LTC4440-5 Linear Technology, LTC4440-5 Datasheet

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LTC4440-5

Manufacturer Part Number
LTC4440-5
Description
High Speed High Voltage High Side Gate Driver
Manufacturer
Linear Technology
Datasheet
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
trademark of Linear Technology Corporation. All other trademarks are the property of their
respective owners. Protected by U.S. Patents including 6677210.
36V TO 60V
Telecommunications Power Systems
Distributed Power Architectures
Server Power Supplies
High Density Power Modules
General Purpose Low-Side Driver
, LTC and LT are registered trademarks of Linear Technology Corporation. ThinSOT is a
Wide Operating V
Rugged Architecture Tolerant of 80V V
Powerful 1.85Ω Driver Pull-Down (with 6V Supply)
Powerful 1.1A Peak Current Driver Pull-Up
(with 6V Supply)
7ns Fall Time Driving 1000pF Load
10ns Rise Time Driving 1000pF Load
Drives Standard Threshold MOSFETs
TTL/CMOS Compatible Inputs with Hysteresis
Input Thresholds are Independent of Supply
Undervoltage Lockout
Low Profile (1mm) SOT-23 (ThinSOT
Thermally Enhanced 8-Pin MSOP Packages
4V TO 15V
Synchronous Phase-Modulated Full-Bridge Converter
V
V
CC
IN
LTC3722-1
U
IN
Range: Up to 60V
V
INP
GND
V
INP
GND
LTC4440-5
LTC4440-5
CC
CC
BOOST
BOOST
TG
TG
TS
TS
U
TM
) and
IN
Transients
4440 TA01
DESCRIPTIO
The LTC
MOSFET gate driver that is designed to operate in applica-
tions with V
withstand and continue to function during 80V V
sients. The powerful driver capability reduces switching
losses in MOSFETs with high gate capacitances. The
LTC4440-5’s pull-up has a peak output current of 1.1A and
its pull-down has an output impedance of 1.85Ω.
The LTC4440-5 features supply independent TTL/CMOS
compatible input thresholds with 350mV of hysteresis.
The input logic signal is internally level-shifted to the
bootstrapped supply, which may function at up to 95V
above ground.
The LTC4440-5 is optimized for driving (5V) logic level
FETs and contains an undervoltage lockout circuit that
disables the external MOSFET when activated.
The LTC4440-5 is available in the low profile (1mm)
SOT-23 or a thermally enhanced 8-lead MSOP package.
PARAMETER
Max Operating TS
Absolute Max TS
MOSFET Gate Drive
V
V
High Speed, High Voltage,
CC
CC
UV
UV
+
®
LTC4440-5 Driving a 1000pF Capacitive Load
4440-5 is a high frequency high side N-channel
2V/DIV
2V/DIV
TG-TS
High Side Gate Driver
IN
INP
voltages up to 60V. The LTC4440-5 can also
V
CC
= BOOST-TS = 5V
U
LTC4440-5
4V to 15V
3.04V
3.2V
60V
80V
50ns/DIV
www.DataSheet4U.com
LTC4440-5
4440-5 TA02
8V to 15V
LTC4440
100V
6.3V
6.0V
80V
IN
44405fa
tran-
1

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LTC4440-5 Summary of contents

Page 1

... V sients. The powerful driver capability reduces switching losses in MOSFETs with high gate capacitances. The LTC4440-5’s pull-up has a peak output current of 1.1A and its pull-down has an output impedance of 1.85Ω. The LTC4440-5 features supply independent TTL/CMOS compatible input thresholds with 350mV of hysteresis. ...

Page 2

... LTC4440 ABSOLUTE MAXIMUM Supply Voltage V ....................................................... – 0.3V to 15V CC BOOST – TS ......................................... – 0.3V to 15V INP Voltage ............................................... – 0.3V to 15V BOOST Voltage (Continuous) ................... – 0.3V to 85V BOOST Voltage (100ms) .......................... – 0.3V to 95V TS Voltage (Continuous) ............................. – 70V U PACKAGE/ORDER INFORMATION TOP VIEW INP 1 GND GND 4 MS8E PACKAGE 8-LEAD PLASTIC MSOP = 125° ...

Page 3

... Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: The LTC4440-5 is guaranteed to meet performance specifications from 0°C to 85°C. Specifications over the –40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls ...

Page 4

... LTC4440 TYPICAL PERFOR A CE CHARACTERISTICS Output High Voltage ( Supply Voltage 1mA 10mA I = 100mA BOOST-TS SUPPLY VOLTAGE (V) 4440-5 G04 V Supply Current CC vs Temperature 250 INP = GND 200 INP = V ...

Page 5

... BOOST (Pin 6): High Side Bootstrapped Supply. An exter- nal capacitor should be tied between this pin and TS (Pin 4). Normally, a bootstrap diode is connected between V (Pin 1) and this pin. Voltage swing at this pin is from CC V – drop of the bootstrap diode. LTC4440-5 www.DataSheet4U.com = BOOST = PLH t PHL –35 – ...

Page 6

... LTC4440 CTIO S Exposed Pad MS8E Package INP (Pin 1): Input Signal. TTL/CMOS compatible input referenced to GND (Pin 2). GND (Pins 2, 4): Chip Ground. V (Pin 3): Chip Supply. This pin powers the internal low CC side circuitry. A low ESR ceramic bypass capacitor should be tied between this pin and the GND pin (Pin 2). ...

Page 7

... MOSFET’s gate capacitance during high-to-low signal transitions. When the power MOSFET’s gate is pulled low (gate shorted to source through N1) by the LTC4440-5, its source (TS) is pulled low by its load (e.g., an inductor or resistor). The slew rate of the source/ of 6V. ...

Page 8

... D. Keep the copper trace between the driver output pin and ) BOOST–TS the load short and wide. E. When using the MS8E package, be sure to solder the exposed pad on the back side of the LTC4440-5 pack- age to the board. Correctly soldered to a 2500mm . The Q value G ...

Page 9

... U TYPICAL APPLICATIO S LTC4440-5 www.DataSheet4U.com 44405fa 9 ...

Page 10

... LTC4440-5 U TYPICAL APPLICATIO S 10 www.DataSheet4U.com 44405fa ...

Page 11

... TYP S6 Package 6-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1636) 0.95 REF 1.22 REF 1.50 – 1.75 2.80 BSC 1.4 MIN (NOTE 4) 0.95 BSC 0.80 – 0.90 1.00 MAX 0.30 – 0.50 REF 0.09 – 0.20 (NOTE 3) LTC4440-5 www.DataSheet4U.com 0.52 (.0205 REF 3.00 ± 0.102 (.118 ± .004) (NOTE BOTTOM VIEW OF 1.10 0.86 EXPOSED PAD OPTION ( ...

Page 12

... LTC4440-5 U TYPICAL APPLICATIO 240W 42V-56V 0.56µ 1µF 1µF 48V IN 11V 100V 100V D1 – INP BOOST LTC4440-5ES6 5 TG GND 0.22µ 12V 11V IN A MMBT3904 6 4 15k 120Ω DRVA DRVB 1/ LTC3723EGN-2 215k 15 UVLO DPRG ...

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