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LTC1143LCS

Description
DC/DC Cntrlr Dual-OUT Step Down 400kHz 16-Pin SOIC N
CategoryPower/power management    The power supply circuit   
File Size285KB,20 Pages
ManufacturerADI
Websitehttps://www.analog.com
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LTC1143LCS Overview

DC/DC Cntrlr Dual-OUT Step Down 400kHz 16-Pin SOIC N

LTC1143LCS Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerADI
package instruction0.150 INCH, PLASTIC, SO-16
Reach Compliance Codenot_compliant
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeCURRENT-MODE
Control TechnologyCONSTANT OFF TIME
Maximum input voltage16 V
Minimum input voltage3.5 V
Nominal input voltage10 V
JESD-30 codeR-PDSO-G16
JESD-609 codee0
length9.9 mm
Humidity sensitivity level1
Number of functions2
Number of terminals16
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)235
Certification statusNot Qualified
Maximum seat height1.75 mm
surface mountYES
Switch configurationSINGLE
Maximum switching frequency400 kHz
Temperature levelCOMMERCIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperature20
width3.9 mm
Base Number Matches1
LTC1143/LTC1143L
LTC1143L-ADJ
Dual High Efficiency SO-16
Step-Down Switching Regulator
Controllers
DESCRIPTION
The LTC1143 series is a dual step-down switching regulator
controller featuring automatic Burst Mode
TM
operation to
maintain high efficiencies at low output currents. This
device is composed of two separate regulator blocks,
each driving an external power MOSFET at switching
frequencies up to 400kHz using a constant off-time current
mode architecture. Both fixed and adjustable voltages are
available.
The operating current level for both regulators is user-
programmable via an external current sense resistor.
Wide input supply range allows operation from 4V to 14V
(16V maximum). The LTC1143L and LTC1143L-ADJ
extend operation to V
IN
= 3.5V. 100% duty cycle provides
low dropout regulation limited only by the R
DS(ON)
of the
external MOSFET and resistance of the inductor and
current sense resistor.
The LTC1143 series is ideal for applications requiring dual
output voltages with high conversion efficiencies over a
wide load current range in a small amount of board space.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a trademark of Linear Technology Corporation.
FEATURES
s
s
s
s
s
s
s
s
s
Dual Outputs
LTC1143, LTC1143L: 3.3V, 5V
LTC1143L-ADJ: Dual Adjustable
Very High Efficiency: Over 95% Possible
Current Mode Operation for Excellent Line and Load
Transient Response
High Efficiency Maintained over Three Decades of
Output Current
Low Standby Current at Light Loads: 160µA/Output
Logic-Controlled Shutdown (LTC1143, LTC1143L)
Wide V
IN
Range: 3.5V to 16V
(LTC1143L, LTC1143L-ADJ)
Very Low Dropout Operation: 100% Duty Cycle
Available in Narrow 16-Pin SO Package
APPLICATIONS
s
s
s
s
s
Personal Digital Assistants
Notebook and Palmtop Computers
Battery-Operated Digital Devices
Portable Instruments
DC Power Distribution Systems
TYPICAL APPLICATION
+
C
IN1
22µF
25V
×
2
0.22µF
P1A
4
1
1000pF
C
OUT1
220µF
10V
×
2
13
V
IN1
P-DRIVE 1
SENSE
+
1
V
IN
4V TO 14V
5
V
IN2
P-DRIVE 2
SENSE
+
2
LTC1143L-ADJ
SENSE
2
V
OUT1
3.3V/2A
R
SENSE1
0.05Ω
L1
27µH
+
R2
82.5k
1%
16
D1
MBRS320T3
2
100pF
SENSE
1
V
FB1
GND1
3
C
T1
14
I
TH1
15
R
C1
1k
C
C1
C
C2
3300pF 3300pF
I
TH2
7
R
C2
1k
C
T2
300pF
C
T2
6
V
FB2
GND2
11
R1
49.9k
1%
L1, L2: SUMIDA CDRH125-270
P1: SILICONIX Si4953DY/FAIRCHILD NDS8947
R
SENSE1,
R
SENSE2
: DALE WSL-2010-.05
C
T1
300pF
Figure 1. High Efficiency Dual 3.3V/2.5V Regulator
U
12
9
8
10
U
U
+
0.22µF
P1B
L2
27µH
C
IN2
22µF
25V
×
2
R
SENSE2
0.05Ω
V
OUT2
2.5V/2A
1000pF
D2
MBRS320T3
R4
49.9k
1%
+
R3
49.9k
1%
C
OUT2
220µF
10V
×
2
100pF
1143 F01
1

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Description DC/DC Cntrlr Dual-OUT Step Down 400kHz 16-Pin SOIC N DC/DC Cntrlr Dual-OUT Step Down 400kHz 16-Pin SOIC N Tube DC/DC Cntrlr Dual-OUT Step Down 400kHz 16-Pin SOIC N T/R DC/DC Cntrlr Dual-OUT Step Down 400kHz 16-Pin SOIC N DC/DC Cntrlr Dual-OUT Step Down 400kHz 16-Pin SOIC N Tube DC/DC Cntrlr Dual-OUT Step Down 400kHz 16-Pin SOIC N T/R DC/DC Cntrlr Dual-OUT Step Down 400kHz 16-Pin SOIC N Tube DC/DC Cntrlr Dual-OUT Step Down 400kHz 16-Pin SOIC N T/R DC/DC Cntrlr Dual-OUT Step Down 400kHz 16-Pin SOIC N
Is it Rohs certified? incompatible conform to - - conform to conform to conform to conform to incompatible
Maker ADI ADI - - ADI ADI ADI ADI ADI
package instruction 0.150 INCH, PLASTIC, SO-16 SOP, - - SOP-16 SOP, SOP-16 SOP, 0.150 INCH, PLASTIC, SO-16
Reach Compliance Code not_compliant compliant - - compliant compliant compliant compliant not_compliant
Analog Integrated Circuits - Other Types SWITCHING CONTROLLER SWITCHING CONTROLLER - - SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER
control mode CURRENT-MODE CURRENT-MODE - - CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE
Control Technology CONSTANT OFF TIME CONSTANT OFF TIME - - CONSTANT OFF TIME CONSTANT OFF TIME CONSTANT OFF TIME CONSTANT OFF TIME CONSTANT OFF TIME
Maximum input voltage 16 V 16 V - - 16 V 16 V 16 V 16 V 16 V
Minimum input voltage 3.5 V 3.5 V - - 3.5 V 3.5 V 3.5 V 3.5 V 3.5 V
Nominal input voltage 10 V 10 V - - 10 V 10 V 10 V 10 V 10 V
JESD-30 code R-PDSO-G16 R-PDSO-G16 - - R-PDSO-G16 R-PDSO-G16 R-PDSO-G16 R-PDSO-G16 R-PDSO-G16
JESD-609 code e0 e3 - - e3 - e3 - e0
length 9.9 mm 9.9 mm - - 9.9 mm 9.9 mm 9.9 mm 9.9 mm 9.9 mm
Humidity sensitivity level 1 1 - - 1 - 1 - 1
Number of functions 2 2 - - 2 2 2 2 2
Number of terminals 16 16 - - 16 16 16 16 16
Maximum operating temperature 70 °C 70 °C - - 70 °C 70 °C 70 °C 70 °C 70 °C
Package body material PLASTIC/EPOXY PLASTIC/EPOXY - - PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code SOP SOP - - SOP SOP SOP SOP SOP
Package shape RECTANGULAR RECTANGULAR - - RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE SMALL OUTLINE - - SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE
Peak Reflow Temperature (Celsius) 235 260 - - 260 NOT SPECIFIED 260 NOT SPECIFIED 235
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 1.75 mm 1.75 mm 1.75 mm
surface mount YES YES - - YES YES YES YES YES
Switch configuration SINGLE SINGLE - - SINGLE SINGLE SINGLE SINGLE SINGLE
Maximum switching frequency 400 kHz 400 kHz - - 400 kHz 400 kHz 400 kHz 400 kHz 400 kHz
Temperature level COMMERCIAL COMMERCIAL - - COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL
Terminal surface Tin/Lead (Sn/Pb) MATTE TIN - - Matte Tin (Sn) - Matte Tin (Sn) - Tin/Lead (Sn/Pb)
Terminal form GULL WING GULL WING - - GULL WING GULL WING GULL WING GULL WING GULL WING
Terminal pitch 1.27 mm 1.27 mm - - 1.27 mm 1.27 mm 1.27 mm 1.27 mm 1.27 mm
Terminal location DUAL DUAL - - DUAL DUAL DUAL DUAL DUAL
Maximum time at peak reflow temperature 20 30 - - 30 NOT SPECIFIED 30 NOT SPECIFIED 20
width 3.9 mm 3.9 mm - - 3.9 mm 3.9 mm 3.9 mm 3.9 mm 3.9 mm
Base Number Matches 1 1 - - 1 1 1 1 1
Brand Name - Analog Devices Inc - - Analog Devices Inc Analog Devices Inc Analog Devices Inc Analog Devices Inc -
Is it lead-free? - Contains lead - - Contains lead Contains lead Contains lead Contains lead -
Contacts - 16 - - 16 16 16 16 -
Manufacturer packaging code - 05-08-1610 (S16) - - 05-08-1610 (S16) 05-08-1610 (S16) 05-08-1610 (S16) 05-08-1610 (S16) -
technology - CMOS - - CMOS - CMOS CMOS CMOS
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