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SC1176CSWTR

Description
SWITCHING CONTROLLER, 330 kHz SWITCHING FREQ-MAX, PDSO20
CategoryPower/power management    The power supply circuit   
File Size595KB,23 Pages
ManufacturerSEMTECH
Websitehttp://www.semtech.com
Download Datasheet Parametric Compare View All

SC1176CSWTR Overview

SWITCHING CONTROLLER, 330 kHz SWITCHING FREQ-MAX, PDSO20

SC1176CSWTR Parametric

Parameter NameAttribute value
Is it lead-free?Contains lead
Is it Rohs certified?incompatible
MakerSEMTECH
Parts packaging codeSOIC
package instructionSOP, SOP20,.4
Contacts20
Reach Compliance Codeunknow
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeVOLTAGE-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage15 V
Minimum input voltage4.2 V
Nominal input voltage5 V
JESD-30 codeR-PDSO-G20
JESD-609 codee0
length12.8 mm
Number of functions1
Number of terminals20
Maximum operating temperature70 °C
Minimum operating temperature
Maximum output current15 A
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Encapsulate equivalent codeSOP20,.4
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)NOT SPECIFIED
Certification statusNot Qualified
Maximum seat height2.65 mm
surface mountYES
Switch configurationPHASE-SHIFT
Maximum switching frequency330 kHz
Temperature levelCOMMERCIAL
Terminal surfaceTIN LEAD
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width7.5 mm
Base Number Matches1
Dual Synchronous Voltage Mode
Controller with Current Sharing Circuitry
POWER MANAGEMENT
Description
The SC1176 is a versatile 2 phase, synchronous, volt-
age mode PWM controller that may be used in two dis-
tinct ways. First, the SC1176 is ideal for applications
where point of use output power exceeds any single in-
put power budget. Alternatively, the SC1176 can be used
as a dual switcher. The SC1176 features a temperature
compensated voltage reference, over current protection
with 50% fold-back and internal level-shifted, high-side
drive circuitry.
In current sharing configuration, the SC1176 can pro-
duce a single output voltage from two separate voltage
sources (which can be different voltage levels) while
maintaining current sharing between the channels. Cur-
rent sharing is programmable to allow loading each input
supply as required by the application.
In dual switcher configuration, two feedback paths are
provided for independent control of the separate out-
puts. The device will provide a regulated output from
flexibly configured inputs (3.3V, 5V, 12V), provided 5V is
present for V
CC
. The two switchers are 180° out of phase
to minimize input and output ripple.
The SC1176A has the phases of the Master and the Slave
inverted.
It offers a different pattern for ripple cancellation and
prevents phase fold back during current limit.
The two chips are pin compatible.
SC1176/SC1176A
Features
300kHz fixed frequency operation
Soft Start and Enable function
Power Good output provided
Over current protection with 50% fold-back
Phase-shifted switchers minimize ripple
High efficiency operation, >90%
Programmable output(s) as low as .9V
Industrial temperature range
SOIC-20 or TSSOP-20 pin Lead free package. This
product is fully WEEE and RoHS compliant
Two Phase, Current Sharing Controller
Flexible, same or separate V
IN
Programmable current sharing
Combined current limit with fold-back
2 phases operating opposed for ripple reduction
Thermal distribution via multi-phase output
Two Independent PWM Controllers
Flexible, same or separate V
IN
Independent control for each channel
Independent and separate current limit
2 phases operating opposed for ripple reduction (if
same V
IN
used)
Applications
Graphics cards
DDR Memory
Peripheral add-in card
SSTL Termination
Dual-Phase power supply
Power supplies requiring two outputs
Revision: June 29, 2006
1
www.semtech.com

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Is it lead-free? Contains lead Contains lead - Contains lead - Contains lead -
Is it Rohs certified? incompatible incompatible - incompatible - incompatible -
Parts packaging code SOIC SOIC - TSSOP - TSSOP -
package instruction SOP, SOP20,.4 MS-013AC, SOIC-20 - MO-153AC, TSSOP-20 - TSSOP, TSSOP20,.25 -
Contacts 20 20 - 20 - 20 -
Reach Compliance Code unknow unknow - unknow - unknow -
ECCN code EAR99 EAR99 - EAR99 - EAR99 -
Analog Integrated Circuits - Other Types SWITCHING CONTROLLER SWITCHING CONTROLLER - SWITCHING CONTROLLER - SWITCHING CONTROLLER -
control mode VOLTAGE-MODE VOLTAGE-MODE - VOLTAGE-MODE - VOLTAGE-MODE -
Control Technology PULSE WIDTH MODULATION PULSE WIDTH MODULATION - PULSE WIDTH MODULATION - PULSE WIDTH MODULATION -
Maximum input voltage 15 V 15 V - 15 V - 15 V -
Minimum input voltage 4.2 V 4.2 V - 4.2 V - 4.2 V -
Nominal input voltage 5 V 5 V - 5 V - 5 V -
JESD-30 code R-PDSO-G20 R-PDSO-G20 - R-PDSO-G20 - R-PDSO-G20 -
JESD-609 code e0 e0 - e0 - e0 -
length 12.8 mm 12.8 mm - 6.5 mm - 6.5 mm -
Number of functions 1 1 - 1 - 1 -
Number of terminals 20 20 - 20 - 20 -
Maximum operating temperature 70 °C 70 °C - 70 °C - 70 °C -
Maximum output current 15 A 15 A - 15 A - 15 A -
Package body material PLASTIC/EPOXY PLASTIC/EPOXY - PLASTIC/EPOXY - PLASTIC/EPOXY -
encapsulated code SOP SOP - TSSOP - TSSOP -
Encapsulate equivalent code SOP20,.4 SOP20,.4 - TSSOP20,.25 - TSSOP20,.25 -
Package shape RECTANGULAR RECTANGULAR - RECTANGULAR - RECTANGULAR -
Package form SMALL OUTLINE SMALL OUTLINE - SMALL OUTLINE, THIN PROFILE, SHRINK PITCH - SMALL OUTLINE, THIN PROFILE, SHRINK PITCH -
Peak Reflow Temperature (Celsius) NOT SPECIFIED NOT SPECIFIED - NOT SPECIFIED - NOT SPECIFIED -
Certification status Not Qualified Not Qualified - Not Qualified - Not Qualified -
Maximum seat height 2.65 mm 2.65 mm - 1.2 mm - 1.2 mm -
surface mount YES YES - YES - YES -
Switch configuration PHASE-SHIFT PHASE-SHIFT - PHASE-SHIFT - PHASE-SHIFT -
Maximum switching frequency 330 kHz 330 kHz - 330 kHz - 330 kHz -
Temperature level COMMERCIAL COMMERCIAL - COMMERCIAL - COMMERCIAL -
Terminal surface TIN LEAD TIN LEAD - TIN LEAD - TIN LEAD -
Terminal form GULL WING GULL WING - GULL WING - GULL WING -
Terminal pitch 1.27 mm 1.27 mm - 0.65 mm - 0.65 mm -
Terminal location DUAL DUAL - DUAL - DUAL -
Maximum time at peak reflow temperature NOT SPECIFIED NOT SPECIFIED - NOT SPECIFIED - NOT SPECIFIED -
width 7.5 mm 7.5 mm - 4.4 mm - 4.4 mm -
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