LTC3619EDD#PBF

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The LTC3619EDD#PBF is a step-down high-current DC-DC switching regulator which can deliver output currents up to 20A. It is a true high-efficiency monolithic regulator that provides maximum power delivery over a wide input voltage range. Additionally, the LTC3619EDD#PBF has a wide output voltage accuracy range of less than 1.6% over the entire temperature range. It also has an adjustable switching frequency to help reduce EMI/EMC issues.

Features of the LTC3619EDD#PBF include its small size and is ideal for applications where space is a premium. It is also optimized to minimize input and output ripple at light load conditions which is beneficial for noise-sensitive applications. Other features include excellent thermal performance, programmable soft-start, power-good signal and adjustable output voltage. The LTC3619EDD#PBF also utilizes synchronous rectifiers for high-efficiency designs.

The LTC3619EDD#PBF is primarily used in medium and large portable and desktop equipment that require high power and has a wide range of applications including PDAs, battery-powered office equipment, portable medical equipment, telecom/datacom applications, industrial equipment, and many more. In addition, it is also used in low-power requirements such as LED driver, wide-ranging distributed supplies, and PC motherboard.

The LTC3619EDD#PBF can be operated with a single input voltage of 4.0V to 18V DC, over the full temperature range. The device is designed to offer optimum efficiency over a wide input voltage range and uses a constant operating frequency to minimize EMI/EMC issues. The nominal switching frequency is adjustable from 100KHz to 1MHz, allowing for best-in-class switching frequency for ultra-low noise and improved efficiency.

The LTC3619EDD#PBF integrates an 85mOhm internal power switch for high-efficiency designs, allowing for a wide range of current ratings from 0.5A up to 20A, with the ability to support heavy-load applications. The device supports voltage mode control and can provide accurate programmed switching pulse width modulation (PWM) frequency, current-mode slope compensation, and CC-mode over-temperature protection. Its output voltage can be adjusted using an external resistor divider network, providing ±1.6%. It also features a programmable soft-start time of up to 1.6ms which is beneficial in reducing the inrush current to output capacitor during startup.

The LTC3619EDD#PBF features various features to facilitate a power system design. It has a power-good flag output which indicates the output voltage is within 10% of its target voltage. The device also integrates a programmable current double with a threshold current can be set between 10mA and 400mA. The DTC pin can be used to monitor the current conducting through the MOSFET switch, and it can also be used to implement a burst modeo or low-voltage operation.

In conclusion, the LTC3619EDD#PBF is a DC-DC switching regulator which offers excellent performance and high efficiency for portable and desktop applications with power requirements. With its adjustable frequency, programmable soft-start, power-good signal and accurate output voltage, the LTC3619EDD#PBF is well-suited for a wide range of applications. With its high-current internal switch, it also offers excellent current capability over a wide voltage range. In applications such as PDAs, battery-powered office equipment, portable medical equipment, telecom/datacom applications, industrial equipment, and many more, the LTC3619EDD#PBF is the ideal device to provide reliable and efficient power supply.

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