LTC3823EGN#TRPBF

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The LTC3823EGN#TRPBF is a 3-phase interleaved, non-synchronous buck current-mode controller specifically designed to increase the current density of point-of-load (POL) regulators. Operating over a wide input voltage range of 4.5V to 38V, this device provides smooth output current pulse-by-pulse current limit controlled transitions for excellent dynamic load response. An internal Maximum Duty Cycle setting option allows for maximum current density performance. This device is a low-cost, high-performance controller for POL converters.

The LTC3823EGN#TRPBF is part of the family of DC-DC switching controllers from PMIC (Power Management IC) voltage regulator solutions from Linear Technology. It is ideal for a wide range of power management designs, such as distributed power architectures for communications, storage, industrial, computing and consumer electronics applications. The device is offered in an 8-pin UDFN package (3 mmx3 mm).

The switching frequency of the DC-DC switching controller is programmed with an external resistor and one internal resistor. The minimum value of both resistors is set by internal precision references. The LTC3823EGN#TRPBF offers wide synchronization frequency range of 200kHz to 800kHz which can be programmed via two external resistors and synchronized to an external clock. The device allows for pulse-by-pulse current limit control to provide an excellent dynamic load response. Furthermore, the device includes an internal maximum duty cycle setting, which allows the designer to reduce inductor size and crossover ripple and yet maintain a highest possible efficiency.

The LTC3823EGN#TRPBF also features a remote sense feature for current sharing between parallel branches and a third resistor that controls the slope compensation for the current mode control loop. The remote sense feature ensures correct current sharing during active load sharing mode, and during transient conditions in each branch. Furthermore, the device allows for seamless transition between current sharing and individual independent output operations. This feature ensures the best noise performance, highest system efficiency and fast transient response.

The LTC3823EGN#TRPBF offers protection features including an adjustable, noise-filtered UV/OV voltage protector and an adjustable over-temperature shutdown. The device also provides an undervoltage lockout circuit and active discharge that prevents the output node from being pulled above the ground. Additionally, the device includes adjustable soft-start, user selectable resistor fault detect and an active output pull-down during shutdown. The active output pull-down but also prevents accidental start-up during a power on reset event.

In terms of its working principle, the LTC3823EGN#TRPBF contains a voltage error amplifier, a transconductance error amplifier, and a high-side drive current source with OVP. The voltage error amplifier senses the output voltage and the transconductance error amplifier senses the output current and together they control the high-side gate driver current. The feedback loop regulates the output voltage according to the sum of the reference and feedback voltages. The OVP feature monitors the upper MOSFET voltage and shuts off the internal gate drive current under conditions such as over voltage, short-circuits, or abnormal loads. The LTC3823EGN#TRPBF also includes a disconnect signal, minimizing the output power on shutdown, which would have been dissipated on the upper MOSFET otherwise.

Overall, the LTC3823EGN#TRPBF is an ideal solution for increasing the current density of point-of-load (POL) regulators and offers features such as wide synchronization frequency range of 200kHz to 800kHz, remote sense feature for current sharing between parallel branches, adjustable soft-start, user selectable resistor fault detect, and an adjustable, noise-filtered UV/OV voltage protector. This device provides a low-cost, high-performance controller for POL converters and is ideal for a wide range of power management designs.

The specific data is subject to PDF, and the above content is for reference