MIC5501-1.8YMT-T5

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MIC5501-1.8YMT-T5 Application Field and Working Principle

The MIC5501-1.8YMT-T5 is an integrated, low quiescent current, low-dropout linear regulator designed to provide up to 1.6 A of load current. The device offers an excellent combination of low dropout voltage, fast transient response, high output current, very low quiescent current, and low noise. The MIC5501-1.8YMT-T5 is a member of the MIC5500 family of integrated fixed and adjustable regulators. The device is optimised for very-low dropout performances, allowing it to operate from a wide range of input voltages.

The MIC5501-1.8YMT-T5 is a member of the MIC5500 family of integrated fixed- and adjustable linear regulators, featuring a low dropout voltage of 200 mV. The device is designed to provide ultra-low quiescent current and low noise operation. The MIC5501-1.8YMT-T5 offers excellent transient response and very low output ripple. It also features over-temperature protection, over-current protection, a reset output, and a selectable power-down mode.

The MIC5501-1.8YMT-T5 is used in automotive applications, such as motor control, battery management systems, mobile device charger applications, routers, and switches, as well as in general purpose voltage regulator applications. The device is also suitable for other applications that require linear regulation.

The MIC5501-1.8YMT-T5 regulator uses an additional pull-down transistor to reduce the voltage at the output node and thus increase the output current capability. This pull-down transistor also serves as an current limiting device by providing an over-current protection. The MIC5501-1.8YMT-T5 also features a selectable power-down mode, allowing the device to be placed in a low power state and then woken up with a logic signal.The device also features a reset output, which can be used to reset a microcontroller or other circuitry.

The MIC5501-1.8YMT-T5 linear regulator operates from an input voltage between 4.5V and 45V and delivers an output voltage from 0.6V up to 36V. It utilizes a two-stage charge pump reference that provides greater stability, faster start-up time, and faster line/load transient response than has typically been achievable using PNP biasing for reference regulation.

The control circuit on the MIC5501-1.8YMT-T5 utilizes pulse-width modulation (PWM) to provide excellent line/load transient response and fast transient response. The device offers a very-low ground current of 1.2μA and a quiescent current of only 80μA, which is significantly lower than competing devices. The device is packaged in a tiny SOT-23-5 package and is designed to operate over the temperature range of -40°C to 85°C.

In conclusion, the MIC5501-1.8YMT-T5 is an integrated, low quiescent current, low-dropout linear regulator designed to provide up to 1.6 A of load current. The device offers an excellent combination of low dropout voltage, fast transient response, high output current, very low quiescent current and low noise. It is suitable for automotive and general purpose voltage regulator applications and is available in a tiny SOT-23-5 package.

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