MIC23201YML-TR

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The MIC23201YML-TR is a highly efficient, step-down DC-DC converter specifically designed for handheld and other low-power applications. It operates from a wide input supply range of 2.7V to 5.5V, and can deliver up to 1A of continuous output current over a wide temperature range of -40℃ to +125℃. The device offers a combination of high efficiency, low quiescent current, accurate and fast load-transient response, and low EMI, all in a small, space-saving package footprint.

Application fields and working principle

The MIC23201YML-TR is an ideal choice for addressing the needs of consumer, communication, and industrial applications. Popular application fields include:

• Portable consumer electronics
• GPS receivers
• MP3 players, audio amplifiers and cell phones
• Bluetooth and Wi-Fi transmitters and receivers
• Industrial and automotive control systems

The MIC23201YML-TR is a fully integrated, high-efficiency DC-DC synchronous buck converter with a wide 2.7V to 5.5V input voltage range and a single output voltage. The high switching frequency allows its use in a small form factor. The MIC23201YML-TR features an internal feedback resistors which allows it to be configured in either voltage mode or current mode. The feedback resistors also provide a Power Good signal assertion once the output voltage has stabilized.

The core of this DC-DC switching regulators is based on a PWM controller and power switches (MOSFET). The PWM controller includes an internal high-side MOSFET driver, an oscillator and the PWM error amplifier. The power switches are typically external N-MOSFETs which are driven by the high-side MOSFET driver. The oscillator sets the switching frequency and the error amplifier maintains the feedback voltage constant by comparing it to the reference voltage.

The internal Power Good (PG) output will indicate when the output voltage has stabilized, and the soft start control input allows users to control the initial output voltage rise rate. Moreover, the device includes various protection features such as input under-voltage lockout (UVLO), current limit, over-temperature protection (OTP), short-circuit detection, and output thermal over-load protection.

The MIC23201YML-TR packages a highly integrated solution with a wide input voltage range, low quiescent current, and high efficiency – all in a space saving SOT-23-5 package, making it the ideal choice for embedded applications with space constraints.

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