S-1122B18MC-L8DTFU

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

The ABLIC S-1122B18MC-L8DTFU is a positive voltage regulator from the S-1112/1122 Series, developed using CMOS technology. It provides a fixed output voltage of 1.8 V with an accuracy of ±1.0%. The device operates within an input voltage range of 2.0 V to 6.5 V and supports an output current of up to 150 mA. Key electrical parameters include a typical dropout voltage of 0.25 V at 100 mA, a ripple rejection ratio of 80 dB at 1.0 kHz, and a current consumption of 50 µA during operation. It features built-in overcurrent protection and an ON/OFF control circuit.

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

• Built-in low on-resistance transistor enables low dropout voltage and high output current capability.
• Integrated overcurrent protection circuit limits load current to prevent damage to the output transistor.
• ON/OFF circuit allows for significant reduction in current consumption during power-off states.
• Compatible with small ceramic capacitors (0.47 µF or more) for 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 official documentation to confirm pin configuration and environmental codes. Ensure compatibility with the required output voltage tolerance and package type before procurement. Confirm that the selected component meets the necessary thermal dissipation requirements for the intended application environment.

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 SOT-23-5 package for compact surface-mount designs. Evaluate the input voltage range to ensure it remains above the dropout threshold under all operating conditions. Verify that the external capacitor selection meets the minimum capacitance and ESR specifications for stability.

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 specifically utilizes a different pin configuration compared to the S-1112 series within the same SOT-23-5 package footprint. The series is designed for applications requiring stable regulation with minimal external components.

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

S-1122B18MC-L8ATFx

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

What is the logic level for the ON/OFF pin?

The 'D' in the product code indicates Type B logic, where a High signal turns the regulator ON and a Low signal turns it OFF.

Can ceramic capacitors be used as output capacitors?

Yes, a ceramic capacitor of 0.47 µF or more can be used, provided its Equivalent Series Resistance (ESR) is 10 Ω or less.