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Linear Technology Electronic Components Datasheet

LTC4444HMS8E-5 Datasheet

High Voltage Synchronous N-Channel MOSFET

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FEATURES
n Bootstrap Supply Voltage to 114V
n Wide VCC Voltage: 4.5V to 13.5V
n Adaptive Shoot-Through Protection
n 1.4A Peak Top Gate Pull-Up Current
n 1.75A Peak Bottom Gate Pull-Up Current
n 1.5Ω Top Gate Driver Pull-Down
n 0.75Ω Bottom Gate Driver Pull-Down
n 5ns Top Gate Fall Time Driving 1nF Load
n 8ns Top Gate Rise Time Driving 1nF Load
n 3ns Bottom Gate Fall Time Driving 1nF Load
n 6ns Bottom Gate Rise Time Driving 1nF Load
n Drives Both High and Low Side N-Channel MOSFETs
n Undervoltage Lockout
n Thermally Enhanced 8-Pin MSOP Package
APPLICATIONS
n Distributed Power Architectures
n Automotive Power Supplies
n High Density Power Modules
n Telecommunication Systems
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
No RSENSE is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners. Protected by U.S. Patents, including 6677210.
LTC4444-5
High Voltage Synchronous
N-Channel MOSFET Driver
DESCRIPTION
The LTC®4444-5 is a high frequency high voltage gate
driver that drives two N-channel MOSFETs in a synchro-
nous DC/DC converter with supply voltages up to 100V.
This powerful driver reduces switching losses in MOSFETs
with high gate capacitance.
The LTC4444-5 is configured for two supply-indepen-
dent inputs. The high side input logic signal is internally
level-shifted to the bootstrapped supply, which may func-
tion at up to 114V above ground.
The LTC4444-5 contains undervoltage lockout circuits that
disable the external MOSFETs when activated. Adaptive
shoot-through protection prevents both MOSFETs from
conducting simultaneously.
For a similar driver in this product family, please refer to
the chart below.
PARAMETER
Shoot-Through Protection
Absolute Max TS
MOSFET Gate Drive
VCC UV+
VCC UV
LTC4444-5
Yes
100V
4.5V to 13.5V
4V
3.5V
LTC4446
No
100V
7.2V to 13.5V
6.6V
6.15V
LTC4444
Yes
100V
7.2V to 13.5V
6.6V
6.15V
TYPICAL APPLICATION
High Input Voltage Buck Converter
VCC
4.5V TO 13.5V
PWM1
(FROM CONTROLLER IC)
PWM2
(FROM CONTROLLER IC)
BOOST
VCC
TG
LTC4444-5
TINP
TS
BINP
BG
GND
VIN
100V
VOUT
44445 TA01a
LTC4444-5 Driving a 1000pF Capacitive Load
BINP
5V/DIV
BG
5V/DIV
TINP
5V/DIV
TG-TS
5V/DIV
20ns/DIV
44445 TA01b
44445fc
1


Linear Technology Electronic Components Datasheet

LTC4444HMS8E-5 Datasheet

High Voltage Synchronous N-Channel MOSFET

No Preview Available !

LTC4444-5
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Supply Voltage
VCC......................................................... –0.3V to 14V
BOOST – TS........................................... –0.3V to 14V
TINP Voltage ................................................. –2V to 14V
BINP Voltage................................................. –2V to 14V
BOOST Voltage .........................................–0.3V to 114V
TS Voltage .................................................. –5V to 100V
Operating Junction Temperature Range
(Notes 2, 3)........................................ –55°C to 150°C
Storage Temperature Range ..................–65°C to 150°C
Lead Temperature (Soldering, 10 sec)................... 300°C
PIN CONFIGURATION
TOP VIEW
TINP 1
8 TS
BINP 2
9
7 TG
VCC 3
GND
6 BOOST
BG 4
5 NC
MS8E PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 125°C, θJA = 40°C/W, θJC = 10°C/W (NOTE 4)
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
LTC4444EMS8E-5#PBF LTC4444EMS8E-5#TRPBF LTDPY
8-Lead Plastic MSOP
–40°C to 125°C
LTC4444IMS8E-5#PBF LTC4444IMS8E-5#TRPBF LTDPY
8-Lead Plastic MSOP
–40°C to 125°C
LTC4444HMS8E-5#PBF LTC4444HMS8E-5#TRPBF LTDPY
8-Lead Plastic MSOP
–40°C to 150°C
LTC4444MPMS8E-5#PBF LTC4444MPMS8E-5#TRPBF LTFDF
8-Lead Plastic MSOP
–55°C to 150°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 l denotes the specifications which apply over the full operating junction
temperature range, otherwise specifications are at TA = 25°C (Note 2). VCC = VBOOST = 6V, VTS = GND = 0V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Gate Driver Supply, VCC
VCC
Operating Voltage
IVCC
DC Supply Current
UVLO
Undervoltage Lockout Threshold
TINP = BINP = 0V
VCC Rising
VCC Falling
Hysteresis
4.5
13.5
V
320
520
μA
l 3.60 4.00 4.40
V
l 3.20 3.55 3.90
V
450
mV
Bootstrapped Supply (BOOST – TS)
IBOOST
DC Supply Current
Input Signal (TINP, BINP)
TINP = BINP = 0V
0.1
2
μA
VIH(BG)
VIL(BG)
VIH(TG)
VIL(TG)
BG Turn-On Input Threshold
BG Turn-Off Input Threshold
TG Turn-On Input Threshold
TG Turn-Off Input Threshold
BINP Ramping High
BINP Ramping Low
TINP Ramping High
TINP Ramping Low
l 2.25 2.75 3.25
V
l 1.85
2.3
2.75
V
l 2.25 2.75 3.25
V
l 1.85
2.3
2.75
V
44445fc
2


Part Number LTC4444HMS8E-5
Description High Voltage Synchronous N-Channel MOSFET
Maker Linear
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