L4936E

Introduction

The L4936E is a step-up switch-mode power supply controller designed for portable applications. It is a very efficient and cost-effective solution for voltage regulation in which the input voltage varies widely, usually in the range of 2.5V to 6.5V. The L4936E provides an output voltage of 2.5V to 5.0V, with a maximum output current of 2.5A.The L4936E includes an integrated charge pump, an error amplifier, current limit and thermal protection for optimal performance and protection.

Application Field of L4936E

Most of the applications of the L4936E are portable and battery-powered devices, such as digital cameras, digital video cameras, MP3 players and mobile phone handsets. In addition, the L4936E is well suited for use in AC line-powered devices, such as notebook computers and LCD monitors, as an efficient solution for power conditioning.

Working Principle of L4936E

The L4936E consists of an integrated charge pump and two power transistors. The charge pump provides start up and peak current for the transistors. The two transistors are connected in series, thus providing a constant voltage output. The L4936E utilizes an internal error amplifier to monitor the output voltage, and adjusts the voltage accordingly. The L4936E is capable of automatically reducing the output current when the load current is too high. This prevents the device from overheating and ensures a stable output voltage.

Conclusion

The L4936E is a linear voltage regulator designed for portable and AC line-powered applications. It has an integrated charge pump, an error amplifier, current limit and thermal protection for optimal performance and protection. It is an efficient and cost-effective solution for voltage regulation in which the input voltage varies widely.