L5988DTR Integrated Circuits (ICs)

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The L5988DTR is an integrated, monolithic, step-down converter with integrated high-side, low-side transistors, current sense and E/A. It can deliver up to 2.0A continuous output current over a wide input voltage range of between 4.7V and 15V. The L5988DTR is a synchronous, highly integrated switching regulator, meaning it uses an external oscillator to generate a pulse width modulated (PWM) signal to control the switch. This makes the device very efficient and flexible, allowing it to be easily adapted to a variety of applications.

The L5988DTR\'s application field include power supplies for laptop computers, tuner and HID lighting, gaming systems and various microprocessor-controlled systems. It is also used in automotive applications, with its low dropout switching providing low power consumption during daylight and high efficiency at low current levels, allowing for ideal power savings in automotive applications.

The working principle of the L5988DTR is based on the oscillator being woken up by a pulse width modulated (PWM) signal. This signal is generated by an internal frequency generator, which drives the power switches via the power stages. When the PWM signal is high, the power switches are opened, while they are closed when the PWM signal is low. The internal power stages generate a unique, low dropout voltage regulation (LDO) with a current sense feature.

The current sense feature gives the L5988DTR greater accuracy in its power management capabilities. A current sense line connected to the load gives the device feedback on the load current, allowing it to adjust its output voltage so as to maintain a constant output current in the specified range. Additionally, the enlarged monitoring and diagnostics capabilities enable the user to set various thresholds and limits for overcurrent, undercurrent and over-temperature conditions.

The L5988DTR can also be used to create a low dropout voltage regulator (LDO) by connecting the current sensing line to the external resistors. The output voltage can be finely adjusted by the user through the use of two external resistors. The output voltage is limited to a range of 0.75V to 1.2V.

The internal series PWM controls the switch-over time of the power switch, thus providing smooth transition from the low dropout (LDO) to the output voltage. This guarantees that the output voltage ripple is minimized and no additional capacitors or inductors are needed for noise suppression. This results in an efficient and stable conversion with low power consumption.

The L5988DTR is a highly efficient and reliable device, ensuring that it canPOWR meet the demands of various applications such as laptop computers, tuners, gaming systems and HID lighting. Its integrated power stages and current sense feature, combined with its ability to create a low dropout voltage regulator, makes the L5988DTR an ideal choice for power applications where space and efficiency are of the utmost importance.

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