LV5857MX-TLM-H Datasheet/PDFLV5857MX-TLM-H
LV5857MX-TLM-H is a DC DC switching regulator belonging to PMIC - Voltage Regulators. It utilizes a exact core voltage-mode controller and a high-speed power MOSFET, allowing for higher efficiency and minimal no-load current during Standby Mode. It can also control Light Load mode, with adjustable switching frequency from 1MHz to 2MHz, allowing for lower output noise, enabling even more compact designs.
Application Field
LV5857MX-TLM-H is a mutli-purpose DC DC switching regulator. It can be used in various kinds of applications and scenarios, such as Battery Powered Portable Devices, Automotive Electronics, Telecommunications and Industrial Equipment.
Working Principle
LV5857MX-TLM-H is based on a voltage-mode controller that enables fixed input-output voltage operations and near-perfect transient responses. The primary conversion stage utilizes a power MOSFET in pulse width modulation (PWM) controller, while the secondary stage consists of an adjustable pulse width modulation (PWM) switching regulator.
The output voltage DC-DC converter regulates the output voltage through the secondary stage. The feedback pin is used to set the output voltage, while the voltage sense pin is used to regulate the output voltage of the DC-DC converter. The automatic power-save mode allows for power efficiency especially in light load conditions, when the output voltage is low, the switching frequency of the output-regulating FET is reduced.
In addition, LV5857MX-TLM-H has other features such as over current and over voltage protection, automatic power-save mode, adjustable switching frequency and temperature protection with hysteresis. All these features provide extra levels of protection for the device and the user, increasing the product’s reliability.
Conclusion
In conclusion, LV5857MX-TLM-H is a multi-purpose DC DC switching regulator, suitable for a wide range of applications. Its core voltage-mode controller and high-speed power MOSFET provide higher efficiency and minimal no-load current during Standby Mode. The adjustable switching frequency from 1MHz to 2MHz allows for lower output noise, enabling even more compact designs. Moreover, Over Current and Over Voltage protection, Automatic Power-Save Mode and temperature protection with hysteresis make of it a high-reliability product.