S-1122B38MC-L8XTFU

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

The ABLIC S-1122B38MC-L8XTFU is a positive voltage regulator from the S-1112/1122 Series, developed using CMOS technology. It provides a fixed output voltage of 3.8 V with an accuracy of ±1.0%. The device supports an output current of up to 150 mA and features a typical dropout voltage of 190 mV at 100 mA. Current consumption is 50 µA during operation and 0.1 µA during power-off. It includes built-in overcurrent protection and an ON/OFF circuit. Ripple rejection is typically 80 dB at 1.0 kHz. The component operates within a temperature range of -40°C to +85°C and is housed in an SOT-23-5 package.

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 limits load current to prevent damage to the output transistor.
• ON/OFF circuit allows for significant reduction in current consumption to extend battery life in portable devices.
• Compatible with small ceramic capacitors (0.47 µF or more) for phase compensation due to low ESR requirements.

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 the manufacturer's datasheet to confirm pin configuration and environmental codes. Ensure input voltage remains within absolute maximum ratings to avoid physical damage. Confirm that the application board layout minimizes impedance for VIN and VOUT pins to maintain stability. Check that external capacitor values meet the minimum requirements for phase compensation.

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

Select this component when a fixed 3.8 V output is required with high accuracy and low quiescent current. Consider the S-1122 series specifically if the pinout configuration differs from the S-1112 series in the same package. Evaluate thermal dissipation capabilities based on the expected load current and ambient temperature conditions. Ensure the input voltage range supports the required dropout voltage margin under all operating conditions.

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 shares similar electrical characteristics with the S-1112 but utilizes a different pin configuration within the SOT-23-5 package. The series is designed for applications requiring stable voltage regulation with minimal external components and low power consumption.

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

S-1122B38MC-L8ATFU

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

What is the logic level for the ON/OFF pin in the S-1122B38MC-L8XTFU?

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

Can ceramic capacitors be used as the output capacitor?

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