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> LM2679 -t power switching regulator ic, 2-40V 5A qty:3
LM2679 -t power switching regulator ic, 2-40V 5A qty:3
Qty: 3 LM2679 -T-ADJ 7 pin TO220
Switching Step-down voltage Regulator
(Higher voltage part also available)
High efficiency: Achieve high-current step-down with little heat.
Ripple frequecies easily filtered with low-value components.
(Full Application schematics in data sheet)
The LM2679 -XX are integrated circuits which provide all of the active functions for a step-down (buck) switching regulator capable of driving up to 5A loads with excellent line and load regulation. High efficiency (>90%) is obtained through the use of a low ON-resistance DMOS FET power switch. The series consists of fixed output voltages of 3.3V, 5V and 12V and an adjustable output version.
This IC is the ADJUSTABLE 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. A family of standard inductors for use with the LM2679 are available and can be supplied on request when quantities permit.
Other features include the ability to reduce the input surge current at power-ON by adding a softstart timing capacitor to gradually turn on the regulator. The LM2679 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.
