S-1133B21-U5T1G

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The ABLIC S-1133B21-U5T1G is a positive CMOS voltage regulator with an internally fixed output voltage of 2.1 V and ±1.0% accuracy. It supports up to 300 mA output current within a 2.0 V to 10 V input range. The device features low dropout voltage, high ripple rejection, and low current consumption (60 µA typical). It includes overcurrent protection and thermal shutdown circuits.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Built-in overcurrent protection circuit limits output current to prevent damage.
• Thermal shutdown circuit prevents overheating by stopping operation at elevated junction temperatures.
• ON/OFF pin controls power state to ensure extended battery life in portable applications.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Power supply for battery-powered devices
• Power supply for communication devices
• Power supply for home electric appliances

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and environmental compliance. Ensure input and output capacitor values meet stability requirements, specifically using ceramic capacitors with appropriate capacitance and ESR ratings as defined in the datasheet.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component for designs requiring a fixed 2.1 V rail with moderate current capability. Consider the SOT-89-5 package for board space constraints. Verify that the input voltage remains above the dropout threshold under all load conditions to maintain regulation accuracy.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the S-1133 Series, which offers middle-output current capabilities with high ripple rejection. The series provides both internally set and externally adjustable voltage options across various packages, including SOT-89-5 and SNT-8A, targeting mobile and portable electronics.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Consult official substitution lists for compatible parts within the S-1133 family or other ABLIC LDOs with matching voltage and current ratings. Verify pin compatibility and electrical characteristics before replacing.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

What is the logic level for the ON/OFF pin on the S-1133B series?

For the S-1133B series, the ON/OFF pin uses positive logic. A high voltage level turns the regulator ON, while a low voltage level turns it OFF.

Can ceramic capacitors be used with this regulator?

Yes, ceramic capacitors are recommended. An input capacitor of 1.0 µF or more and an output capacitor of 1.0 µF or more are required. For outputs of 1.7 V or less, use 2.2 µF or more.