MIC5319-1.8BML-TR

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The MIC5319-1.8BML-TR is a Linear Voltage Regulator, belonging to the larger Power Management IC (PMIC) family. This particular regulator includes a 30V break-over source and a 10V break-over sink voltage limit and is designed for Portable Media Players, as well as other Portable Consumer Electronics.

The MIC5319-1.8BML-TR uses a Rail-to-Rail design, allowing it to support output voltages of 1.3V to 8V. It also has a feedback resistor ratio of ∼1, allowing it to provide a flat output voltage tolerance of ±2.7% over the temperature range of -40°C to 85°C. Additionally, this voltage regulator does not require a minimum output to operate and will start up with output voltages exceeding 0V.

The regulator also includes a voltage tracking feature that enables the output voltage to be programmed over a prescribed voltage range. This voltage tracking feature allows the unit to be used in applications where multiple output voltages are needed and can be programmed by an external voltage divider network. Additionally, the MIC5319-1.8BML-TR includes a 3.2μA in-line quiescent current and a 1.7μA load disconnect, ensuring low power consumption in low power applications. It also supports a 0.6ms ON/OFF enable control with a minimum 10ms enable control turn-off time.

The MIC5319-1.8BML-TR features Protection features including an Over-Temperature Protection (OTP) that shuts down its output when the junction temperature exceeds its setpoint, as well as a built-in Thermal Shutoff (TSO) that activates when the regulator reaches its thermal limitation. The MIC5319-1.8BML-TR also has a Programmable Over-Voltage Protection (OVP) that ensures the output is not damaged should the output voltage exceed its predetermined limit.

The MIC5319-1.8BML-TR is well-suited for use in a variety of applications, including Portable Media Players, Medical Instruments and Equipment, Wearable Devices, Optocouplers and Motor Drivers. Additionally, it can be used in high efficiency power supplies and multiple output systems. It is available in a surface mount package and offers superior thermal cycling capability and reliability.

The MIC5319-1.8BML-TR is capable of delivering a maximum output current of 50mA while maintaining a stable operating temperature. The voltage regulator requires an input voltage range from 1.5V to 10V and incorporates a 0.6mV/v temperature coefficient in order to accurately control the output voltage. The continuity monitoring circuit inside the regulator also provides system-level protection for output shorts.

The working principle of the MIC5319-1.8BML-TR is based on the flow of current, which is regulated by variable impedance. The Impedance of the variable element is controlled by the feedback voltage, which is the voltage between the voltage reference (REF) pin and the feedback pin (FB). The REG output pin regulates the associated circuit components by applying the appropriate voltage to deliver the current. The adjustable current-limit circuitry also prevents current overload by limiting the output current at high current levels.

In addition, the MIC5319-1.8BML-TR includes current-foldback circuitry which reduces the output current during Overload conditions, protecting the load and the regulator itself. Additionally, the device offers short-circuit protection, protecting the internal components from excessive currents. It also includes a voltage margining capability that allows the output voltage to be adjusted up or down in fine increments, ensuring the output voltage remains within the specified range.

The MIC5319-1.8BML-TR is a reliable and cost effective solution for Portable Media Players, Medical Instruments and equipment, and other Portable Consumer electronics. It is designed to provide superior thermal cycling capability, improved protection features, and programmable output voltage tracking capabilities, making it the ideal voltage regulator for low power applications.

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