PM6681A

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PM6681A is a multi-function voltage regulator that is most suitable for use in current- and voltage-sensitive power circuits. It is primarily used in applications such as computers, LED displays, and telecommunication systems. It is also used in PDA, cellular phone, and multimedia devices.

PM6681A is part of the PMIC (Power Management Integrated Circuit) family of products manufactured by Philips Semiconductor. This type of device is used to regulate, or manage the power flow in electrical and electronic circuits. PMICs typically contain a number of voltage regulators and other controllers that provide a range of power management functionality.

The PM6681A has two functions - Linear and Switching Voltage Regulators.

Linear Voltage Regulator

A linear voltage regulator is the simplest form of voltage regulator. It is a single-stage device which takes input from a higher voltage source and outputs a steady, regulated voltage at a level determined by a reference voltage. The linear regulator does this by comparing its output voltage to a reference voltage and adjusting its output voltage accordingly. The reference voltage can be set to a specified value or can be adjusted with an adjustable device.

Linear regulators contain two transistors - a pass transistor and a control transistor. The pass transistor acts as a switch which is used to regulate the flow of current. When the output voltage reaches the predetermined level, the control transistor turns off the pass transistor, preventing any further current flow. When the output voltage drops below the predetermined level, the control transistor turns on the pass transistor, allowing current to flow again.

The PM6681A linear regulator has a maximum output current of 1.5A and has an input voltage range of 4V to 28V. It features adjustable current limit, over temperature protection and short circuit protection.

Switching Voltage Regulator

Switching voltage regulators are more complex than linear ones and can offer greater efficiency as they are able to work at higher input voltages. They work by using a switch to turn the output power supply on and off. When the switch is on, the output voltage is set to a constant level, and when the switch is off, no current flows. A feedback system is used to control the switch so that the output voltage stays constant. The feedback system monitors the output voltage, and if it senses that the output voltage is too low, it turns the switch on; if it senses that the output voltage is too high, it turns the switch off.

The PM6681A switching regulator has a maximum output current of 600mA and has an input voltage range of 4V to 28V. It features adjustable slew rate, adjustable current limit, over temperature protection, under voltage lockout and short-circuit protection. It is designed for a wide range of applications, including computing, communications, consumer and industrial electronics.

PM6681A is a multi-function voltage regulator that is most suitable for use in current- and voltage-sensitive power circuits. It is part of the PMIC family of products manufactured by Philips Semiconductor, and it has two functions - Linear and Switching Voltage Regulators. The linear regulator has a maximum output current of 1.5A and has an input voltage range of 4V to 28V, while the switching regulator has a maximum output current of 600mA and has an input voltage range of 4V to 28V. Both regulators feature adjustable current limit, over temperature protection, under voltage lockout and short-circuit protection.

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