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LTC3638EMSE#PBF

Description
Conv DC-DC 4V to 140V Step Down Single-Out 0.8V to 140V 0.25A Automotive 12-Pin MSOP EP Tube
File Size633KB,26 Pages
ManufacturerADI
Websitehttps://www.analog.com
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LTC3638EMSE#PBF Overview

Conv DC-DC 4V to 140V Step Down Single-Out 0.8V to 140V 0.25A Automotive 12-Pin MSOP EP Tube

LTC3638EMSE#PBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
HTS8542.39.00.01
TypeStep Down
Output TypeAdjustable
Switching RegulatorYes
Number of Outputs1
Output Voltage (V)0.8 to 140
Maximum Output Current (A)0.25
Minimum Input Voltage (V)4
Maximum Input Voltage (V)140
Operating Supply Voltage (V)4 to 140
Typical Switch Current (A)0.575
Typical Quiescent Current (uA)12
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)125
Supplier Temperature GradeExtended
PackagingTube
Pin Count12
Standard Package NameSOP
Supplier PackageMSOP EP
MountingSurface Mount
Package Height0.86
Package Length4.04
Package Width3
PCB changed12
Lead ShapeGull-wing
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 Conv DC-DC 4V to 140V Step Down Single-Out 0.8V to 140V 0.25A Automotive 12-Pin MSOP EP Tube Conv DC-DC 4V to 140V Step Down Single-Out 0.8V to 140V 0.25A Automotive 12-Pin MSOP EP T/R Conv DC-DC 4V to 140V Step Down Single-Out 0.8V to 140V 0.25A Automotive 12-Pin MSOP EP Tube Conv DC-DC 4V to 140V Step Down Single-Out 0.8V to 140V 0.25A Automotive 12-Pin MSOP EP T/R Conv DC-DC 4V to 140V Step Down Single-Out 0.8V to 140V 0.25A Automotive 12-Pin MSOP EP Tube Conv DC-DC 4V to 140V Step Down Single-Out 0.8V to 140V 0.25A Automotive 12-Pin MSOP EP T/R Conv DC-DC 4V to 140V Step Down Single-Out 0.8V to 140V 0.25A Automotive 12-Pin MSOP EP Tube Conv DC-DC 4V to 140V Step Down Single-Out 0.8V to 140V 0.25A Automotive 12-Pin MSOP EP T/R
EU restricts the use of certain hazardous substances Compliant Compliant Compliant Compliant Compliant Compliant Compliant Compliant
ECCN (US) EAR99 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99
Part Status Active Active Active Active Active Active Active Active
HTS 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01
Type Step Down Step Down Step Down Step Down Step Down Step Down Step Down Step Down
Output Type Adjustable Adjustable Adjustable Adjustable Adjustable Adjustable Adjustable Adjustable
Switching Regulator Yes Yes Yes Yes Yes Yes Yes Yes
Number of Outputs 1 1 1 1 1 1 1 1
Output Voltage (V) 0.8 to 140 0.8 to 140 0.8 to 140 0.8 to 140 0.8 to 140 0.8 to 140 0.8 to 140 0.8 to 140
Maximum Output Current (A) 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25
Minimum Input Voltage (V) 4 4 4 4 4 4 4 4
Maximum Input Voltage (V) 140 140 140 140 140 140 140 140
Operating Supply Voltage (V) 4 to 140 4 to 140 4 to 140 4 to 140 4 to 140 4 to 140 4 to 140 4 to 140
Typical Switch Current (A) 0.575 0.575 0.575 0.575 0.575 0.575 0.575 0.575
Typical Quiescent Current (uA) 12 12 12 12 12 12 12 12
Minimum Operating Temperature (°C) -40 -40 -40 -40 -40 -40 -55 -55
Maximum Operating Temperature (°C) 125 125 150 150 125 125 150 150
Supplier Temperature Grade Extended Extended Automotive Automotive Industrial Industrial Military Military
Packaging Tube Tape and Reel Tube Tape and Reel Tube Tape and Reel Tube Tape and Reel
Pin Count 12 12 12 12 12 12 12 12
Standard Package Name SOP SOP SOP SOP SOP SOP SOP SOP
Supplier Package MSOP EP MSOP EP MSOP EP MSOP EP MSOP EP MSOP EP MSOP EP MSOP EP
Mounting Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount
Package Height 0.86 0.86 0.86 0.86 0.86 0.86 0.86 0.86
Package Length 4.04 4.04 4.04 4.04 4.04 4.04 4.04 4.04
Package Width 3 3 3 3 3 3 3 3
PCB changed 12 12 12 12 12 12 12 12
Lead Shape Gull-wing Gull-wing Gull-wing Gull-wing Gull-wing Gull-wing Gull-wing Gull-wing
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