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PDF FDMF6705B Data sheet ( Hoja de datos )
| Número de pieza | FDMF6705B | |
| Descripción | High-Frequency DrMOS Module | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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March 2012
FDMF6705B - Extra-Small, High-Performance, High-
Frequency DrMOS Module
Benefits
Ultra-Compact 6x6mm PQFN, 72% Space-Saving
Compared to Conventional Discrete Solutions
Fully Optimized System Efficiency
Clean Switching Waveforms with Minimal Ringing
High-Current Handling
Features
Over 93% Peak-Efficiency
High-Current Handling of 40A at 12VIN
High-Current Handling of 38A at 19VIN
High-Performance PQFN Copper-Clip Package
3-State 3.3V PWM Input Driver
Skip-Mode SMOD# (Low-Side Gate Turn-Off) Input
Thermal Warning Flag for Over-Temperature
Condition
Driver Output Disable Function (DISB# Pin)
Internal Pull-Up and Pull-Down for SMOD# and
DISB# Inputs, Respectively
Fairchild PowerTrench® Technology MOSFETs for
Clean Voltage Waveforms and Reduced Ringing
Fairchild SyncFET™ (Integrated Schottky Diode)
Technology in the Low-Side MOSFET
Integrated Bootstrap Schottky Diode
Adaptive Gate Drive Timing for Shoot-Through
Protection
Under-Voltage Lockout (UVLO)
Optimized for Switching Frequencies up to 1MHz
Low-Profile SMD Package
Fairchild Green Packaging and RoHS Compliance
Based on the Intel® 4.0 DrMOS Standard
Description
The XS™ DrMOS family is Fairchild’s next-generation,
fully optimized, ultra-compact, integrated MOSFET plus
driver power stage solution for high-current, high-
frequency, synchronous buck DC-DC applications. The
FDMF6705B integrates a driver IC, two power MOSFETs,
and a bootstrap Schottky diode into a thermally
enhanced, ultra-compact 6x6mm PQFN package.
With an integrated approach, the complete switching
power stage is optimized with regards to driver and
MOSFET dynamic performance, system inductance,
and power MOSFET RDS(ON). XS™ DrMOS uses
Fairchild's high-performance PowerTrench® MOSFET
technology, which dramatically reduces switch ringing,
eliminating the need for a snubber circuit in most buck
converter applications.
A new driver IC with reduced dead times and
propagation delays further enhances the performance of
this part. A thermal warning function warns of a potential
over-temperature situation. The FDMF6705B also
incorporates features, such as Skip Mode (SMOD), for
improved light-load efficiency, along with a three-state
3.3V PWM input for compatibility with a wide range of
PWM controllers.
Applications
High-Performance Gaming Motherboards
Notebook Computers, V-Core and Non-V-Core
Compact Blade Servers, V-Core and Non-V-Core
DC-DC Converters
Desktop Computers, V-Core and Non-V-Core
DC-DC Converters
Workstations
High-Current DC-DC Point-of-Load (POL)
Converters
Small Form-Factor Voltage Regulator Modules
Ordering Information
Part Number Current Rating
Package
FDMF6705B
40A 40-Lead, Clipbond PQFN DrMOS, 6.0x6.0mm Package
Top Mark
FDMF6705B
© 2011 Fairchild Semiconductor Corporation
FDMF6705B • Rev. 1.0.2
www.fairchildsemi.com
Free Datasheet http://www.datasheet4u.com/
1 page  
Electrical Characteristics
Typical values are VIN = 12V, VCIN = 5V, VDRV = 5V, and TA = +25°C unless otherwise noted.
Symbol
Parameter
Basic Operation
IQ
UVLO
Quiescent Current
UVLO Threshold
UVLO_Hyst UVLO Hysteresis
PWM Input (VCIN = VDRV = 5V ±10%)
RUP_PWM Pull-Up Impedance
RDN_PWM Pull-Down Impedance
VIH_PWM
VTRI_HI
PWM High Level Voltage
3-State Upper Threshold
VTRI_LO
VIL_PWM
3-State Lower Threshold
PWM Low Level Voltage
tD_HOLD-OFF 3-State Shut-off Time
VHiZ_PWM 3-State Open Voltage
PWM Input (VCIN = VDRV = 5V ±5%)
RUP_PWM Pull-Up Impedance
RDN_PWM Pull-Down Impedance
VIH_PWM PWM High Level Voltage
VTRI_HI
VTRI_LO
3-State Upper Threshold
3-State Lower Threshold
VIL_PWM PWM Low Level Voltage
tD_HOLD-OFF 3-State Shut-off Time
VHiZ_PWM 3-State Open Voltage
DISB# Input
VIH_DISB
VIL_DISB
High-Level Input Voltage
Low-Level Input Voltage
IPLD Pull-Down Current
tPD_DISBL Propagation Delay
tPD_DISBH Propagation Delay
SMOD# Input
VIH_SMOD High-Level Input Voltage
VIL_SMOD Low-Level Input Voltage
IPLU Pull-Up Current
tPD_SLGLL Propagation Delay
tPD_SHGLH Propagation Delay
Condition
Min. Typ. Max. Unit
IQ=IVCIN+IVDRV, PWM=LOW or HIGH or Float
2 mA
VCIN Rising
2.9 3.1 3.3 V
0.4 V
26
12
1.88 2.25
1.84 2.20
0.70 0.95
0.62 0.85
160
1.40 1.60
2.61
2.56
1.19
1.13
200
1.90
kΩ
kΩ
V
V
V
V
ns
V
26
12
2.00 2.25
1.94 2.20
0.75 0.95
0.66 0.85
160
1.45 1.60
2.50
2.46
1.15
1.09
200
1.80
kΩ
kΩ
V
V
V
V
ns
V
PWM=GND, Delay Between DISB# from
HIGH to LOW to GL from HIGH to LOW
PWM=GND, Delay Between DISB# from
LOW to HIGH to GL from LOW to HIGH
2V
0.8 V
10 µA
25 ns
25 ns
2V
0.8 V
10 µA
PWM=GND, Delay Between SMOD# from
HIGH to LOW to GL from HIGH to LOW
10
ns
PWM=GND, Delay Between SMOD# from
LOW to HIGH to GL from LOW to HIGH
10
ns
Continued on the following page…
© 2011 Fairchild Semiconductor Corporation
FDMF6705B • Rev. 1.0.2
5
www.fairchildsemi.com
Free Datasheet http://www.datasheet4u.com/
5 Page 
Typical Performance Characteristics (Continued)
Test Conditions: VIN=12V, VOUT=1.0V, VCIN=5V, VDRV=5V, LOUT=320nH, TA=25°C, and natural convection cooling,
unless otherwise specified.
11.5
VCIN = 5V
11.0
10.5
IPLD
10.0
9.5
-50
-25 0
25 50 75 100 125
Driver IC Junction Temperature, TJ (°C)
150
Figure 24. DISB# Pull-Down Current vs. Temperature
© 2011 Fairchild Semiconductor Corporation
FDMF6705B • Rev. 1.0.2
11
www.fairchildsemi.com
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet FDMF6705B.PDF ] | |
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