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LT1576CS8-SYNC#TR

Description
Switching Voltage Regulators LT1576 - 1.5A, 200kHz Step-Down Switching Regulator
CategoryPower/power management    The power supply circuit   
File Size292KB,28 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric Compare View All

LT1576CS8-SYNC#TR Overview

Switching Voltage Regulators LT1576 - 1.5A, 200kHz Step-Down Switching Regulator

LT1576CS8-SYNC#TR Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerADI
package instructionSOP-8
Reach Compliance Codenot_compliant
Analog Integrated Circuits - Other TypesSWITCHING REGULATOR
control modeCURRENT-MODE
Maximum input voltage25 V
Minimum input voltage5 V
Nominal input voltage15 V
JESD-30 codeR-PDSO-G8
JESD-609 codee0
length4.9025 mm
Number of functions1
Number of terminals8
Maximum operating temperature125 °C
Minimum operating temperature
Maximum output current3.5 A
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Encapsulate equivalent codeSOP8,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Maximum seat height1.752 mm
surface mountYES
Switch configurationBUCK
Maximum switching frequency240 kHz
technologyBIPOLAR
Temperature levelOTHER
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
width3.899 mm
LT1576/LT1576-5
1.5A, 200kHz Step-Down
Switching Regulator
FEATURES
s
s
s
s
s
s
s
s
s
s
s
DESCRIPTIO
Constant 200kHz Switching Frequency
1.21V Reference Voltage
Fixed 5V Output Option
Easily Synchronizable
Uses All Surface Mount Components
Inductor Size Reduced to 15
µ
H
Saturating Switch Design: 0.2Ω
Effective Supply Current: 1.16mA
Shutdown Current: 20µA
Cycle-by-Cycle Current Limiting
Fused Lead SO-8 Package
The LT
®
1576 is a 200kHz monolithic buck mode switching
regulator. A 1.5A switch is included on the die along with
all the necessary oscillator, control and logic circuitry. The
topology is current mode for fast transient response and
good loop stability. The LT1576 is a modified version of the
industry standard LT1376 optimized for noise sensitive
applications.
In addition, the reference voltage has been lowered to
allow the device to produce output voltages down to 1.2V.
Quiescent current has been reduced by a factor of two.
Switch on resistance has been reduced by 30%. Switch tran-
sition times have been slowed to reduce EMI generation.
The oscillator frequency has been reduced to 200kHz to
maintain high efficiency over a wide output current range.
The pinout has been changed to improve PC layout by
allowing the high current high frequency switching cir-
cuitry to be easily isolated from low current noise sensitive
control circuitry. The new SO-8 package includes a fused
ground lead which significantly reduces the thermal resis-
tance of the device to extend the ambient operating tem-
perature range. There is an optional function of shutdown
or synchronization. Standard surface mount external parts
can be used including the inductor and capacitors.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
s
s
s
s
Portable Computers
Battery-Powered Systems
Battery Charger
Distributed Power
TYPICAL APPLICATION
Efficiency vs Load Current
5V Buck Converter
INPUT
6V TO 25V
C3*
10µF TO
50µF
100
95
EFFICIENCY (%)
90
85
80
75
70
V
OUT
= 5V
V
IN
= 10V
L = 33µH
+
V
IN
BOOST
C2
0.33µF
V
SW
L1**
15µH
D2
1N914
OUTPUT**
5V, 1.25A
LT1576
OPEN = ON
SHDN
GND
V
C
BIAS
FB
D1
1N5818
C
C
100pF
R1
15.8k
R2
4.99k
* RIPPLE CURRENT RATING
I
OUT
/2
** INCREASE L1 TO 30µH FOR LOAD
CURRENTS ABOVE 0.6A AND TO
60µH ABOVE 1A
SEE APPLICATIONS INFORMATION
+
C1
100µF, 10V
SOLID
TANTALUM
1576 TA01
U
0
0.25
0.50 0.75 1.00
LOAD CURRENT (A)
1.25
1.50
1576 TA02
U
U
1

LT1576CS8-SYNC#TR Related Products

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Description Switching Voltage Regulators LT1576 - 1.5A, 200kHz Step-Down Switching Regulator Switching Voltage Regulators 1.5A, 200KHz Stepdn Sw Reg Switching Voltage Regulators 1.5A, 200KHz Stepdn Reg,5V Out Switching Voltage Regulators 1.5A, 200KHz Stepdn Reg,5V Out Switching Voltage Regulators 1.5A, 200KHz Stepdn Sw Reg Switching Voltage Regulators 1.5A, 200KHz Stepdn Sw Reg Switching Voltage Regulators LT1576 - 1.5A, 200kHz Step-Down Switching Regulator Switching Voltage Regulators 1.5A, 200KHz Stepdn Sw Reg Switching Voltage Regulators LT1576 - 1.5A, 200kHz Step-Down Switching Regulator Switching Regulator LT1576 - 1.5A, 200kHz Step-Down Switching Regulator
Maker ADI ADI ADI ADI ADI ADI ADI ADI ADI ADI
package instruction SOP-8 SOP-8 SOP, SOP8,.25 SOP, SOP8,.25 SOP, SOP, SOP8,.25 SOP, SOP, SOP8,.25 SOP-8 SOP, SOP8,.25
Reach Compliance Code not_compliant compliant compliant compliant compliant compliant not_compliant compliant not_compliant compliant
Analog Integrated Circuits - Other Types SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR 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 CURRENT-MODE CURRENT-MODE CURRENT-MODE
Maximum input voltage 25 V 25 V 25 V 25 V 25 V 25 V 25 V 25 V 25 V 25 V
Minimum input voltage 5 V 5 V 5 V 5 V 6 V 5 V 6 V 5 V 5 V 5 V
Nominal input voltage 15 V 15 V 15 V 15 V 15 V 15 V 15 V 15 V 15 V 15 V
JESD-30 code R-PDSO-G8 R-PDSO-G8 R-PDSO-G8 R-PDSO-G8 R-PDSO-G8 R-PDSO-G8 R-PDSO-G8 R-PDSO-G8 R-PDSO-G8 R-PDSO-G8
length 4.9025 mm 4.9025 mm 4.9025 mm 4.9025 mm 4.9025 mm 4.9025 mm 4.9025 mm 4.9025 mm 4.9025 mm 4.9025 mm
Number of functions 1 1 1 1 1 1 1 1 1 1
Number of terminals 8 8 8 8 8 8 8 8 8 8
Maximum output current 3.5 A 3.5 A 3.5 A 3.5 A 3.5 A 3.5 A 3.5 A 3.5 A 3.5 A 3.5 A
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code SOP SOP SOP SOP SOP SOP SOP SOP SOP SOP
Package shape RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE
Maximum seat height 1.752 mm 1.752 mm 1.752 mm 1.752 mm 1.752 mm 1.752 mm 1.752 mm 1.752 mm 1.752 mm 1.752 mm
surface mount YES YES YES YES YES YES YES YES YES YES
Switch configuration BUCK BUCK BUCK BUCK BUCK BUCK BUCK BUCK BUCK BUCK
Maximum switching frequency 240 kHz 240 kHz 240 kHz 240 kHz 240 kHz 240 kHz 240 kHz 240 kHz 240 kHz 240 kHz
Terminal form GULL WING GULL WING GULL WING 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 1.27 mm 1.27 mm 1.27 mm
Terminal location DUAL DUAL DUAL DUAL DUAL DUAL DUAL DUAL DUAL DUAL
width 3.899 mm 3.899 mm 3.899 mm 3.899 mm 3.899 mm 3.899 mm 3.899 mm 3.899 mm 3.899 mm 3.899 mm
Is it Rohs certified? incompatible conform to conform to conform to conform to conform to incompatible conform to incompatible -
JESD-609 code e0 e3 e3 e3 e3 e3 e0 e3 e0 -
Maximum operating temperature 125 °C 125 °C 125 °C 125 °C - 125 °C - 125 °C 125 °C 125 °C
Encapsulate equivalent code SOP8,.25 SOP8,.25 SOP8,.25 SOP8,.25 - SOP8,.25 - SOP8,.25 SOP8,.25 SOP8,.25
technology BIPOLAR BIPOLAR BIPOLAR BIPOLAR BIPOLAR BIPOLAR - BIPOLAR BIPOLAR BIPOLAR
Temperature level OTHER OTHER AUTOMOTIVE OTHER - AUTOMOTIVE - AUTOMOTIVE AUTOMOTIVE OTHER
Terminal surface Tin/Lead (Sn/Pb) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Tin/Lead (Sn/Pb) Matte Tin (Sn) Tin/Lead (Sn/Pb) -
Brand Name - Analog Devices Inc 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 - Contains lead - -
Contacts - 8 8 8 8 8 - 8 - -
Manufacturer packaging code - 05-08-1610 (S8) 05-08-1610 (S8) 05-08-1610 (S8) 05-08-1610 (S8) 05-08-1610 (S8) - 05-08-1610 (S8) - -
Is Samacsys - N N N N N - N N -
Humidity sensitivity level - 1 1 1 1 1 1 1 1 -
Peak Reflow Temperature (Celsius) - 260 260 - NOT SPECIFIED 260 235 - 235 -
Certification status - Not Qualified Not Qualified - Not Qualified Not Qualified Not Qualified - Not Qualified -
Maximum time at peak reflow temperature - 30 30 - NOT SPECIFIED 30 20 - 20 -
Base Number Matches - 1 1 1 1 1 - 1 1 -
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