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PDF FAN53418M Data sheet ( Hoja de datos )
| Número de pieza | FAN53418M | |
| Descripción | Synchronous DC-DC MOSFET Driver | |
| Fabricantes | Fairchild Semiconductor | |
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FAN53418
Synchronous DC-DC MOSFET Driver
www.fairchildsemi.com
Features
• Drives N-channel High-Side and Low-Side MOSFETs in
a synchronous buck configuration
• Internal Adaptive “Shoot-Through” Protection
• High Switching Frequency (> 500kHz)
– 30ns Output Rise/Fall Times w/3000pF load
– 20ns Propagation Delay
• 12V High-Side and 12V Low-Side Drive
• OD input for Output Disable – allows for synchronization
with PWM controller
• SOIC-8 Package
Applications
• Multi-phase VRM/VRD regulators for Microprocessor
Power
• High Current/High Frequency DC/DC Converters
• High Power Modular Power Supplies
General Description
The FAN53418 is a high frequency, dual MOSFET driver
specifically designed to drive two power N-Channel
MOSFETs in a synchronous rectified buck converter.
These drivers combined with a FAN53168 Multi-Phase Buck
PWM controller and power MOSFETs form a complete core
voltage regulator solution for advanced microprocessors.
The FAN53418 drives both the upper and lower gates in a
synchronous rectifier to +12V. The upper gate drive imple-
ments bootstrapping with only an external capacitor and
diode required. This reduces implementation complexity
and allows the use of higher performance, cost effective,
N-Channel MOSFETs.
The output drivers in the FAN53418 have the capacity to
efficiently switch power MOSFETs at frequencies over
500kHz. Each driver is capable of driving a 3000pF load
with a ~20ns propagation delay and ~30ns transition time.
Adaptive shoot-through protection is integrated to prevent
both MOSFETs from conducting simultaneously. Addition-
ally an Output Disable function is included to synchronize
the driver with the PWM controller. The FAN53418 is
rated for operation from 0°C to +85°C and is available in a
low-cost SOIC-8 package.
Basic Application
+12V
D1 1 BST
CBST
DRVH 8
2 IN
SW 7
FAN54318
3 OD
PGND 6
4 VCC
C VCC
DRVL 5
Q1 C VIN
L1
Q2
Figure 1. Basic Application Circuit
REV. 1.0.0 6/11/03
1 page  
Timing Characteristics
OD
HDRV/LDRV
VIL(OD)
tpdl(OD)
90%
VIH(OD)
tpdh(OD)
10%
Figure 2. Output Disable Timing
FAN53418
IN
DRVL
DRVH-SW
tf(DRVL)
tpdl(DRVL)
tpdh(DRVH)
tpdl(DRVH)
tf(DRVH)
tr(DRVH)
VTH
VTH
tr(DRVL)
SW
1V
tpdh(DRVH)
Figure 3. Non-overlap Timing Diagram (Timing is referenced to the 90% and 10% points unless otherwise noted)
REV. 1.0.0 6/11/03
5
5 Page 
FAN53418
Ordering Information
Part Number
FAN53418M
Temperature Range
0°C to +85°C
Package
SOIC-8
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO
ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME
ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN;
NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
www.fairchildsemi.com
6/11/03 0.0m 003
Stock#DS300053418
© 2003 Fairchild Semiconductor Corporation
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet FAN53418M.PDF ] | |
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