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LM2671M-5.0 数据表(PDF) 1 Page - Texas Instruments

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部件名 LM2671M-5.0
功能描述  LM2671 SIMPLE SWITCHER짰 Power Converter High Efficiency 500-mA Step-Down Voltage Regulator With Features
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

LM2671M-5.0 数据表(HTML) 1 Page - Texas Instruments

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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
LM2671
SNVS008L – SEPTEMBER 1998 – REVISED JUNE 2016
LM2671 SIMPLE SWITCHER® Power Converter High Efficiency 500-mA
Step-Down Voltage Regulator With Features
1
1 Features
1
Efficiency up to 96%
Available in 8-Pin SOIC, PDIP, and WSON
Packages
Simple and Easy to Design With
Requires Only 5 External Components
Uses Readily Available Standard Inductors
3.3-V, 5-V, 12-V, and Adjustable Output Versions
Adjustable Version Output Voltage Range: 1.21 V
to 37 V
±1.5% Maximum Output Voltage Tolerance Over
Line and Load Conditions
Ensured 500-mA Output Load Current
0.25-
Ω DMOS Output Switch
Wide Input Voltage Range: 8 V to 40 V
260-kHz Fixed Frequency Internal Oscillator
TTL Shutdown Capability, Low Power Standby
Mode
Soft-Start and Frequency Synchronization
Thermal Shutdown and Current-Limit Protection
2 Applications
Simple High Efficiency (> 90%) Step-Down (Buck)
Regulators
Efficient Preregulator for Linear Regulators
3 Description
The LM2671 series of regulators are monolithic
integrated circuits built with a LMDMOS process.
These regulators provide all the active functions for a
step-down (buck) switching regulator, capable of
driving a 500-mA load current with excellent line and
load regulation. These devices are available in fixed
output voltages of 3.3 V, 5 V, 12 V, and an adjustable
output version.
Requiring
a
minimum
number
of
external
components, these regulators are simple to use and
include patented internal frequency compensation,
fixed frequency oscillator, external shutdown, soft
start, and frequency synchronization.
The LM2671 series operates at a switching frequency
of
260
kHz,
thus
allowing
smaller
sized
filter
components
than
what
is
required
with
lower
frequency switching regulators. Because of its very
high efficiency (> 90%), the copper traces on the
printed-circuit
board
are
the
only
heat
sinking
required.
A family of standard inductors for use with the
LM2671
are
available
from
several
different
manufacturers. This feature greatly simplifies the
design of switch-mode power supplies using these
advanced ICs. Also included in the data sheet are
selector guides for diodes and capacitors designed to
work in switch-mode power supplies.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM2674
SOIC (8)
4.90 mm × 3.91 mm
PDIP (8)
9.81 mm × 6.35 mm
WSON (16)
5.00 mm × 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application
For fixed output voltage versions


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