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LTC1574CS

Description
Switching Voltage Regulators LTC1574 - High Efficiency Step-Down DC/DC Converters with Internal Schottky Diode
CategoryPower/power management    The power supply circuit   
File Size175KB,8 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric Compare View All

LTC1574CS Overview

Switching Voltage Regulators LTC1574 - High Efficiency Step-Down DC/DC Converters with Internal Schottky Diode

LTC1574CS Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerADI
package instruction0.150 INCH, PLASTIC, SO-16
Reach Compliance Codenot_compliant
ECCN codeEAR99
Is SamacsysN
Analog Integrated Circuits - Other TypesSWITCHING REGULATOR
control modeCURRENT-MODE
Control TechnologyCONSTANT OFF TIME
Maximum input voltage16 V
Minimum input voltage4 V
Nominal input voltage9 V
JESD-30 codeR-PDSO-G16
JESD-609 codee0
length9.9 mm
Humidity sensitivity level1
Number of functions1
Number of terminals16
Maximum operating temperature70 °C
Minimum operating temperature
Maximum output current1 A
Nominal output voltage1.25 V
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)235
Certification statusNot Qualified
Maximum seat height1.75 mm
Maximum supply current (Isup)0.6 mA
surface mountYES
Switch configurationBUCK
Maximum switching frequency200 kHz
technologyCMOS
Temperature levelCOMMERCIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperature20
width3.899 mm
Base Number Matches1
LTC1574
LTC1574-3.3/LTC1574-5
High Efficiency Step-Down
DC/DC Converters
with Internal Schottky Diode
FEATURES
s
s
s
s
s
s
s
s
s
s
s
s
s
DESCRIPTIO
High Efficiency: Up to 94%
Usable in Noise-Sensitive Products
Peak Inductor Current Independent of Inductor Value
Short-Circuit Protection
Internal Low Forward Drop Schottky Diode
Only Three External Components Required
Wide V
IN
Range: 4V to 18.5V (Absolute Maximum)
Low Dropout Operation
Low-Battery Detector
Pin Selectable Current Limit
Internal 0.9Ω Power Switch: V
IN
< 11V
Standby Current: 130µA
Active Low Micropower Shutdown
The LTC
®
1574 is a family of easy-to-use current mode
DC/DC converters ideally suited for 9V to 5V, 5V to 3.3V
and inverting operation. With an internal 0.9Ω switch (at
a supply voltage of 12V) and a low forward drop Schottky
diode (0.450V typ at 200mA, T
A
= 25°C), the LTC1574
requires only three external components to construct a
complete high efficiency DC/DC converter.
Under no load condition, the LTC1574 draws only 130µA.
In shutdown, it draws a mere 2µA making this converter
ideal for battery-powered applications. In dropout, the
internal P-channel MOSFET switch is turned on continu-
ously allowing the user to maximize the life of the battery
source.
The maximum inductor current of the LTC1574 family is
pin selectable to either 340mA or 600mA, optimizing
efficiency for a wide range of applications. Operation up to
200kHz permits the use of small surface mount inductors
and capacitors.
For applications requiring higher output current or ultra-
high efficiency, see the LTC1148 or LTC1265 data sheets.
For detailed applications information, see the LTC1174
data sheet.
APPLICATIO S
s
s
s
s
s
s
Inverting Converters
Step-Down Converters
Memory Backup Supply
Portable Instruments
Battery-Powered Equipment
Distributed Power Systems
and LTC are registered trademarks and LT is a trademark of Linear Technology Corporation.
TYPICAL APPLICATIO
V
IN
5.5V to
16V
12
11
6
High Efficiency Step-Down Converter
LTC1574-5 Efficiency
100
95
L = 100µH
V
OUT
= 5V
I
PGM
= 0V
V
IN
= 6V
5
V
IN
LB
IN
LTC1574-5
LB
OUT
I
PGM
GND
2, 4, 13, 15
V
OUT
SW
SHDN
7
10
3, 14
100µH
+
EFFICIENCY (%)
22µF*
35V
90
V
IN
= 9V
85
80
75
70
+
5V
175mA
100µF*
10V
1574 TA01
* AVX TPSD226K035
** AVX TPSD107K010
COILTRONICS CTX100-4
1
U
10
LOAD CURRENT (mA)
100 200
1574 TA02
U
U
1

LTC1574CS Related Products

LTC1574CS LTC1574CS-3.3#TR LTC1574CS#TRPBF LTC1574CS-5#PBF LTC1574CS-3.3 LTC1574CS#TR LTC1574CS-3.3#TRPBF
Description Switching Voltage Regulators LTC1574 - High Efficiency Step-Down DC/DC Converters with Internal Schottky Diode Switching Voltage Regulators LTC1574 - High Efficiency Step-Down DC/DC Converters with Internal Schottky Diode Switching Voltage Regulators Adj CMOS Stepdn 425mA,DC/DC Converter Switching Voltage Regulators 5V CMOS Stepdn 425mA,DC/DC Converter Switching Voltage Regulators LTC1574 - High Efficiency Step-Down DC/DC Converters with Internal Schottky Diode Switching Regulator LTC1574 - High Efficiency Step-Down DC/DC Converters with Internal Schottky Diode Switching Regulator 3.3V CMOS Stepdn 425mA,DC/DC Converter
Is it Rohs certified? incompatible incompatible conform to conform to incompatible incompatible conform to
Maker ADI ADI ADI ADI ADI ADI ADI
package instruction 0.150 INCH, PLASTIC, SO-16 SOP, SOP, SOP, 0.150 INCH, PLASTIC, SO-16 SOP, SOP,
Reach Compliance Code not_compliant not_compliant compliant compliant not_compliant not_compliant compliant
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 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 4 V 4 V 4 V 4 V 4 V 4 V 4 V
Nominal input voltage 9 V 9 V 9 V 9 V 9 V 9 V 9 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 e0 e3 e3 e0 e0 e3
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 1 1
Number of functions 1 1 1 1 1 1 1
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
Maximum output current 1 A 1 A 1 A 1 A 1 A 1 A 1 A
Nominal output voltage 1.25 V 3.3 V 1.25 V 5 V 3.3 V 1.25 V 3.3 V
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) 235 235 260 260 235 235 260
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
Maximum supply current (Isup) 0.6 mA 0.6 mA 0.6 mA 0.6 mA 0.6 mA 0.6 mA 0.6 mA
surface mount YES YES YES YES YES YES YES
Switch configuration BUCK BUCK BUCK BUCK BUCK BUCK BUCK
Maximum switching frequency 200 kHz 200 kHz 200 kHz 200 kHz 200 kHz 200 kHz 200 kHz
technology CMOS CMOS CMOS CMOS CMOS CMOS CMOS
Temperature level COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL
Terminal surface Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Matte Tin (Sn) Matte Tin (Sn) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin (Sn)
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 20 30 30 20 20 30
width 3.899 mm 3.899 mm 3.899 mm 3.899 mm 3.899 mm 3.899 mm 3.899 mm
ECCN code EAR99 EAR99 - - EAR99 EAR99 -
Is Samacsys N - - N N - N
Base Number Matches 1 - - 1 1 - 1
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