AS1358-BTTT-285

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Applied Science 1358-BTTT-285 (hereafter referred to as the \'AS1358-BTTT-285\') is a linear voltage regulator integrated circuit widely used in portable and electronics applications.

The AS1358-BTTT-285 is a step-down voltage regulator that can reduce supply voltages up to 36V to an output voltage as low as 1.8V at a maximum output current of 800mA. It includes a range of protection features, including an over-temperature shutdown, over-current protection, and under voltage lockout.

The AS1358-BTTT-285 uses a linear regulation approach to maintain a constant output voltage, by comparing the output voltage to a reference voltage. When the output voltage rises above the reference voltage, the error amplifier sends a signal to the control circuit, which in turn reduces the switch duty cycle, decreasing the output voltage. Conversely, when the output voltage drops below the reference voltage, the error amplifier increases the control signal, switching on the transistor for longer, thus increasing the output voltage.

The overall performance of the AS1358-BTTT-285 is determined by the external components connected to the device. The output capacitance must withstand the maximum ripple voltage and also must be used to filter high frequency switch noise. While this allows the use of smaller or lower cost capacitors, a larger or higher-quality capacitor option can provide additional filtering, resulting in better noise performance at the expense of device size and increased cost.

The AS1358-BTTT-285 is designed to operate in the range of 1.8V to 36V, regulated down to a regulated output voltage of up to 1.8V. It is usually set up to run in continuous mode, since it requires only a single sense capacitor versus an inductor and its output ripple is limited. It provides a constant voltage output current with good line regulation for both input and output. The device supports output voltage monitoring with a high accuracy of ±1%. It also features high EMI immunity and transient response.

The AS1358-BTTT-285 is well suited for application in the automotive and industrial, communication, computer and consumer applications, such as LED lighting, digital still cameras, CD-ROMs, and power management in notebooks, PDAs and cellular phones. Although the device is designed primarily as a step-down regulator, it is also suitable for use as an adjustable voltage regulator or even a step-up voltage regulator.

Additionally, it is also capable of self-starting and operates down to/up to a very low 0.1/1 MHz, greatly reducing the size of external components. The device also has an Enable pin and a reset pin that can be used to shut down or reset the converter in emergency situations.

The AS1358-BTTT-285 is designed for low-noise, ultra slim and compact systems, with low external component count and low power consumption. It is offered in a low-profile, DIP8 and TSSOP8 package, making it suitable for very small and cost-effective applications.

In summary, the AS1358-BTTT-285 linear voltage regulator is ideal for low power applications that require an output voltage of up to 1.8V and a maximum current of 800mA. It features a wide supply voltage range of 1.8V to 36V and can be used as a step-down, adjustable voltage regulator, or even a step-up voltage regulator. Due to its small size and low-cost, it is a great choice for automotive and industrial, communication, computer and consumer applications.

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