
package instruction HVQCCN, LCC38,.2X.28,20 HVQCCN, LCC38,.2X.28,20
Contacts 38 38
Manufacturer packaging code UHF UHF
Reach Compliance Code compliant compliant
ECCN code EAR99 EAR99
Samacsys Description Linear Technology LTC3418EUHF#PBF, 1-Channel, Step Down DC-DC Converter, Adjustable 38-Pin, QFN Switching Voltage Regulators 8A, 4MHz, Mono Sync Buck Reg
Analog Integrated Circuits - Other Types SWITCHING REGULATOR SWITCHING REGULATOR
control mode CURRENT-MODE CURRENT-MODE
Maximum input voltage 5.5 V 5.5 V
Minimum input voltage 2.25 V 2.25 V
Nominal input voltage 3.3 V 3.3 V
JESD-30 code R-PQCC-N38 R-PQCC-N38
JESD-609 code e3 e3
length 7 mm 7 mm
Humidity sensitivity level 1 1
Number of functions 1 1
Number of terminals 38 38
Maximum operating temperature 85 °C 85 °C
Maximum output current 17 A 17 A
Package body material PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code HVQCCN HVQCCN
Encapsulate equivalent code LCC38,.2X.28,20 LCC38,.2X.28,20
Package shape RECTANGULAR RECTANGULAR
Package form CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius) 260 260
Certification status Not Qualified Not Qualified
Maximum seat height 0.8 mm 0.8 mm
surface mount YES YES
Switch configuration BUCK BUCK
Maximum switching frequency 4000 kHz 4000 kHz
technology CMOS CMOS
Temperature level OTHER OTHER
Terminal surface Matte Tin (Sn) Matte Tin (Sn)
Terminal form NO LEAD NO LEAD
Terminal pitch 0.5 mm 0.5 mm
Terminal location QUAD QUAD
Maximum time at peak reflow temperature 30 30
width 5 mm 5 mm
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