SC1218MLTRT SEMTECH [Semtech Corporation], SC1218MLTRT Datasheet

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SC1218MLTRT

Manufacturer Part Number
SC1218MLTRT
Description
High Speed Synchronous MOSFET Driver
Manufacturer
SEMTECH [Semtech Corporation]
Datasheet
1.SC1218MLTRT.pdf (12 pages)
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.
Revision: October 14, 2005
POWER MANAGEMENT
Typical Application Circuit
Description
PWM
VIN
EN
2R2
Rv in
Cv in
1uF
BST
CO
EN
VIN
SC1218
Cbst
1uF
PGND
DRN
BG
TG
1
Applications
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
Intel Next Generation Processor Power Supplies
AMD Athlon
Supplies
High Current Low Voltage DC-DC Converter
Synchronous MOSFET Driver
(optional)
Rdrn
TM
Mbot
Mtop
and AMD-K8
Lout
TM
Processor Power
Cin
High Speed
www.semtech.com
SC1218
Cout
s
VOUT

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SC1218MLTRT Summary of contents

Page 1

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 ...

Page 2

POWER MANAGEMENT Absolute Maximum Ratings Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not implied ...

Page 3

POWER MANAGEMENT Electrical Characteristics (Cont.) Unless specified 25° 12V ...

Page 4

POWER MANAGEMENT Timing Diagrams V V CO_HI CO_HI PDL_BG PDL_BG DRN DRN VIN & EN VIN & EN VIN>UVLO VIN>UVLO & & Rising Edge Transition Rising Edge Transition EN=“HI” EN=“HI” 2005 Semtech ...

Page 5

POWER MANAGEMENT Pin Configuration SOIC-8 Top View BST VIN 4 5 Pin Descriptions ...

Page 6

POWER MANAGEMENT Block Diagram VIN VIN VIN VIN PROTECTION PROTECTION PROTECTION PROTECTION PGND PGND PGND PGND Typical Performance Characteristics Fig Rise and BG ...

Page 7

POWER MANAGEMENT Typical Performance Characteristics (Cont =12V IN C =3.3nF Load TEMPERATURE (°C) Fig and BG Rise Times vs. Temperature =12V IN C =3.3nF Load 10 ...

Page 8

POWER MANAGEMENT Typical Performance Characteristics (Cont.) 4.5 C =10nF LOAD_TG 4.0 C =10nF LOAD_BG T =25°C 3.5 A 3.0 2.5 2.0 1.5 1.0 0.5 0 (V) IN Fig. 9. Peak Sourcing Current vs. Supply ...

Page 9

POWER MANAGEMENT Applications Information THEORY OF OPERA THEOR THEOR THEOR THEOR Y OF OPERATION Y OF OPERA Y OF OPERA Y OF OPERA TION TION TION TION The SC1218 is a high speed, robust, dual output driver designed to drive ...

Page 10

POWER MANAGEMENT Applications Information (Cont.) Typically, a 1uF/16V ceramic capacitor is used. In addi- tion, a small resistor (one ohm) is recommended in be- tween DRN pin of the SC1218 and the phase node. The resistor is used to alleviate ...

Page 11

POWER MANAGEMENT Outline Drawing - SOIC-8 2X E/2 ccc C 2X N/2 TIPS aaa C SEATING PLANE C SIDE VIEW NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. DATUMS -A- AND 3. DIMENSIONS "E1" AND "D" DO ...

Page 12

POWER MANAGEMENT Outline Drawing - MLPQ- 3mm A Top View PIN 1 INDICATOR (LASER MARK aaa C A1 e/2 Bottom View D/2 Land Pattern - MLPQ- 3mm K (C) ...

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