LTC4444-5 - High Voltage Synchronous N-Channel MOSFET Driver

The LTC4444-5 is a high frequency high voltage gate driver that drives two N-channel MOSFETs in a synchronous 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-independent inputs. The high side input logic signal is internally level‑shifted to the bootstrapped supply, which may function 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.

Features

Bootstrap Supply Voltage to 114V
Wide VCC Voltage: 4.5V to 13.5V
Adaptive Shoot-Through Protection
1.4A Peak Top Gate Pull-Up Current
1.75A Peak Bottom Gate Pull-Up Current
1.5Ω Top Gate Driver Pull-Down
0.75Ω Bottom Gate Driver Pull-Down
5ns Top Gate Fall Time Driving 1nF Load
8ns Top Gate Rise Time Driving 1nF Load
3ns Bottom Gate Fall Time Driving 1nF Load
6ns Bottom Gate Rise Time Driving 1nF Load
Drives Both High and Low Side N-Channel MOSFETs
Undervoltage Lockout
Thermally Enhanced 8-Pin MSOP Package

Typical Application

Applications

Distributed Power Architectures
Automotive Power Supplies
High Density Power Modules
Telecommunication Systems

Packaging

**Order Information**
Part Number	Package	Temp	Price(1-99)	Price (1k)*
LTC4444EMS8E-5#PBF	MS-8	E	$2.42	$1.69
LTC4444EMS8E-5#TRPBF	MS-8	E		$1.75
LTC4444HMS8E-5#PBF	MS-8	H	$2.86	$2.00
LTC4444HMS8E-5#TRPBF	MS-8	H		$2.06
LTC4444IMS8E-5#PBF	MS-8	I	$2.59	$1.81
LTC4444IMS8E-5#TRPBF	MS-8	I		$1.87
LTC4444MPMS8E-5	MS-8	MP	$4.11	$2.88
LTC4444MPMS8E-5#PBF	MS-8	MP	$4.11	$2.88
LTC4444MPMS8E-5#TR	MS-8	MP		$2.94
LTC4444MPMS8E-5#TRPBF	MS-8	MP		$2.94