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LM2673SDX-5.0 Arkusz danych(PDF) 1 Page - Texas Instruments |
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LM2673SDX-5.0 Arkusz danych(HTML) 1 Page - Texas Instruments |
1 / 35 page = 37,125 RADJ I CL Voltage 5V/3A COUT 180 PF/16V 33 PH L Feedback Boost SR305 Ground Current VIN Softstart 1 nF Voltage 8V to 40V Input LM2673 - 5.0 Output Switch Output 0.01 PF + Limit Adjust 8.2k 0.47 PF + + CIN 2 x 15 PF/50V LM2673 www.ti.com SNVS030N – APRIL 2000 – REVISED APRIL 2013 LM2673 SIMPLE SWITCHER® 3A Step-Down Voltage Regulator with Adjustable Current Limit Check for Samples: LM2673 1 FEATURES DESCRIPTION The LM2673 series of regulators are monolithic 23 • 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 • Resistor Programmable Peak Current Limit and load regulation characteristics. High efficiency (>90%) is obtained through the use of a low ON- Over a Range of 2A to 5A resistance DMOS power switch. The series consists • 150 m Ω DMOS Output Switch of fixed output voltages of 3.3V, 5V and 12V and an • 3.3V, 5V and 12V Fixed Output and Adjustable adjustable output version. (1.2V to 37V) Versions The SIMPLE SWITCHER® concept provides for a • ±2% Maximum Output Tolerance Over Full complete design using a minimum number of external Line and Load Conditions components. A high fixed frequency oscillator • Wide Input Voltage Range: 8V to 40V (260KHz) allows the use of physically smaller sized components. A family of standard inductors for use • 260 KHz Fixed Frequency Internal Oscillator with the LM2673 are available from several • Softstart Capability manufacturers to greatly simplify the design process. • −40 to +125°C Operating Junction Temperature Other features include the ability to reduce the input Range surge current at power-ON by adding a softstart timing capacitor to gradually turn on the regulator. APPLICATIONS The LM2673 series also has built in thermal shutdown and resistor programmable current limit of • Simple to Design, High Efficiency (>90%) Step- the power MOSFET switch to protect the device and Down Switching Regulators load circuitry under fault conditions. The output • Efficient System Pre-Regulator for Linear voltage is ensured to a ±2% tolerance. The clock Voltage Regulators frequency is controlled to within a ±11% tolerance. • Battery Chargers 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. 3 All other trademarks are the property of their respective owners. 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. |
Podobny numer części - LM2673SDX-5.0 |
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Podobny opis - LM2673SDX-5.0 |
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