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LTC1143LCS#TR

Description
IC reg ctrlr buck pwm CM 16-soic
Categorysemiconductor    Power management   
File Size307KB,20 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet Parametric Compare View All

LTC1143LCS#TR Overview

IC reg ctrlr buck pwm CM 16-soic

LTC1143LCS#TR Parametric

Parameter NameAttribute value
Datasheets
LTC1143/L/L-ADJ
Product Photos
16 SOIC
Standard Package2,500
CategoryIntegrated Circuits (ICs)
FamilyPMIC - Voltage Regulators - DC DC Switching Controllers
PackagingTape & Reel (TR)
PWM TypeCurrent Mode
Number of Outputs2
Frequency - Max400kHz
Duty Cycle100%
Voltage - Supply3.5 V ~ 16 V
BuckYes
BoosN
FlybackN
InvertingN
DoubleN
DivideN
CukN
IsolatedN
Operating Temperature0°C ~ 70°C
Package / Case16-SOIC (0.154", 3.90mm Width)
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

LTC1143LCS#TR Related Products

LTC1143LCS#TR LTC1143CS#TR LTC1143LCS-ADJ#TR LTC1143CS#PBF LTC1143LCS#TRPBF LTC1143LCS#PBF LTC1143LCS-ADJ#TRPBF LTC1143LCS-ADJ#PBF LTC1143CS#TRPBF
Description IC reg ctrlr buck pwm CM 16-soic IC reg ctrlr buck pwm CM 16-soic IC reg ctrlr buck pwm CM 16-soic IC REG CTRLR BUCK/BCK-BST 16SOIC IC REG CTRLR BUCK/BCK-BST 16SOIC IC REG CTRLR BUCK/BCK-BST 16SOIC IC REG CTRLR BUCK/BCK-BST 16SOIC IC REG CTRLR BUCK/BCK-BST 16SOIC IC REG CTRLR BUCK/BCK-BST 16SOIC
Brand Name - - - Linear Technology Linear Technology Linear Technology Linear Technology Linear Technology -
Is it Rohs certified? - - - conform to conform to conform to conform to conform to -
Maker - - - Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) -
Parts packaging code - - - SOIC SOIC SOIC SOIC SOIC -
package instruction - - - SOP, SOP, SOP, SOP16,.25 SOP, SOP, SOP16,.25 -
Contacts - - - 16 16 16 16 16 -
Manufacturer packaging code - - - S S S S S -
Reach Compliance Code - - - compliant compliant compliant compliant compliant -
ECCN code - - - EAR99 EAR99 EAR99 EAR99 EAR99 -
Analog Integrated Circuits - Other Types - - - SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER -
control 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 -
Maximum input voltage - - - 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 -
Nominal input voltage - - - 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 -
length - - - 9.9 mm 9.9 mm 9.9 mm 9.9 mm 9.9 mm -
Number of functions - - - 2 2 2 2 2 -
Number of terminals - - - 16 16 16 16 16 -
Maximum operating temperature - - - 70 °C 70 °C 70 °C 70 °C 70 °C -
Package body material - - - PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY -
encapsulated code - - - SOP SOP SOP SOP SOP -
Package shape - - - RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR -
Package form - - - SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE -
Peak Reflow Temperature (Celsius) - - - 260 NOT SPECIFIED 260 NOT SPECIFIED 260 -
Certification status - - - 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 -
surface mount - - - YES YES YES YES YES -
Switch configuration - - - SINGLE SINGLE SINGLE SINGLE SINGLE -
Maximum switching frequency - - - 400 kHz 400 kHz 400 kHz 400 kHz 400 kHz -
Temperature level - - - COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL -
Terminal form - - - 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 -
Terminal location - - - DUAL DUAL DUAL DUAL DUAL -
Maximum time at peak reflow temperature - - - 30 NOT SPECIFIED 30 NOT SPECIFIED 30 -
width - - - 3.9 mm 3.9 mm 3.9 mm 3.9 mm 3.9 mm -
Base Number Matches - - - 1 1 1 1 1 -
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