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LM2670T-5.0 数据表(PDF) 1 Page - Texas Instruments

部件名 LM2670T-5.0
功能描述  LM2670 SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with Sync
Download  36 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

LM2670T-5.0 数据表(HTML) 1 Page - Texas Instruments

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LM2670
www.ti.com
SNVS036J – APRIL 2000 – REVISED APRIL 2013
LM2670 SIMPLE SWITCHER® High Efficiency 3A Step-Down Voltage Regulator with Sync
Check for Samples: LM2670
1
FEATURES
DESCRIPTION
The LM2670 series of regulators are monolithic
2
Efficiency Up to 94%
integrated circuits which provide all of the active
Simple and Easy to Design with (Using Off-
functions for a step-down (buck) switching regulator
The-Shelf External Components)
capable of driving up to 3A loads with excellent line
150 m
Ω DMOS Output Switch
and load regulation characteristics. High efficiency
(>90%) is obtained through the use of a low ON-
3.3V, 5V and 12V Fixed Output and Adjustable
resistance DMOS power switch. The series consists
(1.2V to 37V) Versions
of fixed output voltages of 3.3V, 5V and 12V output
50
μA Standby Current When Switched OFF
version.
±2% Maximum Output Tolerance Over Full
The SIMPLE SWITCHER concept provides for a
Line and Load Conditions
complete design using a minimum number of external
Wide Input Voltage Range: 8V to 40V
components. The switching clock frequency can be
provided by an internal fixed frequency oscillator
External Sync Clock Capability (280kHz to
(260KHz) or from an externally provided clock in the
400kHz)
range of 280 kHz to 400 kHz which allows the use of
260 kHz Fixed Frequency Internal Oscillator
physically smaller sized components. A family of
−40 to +125°C Operating Junction Temperature
standard inductors for use with the LM2670 are
Range
available from several manufacturers to greatly
simplify the design process. The external Sync clock
provides direct and precise control of the output ripple
APPLICATIONS
frequency
for
consistent
filtering
or
frequency
Simple to Design, High Efficiency (>90%) Step-
spectrum positioning.
Down Switching Regulators
The
LM2670
series
also
has
built
in
thermal
Efficient System Pre-Regulator for Linear
shutdown, current limiting and an ON/OFF control
Voltage Regulators
input that can power down the regulator to a low
Battery Chargers
50
μA quiescent current standby condition. The output
voltage is ensured to a ±2% tolerance.
Communications and Radio Equipment
Regulator with Synchronized Clock Frequency
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
SIMPLE SWITCHER, Switchers Made Simple are registered trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 2000–2013, 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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