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LT1676IS8#TRPBF

Description
IC REG BUCK ADJ 0.55A 8SOIC
CategoryPower/power management    The power supply circuit   
File Size329KB,8 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
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LT1676IS8#TRPBF Overview

IC REG BUCK ADJ 0.55A 8SOIC

LT1676IS8#TRPBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
MakerLinear ( ADI )
Parts packaging codeSOIC
package instructionSOP, SOP8,.25
Contacts8
Manufacturer packaging codeS8
Reach Compliance Codecompliant
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING REGULATOR
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage60 V
Minimum input voltage7.4 V
Nominal input voltage48 V
JESD-30 codeR-PDSO-G8
JESD-609 codee3
length4.9 mm
Humidity sensitivity level1
Number of functions1
Number of terminals8
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Maximum output current1 A
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Encapsulate equivalent codeSOP8,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)250
Certification statusNot Qualified
Maximum seat height1.75 mm
surface mountYES
Switch configurationBUCK
Maximum switching frequency115 kHz
technologyBIPOLAR
Temperature levelINDUSTRIAL
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width3.9 mm
DEMO MANUAL DC204
NO-DESIGN SWITCHER
DESCRIPTIO
LT1676/LT1776 High Voltage
High Efficiency Step-Down
DC/DC Converters
turn-on rise time. This eliminates pulse skipping, which
helps reduce output ripple voltage and switching noise in
the audio frequency spectrum. Additionally, the supply
current can be shut down to less than 20µA in standby
mode. Demonstration circuit DC204 Version B is also a
high efficiency step-down regulator using the LT1776
switching regulator. The LT1776 is identical to the LT1676
with the exception that its nominal operating frequency is
200kHz.
Gerber files for this circuit board are available.
Call the LTC factory.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Demonstration circuit DC204 Version A is a high efficiency
step-down (buck) regulator using the LT1676 switching
regulator. Typical applications include automotive DC/DC
conversion, telecom 48V step-down and IEEE1394 step-
down converters. This controller includes an onboard
700mA peak-current switch and is optimized for use with
a high supply voltage. The input voltage can range from 7V
to 60V. The output voltage is jumper selectable to either
3.3V or 5V. The LT1676 uses a 100kHz switching fre-
quency and current mode control, resulting in very high
efficiency, low ripple and fast transient response. At low
output currents, the LT1676 automatically slows down the
PERFOR A CE SU
SYMBOL
V
IN
V
OUT
I
O
V
RIP
f
O
I
Q
PARAMTER
Input Voltage Range
Output Voltage (Jumper Selectable)
Maximum Output Load Current
Typical Output Ripple
Nominal Operating Frequency
Supply Current in Shutdown
TYPICAL PERFOR A CE CHARACTERISTICS A D BOARD PHOTO
LT1676 Output Efficiency
V
IN
= 40V, V
OUT
= 5V
90
EFFICIENCY (%)
80
70
60
0
100
200
300
400
LOAD CURRENT (mA)
500
DC204 BP
DC204 F00
U
WW
U W
U
U W
ARY
T
A
= 25°C
CONDITIONS
Version A (LT1676)
Version B (LT1776)
See Figure 1
V
IN
> 12V
V
IN
12V , V
OUT
= 5V
I
O
= 500mA
Version A (LT1676)
Version B (LT1776)
J1
Closed
J1
J1
Closed
Open
JUMPER POSITION
VALUE
7V to 60V
7V to 60V
5V
3.3V
500mA
450mA
16mV
P-P
100kHz
200kHz
20µA
Component Side
1

LT1676IS8#TRPBF Related Products

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Description IC REG BUCK ADJ 0.55A 8SOIC board eval for lt1776cs8 IC reg buck adj 0.7A 8soic IC reg buck adj 0.7A 8soic IC reg buck adj 0.7A 8soic IC REG BUCK ADJ 0.55A 8DIP IC REG BUCK ADJ 0.55A 8SOIC IC REG BUCK ADJ 0.55A 8DIP
Brand Name Linear Technology - Linear Technology Linear Technology Linear Technology Linear Technology Linear Technology Linear Technology
Is it Rohs certified? conform to - conform to conform to incompatible conform to conform to conform to
Maker Linear ( ADI ) - Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI )
Parts packaging code SOIC - SOIC SOIC SOIC DIP SOIC DIP
package instruction SOP, SOP8,.25 - SOP, SOP8,.25 SOP, SOP8,.25 SOP, SOP8,.25 DIP, DIP8,.3 SOP, SOP8,.25 DIP, DIP8,.3
Contacts 8 - 8 8 8 8 8 8
Manufacturer packaging code S8 - S8 S8 S8 N S8 N
Reach Compliance Code compliant - compliant compliant not_compliant compliant compliant compliant
ECCN code EAR99 - EAR99 EAR99 EAR99 EAR99 EAR99 EAR99
Analog Integrated Circuits - Other Types SWITCHING REGULATOR - SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR
control 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
Maximum input voltage 60 V - 60 V 60 V 60 V 60 V 60 V 60 V
Minimum input voltage 7.4 V - 7.4 V 7.4 V 7.4 V 7.4 V 7.4 V 7.4 V
Nominal input voltage 48 V - 48 V 48 V 48 V 48 V 48 V 48 V
JESD-30 code R-PDSO-G8 - R-PDSO-G8 R-PDSO-G8 R-PDSO-G8 R-PDIP-T8 R-PDSO-G8 R-PDIP-T8
JESD-609 code e3 - e3 e3 e0 e3 e3 e3
length 4.9 mm - 4.9 mm 4.9 mm 4.9 mm - 4.9 mm -
Humidity sensitivity level 1 - 1 1 1 1 1 1
Number of functions 1 - 1 1 1 1 1 1
Number of terminals 8 - 8 8 8 8 8 8
Maximum operating temperature 85 °C - 70 °C 85 °C 70 °C 85 °C 70 °C 70 °C
Maximum output current 1 A - 1 A 1 A 1 A 1 A 1 A 1 A
Package body material PLASTIC/EPOXY - PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code SOP - SOP SOP SOP DIP SOP DIP
Encapsulate equivalent code SOP8,.25 - SOP8,.25 SOP8,.25 SOP8,.25 DIP8,.3 SOP8,.25 DIP8,.3
Package shape RECTANGULAR - RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE - SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE IN-LINE SMALL OUTLINE IN-LINE
Peak Reflow Temperature (Celsius) 250 - 260 260 235 NOT SPECIFIED 250 NOT SPECIFIED
Certification status Not Qualified - Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified
Maximum seat height 1.75 mm - 1.75 mm 1.75 mm 1.75 mm 3.937 mm 1.75 mm 3.937 mm
surface mount YES - YES YES YES NO YES NO
Switch configuration BUCK - BUCK BUCK BUCK BUCK BUCK BUCK
Maximum switching frequency 115 kHz - 115 kHz 115 kHz 115 kHz 115 kHz 115 kHz 115 kHz
technology BIPOLAR - BIPOLAR BIPOLAR BIPOLAR BIPOLAR BIPOLAR BIPOLAR
Temperature level INDUSTRIAL - COMMERCIAL INDUSTRIAL COMMERCIAL INDUSTRIAL COMMERCIAL COMMERCIAL
Terminal surface Matte Tin (Sn) - Matte Tin (Sn) Matte Tin (Sn) Tin/Lead (Sn/Pb) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn)
Terminal form GULL WING - GULL WING GULL WING GULL WING THROUGH-HOLE GULL WING THROUGH-HOLE
Terminal pitch 1.27 mm - 1.27 mm 1.27 mm 1.27 mm 2.54 mm 1.27 mm 2.54 mm
Terminal location DUAL - DUAL DUAL DUAL DUAL DUAL DUAL
Maximum time at peak reflow temperature NOT SPECIFIED - 30 30 20 NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
width 3.9 mm - 3.9 mm 3.9 mm 3.9 mm 7.62 mm 3.9 mm 7.62 mm
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