S-1112B41MC-L7ATFU

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

The S-1112B41MC-L7ATFU is a positive voltage regulator from the S-1112 Series, manufactured by ABLIC Inc. It provides a fixed output voltage of 4.1 V with an accuracy of ±1.0%. The device supports an output current of up to 150 mA and operates within an input voltage range of 2.0 V to 6.5 V. It features a typical dropout voltage of 190 mV at 100 mA and consumes 50 µA during operation. The component includes an ON/OFF control pin with negative logic, built-in overcurrent protection, and ripple rejection of 80 dB. It is housed in a surface-mount SOT-23-5 package.

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

• Built-in low on-resistance transistor enables high output current capability and low dropout voltage.
• Integrated ON/OFF circuit allows for significant power reduction when the device is disabled.
• High ripple rejection ratio ensures stable output voltage against input noise.
• Built-in overcurrent protection circuit prevents damage from excessive load currents.

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 L7ATFU to confirm the SOT-23-5 package, negative logic ON/OFF pin configuration, and lead-free environmental code. Ensure compatibility with the required 0.47 µF minimum ceramic output capacitor for stability. Confirm that the application's power dissipation requirements do not exceed the package limits under maximum operating conditions.

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

Select this part for applications requiring a precise 4.1 V rail with minimal quiescent current. The negative logic ON/OFF pin requires a low signal to activate regulation. Ensure the input voltage remains at least 1.0 V above the output voltage for optimal performance. Verify that the external capacitors meet the ESR and capacitance specifications to prevent oscillation.

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

This component belongs to the S-1112/1122 Series of CMOS voltage regulators designed for high ripple rejection and low dropout characteristics. The series utilizes P-channel MOS FETs for the output stage. The S-1112 variant specifically offers the SNT-6A(H) and SOT-23-5 packages, distinguishing it from the S-1122 series which shares the SOT-23-5 form factor but differs in pin configuration.

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

S-1112B41MC-L7GTFU (Same electrical specs, different environmental code)

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

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

The 'A' in the product name indicates negative logic, meaning the regulator is enabled when the ON/OFF pin is at a low level (≤ 0.3 V) and disabled when high.

What is the minimum required output capacitor?

A ceramic capacitor of 0.47 µF or more with an Equivalent Series Resistance (ESR) of 10 Ω or less is required for phase compensation and stability.