L6759D

PMIC - Voltage Regulators - Special Purpose

The L6759D is a special-purpose voltage regulator designed for low-dropout micropower operation. It is a high-efficiency solution for applications requiring low standby currents and fast transient responses. The device features a wide input voltage range of 3V to 7.5V, a low dropout voltage of 270mV, and is capable of delivering up to 200mA of output current. It also features high accuracy, low quiescent current, adjustable current and voltage limits, and over-temperature protection.

Features

• Wide input voltage range: 3V to 7.5V
• Low dropout voltage: 270mV
• Maximum output current: 200mA
• High accuracy and low quiescent current
• Adjustable current and voltage limits
• Over-temperature protection

Applications

The L6759D is well suited for low-power applications requiring high efficiency and fast transient response. Typical applications include battery-powered gadgets, MP3 players, cell phones, PDA’s, telecommunications equipment, and portable video game consoles. It can also be used in a wide range of other applications, such as automotive, industrial, and consumer.

Working Principle

The L6759D consists of an adjustable power-MOSFET and an error amplifier for feedback control. The output voltage is set by an external resistive divider connected to the device’s feedback pin. The regulator compares the voltage at this pin to an internal reference voltage. If the voltage at the feedback pin is lower than the reference voltage, the regulator turns on its power-MOSFET to increase the output voltage. If the voltage is higher than the reference voltage, the regulator turns off its power-MOSFET to decrease the output voltage. The load current is compared to a set limit. If the current exceeds the limit, the regulator will turn off its power-MOSFET to reduce the output voltage and current.

Conclusion

The L6759D is an ideal low-power voltage regulator for applications requiring high efficiency and fast transient response. It has a wide input voltage range and low dropout voltage, along with adjustable current and voltage limits and over-temperature protection. It is ideal for battery-powered gadgets, telecommunications equipment, portable electronics, and automotive, industrial, and consumer applications.