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LTC4442EMS8E Datasheet

High Speed Synchronous N-Channel MOSFET

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FEATURES
Wide VCC Range: 6V to 9.5V
38V Maximum Input Supply Voltage
Adaptive Shoot-Through Protection
2.4A Peak Pull-Up Current
5A Peak Pull-Down Current
8ns TG Fall Time Driving 3000pF Load
12ns TG Rise Time Driving 3000pF Load
Separate Supply to Match PWM Controller
Drives Dual N-Channel MOSFETs
Undervoltage Lockout
Thermally Enhanced MSOP Package
APPLICATIONS
Distributed Power Architectures
High Density Power Modules
TYPICAL APPLICATION
Synchronous Buck Converter Driver
VCC
6V
PWM
VIN
32V
BOOST
LTC4442
VLOGIC
TG
VCC
TS
IN
BG
GND
VOUT
4442 TA01a
LTC4442/LTC4442-1
High Speed Synchronous
N-Channel MOSFET Drivers
DESCRIPTION
The LTC®4442 is a high frequency gate driver designed
to drive two N-channel MOSFETs in a synchronous buck
DC/DC converter topology. The powerful driver capabil-
ity reduces switching losses in MOSFETs with high gate
capacitance.
The LTC4442 features a separate supply for the input
logic to match the signal swing of the controller IC. If the
input signal is not being driven, the LTC4442 activates a
shutdown mode that turns off both external MOSFETs.
The input logic signal is internally level-shifted to the
bootstrapped supply, which may function at up to 42V
above ground.
The LTC4442 contains undervoltage lockout circuits on
both the driver and logic supplies that turn off the external
MOSFETs when an undervoltage condition is present.
The LTC4442 and LTC4442-1 have different undervoltage
lockout thresholds to accommodate a wide variety of ap-
plications. An adaptive shoot-through protection feature is
also built-in to prevent power loss resulting from MOSFET
cross-conduction current.
The LTC4442/LTC4442-1 are available in the thermally
enhanced 8-lead MSOP package.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
LTC4442 Driving 3000pF Capacitive Loads
INPUT (IN)
5V/DIV
BOTTOM
GATE (BG)
5V/DIV
TOP GATE
(TG-TS)
5V/DIV
10ns/DIV
4442 TA01b
4442fb
1


Linear Technology Electronic Components Datasheet

LTC4442EMS8E Datasheet

High Speed Synchronous N-Channel MOSFET

No Preview Available !

LTC4442/LTC4442-1
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Supply Voltage
VCC......................................................... –0.3V to 10V
VLOGIC.................................................... –0.3V to 10V
BOOST – TS........................................... –0.3V to 10V
IN Voltage .................................................. –0.3V to 10V
BOOST Voltage .......................................... –0.3V to 42V
TS Voltage..................................................... –5V to 38V
TS + VCC....................................................................42V
Driver Output TG (with Respect to TS)....... –0.3V to 10V
Driver Output BG........................................ –0.3V to 10V
Operating Temperature Range (Note 2).... –40°C to 85°C
Junction Temperature (Note 3) ............................. 125°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
PIN CONFIGURATION
TOP VIEW
TG 1
8 BOOST
TS 2
9
7 VCC
BG 3
GND
6 VLOGIC
GND 4
5 IN
MS8E PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 125°C, θJA = 40°C/W
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC4442EMS8E#PBF
LTC4442EMS8E#TRPBF LTCTJ
8-Lead Plastic MSOP
–40°C to 85°C
LTC4442IMS8E#PBF
LTC4442IMS8E#TRPBF LTCTJ
8-Lead Plastic MSOP
–40°C to 85°C
LTC4442EMS8E-1#PBF LTC4442EMS8E-1#TRPBF LTCXR
8-Lead Plastic MSOP
–40°C to 85°C
LTC4442IMS8E-1#PBF LTC4442IMS8E-1#TRPBF LTCXR
8-Lead Plastic MSOP
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = VBOOST = 7V, VTS = GND = 0V, VLOGIC = 5V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Logic Supply (VLOGIC)
VLOGIC
Operating Range
IVLOGIC
DC Supply Current
UVLO
Undervoltage Lockout Threshold
IN = Floating
VLOGIC Rising
VLOGIC Falling
Hysteresis
3
9.5
V
730
850
μA
2.5
2.75
3.0
V
2.4
2.65
2.9
V
100
mV
Gate Driver Supply (VCC)
VCC
Operating Range
IVCC
DC Supply Current
IN = Floating
6
9.5
V
300
380
μA
4442fb
2


Part Number LTC4442EMS8E
Description High Speed Synchronous N-Channel MOSFET
Maker Linear
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LTC4442EMS8E Datasheet PDF






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