S-1131B19UC-N4ETFU

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

The S-1131B19UC-N4ETFU is a positive voltage regulator from the S-1131 Series, manufactured by ABLIC Inc. It provides a fixed output voltage of 1.9 V with an accuracy of ±1.0%. The device supports an output current of up to 300 mA and operates within an input voltage range of 2.0 V to 6.5 V. It features a dropout voltage of 0.60 V typ. at 100 mA and a ripple rejection of 70 dB typ. at 1.0 kHz. Current consumption is 35 µA typ. during operation and 0.1 µA typ. in power-off mode. The component includes built-in overcurrent protection and an ON/OFF circuit for battery life extension.

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

• Built-in low on-resistance transistor enables low dropout voltage and large output current capability.
• Integrated overcurrent protection circuit prevents load current from exceeding the output transistor's capacity.
• ON/OFF circuit allows stopping internal operation to significantly reduce current consumption during standby.
• Developed based on CMOS technology to ensure high output voltage accuracy and low current consumption.

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

• Constant-voltage power supply for DVD and CD-ROM drives
• Constant-voltage power supply for battery-powered devices
• Constant-voltage power supply for personal communication devices
• Constant-voltage power supply for notebook PCs

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

Verify the specific ordering suffixes against the manufacturer's datasheet to confirm package type (SOT-89-5) and environmental codes (Lead-free, halogen-free). Confirm that the product status aligns with design requirements, as this series may be marked not recommended for new designs. Ensure compatibility with required input/output capacitor ESR values for stable operation.

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

Select this component when a fixed 1.9 V output is required with moderate current demands up to 300 mA. The SOT-89-5 package is suitable for applications requiring an ON/OFF control pin. Designers must account for package power dissipation limits when operating at high output currents or large input-output voltage differentials. Verify that the application environment falls within the specified -40°C to +85°C temperature range.

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

This part belongs to the S-1131 Series of high ripple-rejection and low dropout middle output current CMOS voltage regulators. The series offers selectable output voltages from 1.5 V to 5.5 V in 0.1 V steps. It is designed for portable electronic applications where battery life and stable voltage regulation are critical. The series utilizes small packages like SOT-89-3, SOT-89-5, and 6-Pin HSON(A) to realize high-density mounting.

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

Other parts in the S-1131 Series with different output voltages or packages can serve as functional substitutes if the voltage requirement changes. For example, S-1131B19UA-N4ETFx is the same electrical specification but in an SOT-89-3 package without the ON/OFF pin functionality inherent to the UC suffix.