S-1112B19MC-L6ETFU

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

The S-1112B19MC-L6ETFU is a positive voltage regulator from the S-1112/1122 Series, manufactured by ABLIC Inc. It provides a fixed output voltage of 1.9 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. It features a typical dropout voltage of 0.25 V at 100 mA and a ripple rejection ratio of 80 dB at 1.0 kHz. Current consumption is 50 µA during operation and 0.1 µA in power-off mode. The component utilizes a SOT-23-5 package and functions across an ambient temperature range of -40°C to +85°C.

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

• Built-in ON/OFF circuit enables significant reduction in current consumption for battery-powered applications.
• Low dropout voltage achieved through a built-in low on-resistance P-channel MOS FET output transistor.
• Integrated overcurrent protection circuit limits output current to prevent damage to the load or regulator.
• Compatible with small ceramic capacitors having an ESR of 10 Ω or less 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 L6ETFU against the manufacturer's datasheet to confirm pin configuration and environmental compliance. Ensure the selected variant matches the required ON/OFF logic level (positive or negative) for the target application. Confirm package availability and lead times directly with authorized distributors or the manufacturer, as stock levels fluctuate.

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

Select this component when a fixed 1.9 V output is required with high accuracy and low quiescent current. Ensure the input voltage remains within the 2.0 V to 6.5 V range and that the load current does not exceed 150 mA. Verify that the PCB layout allows for short connections to input and output capacitors to maintain stability and minimize noise.

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

This part belongs to the S-1112 series, which offers various fixed output voltages selectable in 0.1 V steps. The S-1112 series differs from the S-1122 series primarily in pin configuration within the same SOT-23-5 package. Both series share similar electrical characteristics but are designed for different integration requirements regarding control pin polarity.

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

S-1112B19MC-L6ATFU: Same output voltage and package, but features negative logic for the ON/OFF pin instead of positive logic.

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

What is the recommended output capacitor value for stability?

A ceramic capacitor of 0.47 µF or more with an ESR of 10 Ω or less is recommended for the output capacitor (CL).

How does the ON/OFF pin function in this specific model?

The 'B' type designation indicates positive logic; the regulator operates when the ON/OFF pin is set to a high level and stops when set to a low level.