MCP1603T-150I/MC

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MCP1603T-150I/MC is a DC DC switching regulator designed by Microchip. It belongs on the PMIC - Voltage Regulators - DC DC Switching Regulators category. This device is a 3-pin SIP package integrated and requires no external components for output voltages of 3.3V, 5V and 12V. The device is also capable of delivering up to 150mA of sunk current, with low quiescent power, and features output current-limit protection and thermal shutdown.

Application Field

MCP1603T-150I/MC is best suited to providing a regulated voltage in current-limited conditions within low-power applications which require low quiescent current operations and high accuracy outputs. This device is specifically designed to be used in a wide range of small form factor and low-power applications such as hand-held electronics, portable medical equipment and battery-powered devices.

Working Principle

The MCP1603T-150I/MC is a mono-stable, current-mode switching regulator device. In its operation, the device uses a current-mode control loop to maintain a fixed voltage output with a choice of 3.3V, 5V or 12V and a specified output current (up to 150mA). The external components of the circuit, including the inductor and input capacitor, control the operating frequency of the switching device.

In order to regulate the output voltage and provide a constant current output, the device utilizes an internal Current-Mode-Controller (CMC) coupled with an Error Amplifier, a high voltage MOSFET switch, under-voltage lock (UVLO) and current limitation protection. The CMC is used to provide a comparison of the output voltage of the device and the target voltage of the output. The output voltage is then adjusted accordingly to maintain the desired output voltage. The internal high voltage MOSFET is turned on and off to maintain the output voltage and current.

In order to ensure robust thermal performance, the device features an over-current protection that triggers an internal MOSFET switch turn-off when the output current exceeds 150mA. An integrated thermistor can also be used to shut off the internal MOSFET and prevent thermal overload when the temperature of the device exceeds a predetermined level.

In addition, the device features a fast transient response and is able to quickly adjust the output voltage/current to maintain the output voltage. This ensures that the device is able to quickly respond to changes in the input voltage or output current to quickly maintain the desired output voltage/current.

Overall, the MCP1603T-150I/MC is an efficient, low-power and tiny size switching regulator device capable of providing a precise output voltage and current. It is highly suitable for a wide range of low-power applications, such as hand-held electronics, portable medical equipment, and battery-powered devices.

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