MP2361DK-LF-Z

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The MP2361DK-LF-Z (MP2361) is a DC/DC switching regulator controller which requires only an external coil and a few optional components to deliver a low ripple, fast transient response voltage output. It is a high-performance, cost-effective regulator solution for applications such as portable device charging, power management for hand-held equipment, automotive circuitry and embedded computing. This article will explore the MP2361’s Application Fields and Working Principle.

Application Fields

The MP2361 is suitable for high-frequency DC/DC buck switching regulators with a wide input voltage range of 4 V to 40 V. Applications for the MP2361 include portable device charging, power management for hand-held equipment, automotive circuitry and embedded computing.

• Portable device charging: The MP2361 is used in charging applications for portable devices that require a low ripple, fast transient response output voltage such as laptop and mobile device chargers. The device has an input voltage range of 4 to 40 V, allowing it to be used in both AC and DC inputs.
• Power Management for Hand-held Equipment: The MP2361 is suitable for power management of hand-held devices such as drones and remote controls. Its high-frequency switching capability helps to reduce component count and size, allowing for smaller and lighter systems.
• Automotive circuitry: The MP2361 is used in automotive circuitry applications such as automotive instrumentation and interior lighting. Its wide input voltage range of 4 V to 40 V enables it to be used with both 12V and 24V automotive systems.
• Embedded computing: The MP2361 is used in embedded computing applications such as industrial automation systems, controller boards, and telecommunication equipment. Its fast transient response and low output ripple ensure reliable and stable operation.

Working Principle

The MP2361 is a fixed frequency DC/DC switching regulator controller designed for buck topology. It operates by delivering a regulated output voltage (Vout) from a varying input voltage (Vin). To achieve this, the MP2361 first rectifies the input voltage (Vin), which is then subject to Pulse width modulation (PWM). The PWM signal is regulated in order for the output voltage to be maintained at the desired level.

The MP2361 employs an internal voltage reference and error amplifier to regulate the output voltage. It also uses a PWM comparator to compare the internal voltage reference and the actual voltage at the output. If the difference is greater than a certain threshold, the PWM pulse width is adjusted to regulate the output voltage. The pulse width is inverted if the output voltage is lower than the reference voltage and vice versa. This feedback loop works together to ensure that the output voltage is kept within the required tolerance.

Another important feature of the MP2361 is the internal Shutdown feature, which turns the output off when the input voltage falls below a certain level. This feature prevents the device from being damaged in the event of a voltage drop.

The MP2361 is a highly integrated device that requires only an external coil and a few optional components to create a low ripple, fast transient response voltage output. Its high-performance and cost-effectiveness make it an ideal choice for a variety of buck switching regulators, doing everything from portable device charging to powering hand-held equipment to automotive circuitry and embedded computing.

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