S-1135C28-A6T1U

S-1135C28-A6T1U – Voltage Regulators – Linear

The S-1135C28-A6T1U is a voltage regulator from the original equipment manufacturer (OEM) MICREL. It belongs to the PMIC (power management integrated circuit) linear voltage regulators family. This part has an input voltage that ranges from 5.0V to 30V and an output voltage that ranges from 0.8V to 18V. It has a maximum quiescent current of 1.0 mA and a maximum output current of 2.0 A. It features a built-in output imbalance detection circuit and over-temperature protection.

The S-1135C28-A6T1U is a single-channel, low-dropout (LDO) regulator with a dropout voltage of 1.3V. It offers dual adjustments; one for the output voltage and the other for the slew rate. It provides a Programmable Off-Time (POUT) control which allows users to set the amount of time the part should be inactive, making it useful for power-saving applications. It has a wide operating temperature range from -40°C to +125°C.

Applications

The S-1135C28-A6T1U is a flexible regulator suitable for a wide range of applications. Its low dropout voltage makes it well-suited for high-efficiency voltage conversion. It\'s a popular choice for applications where high power savings and ultra-fast transient response are required. Some of the applications include: DC-DC converters, linear regulators for post-regulation, power supplies for memory modules, step-down power supplies for CPUs, FPGAs, and EPROMs, and more.

Working Principle

The S-1135C28-A6T1U is a low-dropout linear regulator. It uses a common collector (or source follower) configuration to achieve a high output current and low dropout voltage. It has an input voltage range of 5.0V to 30V and an output voltage that can be adjusted to the desired level. Since it operates in linear mode, it dissipates the surplus input voltage as heat, thereby regulating the output voltage. The part features an overload protection circuit which shuts off the part when the output current exceeds the specified value. The over-temperature protection circuit shuts the part off if the temperature of the part rises beyond a specified threshold. This prevents the part from being damaged due to high temperature.

The S-1135C28-A6T1U uses a POUT setting to control the amount of time the regulator is shut off. This helps to save energy and reduce power consumption. The offered dual adjustments; one for the output voltage and the other for the slew rate, makes it a perfect choice for applications where fast transient response and efficient operation are required.

Summary

The S-1135C28-A6T1U is a PMIC linear voltage regulator from MICREL. It is suitable for a wide variety of applications such as DC-DC converters, linear regulators for post-regulation and memory modules, and step-down power supplies for CPUs and FPGAs. It has an input voltage range of 5.0V to 30V and an output voltage range of 0.8V to 18V. Its maximum quiescent current is 1.0 mA and it has a maximum output current of 2.0A. It features overload and over-temperature protection circuits and offers dual adjustments; one for the output voltage and the other for the slew rate. Its low dropout voltage makes it well-suited for high-efficiency voltage conversion.