LM2724M National Semiconductor, LM2724M Datasheet

IC DRIVER MOSFET DUAL SYNC 8SOIC

LM2724M

Manufacturer Part Number
LM2724M
Description
IC DRIVER MOSFET DUAL SYNC 8SOIC
Manufacturer
National Semiconductor
Datasheet

Specifications of LM2724M

Configuration
High and Low Side, Synchronous
Input Type
Non-Inverting
Delay Time
19ns
Current - Peak
3A
Number Of Configurations
1
Number Of Outputs
2
High Side Voltage - Max (bootstrap)
28V
Voltage - Supply
4.3 V ~ 6.8 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
*LM2724M

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM2724M
Manufacturer:
NS
Quantity:
1 054
Part Number:
LM2724M
Manufacturer:
NS/国半
Quantity:
20 000
Part Number:
LM2724MX
Manufacturer:
NS/国半
Quantity:
20 000
© 2003 National Semiconductor Corporation
LM2724A
High Speed 3A Synchronous MOSFET Driver
General Description
The LM2724A is a dual N-channel MOSFET driver which
can drive both the top and bottom MOSFETs in a push-pull
structure simultaneously. The LM2724A takes a logic input
and splits it into two complimentary signals with a typical
20ns dead time in between. The built-in cross-conduction
protection circuitry prevents the top and bottom MOSFETs
from turning on simultaneously. With a bias voltage of 5V, the
peak sourcing and sinking current for each driver of the
LM2724A is about 3A. Input UVLO (Under-Voltage-Lock-
Out) ensures that all the driver outputs stay low until the
supply rail exceeds the power-on threshold during system
power on, or after the supply rail drops below power-on
threshold by a specified hysteresis during system power
down. The cross-conduction 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 struc-
ture. When not switching, the LM2724A only draws up to
Typical Application
DS200735
195µA from the 5V rail. The synchronization operation of the
bottom MOSFET can be disabled by pulling the SYNC pin to
ground.
Features
n Shoot-through protection
n Input Under-Voltage-Lock-Out
n 3A peak driving current
n 195µA quiescent current
n 28V input voltage in buck configuration
n SO-8 and LLP packages
Applications
n High Current DC/DC Power Supplies
n High Input Voltage Switching Regulators
n Fast Transient Microprocessors
n Notebook Computers
www.national.com
20073501
June 2003

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LM2724M Summary of contents

Page 1

... The top gate voltage needed by the top MOSFET is obtained through an external boot-strap struc- ture. When not switching, the LM2724A only draws up to Typical Application © 2003 National Semiconductor Corporation 195µA from the 5V rail. The synchronization operation of the bottom MOSFET can be disabled by pulling the SYNC pin to ground. ...

Page 2

Connection Diagram 8-Lead SO (NS Package # M08A) θ = 172˚C/W JA Ordering Information Order Number LM2724AM LM2724AMX LM2724ALD LM2724ALDX Pin Descriptions Pin Name BOOT SYNC ...

Page 3

Block Diagram 3 20073503 www.national.com ...

Page 4

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications BOOT to SW BOOT to GND (Note GND Junction Temperature Power Dissipation (Note 3) Electrical Characteristics LM2724A V = BOOT = SYNC = 5V GND = 0V, unless otherwise specified. Typicals and limits appearing in plain type apply for ...

Page 5

Electrical Characteristics LM2724A (Continued BOOT = SYNC = 5V GND = 0V, unless otherwise specified. Typicals and limits appearing in plain type apply for +25˚C. Limits appearing in boldface type apply ...

Page 6

Timing Diagram www.national.com 6 20073504 ...

Page 7

Physical Dimensions inches (millimeters) unless otherwise noted 8-Lead Small Outline Package Order Number LM2724AM, LM2724AMX NS Package Number M08A 7 www.national.com ...

Page 8

... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...

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