LM3670MFX-1.875/NOPB

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Modern power management technology is now becoming increasingly complex. Power converter is one of the core components of electronic device therefore, and one of the most important components is the voltage regulator. LM3670MFX-1.875/NOPB, an example of DC DC switching regulators, is a step-up DC-DC regulator belonging to a family of modern voltage regulators. This article will discuss about the application field and working principle of LM3670MFX-1.875/NOPB.

Application Fields

LM3670MFX-1.875/NOPB is a low quiescent current, high efficiency, wide input voltage step-up DC-DC converter suitable for a variety of portable battery-powered applications. It is highly suitable for applications in cell phones, medical devices, monitoring systems, data communication, battery powered instrumentation and portable device etc.Product features include input voltage up to 6V and a wide output voltage range up to 5V with ±2% accuracy. Programming of the output voltage is extremely simple, with a single resistor providing the desired voltage.

Working Principle

The LM3670MFX-1.875/NOPB contains all the active circuitry needed to implement step-up DC–DC converter. An over current protection limit is provided by a current sensing resistor and signal conditioning circuitry. This signal is monitored and compared with the programmed threshold. If the signal exceeds this limit, the controller will reduce the load until the current load is within the safe operating area. The LM3670MFX-1.875/NOPB also provides a sleep mode and a power up/down control logic.The voltage regulator is based ona synchronous buck topology, and this is driven by an internal oscillator. A diode bridge is used on the input side to provide protection against transient during power on and off, as well as reverse current. The voltage feedback is applied to an internal error amplifier that maintains the regulated output voltage.

The controller also contains an enable pin to completely shut down the circuit in the quiescent state. The enable pin is compatible with logic level, simply connecting it to ground will enable the circuit, while an open drain connection will disable the circuit.The LM3670MFX-1.875/NOPB is able to provide high output current at high efficiency due to its synchronous topology. This makes it highly suitable for applications, where a high efficiency is required. The output is adjustable, and the device is protected from over current and over temperature conditions.

Conclusion

In summary, the LM3670MFX-1.875/NOPB is an example of a voltage regulator, suitable for a variety of portable battery-powered applications. The device is based on a synchronous buck topology, and provides a high output current at high efficiency. It is also protected from over current, over temperature and transient conditions. This makes the LM3670MFX-1.875/NOPB a highly efficient and reliable voltage regulator suitable for a wide range of portable device and system applications.

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