LM2673T-12/NOPB

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LM2673T-12/NOPB is a non-isolated monolithic step-down switching regulator which contains all of the necessary active components to able to construct extremely efficient low voltage DC-DC converter in a compact surface-mount package. It is covered under the PMIC - Voltage Regulators - DC DC Switching Regulators categorization. It operates in the range of 9 V to 52 V and features adjustable output voltage from 0.6 V to the input rail. The switching frequency of the device is typically 1.5 MHz.

The key feature of the LM2673T-12/NOPB is that it provides a wide input voltage range, constant switching frequency and adjustable output voltage. As compared to Linear regulators, the device greatly reduces the power dissipation and the volume of the system is much smaller. The device also comes with other features such as current limit protection, short-circuit protection, thermal shutdown, hysteresis, soft start etc. The temperature range of the device can go up to a maximum of -40°C to 85°C.

Working Principle

The LM2673T-12/NOPB has an oscillator with an adjustable frequency that determines the switching frequency. The output of the oscillator is connected to the base of an NPT transistor that act as a switch. When the device is switched on, the NPT transistor is switched on and acts as a connection between the input and output voltages. This allows the current to flow and then applied to a feedback signal for the output voltage, which is then sent back to the oscillator for a feedback loop regulation.

The typical output current for the LM2673T-12/NOPB is 12 A, with a maximum of 15 A being output. The device has a PWM design and requires an external control signal to regulate the output voltage. When the device is operated in the fixed frequency, the output voltage is programmable with the help of two external resistors. The device also has an adjustable operating frequency, which can be adjusted between 1�100 kHz.

Application

The LM2673T-12/NOPB is suitable for a wide range of applications such as wide voltage range, remote control applications, PoE (Power-over-Ethernet), laptop chargers, battery charger, DC to DC converters, medical equipment, industrial automation and communication equipment. The device is also suitable for use in automotive and consumer electronics application.

Given its impressive range of features and wide range of applications, the LM2673T-12/NOPB is a highly versatile device and provides great flexibility for DC to DC converter design.

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