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SC2672 Datasheet

  • SC2672

  • Dual Synchronous Voltage Mode Controller

  • 9頁

  • SEMTECH   SEMTECH

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Dual Synchronous
Voltage Mode Controller
POWER MANAGEMENT
Description
The SC2672 is a versatile 2 phase, synchronous, volt-
age mode PWM controller that may be used in two dis-
tinct ways. The SC2672 is ideal for dual voltage inde-
pendent applications. The SC2672 features a tempera-
ture compensated voltage reference, an undervoltage
lockout over current protection and internal level-shifted,
high-side drive circuitry.
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擄 out of phase
to minimize input and output ripple.
SC2672
Features
300kHz operating frequency
Soft Start
Power Good output provided
Undervoltage current limit
Phase-shifted switchers minimize ripple
High efficiency operation, >90%
Programmable output(s) as low as .9V
Industrial temperature range
SOIC-16 pin package
Bias voltage as low as 4.5V
Two Independent PWM Controllers
Flexible, same or separate V
IN
Independent control for each channel
Independent and separate output UVLO
2 phases operating opposed for ripple reduction
(if same V
IN
used)
Applications
Graphics cards
Peripheral add-in card
Power supplies requiring two outputs
Typical Application Schematic
Revision: July 15, 2004
1
www.semtech.com

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