S-1122B18MC-L8DTFG

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

The ABLIC S-1122B18MC-L8DTFG is a positive voltage regulator from the S-1122 Series, utilizing CMOS technology to provide a fixed output voltage of 1.8 V with an accuracy of ±1.0%. It operates within an input voltage range of 2.0 V to 6.5 V and supports an output current of up to 150 mA. The device features a typical dropout voltage of 190 mV at 100 mA and maintains low current consumption of 50 µA during operation. It includes built-in overcurrent protection and an ON/OFF control circuit, housed in a compact SOT-23-5 package suitable for surface mount applications.

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

• Built-in overcurrent protection circuit limits output current to prevent damage.
• Integrated ON/OFF circuit allows for power state control to extend battery life.
• Low dropout voltage achieved through a low on-resistance internal transistor.
• Compatible with small ceramic capacitors for stable phase compensation.

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

• Constant-voltage power supply for battery-powered devices
• Constant-voltage power supply for personal communication devices
• Constant-voltage power supply for home electric appliances
• Constant-voltage power supply for cellular phones

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

Verify the specific ordering suffix against the manufacturer's product name structure documentation to confirm pin configuration and environmental codes. Ensure the selected component matches the required ON/OFF logic type (positive or negative) for the target application design. Cross-reference the datasheet revision to confirm compatibility with standard land patterns and tape specifications.

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

Select this component when a fixed 1.8 V output is required with high accuracy and low quiescent current. Consider the S-1122 series specifically for its distinct pin configuration compared to the S-1112 series in the same package. Evaluate thermal dissipation capabilities if operating near maximum load currents, as power limits are defined by the package mounting conditions.

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

This part belongs to the S-1112/1122 Series of high ripple-rejection and low dropout CMOS voltage regulators. The S-1122 variant is distinguished by its specific pinout arrangement within the SOT-23-5 package, differing from the S-1112 series. The series is designed for portable electronics requiring efficient power management and stable regulation under varying load conditions.

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

S-1122B18MC-L8ATFG

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

What is the function of the NC pin in the SOT-23-5 package?

The NC pin is electrically open and can be connected to either the VIN pin or the VSS pin depending on the layout requirements.

How does the ON/OFF pin operate for the 'B' type product?

For the 'B' type product, applying a high level to the ON/OFF pin turns the regulator ON, while a low level turns it OFF.