S-1122B17MC-L8CTFU

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

The S-1122B17MC-L8CTFU is a positive voltage regulator from the S-1122 Series, manufactured by ABLIC Inc. It utilizes CMOS technology to provide a fixed output voltage of 1.7 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 when the input voltage exceeds the set output voltage by at least 1.0 V. It features a typical dropout voltage of 0.28 V at 100 mA load and includes 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 P-channel MOS FET output transistor enables low dropout voltage operation.
• Integrated overcurrent protection circuit limits output current to prevent damage during overload conditions.
• Dedicated ON/OFF pin allows for complete shutdown of internal circuits to minimize power consumption.
• Compatible with small ceramic capacitors for output stabilization, supporting high-density mounting.

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 cellular phones

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

Verify the specific ordering suffix L8CTFU against the manufacturer's official product name structure documentation. Confirm that the environmental code U corresponds to lead-free (Sn 100%) and halogen-free specifications as defined in the datasheet. Ensure the package type MC matches the required SOT-23-5 footprint for your design. Cross-reference the part number with the latest revision of the S-1112/1122 Series datasheet to confirm availability and any potential updates to pin configurations or electrical characteristics.

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

Select this component when a stable 1.7 V rail is required from a battery source with minimal voltage drop. Ensure the input voltage remains at least 1.0 V above the output voltage to maintain regulation. Verify that the total power dissipation, considering ambient temperature and board size, does not exceed the package limits. Use a ceramic output capacitor with capacitance of 0.47 µF or more and ESR of 10 Ω or less to ensure stability and prevent oscillation.

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 differs from the S-1112 series in its pin configuration within the SOT-23-5 package. Both series share similar electrical performance characteristics but are distinguished by their internal pin mappings, requiring careful attention to schematic design when substituting between them.

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

The S-1112B17MC-L6CTFx is a functionally equivalent alternative within the same series but utilizes the S-1112 pinout. Direct substitution requires verifying pin compatibility due to the different pin configurations between the S-1112 and S-1122 series in the SOT-23-5 package. No other direct substitutes are documented in the provided datasheet.