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LTC4442_15

产品描述High Speed Synchronous N-Channel MOSFET Drivers
文件大小165KB,共14页
制造商Linear ( ADI )
官网地址http://www.analog.com/cn/index.html
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LTC4442_15概述

High Speed Synchronous N-Channel MOSFET Drivers

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LTC4442/LTC4442-1
High Speed Synchronous
N-Channel MOSFET Drivers
FEATURES
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.
Wide V
CC
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
V
CC
6V
BOOST
LTC4442
V
LOGIC
V
CC
PWM
IN
GND
4442 TA01a
LTC4442 Driving 3000pF Capacitive Loads
V
IN
32V
INPUT (IN)
5V/DIV
TG
TS
BG
V
OUT
BOTTOM
GATE (BG)
5V/DIV
TOP GATE
(TG-TS)
5V/DIV
10ns/DIV
4442 TA01b
4442fb
1

LTC4442_15相似产品对比

LTC4442_15 LTC4442-1_15
描述 High Speed Synchronous N-Channel MOSFET Drivers High Speed Synchronous N-Channel MOSFET Drivers

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