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LM2724AMX 数据表(PDF) 1 Page - Texas Instruments

部件名 LM2724AMX
功能描述  LM2724A High Speed 3A Synchronous MOSFET Driver
Download  11 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

LM2724AMX 数据表(HTML) 1 Page - Texas Instruments

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background image
+
C4
+
C3
VIN (up to 28V)
VOUT
GND
8
LG
7
VCC
6
SYNC
5
IN
4
BOOT
3
HG
2
SW
1
U1
C2
.33PF
C1
1PF
Q1
Q2
+5V
(to controller)
(to controller)
D1
L1
1.5
NRND
LM2724A
www.ti.com
SNVS242C – JUNE 2003 – REVISED MARCH 2013
LM2724A High Speed 3A Synchronous MOSFET Driver
Check for Samples: LM2724A
1
FEATURES
DESCRIPTION
The LM2724A is a dual N-channel MOSFET driver
2
Shoot-Through Protection
which can drive both the top and bottom MOSFETs in
Input Under-Voltage-Lock-Out
a push-pull structure simultaneously. The LM2724A
3A Peak Driving Current
takes a logic input and splits it into two complimentary
signals with a typical 20ns dead time in between. The
195µA Quiescent Current
built-in cross-conduction protection circuitry prevents
28V Input Voltage in Buck Configuration
the top and bottom MOSFETs from turning on
SOIC-8 and WSON Packages
simultaneously. With a bias voltage of 5V, the peak
sourcing and sinking current for each driver of the
APPLICATIONS
LM2724A is about 3A. Input UVLO (Under-Voltage-
Lock-Out) ensures that all the driver outputs stay low
High Current DC/DC Power Supplies
until the supply rail exceeds the power-on threshold
High Input Voltage Switching Regulators
during system power on, or after the supply rail drops
below power-on threshold by a specified hysteresis
Fast Transient Microprocessors
during system power down. The cross-conduction
Notebook Computers
protection circuitry detects both driver outputs and will
not turn on a driver until the other driver output is low.
The top gate voltage needed by the top MOSFET is
obtained through an external boot-strap structure.
When not switching, the LM2724A only draws up to
195µA
from
the
5V
rail.
The
synchronization
operation of the bottom MOSFET can be disabled by
pulling the SYNC pin to ground.
TYPICAL APPLICATION
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2003–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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