MIC261201YJL-TR

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The MIC261201YJL-TR is a wide input, high-efficiency, 4A step-down, DC-DC switched regulator from Microchip Technology Inc. It has been developed to provide efficient, small, and low-cost solutions to a wide range of power management applications. The MIC261201YJl-TR is a 5V or 3V adjustable output voltage regulator and requires minimal external components for integrated solutions with high output current.

The MIC261201YJL-TR belongs to the PMIC Voltage Regulators family of DC DC Switching Regulators. It includes a 2.5V to 5.5V fixed input voltage and a 4A output step-down regulator with low ripple, high efficiency, and small package size. The MIC261201YJL-TR regularly supports up to 5.5V of input voltage and provides a 4A continuous current output over its entire input range.

The MIC261201YJL-TR features output voltage precision of ±1.5% typical over the temperature range of 0 ℃ to 125 ℃. It has a fast transient response (1A/μs) and a low operating current (<1000μA). The device also features an internal soft-start and over-current protection. The MIC261201YJL-TR switch has a wide operating frequency range of 200kHz to 2MHz for maximum design flexibility.

The main application field of the MIC261201YJL-TR are as follows:

• Battery charger
• Automotive power management
• System controllers
• Power supply arrangement for SOI Processors
• Adapter power supplies

The working principle of the MIC261201YJL-TR is based on the concept of switched mode power supplies. This type of DC-DC converter topology is becoming increasingly popular as they are more efficient and require fewer components than other converter topologies. The MIC261201YJL-TR contains a chopper, a diode, and a MOSFET and works by switching the MOSFET off and on at a fast rate to regulate the output voltage.

When the MOSFET is switched on, the internal inductor current increases and the output voltage is ramped up. When the MOSFET is switched off, the internal inductor current is forced to switch paths and the output voltage is regulated. The MIC261201YJL-TR also uses a synchronous rectifier for improved efficiency which eliminates the diode losses associated with the traditional switching power supply design.

The MIC261201YJL-TR also provides an enable pin to control the enable state of the device. The enable pin can be used to reduce stand-by current and start-up time. The MIC261201YJL-TR can also be used in power supply tracking applications since it provides voltage tracking and output voltage adjustability.

In summary, the MIC261201YJL-TR is a wide input, high-efficiency, 4A step-down DC-DC switching regulator designed for a wide range of power management solutions. It operates over a wide input voltage range and provides a 4A continuous output current. The MIC261201YJL-TR features an adjustable output voltage, precision (±1.5%), fast transient response, low operating current and an internal soft-start and over-current protection. It is ideal for automotive, battery charger and system controller applications.

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