S-1121B18MC-N2DTFG

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

The S-1121B18MC-N2DTFG is a fixed positive low dropout (LDO) voltage regulator manufactured by ABLIC Inc. It provides a nominal output voltage of 1.8 V with a maximum dropout voltage of 0.35 V. The device supports a maximum output current of 0.1 A and operates within an input voltage range of 2 V to 6.5 V. It is housed in a lead-free SOT-23 package with five pins, designed for compact surface-mount applications.

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

• Utilizes CMOS technology to achieve high output voltage accuracy and low current consumption during operation.
• Incorporates a built-in overcurrent protector to prevent load current from exceeding the output transistor's capacity.
• Features an ON/OFF control circuit to minimize power consumption and extend battery life in portable devices.

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

• Portable electronic devices requiring efficient power management
• Battery-powered equipment needing extended operational time
• Circuits requiring stable voltage regulation under varying load conditions

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

Verify the specific suffix codes against official ABLIC documentation to confirm pinout compatibility and thermal characteristics. Ensure that the ordering information matches the exact package type and environmental compliance standards required for your assembly process. Cross-reference the manufacturer's latest datasheet to validate any recent revisions or obsolescence notices before finalizing procurement plans.

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

Select this component when a fixed 1.8 V output is required with moderate current demands up to 100 mA. Consider the S-1121 series for its balance of low dropout performance and integrated protection features. Evaluate the SOT-23-5 package constraints regarding thermal dissipation and board space availability relative to alternative regulators in the same family.

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

This part belongs to the S-1121 series of CMOS voltage regulators from ABLIC. The series is characterized by low dropout voltages and high precision, making it suitable for various power management applications. The specific model indicates a fixed 1.8 V output version within this lineup, sharing common architectural features with other variants in the series.

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

Consult official substitution lists for compatible parts within the S-1121 series or equivalent LDO regulators from ABLIC. Verify electrical parameters such as output voltage tolerance and current capability before replacing. Ensure physical package dimensions and pin configurations match to maintain PCB layout integrity without modification.

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

What is the typical quiescent current for the S-1121B18MC-N2DTFG?

The datasheet specifies typical current consumption values for the S-1121 series, which are generally low to support battery-operated applications, though exact figures depend on the specific operating conditions defined in the technical documentation.

Does the S-1121B18MC-N2DTFG include short-circuit protection?

Yes, the device includes a built-in overcurrent protector that prevents the load current from exceeding the current capacity of the output transistor, providing protection against short circuits and excessive loads.