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PDF ISL6208B Data sheet ( Hoja de datos )
| Número de pieza | ISL6208B | |
| Descripción | High Voltage Synchronous Rectified Buck MOSFET Driver | |
| Fabricantes | Intersil | |
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High Voltage Synchronous Rectified Buck MOSFET
Drivers
ISL6208, ISL6208B
The ISL6208 and ISL6208B are high frequency, dual MOSFET
drivers, optimized to drive two N-Channel power MOSFETs in a
synchronous-rectified buck converter topology. They are
especially suited for mobile computing applications that
require high efficiency and excellent thermal performance.
These drivers, combined with an Intersil multiphase Buck
PWM controller, form a complete single-stage core-voltage
regulator solution for advanced mobile microprocessors.
ISL6208 and ISL6208B have the same function but different
packages. The descriptions in this datasheet are based on
ISL6208 and also apply to ISL6208B.
The ISL6208 features 4A typical sinking current for the lower
gate driver. This current is capable of holding the lower
MOSFET gate off during the rising edge of the Phase node. This
prevents shoot-through power loss caused by the high dv/dt of
phase voltages. The operating voltage matches the 30V
breakdown voltage of the MOSFETs commonly used in mobile
computer power supplies.
The ISL6208 also features a three-state PWM input that,
working together with Intersil’s multiphase PWM controllers,
will prevent negative voltage output during CPU shutdown. This
feature eliminates a protective Schottky diode usually seen in
a microprocessor power systems.
MOSFET gates can be efficiently switched up to 2MHz using
the ISL6208. Each driver is capable of driving a 3000pF load
with propagation delays of 8ns and transition times under
10ns. Bootstrapping is implemented with an internal Schottky
diode. This reduces system cost and complexity, while allowing
the use of higher performance MOSFETs. Adaptive
shoot-through protection is integrated to prevent both
MOSFETs from conducting simultaneously.
A diode emulation feature is integrated in the ISL6208 to
enhance converter efficiency at light load conditions. This
feature also allows for monotonic start-up into pre-biased
outputs. When diode emulation is enabled, the driver will allow
discontinuous conduction mode by detecting when the
inductor current reaches zero and subsequently turning off the
low side MOSFET gate.
Features
• Dual MOSFET drives for synchronous rectified bridge
• Adaptive shoot-through protection
• 0.5 On-resistance and 4A sink current capability
• Supports high switching frequency up to 2MHz
- Fast output rise and fall time
- Low propagation delay
• Three-state PWM input for power stage shutdown
• Internal bootstrap schottky diode
• Low bias supply current (5V, 80µA)
• Diode emulation for enhanced light load efficiency and pre-
biased start-up applications
• VCC POR (power-on-reset) feature integrated
• Low three-state shutdown holdoff time (typical 160ns)
• Pin-to-pin compatible with ISL6207
• QFN and DFN package:
- Compliant to JEDEC PUB95 MO-220
QFN - Quad flat no leads - package outline
DFN - Dual flat no leads - package outline
- Near chip scale package footprint, which improves PCB
efficiency and has a thinner profile
• Pb-free (RoHS compliant)
Applications
• Core voltage supplies for Intel® and AMD® mobile
microprocessors
• High frequency low profile DC/DC converters
• High current low output voltage DC/DC converters
• High input voltage DC/DC converters
Related Literature
• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
• Technical Brief TB389 “PCB Land Pattern Design and
Surface Mount Guidelines for MLFP Packages”
• Technical Brief TB447 “Guidelines for Preventing
Boot-to-Phase Stress on Half-Bridge MOSFET Driver ICs”
July 14, 2014
FN9115.7
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2004-2008, 2011, 2012, 2014. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL6208, ISL6208B
Typical Application with 2-Phase Converter
+5V
PGOOD
VID
+5V
FB COMP
VCC
VSEN
PWM1
PWM2
FCCM
MAIN
CONTROL
ISEN1
ISEN2
FS DACOUT
GND
+5V
VCC
BOOT
FCCM
PWM
DRIVE
ISL6208
UGATE
PHASE
THERMAL LGATE
PAD
VBAT
+5V
VCC
FCCM
BOOT
UGATE
PWM DRIVE PHASE
ISL6208
THERMAL LGATE
PAD
VBAT
+VCORE
Submit Document Feedback
5
FN9115.7
July 14, 2014
5 Page 
ISL6208, ISL6208B
Package Outline Drawing
L8.3x3
8 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE
Rev 2, 3/07
3.00 A
B
6
PIN 1
INDEX AREA
7
6
5
4X 0.65
8
6
PIN #1 INDEX AREA
1
1 .10 ± 0 . 15
2
(4X) 0.15
TOP VIEW
4 3 0.10 M C A B
8X 0.60 ± 0.15
4 8X 0.28 ± 0.05
BOTTOM VIEW
SEE DETAIL "X"
( 2. 60 TYP )
( 1. 10 )
( 4X 0 . 65 )
0 . 90 ± 0.1
SIDE VIEW
0.10 C
BASE PLANE
C
SEATING PLANE
0.08 C
( 8X 0 . 28 )
( 8X 0 . 80)
TYPICAL RECOMMENDED LAND PATTERN
C
0 . 2 REF
5
0 . 00 MIN.
0 . 05 MAX.
DETAIL "X"
NOTES:
1. Dimensions are in millimeters.
Dimensions in ( ) for Reference Only.
2. Dimensioning and tolerancing conform to AMSE Y14.5m-1994.
3. Unless otherwise specified, tolerance : Decimal ± 0.05
4. Dimension b applies to the metallized terminal and is measured
between 0.15mm and 0.30mm from the terminal tip.
5. Tiebar shown (if present) is a non-functional feature.
6. The configuration of the pin #1 identifier is optional, but must be
located within the zone indicated. The pin #1 indentifier may be
either a mold or mark feature.
Submit Document Feedback 11
FN9115.7
July 14, 2014
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet ISL6208B.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| ISL6208 | High Voltage Synchronous Rectified Buck MOSFET Driver |  Intersil Corporation |
| ISL6208A | High Voltage Synchronous Rectified Buck MOSFET Driver | Intersil Corporation |
| ISL6208B | High Voltage Synchronous Rectified Buck MOSFET Driver | Intersil |
| ISL6208C | High Voltage Synchronous Rectified Buck MOSFET Drivers | Intersil |
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