LTC4440-5 View Datasheet(PDF) - Linear Technology

Part Name

Description

Manufacturer

LTC4440-5

High Speed, High Voltage, High Side Gate Driver

Linear Technology 

LTC4440-5

High Speed, High Voltage,

High Side Gate Driver

FEATURES

■ Wide Operating VIN Range: Up to 60V

■ Rugged Architecture Tolerant of 80V VIN Transients

■ 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 (ThinSOTTM) and

Thermally Enhanced 8-Pin MSOP Packages

U

APPLICATIO S

■ 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

trademark of Linear Technology Corporation. All other trademarks are the property of their

respective owners. Protected by U.S. Patents including 6677210.

DESCRIPTIO

The LTC®4440-5 is a high frequency high side N-channel

MOSFET gate driver that is designed to operate in applica-

tions with VIN voltages up to 60V. The LTC4440-5 can also

withstand and continue to function during 80V VIN tran-

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

VCC UV+

VCC UV–

LTC4440-5

60V

80V

4V to 15V

3.2V

3.04V

LTC4440

80V

100V

8V to 15V

6.3V

6.0V

TYPICAL APPLICATIO

Synchronous Phase-Modulated Full-Bridge Converter

VIN

36V TO 60V

VCC

4V TO 15V

LTC4440-5

VCC BOOST

INP TG

GND TS

LTC3722-1

LTC4440-5

VCC BOOST

INP TG

GND TS

••

4440 TA01

LTC4440-5 Driving a 1000pF Capacitive Load

TG-TS

2V/DIV

INP

2V/DIV

50ns/DIV

VCC = BOOST-TS = 5V

4440-5 TA02

44405fa

1

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