LTC3839IUH#PBF

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The LTC3839IUH#PBF is an integrated DC–DC controller and gate driver IC, specifically designed for synchronous step-down voltage regulation in a wide range of applications. This IC supports up to 8V to 36V input ranges, with an adjustable output voltage from 0.8V to the input voltage. It offers some design flexibility engineering designers appreciate, including programmable frequency, cycle-by-cycle current limit, adjustable soft-start and adjustable dead time. The LTC3839IUH#PBF is the ideal choice for point-of-load regulators in server and telecom equipment, as well as low-voltage high-current analog/mixed-signal linear voltage regulators.

The Linear Technology corporation has designed the LTC3839IUH#PBF for regulating the output voltage of DC–DC converters. This device is an integrated dc-dc controller and gate driver IC specifically designed for synchronous step-down voltage regulation. The LTC3839IUH#PBF features an 8V to 36V operating input voltage range and an adjustable output voltage from 0.8V to the input voltage. It offers a convenient set of integrated bias and protection features, including programmable frequency, cycle-by-cycle current limit, adjustable soft-start, and adjustable dead time.

The LTC3839IUH#PBF can be used in computer systems, distributed power systems, and switch mode supply (SMPS) applications. It also supports portable laptops and medical application designs. The LTC3839IUH#PBF is ideal for point-of-load regulators in server and telecom equipment and low-voltage high-current analog/mixed-signal linear voltage regulators.

The device\'s oscillator frequency range comprises of 200kHz to 1.2MHz and can be selected to match the application\'s switch frequency and transformer size. An additional low-frequency mode is available, which operates the device in the range of 40kHz to 160kHz, at a reduced switching frequency. It enables overall system cost savings due to reduced inductor and capacitor sizes.

The LTC3839IUH#PBF gate driver delivers up to 2A peak gate drive current to accommodate large MOSFETs. It also includes programmable under-voltage lockout with hysteresis and programmable over-temperature protection. The device has both a selectable frequency or synchronizable pulse width modulation (PWM) mode of operation, enabling applications that require precise ON or OFF times, or high levels of transient response.

The LTC3839IUH#PBF features anti-ringing protection which helps to prevent EMI in input capacitor to maintain stable operation. A maximum duty cycle of 95% is allowed in both PWM and frequency mode operations and enables a high-efficiency conversion. From a functional standpoint, the device supports smooth startup, pulsed and forced-continuous synchronous rectification, as well as pulse-skipping mode operations.

In summary, the LTC3839IUH#PBF is a high-performance integrated DC–DC controller and gate driver IC specifically designed for output voltage regulation in a wide range of applications. It offers a combination of high performance and design flexibility, coupled with a wide range of input and output voltage ranges, making it ideal for power engineers to design DC–DC converters.

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