LTC3773EUHF#TRPBF

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The LTC3773EUHF#TRPBF is a DC/DC switching controller with a primary side high-frequency current mode control (FCCM) feature, which is closely associated with PMIC - Voltage Regulators - DC DC Switching Controllers classification. The device allows synchronous rectification and programmable switching frequency from 1 kHz to 840 kHz, it intends to provide precision current mode operation. In addition, the device comprises an internal VCC regulator and an internal high gain, error amplifier for reference tracking.

The working principle of the LTC3773EUHF#TRPBF can be described as follows. In normal operation, the PWM, pulse-width modulated, comparator determines the PWM switching period and is programmed by the RT (on-time) pin voltage. With the same RT voltage setting, the LTC3773EUHF#TRPBF utilizes different duty cycles by controlling the oscillator and the associated modulating DAC range. This unique control method superior the traditional duty cycle control approach in which no adjustment of on time can be made. Here, the DR pin voltage, the average slope compensation of the error amplifier, can be used to adjust the oscillator cycle so that the RT voltage and the ramp voltage, derived from the error amplifier, can be accurately matched.

The device comes with many features, such as differential pins sensing, accurate high-side current sensing using primary high-frequency current mode control (FCCM), ultra-low operating current and very low shutdown current, integrated VCC regulator for a true soft-start or run-time adjustment, Power Good flag, and programmable current limit. It also comprises over-voltage protection (OVP) via a maskable current limit threshold option.

LTC3773EUHF#TRPBF has many different application fields. The device is mainly applied in power converter circuits, including offline AC/DC, DC/DC, and DC/AC converter circuits. With its FCCM feature, the device is suitable for applications where very accurate current-mode operation and highly efficient synchronous rectification is needed. Furthermore, the device is widely used in various applications, such as servers, storage, storage peripherals, in AC/DC adapter, USB Type-C PD3.x, GPU, Memory and Core VRMs, low-cost automation, point-of-load (POL) converters and telecom.

The LTC3773EUHF#TRPBF is an example of the best programmable DC/DC switching controller, optimized for use in high performance and high efficiency synchronous rectification applications. Its superior features and superior operation can ease many of the design challenges and allow for more efficient and robust solutions for different applications in PMIC - Voltage Regulators - DC DC Switching Controllers.

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