SC1218 Datasheet, PDF (1/12 Pages) Semtech Corporation – High Speed Synchronous MOSFET Driver

POWER MANAGEMENT
Description
The SC1218 is a high speed, robust, dual output driver to
drive high-side and low-side N-MOSFETs in synchronous
buck converters. Combined with Semtech’s multi-phase
PWM controller SC2649, one can build high performance,
versatile voltage regulators for next generation micropro-
cessors.
SC1218 is built upon a CMOS technology which provides
enough voltage capacity to handle computer applications.
In addition, the advanced timing circuitry is adopted to
filter out very narrow PWM pulses at the input of the driver.
The latched UVLO and enhanced adaptive shoot-through
protection further enhance the robustness of the SC1218.
With integrated bootstrap diode, the SC1218 is offered in
both SOIC-8 package and MLPQ-8 3x3mm package. These
features further reduce the thermal stress and BOM cost.
SC1218
High Speed
Synchronous MOSFET Driver
Features
‹ Advanced Digital Timing to Filter Out Very Narrow PWM
Pulses
‹ +12V Gate Drive Voltage
‹ Integrated Bootstrap Diode
‹ High Peak Drive Current
‹ Adaptive Non-overlapping Gate Drives Provide Shoot-
through Protection
‹ Support Dynamic VID operation
‹ Ultra-low Propagation Delay
‹ Floating Top Gate Drive
‹ Crowbar Function for Over Voltage Protection
‹ High Frequency (up to 2 MHz) Operation Allows Use of
Small Inductors and Low Cost Ceramic Capacitors
‹ Under Voltage Lockout
‹ Low Quiescent Current
‹ Enable Function for Both Gate OFF Shut Down
‹ Lead-free Part and Fully WEEE and RoHS Compliant
Typical Application Circuit
Applications
‹ Intel^ Next Generation Processor Power Supplies
‹ AMD^ Athlon^TM and AMD-K8^TM Processor Power
Supplies
‹ High Current Low Voltage DC-DC Converters
VIN
PWM
EN
Rv in
2R2
Cbst
1uF
BST
TG
CO
DRN
EN PGND
VIN
BG
Cv in SC1218
1uF
Mtop
Cin
Rdrn
Lout
(optional)
Mbot
VOUT
Cout
Revision: October 14, 2005
1
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