LM2676S-ADJ/NOPB

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The LM2676S-ADJ/NOPB is a monolithic integrated synchronous switching regulator that is specifically designed to have an overall efficiency of 90% or greater. It is a PMIC - Voltage Regulators - DC DC Switching Regulator, and it has been designed to operate over a wide range of input and output voltages while maintaining a high level of performance. In addition to providing a reliable supply of power, the LM2676S-ADJ/NOPB also offers a low noise and low ripple design, a current limit protection feature, and thermal shutdown.

The application field of LM2676S-ADJ/NOPB can span from precision voltage regulation to high frequency dc-dc conversion, and it is suitable for use in a wide range of power applications including telecom power, motor control, robot control, and portable systems.

The working principle of LM2676S-ADJ/NOPB is based on a pulse width modulation (PWM) modulation technique with a constant on-time control approach. This approach is robust and does not require loop compensation making the regulator suitable for a range of applications that require a wide variety of load current and line regulation. The PWM switching technique is enabled by a clock frequency of up to 250kHz, and it is further regulated by a high-speed wide range error amplifier.

The voltage output is programmed by an external resistor connected from the adjustable output pin (Feedback Pin; FB) to the output voltage pin (INTVCC). The voltage level at FB is proportional to the output voltage and is compared with an internal voltage reference (VREF) in order to regulate the output voltage. A soft-start feature ensures a smooth start-up of the device at turn-on, and a power up disable option allows for the output to be disabled until the regulator reaches the preset voltage.

The LM2676S-ADJ/NOPB is protected from both output overvoltage conditions and thermal overload. The output overvoltage protection (OVP) circuit monitors the output voltage and switches off the device if the output voltage exceeds 27V. The thermal protection circuit will shut the device down if the junction temperature exceeds 150°C. The device also features a current limit protection, which is designed to limit the maximum output current to 10A.

In summary, the LM2676S-ADJ/NOPB is an efficient, low noise, and low ripple voltage regulator, designed to provide a reliable power supply for a wide range of applications. The PWM switching technique, the high-speed wide range error amplifier, the overvoltage protection circuit, and the thermal protection circuit, allows it to match a wide variety of power requirements, while keeping the device safe from any damage.

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