S-77101A02-T8T1U4

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The S-77101A02-T8T1U4, or ST8T1U4, is a single unit integrated circuit designed to provide voltage and current regulating functions to system power supplies and replace multiple discrete components. In addition, the ST8T1U4 reduces the complexity, component count and cost of the power supply system while allowing low-noise operation and achieving high efficiency. Designed to be used in battery-backed applications where energy is first stored in a battery and then delivered to the system, the ST8T1U4 is available in an extremely compact 8-pin package.

The primary application of the ST8T1U4 is in power supplies for automotive, industrial electronics, and portable electronic devices such as smartphones, tablets, and other mobile products. With a minimum operating voltage of 3.0V and maximum voltage of 1.8V, the ST8T1U4 offers an extensive input voltage range, making it well suited for a wide variety of applications (source: Cypress).

The ST8T1U4 offers several advantages, including a high accuracy of +/-0.5% maximum and excellent ripple rejection of 60dB minimum at 1kHz. It also provides current limiting capacity up to 4A, helping to protect the system from over-current conditions. The device is also capable of supporting fast transient response time, allowing it to quickly ramp up and down its output voltage, as well as low quiescent current of 8uA in Sleep Mode. Additionally, the unit offers low dropout operation, allowing it to maintain an accurate output voltage even when the input voltage drops below the output voltage by several tenths of a volt.

The ST8T1U4 is designed for use with a wide range of batteries, including Li-ion, Li-polymer, NiCd, and NiMH batteries. By using the internal under-voltage-lockout (UVLO) circuit, the device prevents reverse current from the battery back into the system. It also features over-voltage protection (OVP) and reverse current protection (RCP) circuits to ensure that the system does not exceed its design thresholds. The device also offers selectable sleep/wake activation and over-temperature protection.

The ST8T1U4 employs an advanced circuit design and operates with a precise algorithm to achieve a high level of performance. When the system is first powered on, the device is in a standby mode in which it monitors the output voltage of the system. Once the output voltage reaches its set-point, the device enters pulse-width modulation (PWM) mode where it regulates the voltage by controlling the load current with the help of a built-in timer circuit. In addition, the unit can be programmed to operate in Low Power Mode or Power Save Mode, allowing it to conserve power when the system is not in use.

The ST8T1U4 is designed to be used in systems that require an efficient, low-noise power supply. With its small size, low stand-by current and high efficient voltage regulation, the ST8T1U4 is an ideal choice for automotive and industrial applications, as well as other portable devices. In addition, its wide input voltage range and low quiescent current make it an ideal choice for devices that require extended battery life.

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