NATIONAL SEMICONDUCTOR -LM2673 SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current Limit handbook
Update: 29 September, 2023
The LM2673 series is a monolithic integrated circuit that provides all of the active functions for a step-down (buck) switching regulator capable of driving up to 3A 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 3.3V, 5V and 12V 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 (260KHz) allows the use of physically smaller sized components. The ability to reduce the input surge current at power-ON by adding a softstart timing capacitor to gradually turn on the regulator. The LM2673 series also has built-in thermal shutdown and resistor programmable current limit of the power MOSFET switch to protect the device and load circuitry under fault conditions. The output voltage is guaranteed to a ±2% tolerance. The clock frequency is controlled to within a ±11% tolerance.
Brand: National
File format: PDF
Size: 433 KB
MD5 Checksum: 086CD2021BF740D5C2ECAB5D55E55C34
Publication date: 03 May, 2012
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