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LM2670SD-3.3 データシート(PDF) 1 Page - Texas Instruments |
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LM2670SD-3.3 データシート(HTML) 1 Page - Texas Instruments |
1 / 36 page 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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同様の説明 - LM2670SD-3.3 |
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