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SC1175TS.TR

Description
Low Power Dual Synchronous DC/DC Controller With Current Sharing Circuitry
CategoryPower/power management    The power supply circuit   
File Size372KB,23 Pages
ManufacturerSEMTECH
Websitehttp://www.semtech.com
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SC1175TS.TR Overview

Low Power Dual Synchronous DC/DC Controller With Current Sharing Circuitry

SC1175TS.TR Parametric

Parameter NameAttribute value
Is it lead-free?Contains lead
Is it Rohs certified?incompatible
MakerSEMTECH
Parts packaging codeTSSOP
package instructionTSSOP, TSSOP20,.25
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
length6.5 mm
Number of functions1
Number of terminals20
Maximum operating temperature85 °C
Minimum operating temperature
Maximum output current15 A
Package body materialPLASTIC/EPOXY
encapsulated codeTSSOP
Encapsulate equivalent codeTSSOP20,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)NOT SPECIFIED
Certification statusNot Qualified
Maximum seat height1.2 mm
surface mountYES
Switch configurationPHASE-SHIFT
Maximum switching frequency330 kHz
Temperature levelOTHER
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch0.65 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width4.4 mm
Low Power Dual Synchronous DC/DC
Controller With Current Sharing Circuitry
POWER MANAGEMENT
Description
The SC1175 is a versatile 2 phase, synchronous, volt-
age mode PWM controller that may be used in two dis-
tinct ways. First, the SC1175 is ideal for applications
where point of use output power exceeds any single in-
put power budget. Alternatively, the SC1175 can be used
as a dual switcher. The SC1175 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 SC1175 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.
SC1175
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 1.25V
Industrial temperature range
20 pin SOIC or TSSOP package
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: September 22, 2004
1
www.semtech.com

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