LTC1873EG#TRPBF

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The LTC1873EG#TRPBF is a useful voltage regulator that operates primarily in thePMIC (Power Management Integrated Circuit) market. It’s specifically in the Voltage Regulators – DC/DC Switching Controllers category. It’s used in many different electronic applications due to its versatility. In brief, the LTC1873EG#TRPBF is a DC/DC buck synchronous PWM switching controller. It offers fixed frequency operation between 500kHz and 1.3MHz and 0.22% reference voltage regulation accuracy. Below you can find a more in-depth look into the applications and working principles behind the device.

Applications:
The LTC1873EG#TRPBF can be used in different systems requiring high-efficiency, low voltage-drop or low ON-resistance power switches. These switches are typically used in flyback, buck, or boost topologies. It can be used in applications such as USB-PD, monitoring point-of-load (PoL), dc-dc converters and POL for FPGAs, ASICS, MEMS, etc. Other applications include high-performance microprocessors, high-end graphics cards. It can even be used for powering products that require battery backup such as some communication terminals.

Working Principles:

The LTC1873EG#TRPBF works as a synchronous DC/DC buck switching controller. It uses pulse width modulated (PWM) regulation methods to maintain constant output voltage. It also features very accurate, fixed-frequency pulse-width modulation. The fixed frequency range is between 500 kHz and 1.3 MHz. This enables operation with both MOSFETs and low impedance DC/DC conversion.

The output voltage of the LTC1873EG#TRPBF can be programmed via a resistor divider network, which is connected between the regulated output and the feedback voltage. If the output voltage exceeds the threshold reference voltage of 2.5V, the internal PWM comparator output is activated. This causes the internal power switch to switch OFF. The internal current limit can be set by using an external resistor across the current sense pins.

The LTC has many advanced features that reduce board space and help keep the overall system cost low. The device has an integrated Adaptive Dead Time Control (ADTC) circuit that provides high efficiency with a wide range of loads. The ADTC circuits maintain a low output voltage drop even with a heavily-loaded output. Additionally, the device includes an internal loop compensation network, allowing for ease of design without the need for an external loop compensation network.

The LTC1873EG#TRPBF can also be configured to operate in a synchronous rectified mode. This mode provides higher efficiency compared to a single PWM controller due to the reduced risk of shoot-through current. It also has integrated current-mode logic that enables improved load transient response and reduces control loop latency. The device also features a programmable dead short protection, which helps prevent damage due to short circuit events.

Overall, the LTC1873EG#TRPBF is a DC/DC buck synchronous PWM switching controller that is widely used due to its versatility in different application types. It provides fixed frequency operation with 0.22% reference voltage regulation accuracy. It has many useful features such as the integrated Adaptive Dead Time Control circuit, the current-mode logic, and the programmable dead-short protection. Together, these features enable the device to be used across a wide range of applications.

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