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LM2678SX-5.0 датащи(PDF) 1 Page - Texas Instruments

номер детали LM2678SX-5.0
подробное описание детали  LM2678 SIMPLE SWITCHER짰 High Efficiency 5-A Step-Down Voltage Regulator
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LM2678SX-5.0 датащи(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.
LM2678
SNVS029J – MARCH 2000 – REVISED JULY 2016
LM2678 SIMPLE SWITCHER® High Efficiency 5-A Step-Down Voltage Regulator
1
1 Features
1
Efficiency Up to 92%
Simple and Easy to Design Using Off-the-Shelf
External Components
120-mΩ DMOS Output Switch
3.3-V, 5-V, and 12-V Fixed Output and Adjustable
(1.2 V to 37 V) Versions
50-μA Standby Current When Switched OFF
±2% Maximum Output Tolerance Over Full Line
and Load Conditions
Wide Input Voltage Range: 8 V to 40 V
260-kHz Fixed Frequency Internal Oscillator
−40 to 125°C Operating Junction Temperature
Range
2 Applications
Simple-to-Design, High Efficiency (>90%) Step-
Down Switching Regulators
Efficient System Preregulator for Linear Voltage
Regulators
Battery Chargers
3 Description
The LM2678 series of regulators are monolithic
integrated circuits which provide all of the active
functions for a step-down (buck) switching regulator
capable of driving up to 5-A loads with excellent line
and load regulation characteristics. High efficiency
(>90%) is obtained through the use of a low ON-
resistance DMOS power switch. The series consists
of fixed output voltages of 3.3 V, 5 V, and 12 V and
an adjustable output version.
The SIMPLE SWITCHER® concept provides for a
complete design using a minimum number of external
components.
A
high
fixed
frequency
oscillator
(260 kHz) allows the use of physically smaller sized
components. A family of standard inductors for use
with
the
LM2678
are
available
from
several
manufacturers to greatly simplify the design process.
The
LM2678
series
also
has
built-in
thermal
shutdown, current limiting, and an ON/OFF control
input that can power down the regulator to a low 50-
μA quiescent current standby condition. The output
voltage is ensured to a ±2% tolerance. The clock
frequency is controlled to within a ±11% tolerance.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM2678
TO-263 (7)
10.10 mm × 8.89 mm
TO-220 (7)
14.986 mm × 10.16 mm
VSON (14)
6.00 mm × 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application


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