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LTC3638HMSE#PBF

Description
IC REG BUCK ADJ 0.25A 16MSOP
CategoryPower/power management    The power supply circuit   
File Size649KB,26 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
Download Datasheet Parametric Compare View All

LTC3638HMSE#PBF Overview

IC REG BUCK ADJ 0.25A 16MSOP

LTC3638HMSE#PBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
MakerLinear ( ADI )
Parts packaging codeMSOP
package instructionHTSSOP,
Contacts16
Manufacturer packaging codeMSE
Reach Compliance Codecompliant
ECCN codeEAR99
Other featuresALSO OPERATES IN ADJUSTABLE MODE FROM 0.8 TO 140V
Analog Integrated Circuits - Other TypesSWITCHING REGULATOR
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage140 V
Minimum input voltage4 V
Nominal input voltage12 V
JESD-30 codeR-PDSO-G16
JESD-609 codee3
length4.039 mm
Humidity sensitivity level1
Number of functions1
Number of terminals16
Maximum operating temperature150 °C
Minimum operating temperature-40 °C
Nominal output voltage1.8 V
Package body materialPLASTIC/EPOXY
encapsulated codeHTSSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)260
Maximum seat height1.1 mm
surface mountYES
Switch configurationBUCK
Maximum switching frequency200 kHz
technologyCMOS
Temperature levelAUTOMOTIVE
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch0.5 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width3 mm
LTC3638
High Efficiency, 140V
250mA Step-Down
Regulator
FEATURES
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DESCRIPTION
The
LTC
®
3638
is a high efficiency step-down DC/DC
regulator with internal power switch that draws only 12μA
typical DC supply current while maintaining a regulated
output voltage at no load.
The LTC3638 can supply up to 250mA load current and
features a programmable peak current limit that provides
a simple method for optimizing efficiency and for reduc-
ing output ripple and component size. The LTC3638’s
combination of Burst Mode
®
operation, integrated power
switch, low quiescent current, and programmable peak
current limit provides high efficiency over a broad range
of load currents.
With its wide input range of 4V to 140V and programmable
overvoltage lockout, the LTC3638 is a robust regulator
suited for regulating from a wide variety of power sources.
Additionally, the LTC3638 includes a precise run threshold
and soft-start feature to guarantee that the power system
start-up is well-controlled in any environment. A feedback
comparator output enables multiple LTC3638s to be con-
nected in parallel for higher current applications.
The LTC3638 is available in a thermally enhanced high
voltage-capable 16-lead MSE package with four missing pins.
L,
LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners.
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Wide Operating Input Voltage Range: 4V to 140V
Internal Low Resistance Power MOSFET
No Compensation Required
Adjustable 20mA to 250mA Maximum Output
Current
Low Dropout Operation: 100% Duty Cycle
Low Quiescent Current: 12µA
Wide Output Range: 0.8V to V
IN
0.8V ±1% Feedback Voltage Reference
Precise RUN Pin Threshold
Internal or External Soft-Start
Programmable 1.8V, 3.3V, 5V or Adjustable Output
Few External Components Required
Programmable Input Overvoltage Lockout
Thermally Enhanced High Voltage MSOP Package
APPLICATIONS
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Industrial Control Supplies
Medical Devices
Distributed Power Systems
Portable Instruments
Battery-Operated Devices
Avionics
Automotive
TYPICAL APPLICATION
5V to 140V Input to 5V Output, 250mA Step-Down Regulator
V
IN
5V TO 140V
C
IN
1µF
250V
L1
220µH
V
IN
LTC3638
RUN
V
FB
C
OUT
22µF
SW
V
OUT
5V
250mA
Efficiency and Power Loss vs Load Current
100
90
80
EFFICIENCY (%)
70
60
50
40
30
20
10
3638 TA01a
EFFICIENCY
V
IN
= 12V
V
IN
= 48V
V
IN
= 140V
POWER LOSS (mW)
1000
100
10
OVLO
SS
V
PRG1
V
PRG2
GND
POWER LOSS
0
0.1
1
10
100
LOAD CURRENT (mA)
1
1000
3638 TA01b
3638fa
For more information
www.linear.com/LTC3638
1

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Description IC REG BUCK ADJ 0.25A 16MSOP IC reg buck adj 0.25a 16msop IC reg buck adj 0.25a 16msop IC REG BUCK ADJ 0.25A 16MSOP IC REG BUCK ADJ 0.25A 16MSOP IC REG BUCK ADJ 0.25A 16MSOP IC REG BUCK ADJ 0.25A 16MSOP IC REG BUCK ADJ 0.25A 16MSOP
Brand Name Linear Technology Linear Technology Linear Technology - Linear Technology Linear Technology Linear Technology -
Is it Rohs certified? conform to conform to conform to - conform to conform to conform to -
Maker Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) - Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) -
Parts packaging code MSOP MSOP MSOP - MSOP MSOP MSOP -
package instruction HTSSOP, HTSSOP, HTSSOP, - HTSSOP, HTSSOP, HTSSOP, -
Contacts 16 16 16 - 16 16 16 -
Manufacturer packaging code MSE MSE MSE - MSE MSE MSE -
Reach Compliance Code compliant compli compliant - compliant compliant compliant -
ECCN code EAR99 EAR99 EAR99 - EAR99 EAR99 EAR99 -
Other features ALSO OPERATES IN ADJUSTABLE MODE FROM 0.8 TO 140V ALSO OPERATES IN ADJUSTABLE MODE FROM 0.8 TO 140V ALSO OPERATES IN ADJUSTABLE MODE FROM 0.8 TO 140V - ALSO OPERATES IN ADJUSTABLE MODE FROM 0.8 TO 140V ALSO OPERATES IN ADJUSTABLE MODE FROM 0.8 TO 140V ALSO OPERATES IN ADJUSTABLE MODE FROM 0.8 TO 140V -
Analog Integrated Circuits - Other Types SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR - SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR -
Control Technology PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION - PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION -
Maximum input voltage 140 V 140 V 140 V - 140 V 140 V 140 V -
Minimum input voltage 4 V 4 V 4 V - 4 V 4 V 4 V -
Nominal input voltage 12 V 12 V 12 V - 12 V 12 V 12 V -
JESD-30 code R-PDSO-G16 R-PDSO-G16 R-PDSO-G16 - R-PDSO-G16 R-PDSO-G16 R-PDSO-G16 -
JESD-609 code e3 e3 e3 - e3 e3 e3 -
length 4.039 mm 4.039 mm 4.039 mm - 4.039 mm 4.039 mm 4.039 mm -
Humidity sensitivity level 1 1 1 - 1 1 1 -
Number of functions 1 1 1 - 1 1 1 -
Number of terminals 16 16 16 - 16 16 16 -
Maximum operating temperature 150 °C 125 °C 85 °C - 150 °C 85 °C 125 °C -
Nominal output voltage 1.8 V 1.8 V 1.8 V - 1.8 V 1.8 V 1.8 V -
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY - PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY -
encapsulated code HTSSOP HTSSOP HTSSOP - HTSSOP HTSSOP HTSSOP -
Package shape RECTANGULAR RECTANGULAR RECTANGULAR - RECTANGULAR RECTANGULAR RECTANGULAR -
Package form SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH - SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH -
Peak Reflow Temperature (Celsius) 260 260 260 - 260 260 260 -
Maximum seat height 1.1 mm 1.1 mm 1.1 mm - 1.1 mm 1.1 mm 1.1 mm -
surface mount YES YES YES - YES YES YES -
Switch configuration BUCK BUCK BUCK - BUCK BUCK BUCK -
Maximum switching frequency 200 kHz 200 kHz 200 kHz - 200 kHz 200 kHz 200 kHz -
technology CMOS CMOS CMOS - CMOS CMOS CMOS -
Temperature level AUTOMOTIVE AUTOMOTIVE OTHER - AUTOMOTIVE OTHER AUTOMOTIVE -
Terminal surface Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) - Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) -
Terminal form GULL WING GULL WING GULL WING - GULL WING GULL WING GULL WING -
Terminal pitch 0.5 mm 0.5 mm 0.5 mm - 0.5 mm 0.5 mm 0.5 mm -
Terminal location DUAL DUAL DUAL - DUAL DUAL DUAL -
Maximum time at peak reflow temperature 30 30 30 - 30 30 30 -
width 3 mm 3 mm 3 mm - 3 mm 3 mm 3 mm -
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